[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

CN108919465B - Optical Imaging Lens Group - Google Patents

Optical Imaging Lens Group Download PDF

Info

Publication number
CN108919465B
CN108919465B CN201810917255.2A CN201810917255A CN108919465B CN 108919465 B CN108919465 B CN 108919465B CN 201810917255 A CN201810917255 A CN 201810917255A CN 108919465 B CN108919465 B CN 108919465B
Authority
CN
China
Prior art keywords
lens
optical imaging
optical
image
concave
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810917255.2A
Other languages
Chinese (zh)
Other versions
CN108919465A (en
Inventor
高雪
闻人建科
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Sunny Optics Co Ltd
Original Assignee
Zhejiang Sunny Optics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Sunny Optics Co Ltd filed Critical Zhejiang Sunny Optics Co Ltd
Priority to CN201810917255.2A priority Critical patent/CN108919465B/en
Publication of CN108919465A publication Critical patent/CN108919465A/en
Application granted granted Critical
Publication of CN108919465B publication Critical patent/CN108919465B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

The application discloses an optical imaging lens group, which sequentially comprises the following components from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. The object side surface of the first lens is a concave surface, and the image side surface is a convex surface; the second lens has positive optical power; the fourth lens has negative focal power, and the object side surface and the image side surface of the fourth lens are concave surfaces; the sixth lens has negative focal power; and the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are all made of plastic. The curvature radius R7 of the object side surface of the fourth lens and the curvature radius R8 of the image side surface of the fourth lens meet the condition that R7/R8 is less than or equal to-1.5 and less than or equal to-0.5.

Description

Optical imaging lens group
Technical Field
The present application relates to an optical imaging lens group, and more particularly, to an optical imaging lens group including seven lenses.
Background
With the high-speed development of portable electronic products such as smart phones, the requirements of the market on the shooting of the portable electronic products are higher. Optical lenses mounted on portable electronic products often use photosensitive elements such as Charge Coupled Devices (CCDs) and Complementary Metal Oxide Semiconductors (CMOS) as image sensors. Along with the development of the photosensitive elements in the directions of large image surface, high pixels and the like, the requirements on miniaturization and high imaging quality of the matched optical lens are gradually increased.
Currently, conventional optical imaging lens sets cannot meet requirements of high pixelation, long focal length, small size and the like. In order to achieve clear photographing of a portable electronic product under dim light and obtain a photographing effect of small depth of field and combination of virtual and real, an imaging system mounted on the portable electronic product is required to have good imaging quality and high resolution.
Disclosure of Invention
The present application provides an optical imaging lens set applicable to portable electronic products that at least solves or partially solves at least one of the above-mentioned drawbacks of the prior art.
In one aspect, the present application provides an optical imaging lens group comprising, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens element has a concave object-side surface and a convex image-side surface; the second lens may have positive optical power; the third lens has optical power; the fourth lens element may have negative refractive power, wherein the object-side surface thereof may be concave, and the image-side surface thereof may be concave; the fifth lens has optical power; the sixth lens may have negative optical power; the seventh lens has optical power; and the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens can be all plastic lenses. Wherein, the curvature radius R7 of the object side surface of the fourth lens and the curvature radius R8 of the image side surface of the fourth lens can satisfy R7/R8 less than or equal to-1.5 and less than or equal to-0.5.
In one embodiment, the total effective focal length f of the optical imaging lens group and the effective focal length f4 of the fourth lens may satisfy-2.5 < f/f 4. Ltoreq.1.5.
In one embodiment, the radius of curvature R1 of the object-side surface of the first lens, the radius of curvature R2 of the image-side surface of the first lens, the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens may satisfy-0.5 < (R1+R2)/(R3+R4) < 2.
In one embodiment, the center thickness CT2 of the second lens element and the center thickness CT7 of the seventh lens element can satisfy 1 < CT2/CT7 < 2.
In one embodiment, the distance SAG21 on the optical axis from the intersection of the second lens object side and the optical axis to the effective radius vertex of the second lens object side and the distance SAG72 on the optical axis from the intersection of the seventh lens image side and the optical axis to the effective radius vertex of the seventh lens image side may satisfy-2 < SAG21/SAG72 < -1.
In one embodiment, the combined focal length f34 of the third lens and the fourth lens and the combined focal length f56 of the fifth lens and the sixth lens may satisfy 0.2 < f34/f56 < 1.5.
In one embodiment, the maximum effective radius DT11 of the object-side surface of the first lens and the maximum effective radius DT51 of the object-side surface of the fifth lens may satisfy 2 < DT11/DT51 < 2.5.
In one embodiment, the combined focal length f1234 of the first, second, third and fourth lenses and half the diagonal length ImgH of the effective pixel region on the imaging face of the optical imaging lens group may satisfy 1.5 < f1234/ImgH < 2.5.
In one embodiment, the thickness ET3 of the edge of the third lens element, the thickness CT3 of the center of the third lens element on the optical axis, the thickness ET7 of the edge of the seventh lens element, and the thickness CT7 of the center of the seventh lens element on the optical axis may satisfy 0.1 < (et3×ct3)/(et7× ct7) < 0.4.
In one embodiment, the maximum half field angle HFOV of the optical imaging lens set may satisfy HFOV less than or equal to 35.
In another aspect, the present application also provides an optical imaging lens group, including, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens element has a concave object-side surface and a convex image-side surface; the second lens may have positive optical power; the third lens has optical power; the fourth lens element may have negative refractive power, wherein the object-side surface thereof may be concave, and the image-side surface thereof may be concave; the fifth lens has optical power; the sixth lens may have negative optical power; the seventh lens has optical power. The total effective focal length f of the optical imaging lens group and the effective focal length f4 of the fourth lens can meet the condition that f/f4 is less than or equal to-2.5 and less than or equal to-1.5.
In yet another aspect, the present application provides an optical imaging lens set comprising, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens element has a concave object-side surface and a convex image-side surface; the second lens may have positive optical power; the third lens has optical power; the fourth lens element may have negative refractive power, wherein the object-side surface thereof may be concave, and the image-side surface thereof may be concave; the fifth lens has optical power; the sixth lens may have negative optical power; the seventh lens has optical power. Wherein, the curvature radius R7 of the object side surface of the fourth lens and the curvature radius R8 of the image side surface of the fourth lens can satisfy R7/R8 less than or equal to-1.5 and less than or equal to-0.5.
In yet another aspect, the present application provides an optical imaging lens set comprising, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens element has a concave object-side surface and a convex image-side surface; the second lens may have positive optical power; the third lens has optical power; the fourth lens element may have negative refractive power, wherein the object-side surface thereof may be concave, and the image-side surface thereof may be concave; the fifth lens has optical power; the sixth lens may have negative optical power; the seventh lens has optical power. The radius of curvature R1 of the object-side surface of the first lens element, the radius of curvature R2 of the image-side surface of the first lens element, the radius of curvature R3 of the object-side surface of the second lens element and the radius of curvature R4 of the image-side surface of the second lens element may satisfy-0.5 < (R1+R2)/(R3+R4) < 2.
In yet another aspect, the present application provides an optical imaging lens set comprising, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens element has a concave object-side surface and a convex image-side surface; the second lens may have positive optical power; the third lens has optical power; the fourth lens element may have negative refractive power, wherein the object-side surface thereof may be concave, and the image-side surface thereof may be concave; the fifth lens has optical power; the sixth lens may have negative optical power; the seventh lens has optical power. The center thickness CT2 of the second lens on the optical axis and the center thickness CT7 of the seventh lens on the optical axis can satisfy 1 < CT2/CT7 < 2.
In yet another aspect, the present application provides an optical imaging lens set comprising, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens element has a concave object-side surface and a convex image-side surface; the second lens may have positive optical power; the third lens has optical power; the fourth lens element may have negative refractive power, wherein the object-side surface thereof may be concave, and the image-side surface thereof may be concave; the fifth lens has optical power; the sixth lens may have negative optical power; the seventh lens has optical power. The distance SAG21 between the intersection point of the second lens object side surface and the optical axis and the effective radius vertex of the second lens object side surface on the optical axis and the distance SAG72 between the intersection point of the seventh lens image side surface and the optical axis and the effective radius vertex of the seventh lens image side surface on the optical axis can satisfy the condition that SAG21/SAG72 is less than-2.
In yet another aspect, the present application provides an optical imaging lens set comprising, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens element has a concave object-side surface and a convex image-side surface; the second lens may have positive optical power; the third lens has optical power; the fourth lens element may have negative refractive power, wherein the object-side surface thereof may be concave, and the image-side surface thereof may be concave; the fifth lens has optical power; the sixth lens may have negative optical power; the seventh lens has optical power. The combined focal length f34 of the third lens and the fourth lens and the combined focal length f56 of the fifth lens and the sixth lens can meet the condition that f34/f56 is smaller than 0.2 and smaller than 1.5.
In yet another aspect, the present application provides an optical imaging lens set comprising, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens element has a concave object-side surface and a convex image-side surface; the second lens may have positive optical power; the third lens has optical power; the fourth lens element may have negative refractive power, wherein the object-side surface thereof may be concave, and the image-side surface thereof may be concave; the fifth lens has optical power; the sixth lens may have negative optical power; the seventh lens has optical power. The maximum effective radius DT11 of the object side of the first lens and the maximum effective radius DT51 of the object side of the fifth lens may satisfy 2 < DT11/DT51 < 2.5.
In yet another aspect, the present application provides an optical imaging lens set comprising, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens element has a concave object-side surface and a convex image-side surface; the second lens may have positive optical power; the third lens has optical power; the fourth lens element may have negative refractive power, wherein the object-side surface thereof may be concave, and the image-side surface thereof may be concave; the fifth lens has optical power; the sixth lens may have negative optical power; the seventh lens has optical power. The combined focal length f1234 of the first lens, the second lens, the third lens and the fourth lens and half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens group can meet the requirement that f1234/ImgH is more than 1.5 and less than 2.5.
In yet another aspect, the present application provides an optical imaging lens set comprising, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens element has a concave object-side surface and a convex image-side surface; the second lens may have positive optical power; the third lens has optical power; the fourth lens element may have negative refractive power, wherein the object-side surface thereof may be concave, and the image-side surface thereof may be concave; the fifth lens has optical power; the sixth lens may have negative optical power; the seventh lens has optical power. The thickness ET3 of the edge of the third lens, the thickness CT3 of the center of the third lens on the optical axis, the thickness ET7 of the edge of the seventh lens, and the thickness CT7 of the center of the seventh lens on the optical axis can satisfy 0.1 < (et3×ct3)/(et7×ct7) < 0.4.
In yet another aspect, the present application provides an optical imaging lens set comprising, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens element has a concave object-side surface and a convex image-side surface; the second lens may have positive optical power; the third lens has optical power; the fourth lens element may have negative refractive power, wherein the object-side surface thereof may be concave, and the image-side surface thereof may be concave; the fifth lens has optical power; the sixth lens may have negative optical power; the seventh lens has optical power. Wherein the maximum half field angle HFOV of the optical imaging lens group can meet the HFOV of less than or equal to 35 degrees.
The application adopts seven lenses, and the optical imaging lens group has at least one beneficial effect of long focal length, miniaturization, good imaging quality, good processing characteristics and the like by reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial spacing among the lenses and the like.
Drawings
Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 is a schematic view showing the structure of an optical imaging lens group according to embodiment 1 of the present application;
fig. 2A to 2D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens group of embodiment 1;
FIG. 3 is a schematic view showing the structure of an optical imaging lens group according to embodiment 2 of the present application;
fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens group of embodiment 2;
FIG. 5 is a schematic view showing the structure of an optical imaging lens group according to embodiment 3 of the present application;
fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens group of example 3;
FIG. 7 is a schematic view showing the structure of an optical imaging lens group according to embodiment 4 of the present application;
fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens group of embodiment 4;
FIG. 9 is a schematic view showing the structure of an optical imaging lens group according to embodiment 5 of the present application;
fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens group of example 5;
FIG. 11 is a schematic view showing the structure of an optical imaging lens group according to embodiment 6 of the present application;
fig. 12A to 12D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens group of example 6;
FIG. 13 is a schematic view showing the structure of an optical imaging lens group according to embodiment 7 of the present application;
fig. 14A to 14D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens group of example 7;
FIG. 15 is a schematic view showing the structure of an optical imaging lens group according to embodiment 8 of the present application;
fig. 16A to 16D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens group of example 8;
FIG. 17 is a schematic view showing the structure of an optical imaging lens group according to embodiment 9 of the present application;
fig. 18A to 18D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens group of example 9;
FIG. 19 is a schematic view showing the structure of an optical imaging lens group according to embodiment 10 of the present application;
fig. 20A to 20D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens group of embodiment 10.
Detailed Description
For a better understanding of the application, various aspects of the application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the application and is not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is referred to as the object side of the lens, and the surface of each lens closest to the imaging plane is referred to as the image side of the lens.
It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the application, use of "may" means "one or more embodiments of the application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
The features, principles, and other aspects of the present application are described in detail below.
The optical imaging lens group according to the exemplary embodiment of the present application may include, for example, seven lenses having optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The seven lenses are sequentially arranged from the object side to the image side along the optical axis, and each adjacent lens can have an air space therebetween.
In an exemplary embodiment, the first lens has positive or negative optical power, the object-side surface of which may be concave, and the image-side surface of which may be convex; the second lens may have positive optical power; the third lens has positive optical power or negative optical power; the fourth lens element may have negative refractive power, wherein the object-side surface thereof may be concave, and the image-side surface thereof may be concave; the fifth lens has positive optical power or negative optical power; the sixth lens may have negative optical power; the seventh lens has positive or negative optical power. The optical power of the optical imaging lens group is reasonably set, so that the optical imaging lens group has the function of adjusting the light position, and meanwhile, the total length of the optical imaging lens group can be effectively shortened.
In an exemplary embodiment, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens may be plastic lenses. The lens made of plastic materials is favorable for saving the cost of the optical imaging lens group and reducing the processing difficulty of the lens while obtaining high imaging quality.
In an exemplary embodiment, the object side surface of the second lens may be convex.
In an exemplary embodiment, the image side surface of the third lens may be convex.
In an exemplary embodiment, the image side surface of the fifth lens may be convex.
In an exemplary embodiment, both the object side and the image side of the sixth lens may be concave.
In an exemplary embodiment, the optical imaging lens group of the present application may satisfy the condition-2.5 < f/f4.ltoreq.1.5, where f is the total effective focal length of the optical imaging lens group and f4 is the effective focal length of the fourth lens. In particular, f and f4 can further satisfy-2.22.ltoreq.f4.ltoreq.1.50. The ratio of the total effective focal length of the optical imaging lens group to the effective focal length of the fourth lens is controlled within a reasonable range, so that the overall focal length of the optical imaging lens group can be increased, and the field curvature can be effectively balanced.
In an exemplary embodiment, the optical imaging lens group of the present application may satisfy the condition that-0.5 < (r1+r2)/(r3+r4) < 2, wherein R1 is a radius of curvature of an object side surface of the first lens, R2 is a radius of curvature of an image side surface of the first lens, R3 is a radius of curvature of an object side surface of the second lens, and R4 is a radius of curvature of an image side surface of the second lens. Specifically, R1, R2, R3 and R4 further can satisfy-0.79.ltoreq.R1+R2)/(R3+R4). Ltoreq.1.95. The curvature radius of the first lens and the curvature radius of the second lens are reasonably set, so that the optical imaging lens group can be provided with a larger aperture, and the overall brightness of imaging can be improved.
In an exemplary embodiment, the optical imaging lens group of the present application may satisfy the conditional expression-1.5 < R7/R8. Ltoreq.0.5, wherein R7 is a radius of curvature of an object side surface of the fourth lens, and R8 is a radius of curvature of an image side surface of the fourth lens. Specifically, R7 and R8 may further satisfy-1.29.ltoreq.R7/R8.ltoreq.0.58. The curvature radius of the object side surface of the fourth lens and the curvature radius of the image side surface of the fourth lens are reasonably arranged, so that the field curvature and distortion of the optical imaging lens group can be effectively balanced.
In an exemplary embodiment, the optical imaging lens set of the present application may satisfy the condition 1 < CT2/CT7 < 2, where CT2 is a central thickness of the second lens element on the optical axis, and CT7 is a central thickness of the seventh lens element on the optical axis. Specifically, CT2 and CT7 may further satisfy 1.29.ltoreq.CT2/CT 7.ltoreq.1.81. The ratio of the center thickness of the second lens to the center thickness of the seventh lens is reasonably controlled, so that the on-axis chromatic aberration of the optical imaging lens group can be effectively corrected, and the imaging quality of the optical imaging lens group can be effectively improved.
In an exemplary embodiment, the optical imaging lens group of the present application may satisfy the conditional expression 0.2 < f34/f56 < 1.5, where f34 is a combined focal length of the third lens and the fourth lens, and f56 is a combined focal length of the fifth lens and the sixth lens. Specifically, f34 and f56 may further satisfy 0.27.ltoreq.f34/f56.ltoreq.1.40. The combined focal length of the third lens and the fourth lens and the combined focal length of the fifth lens and the sixth lens are reasonably arranged, so that the angles of incident light rays and emergent light rays of the lenses can be adjusted, and chromatic aberration of the optical imaging lens group can be effectively corrected.
In an exemplary embodiment, the optical imaging lens group of the present application may satisfy the condition-2 < SAG21/SAG72 < -1, wherein SAG21 is a distance on the optical axis between an intersection point of the second lens object side surface and the optical axis and an effective radius vertex of the second lens object side surface, and SAG72 is a distance on the optical axis between an intersection point of the seventh lens image side surface and the optical axis and an effective radius vertex of the seventh lens image side surface. Specifically, SAG21 and SAG72 can further satisfy-1.90.ltoreq.SAG 21/SAG 72.ltoreq.1.09. Meets the condition that SAG21/SAG72 < -1, can effectively adjust the matching degree of the angle between the lens and the principal ray of the chip, can increase the degree of freedom of lens change, and is beneficial to improving the capability of the imaging lens group for correcting astigmatism and field curvature.
In an exemplary embodiment, the optical imaging lens group of the present application may satisfy the condition of 2 < DT11/DT51 < 2.5, wherein DT11 is a maximum effective radius of an object side surface of the first lens and DT51 is a maximum effective radius of an object side surface of the fifth lens. Specifically, DT11 and DT51 may further satisfy 2.15.ltoreq.DT 11/DT 51.ltoreq.2.24. The ratio between the effective radius of the first lens object side surface and the effective radius of the fifth lens object side surface is reasonably controlled, so that the assembly of the optical imaging lens group is facilitated, and meanwhile, the optical imaging lens group is guaranteed to have excellent manufacturability.
In an exemplary embodiment, the optical imaging lens group of the present application may satisfy the condition that f1234/ImgH < 2.5, where f1234 is the combined focal length of the first lens, the second lens, the third lens and the fourth lens, and ImgH is half of the diagonal length of the effective pixel region on the imaging face of the optical imaging lens group. Specifically, f1234 and ImgH may further satisfy 1.70.ltoreq.f1234/ImgH.ltoreq.2.33. Satisfies the condition that f1234/ImgH is less than 2.5 and 1.5, and can effectively ensure the imaging area of the lens. By reasonably distributing the combined focal lengths of the first lens, the second lens, the third lens and the fourth lens, the deflection of light rays can be alleviated, and the sensitivity of the system is reduced; while also reducing astigmatism, distortion, and chromatic aberration of the imaging lens group.
In an exemplary embodiment, the optical imaging lens group of the present application may satisfy the condition that (ET 3×ct3)/(ET 7×ct7) < 0.4, where ET3 is an edge thickness of the third lens, CT3 is a center thickness of the third lens on the optical axis, ET7 is an edge thickness of the seventh lens, and CT7 is a center thickness of the seventh lens on the optical axis. Specifically, ET3, CT3, ET7 and CT7 can further satisfy 0.18.ltoreq.ET 3 XCT 3)/(ET 7 XCT 7.ltoreq.0.39. ET3, CT3, ET7 and CT7 are reasonably set, so that the lens size of the optical imaging lens set can be effectively reduced, the volume of the optical imaging lens is prevented from being too large, and the requirement of the compact imaging lens set is further met.
In an exemplary embodiment, the optical imaging lens set of the present application may satisfy the condition HFOV of 35 or less, where HFOV is the maximum half field angle of the optical imaging lens set. In particular, HFOV's may further satisfy 25.ltoreq.HFOV.ltoreq.30°, e.g., 26.7.ltoreq.HFOV.ltoreq.27.8°. The full view angle of the imaging lens group is controlled to be not more than 70 degrees, and the optical imaging lens group can have longer focal length under the condition that the size of the image surface of the sensor is specific. With the increase of the focal length, the optical imaging lens group can have larger magnification and smaller depth of field.
In an exemplary embodiment, the optical imaging lens set may further include a diaphragm to improve the imaging quality of the lens. Alternatively, a diaphragm may be provided between the first lens and the second lens.
Optionally, the optical imaging lens set may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on the imaging surface.
The optical imaging lens set according to the above embodiment of the present application may employ a plurality of lenses, such as seven lenses described above. By reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial spacing between each lens and the like, the volume of the lens can be effectively reduced, the sensitivity of the lens can be reduced, and the processability of the lens can be improved, so that the optical imaging lens group is more beneficial to production and processing and can be suitable for portable electronic products. The optical imaging lens set configured as described above can also have the beneficial effects of long focal length, good processing characteristics, high imaging quality, and the like.
In an embodiment of the present application, at least one of the mirrors of each lens is an aspherical mirror. The aspherical lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality.
However, those skilled in the art will appreciate that the number of lenses making up an optical imaging lens group can be varied to achieve the various results and advantages described in this specification without departing from the scope of the application as claimed. For example, although seven lenses are described as an example in the embodiment, the optical imaging lens group is not limited to include seven lenses. The optical imaging lens group may also include other numbers of lenses, if desired.
Specific examples of optical imaging lens sets applicable to the above embodiments are further described below with reference to the accompanying drawings.
Example 1
An optical imaging lens group according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic configuration of an optical imaging lens group according to embodiment 1 of the present application.
As shown in fig. 1, an optical imaging lens group according to an exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an optical filter E8, and an imaging surface S17.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is convex. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave, and an image-side surface S12 thereof is concave. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is concave, and an image-side surface S14 thereof is convex. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this embodiment, the lenses E1-E7 are all plastic lenses.
Table 1 shows the surface types, radii of curvature, thicknesses, materials, and conic coefficients of the respective lenses of the optical imaging lens group of example 1, wherein the radii of curvature and thicknesses are each in millimeters (mm).
TABLE 1
As can be seen from table 1, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspheric. In the present embodiment, the surface shape x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:
wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is the conic coefficient (given in table 1); ai is the correction coefficient of the aspherical i-th order. Table 2 below shows the higher order coefficients A that can be used for each of the aspherical mirrors S1-S14 in example 1 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 And A 20 。
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 6.3529E-03 6.3609E-03 -4.0059E-03 1.7109E-02 -4.3699E-02 6.5487E-02 -5.3420E-02 2.1972E-02 -3.5378E-03
S4 -5.0542E-02 2.5950E-01 -4.9997E-01 4.9184E-01 -3.1893E-01 1.8828E-01 -9.6508E-02 2.9256E-02 -3.4348E-03
S5 -1.0160E-01 6.7720E-01 -1.7657E+00 2.8552E+00 -3.8141E+00 4.1455E+00 -2.9945E+00 1.1929E+00 -1.9600E-01
S6 -1.3673E-01 1.3318E+00 -4.7692E+00 1.0579E+01 -1.6476E+01 1.8292E+01 -1.3511E+01 5.7932E+00 -1.0720E+00
S7 -2.2270E-01 1.3510E+00 -5.0426E+00 1.2832E+01 -2.2071E+01 2.5473E+01 -1.9011E+01 8.2905E+00 -1.5968E+00
S8 -3.0209E-02 8.4801E-01 -5.7852E+00 2.5835E+01 -7.3488E+01 1.3328E+02 -1.5004E+02 9.5590E+01 -2.6323E+01
S9 -7.1047E-02 -1.0279E+00 8.4540E+00 -4.6023E+01 1.5814E+02 -3.4477E+02 4.5729E+02 -3.3693E+02 1.0566E+02
S10 -5.5787E-01 2.7896E+00 -1.3516E+01 5.0848E+01 -1.3290E+02 2.2956E+02 -2.5217E+02 1.5991E+02 -4.4416E+01
S11 -3.2653E-01 6.7484E-01 -2.5787E+00 1.2607E+01 -4.0036E+01 7.8011E+01 -9.4268E+01 6.5309E+01 -1.9680E+01
S12 -8.8160E-02 -3.8082E-01 2.0239E+00 -5.1603E+00 8.3681E+00 -8.9091E+00 6.0285E+00 -2.3335E+00 3.8869E-01
S13 -6.9417E-02 1.1548E-02 -3.1568E-03 -1.0005E-03 9.7082E-03 -1.0849E-02 5.6188E-03 -1.3992E-03 1.3373E-04
S14 -6.6025E-02 -2.3297E-04 1.8761E-02 -2.7045E-02 2.1659E-02 -1.0138E-02 2.7313E-03 -3.8775E-04 2.2348E-05
TABLE 2
Table 3 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 1, the total effective focal length f of the optical imaging lens group, the total optical length TTL (i.e., the distance on the optical axis from the object side surface S1 to the imaging surface S17 of the first lens E1), half the diagonal length ImgH of the effective pixel region on the imaging surface S17, and the maximum half field angle HFOV.
f1(mm) -338.24 f7(mm) 216.28
f2(mm) 2.81 f(mm) 5.78
f3(mm) 10.62 TTL(mm) 5.75
f4(mm) -2.97 ImgH(mm) 2.29
f5(mm) 5.23 HFOV(°) 27.8
f6(mm) -3.35
TABLE 3 Table 3
The optical imaging lens group in example 1 satisfies:
ff4= -1.95, where f is the total effective focal length of the optical imaging lens group and f4 is the effective focal length of the fourth lens E4;
(r1+r2)/(r3+r4) = -0.39, wherein R1 is the radius of curvature of the object-side surface S1 of the first lens element E1, R2 is the radius of curvature of the image-side surface S2 of the first lens element E1, R3 is the radius of curvature of the object-side surface S3 of the second lens element E2, and R4 is the radius of curvature of the image-side surface S4 of the second lens element E2;
r7/r8= -1.29, where R7 is the radius of curvature of the object-side surface S7 of the fourth lens element E4, and R8 is the radius of curvature of the image-side surface S8 of the fourth lens element E4;
CT2/CT7 = 1.29, wherein CT2 is the center thickness of the second lens element E2 on the optical axis, and CT7 is the center thickness of the seventh lens element E7 on the optical axis;
f34/f56=0.44, where f34 is the combined focal length of the third lens E3 and the fourth lens E4, and f56 is the combined focal length of the fifth lens E5 and the sixth lens E6;
SAG21/SAG 72= -1.32, wherein SAG21 is the distance on the optical axis between the intersection point of the object side surface S3 of the second lens element E2 and the optical axis and the vertex of the effective radius of the object side surface S3 of the second lens element E2, and SAG72 is the distance on the optical axis between the intersection point of the image side surface S14 of the seventh lens element E7 and the optical axis and the vertex of the effective radius of the image side surface S14 of the seventh lens element E7;
DT11/DT51 = 2.20, wherein DT11 is the maximum effective radius of the object-side surface S1 of the first lens E1, and DT51 is the maximum effective radius of the object-side surface S9 of the fifth lens E5;
f 1234/imgh=2.03, wherein f1234 is the combined focal length of the first, second, third and fourth lenses E1, E2, E3, E4, imgH is half the diagonal length of the effective pixel region on the imaging surface S17 of the optical imaging lens group;
(ET 3×ct 3)/(ET 7×ct 7) =0.19, wherein ET3 is the edge thickness of the third lens E3, CT3 is the center thickness of the third lens E3 on the optical axis, ET7 is the edge thickness of the seventh lens E7, and CT7 is the center thickness of the seventh lens E7 on the optical axis;
HFOV = 27.8 °, wherein HFOV is the maximum half field angle of the optical imaging lens set.
Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens set of embodiment 1, which represents the deviation of the converging focus of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve of the optical imaging lens group of example 1, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 2C shows distortion curves of the optical imaging lens set of example 1, which represent distortion magnitude values corresponding to different image heights. Fig. 2D shows a magnification chromatic aberration curve of the optical imaging lens group of embodiment 1, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens set in embodiment 1 can achieve good imaging quality.
Example 2
An optical imaging lens group according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. In this embodiment and the following embodiments, descriptions of portions similar to embodiment 1 will be omitted for brevity. Fig. 3 shows a schematic structural view of an optical imaging lens group according to embodiment 2 of the present application.
As shown in fig. 3, the optical imaging lens group according to the exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an optical filter E8, and an imaging surface S17.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is convex. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave, and an image-side surface S12 thereof is concave. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is concave, and an image-side surface S14 thereof is convex. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this embodiment, the lenses E1-E7 are all plastic lenses.
Table 4 shows the surface types, radii of curvature, thicknesses, materials, and conic coefficients of the respective lenses of the optical imaging lens group of example 2, wherein the radii of curvature and thicknesses are each in millimeters (mm).
TABLE 4 Table 4
As can be seen from table 4, in embodiment 2, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 5 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 2, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
TABLE 5
Table 6 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 2, the total effective focal length f of the optical imaging lens group, the total optical length TTL, half the diagonal length ImgH of the effective pixel area on the imaging surface S17, and the maximum half field angle HFOV.
f1(mm) -304.47 f7(mm) 112.34
f2(mm) 2.76 f(mm) 5.78
f3(mm) 11.46 TTL(mm) 5.75
f4(mm) -2.94 ImgH(mm) 2.29
f5(mm) 5.04 HFOV(°) 27.8
f6(mm) -3.28
TABLE 6
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens set of embodiment 2, which represents the deviation of the converging focus of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve of the optical imaging lens group of example 2, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 4C shows a distortion curve of the optical imaging lens set of example 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a magnification chromatic aberration curve of the optical imaging lens group of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens set in embodiment 2 can achieve good imaging quality.
Example 3
An optical imaging lens group according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic structural view of an optical imaging lens group according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens group according to the exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an optical filter E8, and an imaging surface S17.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is convex. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is convex. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave, and an image-side surface S12 thereof is concave. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is concave, and an image-side surface S14 thereof is convex. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this embodiment, the lenses E1-E7 are all plastic lenses.
Table 7 shows the surface types, radii of curvature, thicknesses, materials, and conic coefficients of the respective lenses of the optical imaging lens group of example 3, wherein the radii of curvature and thicknesses are each in millimeters (mm).
TABLE 7
As is clear from table 7, in embodiment 3, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 8 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 3, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 1.0894E-02 -3.2696E-02 1.8042E-01 -4.9211E-01 8.1763E-01 -8.3877E-01 5.2186E-01 -1.8076E-01 2.6835E-02
S4 -9.4043E-03 2.2019E-01 -1.0641E+00 2.6121E+00 -3.9386E+00 3.8131E+00 -2.3153E+00 8.0412E-01 -1.2157E-01
S5 4.7720E-03 4.0577E-01 -2.3230E+00 5.9613E+00 -9.0754E+00 8.6770E+00 -5.1042E+00 1.6920E+00 -2.4279E-01
S6 -1.1603E-02 7.7517E-01 -4.3834E+00 1.3209E+01 -2.4302E+01 2.7994E+01 -1.9628E+01 7.6368E+00 -1.2599E+00
S7 -1.6024E-01 9.1726E-01 -3.8568E+00 1.2050E+01 -2.5260E+01 3.3986E+01 -2.8081E+01 1.2952E+01 -2.5475E+00
S8 -3.5784E-02 7.7390E-01 -5.2919E+00 2.6888E+01 -8.8219E+01 1.8138E+02 -2.2631E+02 1.5659E+02 -4.6046E+01
S9 -9.5240E-02 -6.8064E-01 5.1783E+00 -2.9121E+01 1.0231E+02 -2.3002E+02 3.1546E+02 -2.4050E+02 7.7986E+01
S10 -4.6798E-01 1.9175E+00 -8.8156E+00 2.9751E+01 -6.6183E+01 9.1666E+01 -7.5258E+01 3.3569E+01 -6.3280E+00
S11 -3.1843E-01 3.8115E-01 -2.2466E+00 1.3049E+01 -3.6897E+01 5.6522E+01 -4.6954E+01 1.9348E+01 -2.9381E+00
S12 -7.2313E-02 -7.3491E-01 3.3547E+00 -8.0893E+00 1.2631E+01 -1.2885E+01 8.2874E+00 -3.0466E+00 4.8658E-01
S13 -7.9145E-02 8.3855E-03 -1.3741E-02 1.7565E-02 -1.0228E-02 2.9441E-03 9.9178E-05 -2.4689E-04 3.7359E-05
S14 -7.0707E-02 5.7876E-03 -4.5197E-03 4.6879E-03 -3.2014E-03 1.5203E-03 -4.7945E-04 8.9146E-05 -6.9524E-06
TABLE 8
Table 9 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 3, the total effective focal length f of the optical imaging lens group, the total optical length TTL, half the diagonal length ImgH of the effective pixel area on the imaging surface S17, and the maximum half field angle HFOV.
f1(mm) -153.79 f7(mm) 51.27
f2(mm) 2.67 f(mm) 5.79
f3(mm) 14.04 TTL(mm) 5.76
f4(mm) -2.97 ImgH(mm) 2.29
f5(mm) 5.23 HFOV(°) 27.8
f6(mm) -3.30
TABLE 9
Fig. 6A shows an on-axis chromatic aberration curve for the optical imaging lens set of example 3, which indicates the deviation of the converging focus of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve of the optical imaging lens group of example 3, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 6C shows a distortion curve of the optical imaging lens set of example 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6D shows a magnification chromatic aberration curve of the optical imaging lens group of embodiment 3, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens set in embodiment 3 can achieve good imaging quality.
Example 4
An optical imaging lens group according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic structural view of an optical imaging lens group according to embodiment 4 of the present application.
As shown in fig. 7, the optical imaging lens group according to the exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an optical filter E8, and an imaging surface S17.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is convex. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave, and an image-side surface S12 thereof is concave. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is convex. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this embodiment, the lenses E1-E7 are all plastic lenses.
Table 10 shows the surface types, radii of curvature, thicknesses, materials, and conic coefficients of the respective lenses of the optical imaging lens group of example 4, wherein the radii of curvature and thicknesses are each in millimeters (mm).
Table 10
As can be seen from table 10, in example 4, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 11 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 4, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 9.7074E-03 -2.5913E-02 1.4759E-01 -3.9052E-01 6.2701E-01 -6.1940E-01 3.7040E-01 -1.2342E-01 1.7694E-02
S4 -5.3719E-02 3.6300E-01 -1.1022E+00 2.1110E+00 -2.8315E+00 2.6039E+00 -1.5325E+00 5.1596E-01 -7.5280E-02
S5 -8.6657E-02 7.7485E-01 -2.6311E+00 5.3654E+00 -7.6311E+00 7.4969E+00 -4.7201E+00 1.6901E+00 -2.6053E-01
S6 -1.1128E-01 1.3483E+00 -5.6363E+00 1.4309E+01 -2.4096E+01 2.6896E+01 -1.8966E+01 7.6003E+00 -1.3128E+00
S7 -2.2887E-01 1.4088E+00 -5.7075E+00 1.6213E+01 -3.0948E+01 3.8670E+01 -3.0290E+01 1.3478E+01 -2.5941E+00
S8 -3.9771E-02 8.5919E-01 -5.7664E+00 2.6799E+01 -7.9829E+01 1.5069E+02 -1.7507E+02 1.1422E+02 -3.2008E+01
S9 -1.0898E-01 -3.5687E-01 2.1521E+00 -1.1859E+01 3.9934E+01 -8.4261E+01 1.0384E+02 -6.7776E+01 1.7644E+01
S10 -5.5651E-01 3.2327E+00 -1.7412E+01 6.6072E+01 -1.6822E+02 2.7973E+02 -2.9293E+02 1.7611E+02 -4.6355E+01
S11 -3.4920E-01 1.1370E+00 -6.3587E+00 2.6144E+01 -6.5721E+01 1.0169E+02 -9.6153E+01 5.2142E+01 -1.2651E+01
S12 -7.8123E-02 -5.1149E-01 2.2914E+00 -5.2851E+00 7.8587E+00 -7.6656E+00 4.7407E+00 -1.6739E+00 2.5347E-01
S13 -6.6770E-02 3.1978E-04 2.2773E-02 -4.1573E-02 4.5285E-02 -2.9445E-02 1.1264E-02 -2.2997E-03 1.9138E-04
S14 -6.3141E-02 -1.9915E-03 1.5368E-02 -1.8187E-02 1.2123E-02 -4.7231E-03 1.0270E-03 -1.0844E-04 3.9122E-06
TABLE 11
Table 12 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 4, the total effective focal length f of the optical imaging lens group, the total optical length TTL, half the diagonal length ImgH of the effective pixel area on the imaging surface S17, and the maximum half field angle HFOV.
f1(mm) -234.80 f7(mm) 38.57
f2(mm) 2.81 f(mm) 5.79
f3(mm) 10.37 TTL(mm) 5.76
f4(mm) -2.92 ImgH(mm) 2.29
f5(mm) 5.11 HFOV(°) 27.8
f6(mm) -3.19
Table 12
Fig. 8A shows an on-axis chromatic aberration curve for the optical imaging lens set of example 4, which indicates the deviation of the converging focus of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve of the optical imaging lens group of example 4, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 8C shows a distortion curve of the optical imaging lens set of example 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a chromatic aberration of magnification curve of the optical imaging lens set of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens set in embodiment 4 can achieve good imaging quality.
Example 5
An optical imaging lens group according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic structural view of an optical imaging lens group according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging lens group according to the exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an optical filter E8, and an imaging surface S17.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is convex. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave, and an image-side surface S12 thereof is concave. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this embodiment, the lenses E1-E7 are all plastic lenses.
Table 13 shows the surface types, radii of curvature, thicknesses, materials, and conic coefficients of the respective lenses of the optical imaging lens group of example 5, wherein the radii of curvature and thicknesses are each in millimeters (mm).
TABLE 13
As is clear from table 13, in example 5, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 14 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 5, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 1.1254E-02 -3.0836E-02 1.7345E-01 -4.7985E-01 8.0967E-01 -8.4308E-01 5.3242E-01 -1.8713E-01 2.8191E-02
S4 1.0045E-02 1.2932E-01 -9.0491E-01 2.5368E+00 -4.1574E+00 4.2944E+00 -2.7575E+00 1.0070E+00 -1.5920E-01
S5 4.8927E-02 1.3496E-01 -1.5310E+00 4.4911E+00 -7.1534E+00 6.8952E+00 -4.0198E+00 1.3171E+00 -1.8837E-01
S6 5.0387E-02 2.9629E-01 -2.6155E+00 9.2257E+00 -1.8197E+01 2.1467E+01 -1.4983E+01 5.6869E+00 -8.9808E-01
S7 -1.2786E-01 5.8315E-01 -2.4292E+00 8.5697E+00 -1.9997E+01 2.9003E+01 -2.5257E+01 1.2109E+01 -2.4536E+00
S8 -2.2368E-02 6.8448E-01 -5.0824E+00 2.7309E+01 -9.2258E+01 1.9293E+02 -2.4317E+02 1.6931E+02 -4.9956E+01
S9 -1.1006E-01 -5.4078E-01 4.0719E+00 -2.4448E+01 9.1394E+01 -2.1632E+02 3.0980E+02 -2.4439E+02 8.1206E+01
S10 -4.8162E-01 2.4064E+00 -1.1853E+01 4.0142E+01 -8.9522E+01 1.2672E+02 -1.0839E+02 5.1074E+01 -1.0237E+01
S11 -4.0646E-01 1.3861E+00 -7.4047E+00 2.9024E+01 -7.0393E+01 1.0410E+02 -9.0334E+01 4.2017E+01 -8.0652E+00
S12 -9.4544E-02 -4.9453E-01 2.2871E+00 -5.2767E+00 7.8028E+00 -7.5284E+00 4.5989E+00 -1.6172E+00 2.4889E-01
S13 -8.1064E-02 1.3191E-02 -1.1529E-02 1.0404E-02 -2.8133E-03 -1.8290E-03 1.8401E-03 -5.6844E-04 6.0850E-05
S14 -7.6783E-02 9.0379E-03 -6.4693E-03 6.7253E-03 -5.0601E-03 2.5832E-03 -8.4571E-04 1.5871E-04 -1.2397E-05
TABLE 14
Table 15 shows the effective focal lengths f1 to f7 of the respective lenses in example 5, the total effective focal length f of the optical imaging lens group, the total optical length TTL, half the diagonal length ImgH of the effective pixel area on the imaging surface S17, and the maximum half field angle HFOV.
f1(mm) -168.93 f7(mm) 24.07
f2(mm) 2.83 f(mm) 5.79
f3(mm) 10.26 TTL(mm) 5.76
f4(mm) -2.89 ImgH(mm) 2.29
f5(mm) 5.60 HFOV(°) 26.7
f6(mm) -3.33
TABLE 15
Fig. 10A shows an on-axis chromatic aberration curve for the optical imaging lens set of example 5, which indicates the deviation of the converging focus of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve of the optical imaging lens group of example 5, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 10C shows a distortion curve of the optical imaging lens set of example 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10D shows a magnification chromatic aberration curve of the optical imaging lens group of embodiment 5, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens set provided in embodiment 5 can achieve good imaging quality.
Example 6
An optical imaging lens group according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic structural view of an optical imaging lens group according to embodiment 6 of the present application.
As shown in fig. 11, the optical imaging lens group according to the exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an optical filter E8, and an imaging surface S17.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is convex. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave, and an image-side surface S12 thereof is concave. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this embodiment, the lenses E1-E7 are all plastic lenses.
Table 16 shows the surface types, radii of curvature, thicknesses, materials, and conic coefficients of the respective lenses of the optical imaging lens group of example 6, wherein the radii of curvature and thicknesses are each in millimeters (mm).
Table 16
As is clear from table 16, in example 6, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 17 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 6, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 1.0952E-02 -2.7848E-02 1.5798E-01 -4.3664E-01 7.3821E-01 -7.6962E-01 4.8665E-01 -1.7130E-01 2.5876E-02
S4 1.0964E-02 8.0742E-02 -6.8160E-01 2.0622E+00 -3.5768E+00 3.8565E+00 -2.5517E+00 9.5020E-01 -1.5206E-01
S5 5.9778E-02 1.8503E-02 -1.0278E+00 3.4601E+00 -6.1356E+00 6.5574E+00 -4.2120E+00 1.5048E+00 -2.3101E-01
S6 6.0513E-02 1.3224E-01 -1.5047E+00 5.6285E+00 -1.1715E+01 1.4563E+01 -1.0648E+01 4.2015E+00 -6.8333E-01
S7 -1.7332E-01 6.6005E-01 -1.8460E+00 5.1928E+00 -1.1650E+01 1.7394E+01 -1.5879E+01 7.9998E+00 -1.6986E+00
S8 -4.5780E-02 8.0658E-01 -5.2336E+00 2.7931E+01 -9.6432E+01 2.0741E+02 -2.6876E+02 1.9180E+02 -5.7697E+01
S9 -1.3448E-01 -4.9526E-01 3.4673E+00 -2.0026E+01 7.3458E+01 -1.7204E+02 2.4467E+02 -1.9318E+02 6.5094E+01
S10 -3.5465E-01 1.4880E+00 -7.8691E+00 2.7033E+01 -5.8799E+01 7.8652E+01 -6.2166E+01 2.6669E+01 -4.7823E+00
S11 -2.9465E-01 3.9408E-01 -1.9714E+00 8.7363E+00 -1.9086E+01 1.9563E+01 -4.9176E+00 -5.6215E+00 3.1532E+00
S12 -1.0242E-01 -4.9685E-01 2.5924E+00 -6.4972E+00 1.0354E+01 -1.0752E+01 7.0411E+00 -2.6399E+00 4.3239E-01
S13 -6.1553E-02 2.5989E-03 -5.3902E-04 7.1064E-03 -6.7667E-03 3.5137E-03 -1.0322E-03 1.5578E-04 -9.0031E-06
S14 -8.1429E-02 1.6945E-02 -1.0889E-02 9.4600E-03 -5.9145E-03 2.4713E-03 -6.3918E-04 9.2929E-05 -5.7484E-06
TABLE 17
Table 18 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 6, the total effective focal length f of the optical imaging lens group, the total optical length TTL, half the diagonal length ImgH of the effective pixel area on the imaging surface S17, and the maximum half field angle HFOV.
TABLE 18
Fig. 12A shows an on-axis chromatic aberration curve for the optical imaging lens set of example 6, which indicates the deviation of the converging focus of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve of the optical imaging lens group of example 6, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 12C shows a distortion curve of the optical imaging lens set of example 6, which represents distortion magnitude values corresponding to different image heights. Fig. 12D shows a magnification chromatic aberration curve of the optical imaging lens group of embodiment 6, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens set in embodiment 6 can achieve good imaging quality.
Example 7
An optical imaging lens group according to embodiment 7 of the present application is described below with reference to fig. 13 to 14D. Fig. 13 shows a schematic structural view of an optical imaging lens group according to embodiment 7 of the present application.
As shown in fig. 13, the optical imaging lens group according to the exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an optical filter E8, and an imaging surface S17.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is convex. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave, and an image-side surface S12 thereof is concave. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is convex. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this embodiment, the lenses E1-E7 are all plastic lenses.
Table 19 shows the surface types, radii of curvature, thicknesses, materials, and conic coefficients of the respective lenses of the optical imaging lens group of example 7, wherein the radii of curvature and thicknesses are each in millimeters (mm).
TABLE 19
As is clear from table 19, in example 7, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 20 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 7, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Table 20
Table 21 shows the effective focal lengths f1 to f7 of the respective lenses in example 7, the total effective focal length f of the optical imaging lens group, the total optical length TTL, half the diagonal length ImgH of the effective pixel region on the imaging surface S17, and the maximum half field angle HFOV.
f1(mm) -129.01 f7(mm) 37.40
f2(mm) 2.35 f(mm) 5.79
f3(mm) -999.96 TTL(mm) 5.76
f4(mm) -3.04 ImgH(mm) 2.29
f5(mm) 5.33 HFOV(°) 27.8
f6(mm) -3.27
Table 21
Fig. 14A shows an on-axis chromatic aberration curve for the optical imaging lens set of example 7, which indicates the deviation of the converging focus of light rays of different wavelengths after passing through the lens. Fig. 14B shows an astigmatism curve of the optical imaging lens group of example 7, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 14C shows a distortion curve of the optical imaging lens set of example 7, which represents distortion magnitude values corresponding to different image heights. Fig. 14D shows a magnification chromatic aberration curve of the optical imaging lens group of embodiment 7, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 14A to 14D, the optical imaging lens set of embodiment 7 can achieve good imaging quality.
Example 8
An optical imaging lens group according to embodiment 8 of the present application is described below with reference to fig. 15 to 16D. Fig. 15 shows a schematic structural view of an optical imaging lens group according to embodiment 8 of the present application.
As shown in fig. 15, the optical imaging lens group according to the exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an optical filter E8, and an imaging surface S17.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is convex. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave, and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein an object-side surface S13 thereof is concave and an image-side surface S14 thereof is convex. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this embodiment, the lenses E1-E7 are all plastic lenses.
Table 22 shows the surface types, radii of curvature, thicknesses, materials, and conic coefficients of the respective lenses of the optical imaging lens group of example 8, wherein the radii of curvature and thicknesses are each in millimeters (mm).
Table 22
As can be seen from table 22, in example 8, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 23 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 8, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 1.0211E-02 -2.6800E-02 1.5624E-01 -4.2912E-01 7.1461E-01 -7.3204E-01 4.5390E-01 -1.5664E-01 2.3191E-02
S4 -2.3196E-02 2.5804E-01 -1.0400E+00 2.3924E+00 -3.5879E+00 3.5267E+00 -2.1753E+00 7.6295E-01 -1.1578E-01
S5 -2.0645E-02 4.8486E-01 -2.1794E+00 5.1658E+00 -7.8843E+00 7.8727E+00 -4.9067E+00 1.7268E+00 -2.6233E-01
S6 -4.2388E-02 8.9074E-01 -4.3372E+00 1.2287E+01 -2.2248E+01 2.5852E+01 -1.8523E+01 7.4167E+00 -1.2651E+00
S7 -1.9449E-01 1.0749E+00 -4.2632E+00 1.2724E+01 -2.5922E+01 3.4358E+01 -2.8240E+01 1.3045E+01 -2.5817E+00
S8 -5.2842E-02 8.8679E-01 -5.8678E+00 2.8838E+01 -9.1745E+01 1.8397E+02 -2.2506E+02 1.5331E+02 -4.4506E+01
S9 -1.0597E-01 -5.1425E-01 3.8154E+00 -2.1108E+01 7.2508E+01 -1.5887E+02 2.1078E+02 -1.5423E+02 4.7567E+01
S10 -5.1069E-01 2.2771E+00 -1.0497E+01 3.5713E+01 -8.1684E+01 1.1935E+02 -1.0723E+02 5.4887E+01 -1.2483E+01
S11 -3.1757E-01 4.7121E-01 -2.0144E+00 9.6427E+00 -2.4336E+01 3.1668E+01 -1.9093E+01 2.9754E+00 9.4993E-01
S12 -9.8008E-02 -4.8875E-01 2.3593E+00 -5.5700E+00 8.3544E+00 -8.1143E+00 4.9524E+00 -1.7161E+00 2.5411E-01
S13 -7.1778E-02 -2.8259E-03 3.1064E-02 -6.5140E-02 7.9005E-02 -5.6224E-02 2.3266E-02 -5.0849E-03 4.4920E-04
S14 -6.6670E-02 4.6860E-03 2.7643E-03 -4.1669E-03 2.3867E-03 -4.8171E-04 -9.8569E-05 5.6709E-05 -6.2594E-06
Table 23
Table 24 shows the effective focal lengths f1 to f7 of the respective lenses in example 8, the total effective focal length f of the optical imaging lens group, the total optical length TTL, half the diagonal length ImgH of the effective pixel region on the imaging surface S17, and the maximum half field angle HFOV.
f1(mm) -180.09 f7(mm) -5069.86
f2(mm) 2.82 f(mm) 5.80
f3(mm) 10.38 TTL(mm) 5.78
f4(mm) -2.98 ImgH(mm) 2.29
f5(mm) 5.06 HFOV(°) 27.7
f6(mm) -3.38
Table 24
Fig. 16A shows an on-axis chromatic aberration curve for the optical imaging lens set of example 8, which indicates the deviation of the converging focus of light rays of different wavelengths after passing through the lens. Fig. 16B shows an astigmatism curve of the optical imaging lens group of example 8, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 16C shows a distortion curve of the optical imaging lens set of example 8, which represents distortion magnitude values corresponding to different image heights. Fig. 16D shows a magnification chromatic aberration curve of the optical imaging lens group of embodiment 8, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 16A to 16D, the optical imaging lens set in embodiment 8 can achieve good imaging quality.
Example 9
An optical imaging lens group according to embodiment 9 of the present application is described below with reference to fig. 17 to 18D. Fig. 17 shows a schematic structural view of an optical imaging lens group according to embodiment 9 of the present application.
As shown in fig. 17, the optical imaging lens group according to the exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an optical filter E8, and an imaging surface S17.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is convex. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave, and an image-side surface S12 thereof is concave. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is concave, and an image-side surface S14 thereof is convex. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this embodiment, the lenses E1-E7 are all plastic lenses.
Table 25 shows the surface types, radii of curvature, thicknesses, materials, and conic coefficients of the respective lenses of the optical imaging lens group of example 9, wherein the radii of curvature and thicknesses are each in millimeters (mm).
Table 25
As is clear from table 25, in example 9, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 26 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 9, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 1.2499E-02 -4.2442E-02 2.3062E-01 -6.3094E-01 1.0527E+00 -1.0823E+00 6.7294E-01 -2.3214E-01 3.4216E-02
S4 -4.7839E-04 1.8863E-01 -9.2927E-01 2.2207E+00 -3.2641E+00 3.1066E+00 -1.8813E+00 6.6349E-01 -1.0350E-01
S5 1.1163E-02 3.1329E-01 -1.8071E+00 4.3948E+00 -6.1452E+00 5.2328E+00 -2.6502E+00 7.3039E-01 -8.4335E-02
S6 2.4709E-02 5.0537E-01 -3.5625E+00 1.1584E+01 -2.1640E+01 2.4470E+01 -1.6439E+01 5.9823E+00 -8.9369E-01
S7 -8.0819E-02 4.8945E-01 -2.7691E+00 1.0480E+01 -2.3857E+01 3.3079E+01 -2.7501E+01 1.2611E+01 -2.4485E+00
S8 -4.4419E-02 4.9931E-01 -3.6011E+00 1.8896E+01 -6.0924E+01 1.2088E+02 -1.4452E+02 9.5545E+01 -2.6769E+01
S9 -1.3826E-01 -6.1669E-01 6.5698E+00 -4.3135E+01 1.7341E+02 -4.3451E+02 6.5837E+02 -5.5161E+02 1.9583E+02
S10 -4.8156E-01 1.4753E+00 -3.8992E+00 1.0438E+01 -2.3773E+01 3.7037E+01 -3.4694E+01 1.7576E+01 -3.7447E+00
S11 -6.7536E-01 1.6965E+00 -4.1514E+00 1.2245E+01 -3.1080E+01 5.1429E+01 -4.9717E+01 2.5666E+01 -5.5267E+00
S12 -7.0091E-02 -4.9592E-01 2.3026E+00 -5.4861E+00 8.1158E+00 -7.6161E+00 4.4214E+00 -1.4448E+00 2.0208E-01
S13 -8.6269E-02 -1.3524E-02 3.1818E-02 -3.1073E-02 8.0357E-03 1.1372E-02 -1.3214E-02 5.7864E-03 -9.1628E-04
S14 -6.7056E-02 -2.1357E-02 5.5763E-02 -7.3711E-02 6.1730E-02 -3.3424E-02 1.1232E-02 -2.1373E-03 1.7685E-04
Table 26
Table 27 shows the effective focal lengths f1 to f7 of the respective lenses in example 9, the total effective focal length f of the optical imaging lens group, the total optical length TTL, half the diagonal length ImgH of the effective pixel region on the imaging surface S17, and the maximum half field angle HFOV.
f1(mm) -155.10 f7(mm) 31.42
f2(mm) 2.86 f(mm) 5.80
f3(mm) 9.82 TTL(mm) 5.78
f4(mm) -3.86 ImgH(mm) 2.29
f5(mm) -1000.02 HFOV(°) 27.8
f6(mm) -5.04
Table 27
Fig. 18A shows an on-axis chromatic aberration curve of the optical imaging lens set of example 9, which represents the deviation of the converging focus of light rays of different wavelengths after passing through the lens. Fig. 18B shows an astigmatism curve of the optical imaging lens group of example 9, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 18C shows a distortion curve of the optical imaging lens set of example 9, which represents distortion magnitude values corresponding to different image heights. Fig. 18D shows a magnification chromatic aberration curve of the optical imaging lens group of embodiment 9, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 18A to 18D, the optical imaging lens set in embodiment 9 can achieve good imaging quality.
Example 10
An optical imaging lens group according to embodiment 10 of the present application is described below with reference to fig. 19 to 20D. Fig. 19 shows a schematic structural view of an optical imaging lens group according to embodiment 10 of the present application.
As shown in fig. 19, the optical imaging lens group according to the exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an optical filter E8, and an imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is convex. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave, and an image-side surface S12 thereof is concave. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is convex. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this embodiment, the lenses E1-E7 are all plastic lenses.
Table 28 shows the surface types, radii of curvature, thicknesses, materials, and conic coefficients of the lenses of the optical imaging lens group of example 10, wherein the radii of curvature and thicknesses are each in millimeters (mm).
Table 28
As can be seen from table 28, in embodiment 10, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 29 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 10, where each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Table 29
Table 30 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 10, the total effective focal length f of the optical imaging lens group, the total optical length TTL, half the diagonal length ImgH of the effective pixel area on the imaging surface S17, and the maximum half field angle HFOV.
f1(mm) 899.80 f7(mm) 29.10
f2(mm) 2.82 f(mm) 5.80
f3(mm) 10.66 TTL(mm) 5.78
f4(mm) -2.88 ImgH(mm) 2.29
f5(mm) 5.24 HFOV(°) 27.8
f6(mm) -3.21
Table 30
Fig. 20A shows an on-axis chromatic aberration curve of the optical imaging lens set of embodiment 10, which represents the deviation of the converging focus of light rays of different wavelengths after passing through the lens. Fig. 20B shows an astigmatism curve of the optical imaging lens group of embodiment 10, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 20C shows a distortion curve of the optical imaging lens set of example 10, which represents distortion magnitude values corresponding to different image heights. Fig. 20D shows a magnification chromatic aberration curve of the optical imaging lens group of embodiment 10, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 20A to 20D, the optical imaging lens set in embodiment 10 can achieve good imaging quality.
In summary, examples 1 to 10 satisfy the relationships shown in table 31, respectively.
Table 31
The application also provides an imaging device, wherein the electronic photosensitive element can be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be a stand alone imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a cell phone. The imaging device is equipped with the optical imaging lens group described above.
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.

Claims (8)

1. The optical imaging lens group sequentially comprises, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens having optical power, characterized in that,
The object side surface of the first lens is a concave surface, and the image side surface is a convex surface;
the second lens has positive optical power;
the fourth lens has negative focal power, and the object side surface and the image side surface of the fourth lens are concave surfaces;
the sixth lens has negative focal power;
the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are all made of plastic;
the number of lenses of the optical imaging lens group with focal power is seven;
at most one of the third, fifth, and seventh lenses has negative optical power;
the curvature radius R7 of the object side surface of the fourth lens and the curvature radius R8 of the image side surface of the fourth lens meet the condition that R7/R8 is less than or equal to-1.5 and less than or equal to-0.5;
the thickness ET3 of the edge of the third lens, the thickness CT3 of the center of the third lens on the optical axis, the thickness ET7 of the edge of the seventh lens and the thickness CT7 of the center of the seventh lens on the optical axis satisfy 0.1 < (ET 3X CT 3)/(ET 7X CT 7) < 0.4; and
the maximum half field angle HFOV of the set of optical imaging lenses satisfies 25 DEG to 35 deg.
2. The optical imaging lens set of claim 1, wherein a total effective focal length f of the optical imaging lens set and an effective focal length f4 of the fourth lens satisfy-2.5 < f/f4 +.1.5.
3. The optical imaging lens set according to claim 1, wherein a radius of curvature R1 of an object side surface of the first lens, a radius of curvature R2 of an image side surface of the first lens, a radius of curvature R3 of an object side surface of the second lens, and a radius of curvature R4 of an image side surface of the second lens satisfy-0.5 < (r1+r2)/(r3+r4) < 2.
4. The optical imaging lens assembly of claim 1, wherein a center thickness CT2 of the second lens element on the optical axis and a center thickness CT7 of the seventh lens element on the optical axis satisfy 1 < CT2/CT7 < 2.
5. The optical imaging lens assembly of claim 4, wherein a distance SAG21 on the optical axis from an intersection of the second lens object side and the optical axis to an effective radius vertex of the second lens object side and a distance SAG72 on the optical axis from an intersection of the seventh lens image side and the optical axis to an effective radius vertex of the seventh lens image side satisfy-2 < SAG21/SAG72 < -1.
6. The optical imaging lens set of claim 1, wherein a combined focal length f34 of the third lens and the fourth lens and a combined focal length f56 of the fifth lens and the sixth lens satisfy 0.2 < f34/f56 < 1.5.
7. The optical imaging lens set according to claim 1, wherein a maximum effective radius DT11 of an object side of the first lens and a maximum effective radius DT51 of an object side of the fifth lens satisfy 2 < DT11/DT51 < 2.5.
8. The optical imaging lens set of any of claims 1 to 7, wherein a combined focal length f1234 of the first, second, third and fourth lenses and a half of a diagonal length ImgH of an effective pixel area on an imaging face of the optical imaging lens set satisfy 1.5 < f1234/ImgH < 2.5.
CN201810917255.2A 2018-08-13 2018-08-13 Optical Imaging Lens Group Active CN108919465B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810917255.2A CN108919465B (en) 2018-08-13 2018-08-13 Optical Imaging Lens Group

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810917255.2A CN108919465B (en) 2018-08-13 2018-08-13 Optical Imaging Lens Group

Publications (2)

Publication Number Publication Date
CN108919465A CN108919465A (en) 2018-11-30
CN108919465B true CN108919465B (en) 2023-08-25

Family

ID=64404512

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810917255.2A Active CN108919465B (en) 2018-08-13 2018-08-13 Optical Imaging Lens Group

Country Status (1)

Country Link
CN (1) CN108919465B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109752826B (en) * 2019-03-26 2024-04-12 浙江舜宇光学有限公司 Optical imaging lens
TWI712830B (en) 2019-12-25 2020-12-11 大立光電股份有限公司 Photographing optical lens assembly, image capturing unit and electronic device
CN118642255A (en) * 2024-08-12 2024-09-13 江西联益光学有限公司 Optical lens

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109031628A (en) * 2018-10-29 2018-12-18 浙江舜宇光学有限公司 Optical imagery eyeglass group
CN208636555U (en) * 2018-08-13 2019-03-22 浙江舜宇光学有限公司 Optical imagery eyeglass group

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108508581B (en) * 2018-04-12 2023-07-07 浙江舜宇光学有限公司 Optical imaging system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208636555U (en) * 2018-08-13 2019-03-22 浙江舜宇光学有限公司 Optical imagery eyeglass group
CN109031628A (en) * 2018-10-29 2018-12-18 浙江舜宇光学有限公司 Optical imagery eyeglass group

Also Published As

Publication number Publication date
CN108919465A (en) 2018-11-30

Similar Documents

Publication Publication Date Title
CN108681040B (en) Optical imaging lens group
CN109343203B (en) Optical imaging lens group
CN110007444B (en) Optical imaging lens
CN108919464B (en) Optical imaging lens group
CN108469669B (en) Image pickup lens
CN114137694B (en) Optical imaging lens
CN110471164B (en) Optical imaging lens
CN110632742B (en) Optical imaging lens
CN110456481B (en) Optical imaging lens
CN109031628B (en) Optical imaging lens group
CN114114656B (en) Optical imaging lens
CN114047607B (en) Optical imaging lens
CN108983399B (en) Optical imaging lens group
CN110376710B (en) Optical imaging system
CN109239891B (en) Optical imaging lens group
CN108761730B (en) Image pickup lens
CN108919463B (en) Optical imaging lens
CN109254385B (en) Optical imaging lens
CN110221402B (en) Optical imaging lens
CN108873254B (en) Optical imaging system
CN109298514B (en) Optical imaging lens group
CN109239894B (en) Optical imaging system
CN117706735A (en) Optical imaging lens
CN108490587B (en) Imaging lens
CN110780422A (en) Optical imaging lens

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant