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CN216083231U - 54dmm large-aperture high-definition lens - Google Patents

54dmm large-aperture high-definition lens Download PDF

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CN216083231U
CN216083231U CN202120924690.5U CN202120924690U CN216083231U CN 216083231 U CN216083231 U CN 216083231U CN 202120924690 U CN202120924690 U CN 202120924690U CN 216083231 U CN216083231 U CN 216083231U
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lens
positive
meniscus lens
convex
meniscus
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罗杰
黄锦煖
戴敏林
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Fujian Forecam Tiantong Optics Co Ltd
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Fujian Forecam Tiantong Optics Co Ltd
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Abstract

The utility model relates to a 54dmm large-aperture high-definition lens which comprises a first negative meniscus lens, a second positive meniscus lens, a third plano-convex positive lens, a diaphragm, a fourth negative meniscus lens, a fifth double-convex positive lens and a sixth positive meniscus lens which are sequentially arranged from front to back along an incident light path, wherein the fourth negative meniscus lens and the fifth double-convex positive lens are mutually glued to form a first gluing group.

Description

54dmm large-aperture high-definition lens
Technical Field
The utility model relates to a 54dmm large-aperture high-definition lens.
Background
At present, scientific technology is changing day by day, optical lenses are also developing towards the characteristics such as full spectrum, large image plane, high resolution and the like, the existing lenses are difficult to meet market demands in terms of pixels, performance and cost, and especially the vehicle-mounted front-view lens in the market at present has a monitoring distance within 100 meters and cannot clearly present monitoring images at a longer distance.
Disclosure of Invention
Aiming at the problems of the existing lens, the utility model provides a 54dmm large-aperture high-definition lens.
The technical scheme adopted by the utility model for solving the technical problems is that a 54dmm large-aperture high-definition lens comprises the following components: the optical lens comprises a first negative meniscus lens, a second positive meniscus lens, a third plano-convex positive lens, a diaphragm, a fourth negative meniscus lens, a fifth double-convex positive lens and a sixth positive meniscus lens which are sequentially arranged from front to back along an incident light path.
Further, the fourth negative meniscus lens and the fifth double convex positive lens are mutually glued to form a first glue combination.
Further, the air space between the first negative meniscus lens and the second positive meniscus lens is 3.4-4.3 mm, the air space between the second positive meniscus lens and the third positive plano-convex lens is 0-0.6 mm, the air space between the third positive plano-convex lens and the diaphragm is 0.8-1.7 mm, the air space between the diaphragm and the fourth negative meniscus lens is 0-0.2 mm, and the air space between the fifth double convex positive lens and the sixth positive meniscus lens is 0.3-0.5 mm.
Further, the focal length of the optical system is f, and the focal lengths of the first negative meniscus lens, the second positive meniscus lens, the third plano-convex positive lens, the fourth negative meniscus lens, the fifth double-convex positive lens and the sixth positive meniscus lens are respectively f1、f2、f3、f4,f5,f6Wherein f1、f2、f3、f4、f5、f6And f satisfy the following ratio: -2.7<f1/f<-2.3,6.7<f2/f<7.0,1.6<f3/f<2.1,-1.9<f4/f <-1.4,1.2<f5/f<1.6,2.2<f6/f<2.6。
Further, the first negative meniscus lens satisfies the relationship: n is a radical ofd≥1.7,VdNot less than 40; the second positive meniscus lens satisfies the relation: n is a radical ofd≥1.5,VdNot less than 50; the third plano-convex positive lens satisfies the relation: n is a radical ofd≥1.8,VdLess than or equal to 40; the fourth negative meniscus lens satisfies the relation: n is a radical ofd≥1.8,VdLess than or equal to 40; the fifth biconvex positive lens satisfies the relation: n is a radical ofd≤1.6,VdNot less than 50; the sixth positive meniscus lens satisfies the relation: n is a radical ofd≥1.5,VdNot less than 50; wherein N isdIs refractive index, VdAbbe constant.
Further, the first negative meniscus lens and the second positive meniscus lens are aspheric lenses, and the aspheric curve equation expression is as follows:
Figure DEST_PATH_GDA0003454160860000021
wherein Z is the distance from the aspheric surface to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface; k is a conic constant; A. b, C, D, E, F are all high order term coefficients.
Further, the total optical length TTL of the optical system and the focal length F of the optical system satisfy: TTL/F is less than or equal to 16.
Compared with the prior art, the utility model has the following beneficial effects: the structure is simple, the design is reasonable, the remote forming image quality is clear, and the requirement of eight million pixels for shooting is completely met.
Drawings
The utility model is further described with reference to the following figures.
FIG. 1 is a schematic diagram of an optical configuration of an embodiment of the present invention;
FIG. 2 is a graph of the visible light MTF for an embodiment of the present invention;
FIG. 3 is a graph of axial chromatic aberration for an embodiment of the present invention;
fig. 4 is a lateral chromatic aberration plot of an embodiment of the present invention.
In the figure: 1-a first negative meniscus lens; 2-a second positive meniscus lens; 3-a third plano-convex positive lens; 4-a diaphragm; 5-a fourth negative meniscus lens; 6-a fifth biconvex positive lens; 7-a sixth positive meniscus lens; 8-an optical filter; 9-protective glass; 10-imaging plane.
Detailed Description
The utility model is further described with reference to the following figures and detailed description.
As shown in fig. 1 to 4, a 54dmm large aperture high definition lens: the optical lens comprises a first negative meniscus lens 1, a second positive meniscus lens 2, a third convex meniscus lens 3, a diaphragm 4, a fourth negative meniscus lens 5, a fifth double convex positive lens 6 and a sixth positive meniscus lens 7 which are sequentially arranged from front to back along an incident light path, wherein all the lenses are made of glass materials;
the object side surface of the first negative meniscus lens is a convex surface, and the image side surface of the first negative meniscus lens is a concave surface; the object side surface of the second meniscus positive lens is a concave surface, and the image side surface of the second meniscus positive lens is a convex surface; the object side surface of the third plano-convex positive lens is a convex surface, and the image side surface of the third plano-convex positive lens is a plane; the object side surface of the fourth negative meniscus lens is a convex surface, and the image side surface of the fourth negative meniscus lens is a concave surface; the object side surface and the image side surface of the fifth biconvex positive lens are convex surfaces; the object side surface of the sixth positive meniscus lens is a convex surface, and the image side surface of the sixth positive meniscus lens is a concave surface; a protective glass is provided on the rear side of the sixth lens L6.
In this embodiment, the fourth negative meniscus lens and the fifth double convex positive lens are cemented with each other to form a first cemented group.
In this embodiment, an air interval between the first negative meniscus lens and the second positive meniscus lens is 3.4 to 4.3mm, an air interval between the second positive meniscus lens and the third positive plano-convex lens is 0 to 0.6mm, an air interval between the third positive plano-convex lens and the diaphragm is 0.8 to 1.7mm, an air interval between the diaphragm and the fourth negative meniscus lens is 0 to 0.2mm, and an air interval between the fifth double convex positive meniscus lens and the sixth positive meniscus lens is 0.3 to 0.5 mm.
In this embodiment, the focal length of the optical system is f, and the focal lengths of the first negative meniscus lens, the second positive meniscus lens, the third plano-convex positive lens, the fourth negative meniscus lens, the fifth double-convex positive lens and the sixth positive meniscus lens are respectively f1、f2、f3、f4,f5,f6Wherein f1、f2、f3、f4、f5、f6And f satisfy the following ratio: -2.7<f1/f<-2.3,6.7<f2/f<7.0,1.6<f3/f<2.1,-1.9<f4 /f<-1.4,1.2<f5/f<1.6,2.2<f6/f<2.6。
In this embodiment, the first negative meniscus lens satisfies the following relationship: n is a radical ofd≥1.7,VdNot less than 40; the second positive meniscus lens satisfies the relation: n is a radical ofd≥1.5,VdNot less than 50; the third plano-convex positive lens satisfies the relation: n is a radical ofd≥1.8,VdLess than or equal to 40; the fourth negative meniscus lens satisfies the relation: n is a radical ofd≥ 1.8,VdLess than or equal to 40; the fifth biconvex positive lens satisfies the relation: n is a radical ofd≤1.6,VdNot less than 50; the sixth positive meniscus lens satisfies the relation: n is a radical ofd≥1.5,VdNot less than 50; wherein N isdIs refractive index, VdAbbe constant.
In this embodiment, the first negative meniscus lens and the second positive meniscus lens are aspheric lenses, and the aspheric curve equation expression is as follows:
Figure DEST_PATH_GDA0003454160860000041
wherein Z is the distance from the aspheric surface to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic constant; A. b, C, D, E, F are all high order term coefficients.
TABLE 2 aspherical lens parameters
Figure DEST_PATH_GDA0003454160860000042
In this embodiment, the total optical length TTL of the optical system and the focal length F of the optical system satisfy: TTL/F is less than or equal to 16.
TABLE 1 radius of curvature R, thickness d, refractive index N of each lensdAnd Abbe number Vd
Figure DEST_PATH_GDA0003454160860000043
Figure DEST_PATH_GDA0003454160860000051
An imaging method of a 54dmm large-aperture high-definition lens comprises the following steps: the light rays sequentially pass through a first negative meniscus lens, a second positive meniscus lens, a third plano-convex positive lens, a diaphragm, a fourth negative meniscus lens, a fifth double-convex positive lens, a sixth positive meniscus lens, an optical filter 8 and protective glass 9 from an object space and then reach an imaging plane 10 to be imaged.
In this embodiment, the technical indexes of the optical system are as follows:
(1) focal length: EFFL 5.38 mm; (2) the aperture F is 1.60; (3) the field angle: 2w is more than or equal to 100 degrees; (4) distortion of | < 26% of TV; (5) the diameter of the imaging circle is larger than phi 6.8; (6) the working wave band is as follows: 420-650 nm; (7) the total optical length TTL is less than or equal to 26mm, and the optical back intercept BFL is more than or equal to 3 mm; (8) the lens is suitable for eight million-pixel CCD or CMOS cameras.
As can be seen from FIG. 2, the MTF of the optical system in the visible light band is well-behaved, the MTF value of the edge field at the spatial frequency of 120pl/mm is greater than 0.4, and the MTF value of the center field at the spatial frequency of 120pl/mm is greater than 0.6, which can meet the 4K resolution requirement. Fig. 3 and 4 are graphs of axial chromatic aberration and lateral chromatic aberration of the optical system. As can be seen from FIG. 3, the blue light of 420nm waveband is also included in the evaluation system of the optical system, so that the purple-fringing chromatic aberration is better corrected, and the purpose of improving the image quality is achieved. As can be seen from FIG. 4, in the 420-650 nm band, the lateral chromatic aberration is 4.5um, which is smaller than the size of two pixels. In conclusion, the optical system has excellent imaging quality and completely meets the requirement of eight million pixels for image pickup.
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.
If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.
If the utility model discloses or relates to parts or structures which are fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, the orientations or positional relationships indicated for indicating the positional relationships such as "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, applied in any of the technical aspects of the present disclosure described above are based on the orientations or positional relationships shown in the drawings and are only for convenience of describing the present disclosure, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as limiting the present disclosure, and the terms used for indicating the shapes applied in any of the technical aspects of the present disclosure described above are meant to include shapes similar, analogous or approximate thereto unless otherwise stated.
Any part provided by the utility model can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the utility model or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the utility model as defined by the appended claims.

Claims (7)

1. The utility model provides a 54dmm large aperture high definition camera lens which characterized in that: the optical lens comprises a first negative meniscus lens, a second positive meniscus lens, a third plano-convex positive lens, a diaphragm, a fourth negative meniscus lens, a fifth double-convex positive lens and a sixth positive meniscus lens which are sequentially arranged from front to back along an incident light path.
2. A 54dmm large-aperture high-definition lens according to claim 1, wherein: and the fourth negative meniscus lens and the fifth double-convex positive lens are mutually glued to form a first gluing set.
3. A 54dmm large-aperture high-definition lens according to claim 1, wherein: the air interval between first meniscus negative lens and the positive lens of second meniscus is 3.4 ~ 4.3mm, the air interval between the positive lens of second meniscus and the positive lens of third plano-convex is 0 ~ 0.6mm, the air interval between the positive lens of third plano-convex and the diaphragm is 0.8 ~ 1.7mm, the air interval between diaphragm and the negative lens of fourth meniscus is 0 ~ 0.2mm, the air interval between the positive lens of fifth biconvex and the positive lens of sixth meniscus is 0.3 ~ 0.5 mm.
4. A 54dmm large-aperture high-definition lens according to claim 1, wherein: the focal length of the integral optical system is f, and the focal lengths of the first negative meniscus lens, the second positive meniscus lens, the third plano-convex positive lens, the fourth negative meniscus lens, the fifth double-convex positive lens and the sixth positive meniscus lens are respectively f1、f2、f3、f4,f5,f6Wherein f1、f2、f3、f4、f5、f6And f satisfy the following ratio: -2.7<f1/f<-2.3,6.7<f2/f<7.0,1.6<f3/f<2.1,-1.9<f4/f<-1.4,1.2<f5/f<1.6,2.2<f6/f<2.6。
5. A 54dmm large-aperture high-definition lens according to claim 1, wherein: the first negative meniscus lens satisfies the relation: n is a radical ofd≥1.7,VdNot less than 40; the second positive meniscus lens satisfies the relation: n is a radical ofd≥1.5,VdNot less than 50; the third plano-convex positive lens satisfies the relation: n is a radical ofd≥1.8,VdLess than or equal to 40; the fourth negative meniscus lens satisfies the relation: n is a radical ofd≥1.8,VdLess than or equal to 40; the fifth biconvex positive lens satisfies the relation: n is a radical ofd≤1.6,VdNot less than 50; the sixth positive meniscus lens satisfies the relation: n is a radical ofd≥1.5,VdNot less than 50; wherein N isdIs refractive index, VdAbbe constant.
6. A 54dmm large-aperture high-definition lens according to claim 1, wherein: the first negative meniscus lens and the second positive meniscus lens are aspheric lenses, and the expression of an aspheric curve equation is as follows:
Figure DEST_PATH_FDA0003454160850000011
wherein Z is the distance from the aspheric surface to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface; k is a conic constant; A. b, C, D, E, F are all high order term coefficients.
7. A 54dmm large-aperture high-definition lens according to claim 1, wherein: the total optical length TTL of the whole optical system and the focal length F of the optical system meet the following conditions: TTL/F is less than or equal to 16.
CN202120924690.5U 2021-04-30 2021-04-30 54dmm large-aperture high-definition lens Active CN216083231U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113253424A (en) * 2021-04-30 2021-08-13 福建福光天瞳光学有限公司 5.4mm large-aperture high-definition lens and imaging method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113253424A (en) * 2021-04-30 2021-08-13 福建福光天瞳光学有限公司 5.4mm large-aperture high-definition lens and imaging method thereof
CN113253424B (en) * 2021-04-30 2024-11-08 福建福光天瞳光学有限公司 5.4Mm large-aperture high-definition lens and imaging method thereof

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