CN211786333U

CN211786333U - Optical system, camera module and electronic equipment

Info

Publication number: CN211786333U
Application number: CN202020541525.7U
Authority: CN
Inventors: 谢晗; 刘彬彬; 李明; 邹海荣
Original assignee: OFilm Tech Co Ltd
Current assignee: Jiangxi Jingchao Optical Co Ltd
Priority date: 2020-04-14
Filing date: 2020-04-14
Publication date: 2020-10-27
Anticipated expiration: 2030-04-14

Abstract

The utility model relates to an optical system, module and electronic equipment make a video recording. The optical system includes: a diaphragm; a first lens element with positive refractive power having a convex object-side surface at paraxial region; a second lens; a third lens; a fourth lens element with positive refractive power having a concave object-side surface and a convex image-side surface; a fifth lens element having a concave image-side surface at a paraxial region; the sixth lens element with negative refractive power has a convex object-side surface at paraxial region,the image side surface is concave at the paraxial position; the system satisfies the relationship: 1mm^‑1＜tanω/D11＜2mm^‑1(ii) a F123/f456 is more than 0 and less than 1.0. Above, optical system can realize little head design, when being used for equipment as leading camera lens, can effectively reduce the trompil under the screen of equipment in order to improve the screen to account for, can also make equipment possess big visual angle and high analytic camera performance in addition.

Description

Optical system, camera module and electronic equipment

Technical Field

The utility model relates to a field of making a video recording especially relates to an optical system, module and electronic equipment make a video recording.

Background

Since the camera lens is applied to electronic devices such as smart phones and tablet computers, the shooting performance of the device also changes with the increase of high-quality shooting requirements of users. The shooting effect of the camera lens is also widely concerned by the market. Especially, in the case that the screen occupation ratio of the device is gradually increased, how to reduce the under-screen opening of the device to increase the screen occupation ratio and maintain good image capturing performance (such as large viewing angle and high resolution) has become a major concern of the market.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide an optical system, an image pickup module, and an electronic apparatus, which are directed to the problem of how to reduce the opening under the screen of the apparatus while maintaining good image pickup performance.

An optical system comprising, in order from an object side to an image side:

a diaphragm;

a first lens element with positive refractive power having a convex object-side surface at paraxial region;

a second lens element with refractive power;

a third lens element with refractive power;

a fourth lens element with positive refractive power having a concave object-side surface and a convex image-side surface;

a fifth lens element with refractive power having a concave image-side surface at a paraxial region;

a sixth lens element with negative refractive power having a convex object-side surface and a concave image-side surface;

the optical system satisfies the following relationship:

1mm^-1＜tanω/D11＜2mm^-1(ii) a And

0＜f123/f456＜1.0；

where ω is a half of a maximum field angle of the optical system, D11 is a maximum effective half aperture of an object-side surface of the first lens, f123 is a combined focal length of the first lens, the second lens, and the third lens, f456 is a combined focal length of the fourth lens, the fifth lens, and the sixth lens, ω is a unit of degree, and D11 is a unit of millimeter.

When the optical system meets the conditions of the diaphragm, the lens configuration and the relation formula of tan omega/D11, the front port diameter of the optical system can be sufficiently compressed, so that the appearance design of a small head is facilitated, and the visual angle range of the system can be expanded, so that the optical system can obtain more comprehensive scenes. Meanwhile, when the optical system meets the relation condition of f123/f456, the lens group formed by the first lens, the second lens and the third lens can provide most of positive refractive power for the optical system, so that incident light can be better converged and imaged, the total length of the system is shortened, and in addition, the system analysis capability can be improved when the relation is met. In the above, the optical system can realize a small head design by reducing the aperture of the front end, so that when the optical system is applied to equipment as a front lens, the opening under the screen of the equipment can be effectively reduced to improve the screen occupation ratio, and in addition, the equipment can have a large viewing angle and high-resolution shooting performance.

In one embodiment, the optical system satisfies the following relationship:

3.4＜D62/D11＜5.1；

wherein D62 is the maximum effective half aperture of the image-side surface of the sixth lens element. When the relation is satisfied, the small-caliber design of the first lens in the system is facilitated, so that the system has the appearance structure of a small head. When the aperture of the sixth lens is larger than the upper limit of the relation, the aperture of the sixth lens is too large, so that the size of the whole system (or called a lens) is too large; when the aperture of the first lens is less than the lower limit of the relational expression, the aperture of the first lens cannot be sufficiently compressed, which is not favorable for the small head design of the system.

In one embodiment, the optical system satisfies the following relationship:

0.40deg^-1＜10*FNO/ω＜0.52deg^-1；

wherein FNO is an f-number of the optical system. The smaller the f-number, the larger the entrance pupil aperture of the system at the same focal length, and the larger the amount of light entering, so that the overall image of the system becomes brighter and clearer, but at the same time, it becomes difficult to increase the field angle of the system. When the above relationship is satisfied, the optical system can have both high light-entering amount and wide viewing angle characteristics.

In one embodiment, the optical system satisfies the following relationship:

0.7＜ImgH/TL＜0.9；

wherein ImgH is a half of a diagonal length of an effective imaging area of an imaging surface of the optical system, and TL is a distance on an optical axis from an object-side surface of the first lens to the imaging surface of the optical system. When the above relationship is satisfied, the total length of the optical system can be effectively compressed, thereby contributing to a miniaturized design.

In one embodiment, at least one of the second lens element and the third lens element has negative refractive power, and the optical system satisfies the following relationship:

1＜(V2+V3+V5)/V1＜2；

wherein V1 is an abbe number of the first lens, V2 is an abbe number of the second lens, V3 is an abbe number of the third lens, and V5 is an abbe number of the fifth lens. The second lens element and/or the third lens element with negative refractive power can correct the positive spherical aberration of the first lens element, thereby improving the imaging quality of the system. The smaller the abbe number, the stronger the ability to correct chromatic aberration.

In one embodiment, the optical system satisfies the following relationship:

-20＜(R51+R52)/(R51-R52)＜1；

wherein, R51 is a curvature radius of an object side surface of the fifth lens at an optical axis, and R52 is a curvature radius of an image side surface of the fifth lens at the optical axis. When the relationship is satisfied, the surface types of the object side surface and the image side surface of the fifth lens can be reasonably optimized, so that the aberration and the field curvature of the system can be favorably corrected, and the imaging quality is improved.

In one embodiment, the optical system satisfies the following relationship:

1＜f1/f＜2；

wherein f1 is the effective focal length of the first lens, and f is the total effective focal length of the optical system. The first lens provides positive refractive power for the system, and when the relation is satisfied, the field curvature of the system can be effectively corrected, and the length of the system can be controlled.

In one embodiment, the optical system satisfies the following relationship:

0.7＜SAG51/SAG61＜1.6；

wherein SAG51 is the maximum saggital height of the object-side surface of the fifth lens and SAG61 is the maximum saggital height of the object-side surface of the sixth lens. When the relationship is satisfied, the object side surface of the fifth lens and the object side surface of the sixth lens keep similar curvature, so that the fifth lens and the sixth lens can be matched more closely, and the compression of the system length is facilitated.

In one embodiment, the optical system satisfies the following relationship:

0.39＜ΣAT/ΣCT＜0.56；

wherein Σ AT is the sum of the air spaces on the optical axis of each adjacent lens in the optical system, and Σ CT is the sum of the thicknesses on the optical axis of each lens in the optical system. When satisfying above-mentioned relation, can rationally optimize the spacing distance between each adjacent lens, when guaranteeing that the thickness of lens is favorable to the machine-shaping, the air gap between the adjacent lens of compression that can be more abundant to satisfy the miniaturized design trend of camera lens. When the thickness of the lens is less than the lower limit of the above relational expression, the thickness of the lens is too thin, which is disadvantageous for molding the lens, or the air gap between adjacent lenses is too small, which is insufficient in the degree of freedom of the change of the lens shape, and thus, the system aberration cannot be corrected well; when the value is higher than the upper limit of the above relation, the air gap between the lenses is too large, which is not favorable for ultra-thin design.

An image capturing module includes a photosensitive element and the optical system of any of the above embodiments, wherein the photosensitive element is disposed on an image side of the optical system. By adopting the optical system, the camera module also has the characteristics of small head, large visual angle and high resolution.

An electronic device comprises a fixing piece and the camera module, wherein the camera module is arranged on the fixing piece. When adopting above-mentioned module of making a video recording as the leading module of making a video recording of equipment, trompil is occupied than in order to improve the screen under the screen that can effectively reduce equipment, can also make equipment possess big visual angle and high-resolution performance of making a video recording in addition.

Drawings

Fig. 1 is a schematic structural diagram of an optical system according to a first embodiment of the present application;

FIG. 2 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system in the first embodiment;

fig. 3 is a schematic structural diagram of an optical system according to a second embodiment of the present application;

FIG. 4 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system in the second embodiment;

fig. 5 is a schematic structural diagram of an optical system according to a third embodiment of the present application;

FIG. 6 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of an optical system in a third embodiment;

fig. 7 is a schematic structural diagram of an optical system according to a fourth embodiment of the present application;

FIG. 8 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of an optical system in a fourth embodiment;

fig. 9 is a schematic structural diagram of an optical system according to a fifth embodiment of the present application;

FIG. 10 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of an optical system in a fifth embodiment;

fig. 11 is a schematic structural diagram of an optical system according to a sixth embodiment of the present application;

FIG. 12 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of an optical system in a sixth embodiment;

fig. 13 is a schematic structural diagram of an optical system according to a seventh embodiment of the present application;

FIG. 14 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system in the seventh embodiment;

fig. 15 is a schematic view of a camera module according to an embodiment of the present application;

fig. 16 is a schematic view of an electronic device according to an embodiment of the present application.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, in some embodiments of the present application, the optical system 10 includes, in order from an object side to an image side, a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6, and each of the first lens L1 to the sixth lens L6 includes only one lens, so that the optical system 10 has a six-piece structure. The first lens element L1 with positive refractive power, the fourth lens element L4 with positive refractive power, and the sixth lens element L6 with negative refractive power. Each lens in the optical system 10 is arranged coaxially with the stop STO, that is, the optical axis of each lens and the center of the stop STO are located on the same straight line, which may be referred to as the optical axis of the optical system 10. The stop STO is disposed on the object side of the first lens L1, and the design with the stop STO in front is favorable for the miniaturization of the optical system 10. In the embodiment of the present application, when the system is referred to as including optical elements such as the stop STO and the first lens L1 in order from the object side to the image side, there may be an overlap between the stop STO and the projection of the first lens L1 on the optical axis of the system, that is, the object side S1 of the first lens L1 passes through the stop STO, or there may be no overlap.

The first lens L1 includes an object side surface S1 and an image side surface S2, the second lens L2 includes an object side surface S3 and an image side surface S4, the third lens L3 includes an object side surface S5 and an image side surface S6, the fourth lens L4 includes an object side surface S7 and an image side surface S8, the fifth lens L5 includes an object side surface S9 and an image side surface S10, and the sixth lens L6 includes an object side surface S11 and an image side surface S12. In addition, the optical system 10 further has a virtual image plane S13, and the image plane S13 is located on the image side of the sixth lens element L6. Generally, the image forming surface S13 of the optical system 10 coincides with the photosensitive surface of the photosensitive element, which may also be regarded as the image forming surface S13 of the optical system 10 for ease of understanding.

The object-side surface S1 of the first lens L1 is convex at the paraxial region; the object-side surface S7 of the fourth lens element L4 is concave, and the image-side surface S8 is convex; the image-side surface S10 of the fifth lens element L5 is concave at the paraxial region; the object-side surface S11 of the sixth lens element L6 is convex paraxially, and the image-side surface S12 is concave paraxially.

It should be noted that, in the present application, when a surface of a lens is described as being convex at a paraxial region (a central region of the surface), it is understood that a region of the surface of the lens near an optical axis is convex. When a surface of a lens is described as concave at the circumference, it is understood that the surface is concave near the region of maximum effective radius. For example, when the surface is convex at the paraxial region and also convex at the peripheral region, the shape of the surface from the center (optical axis) to the edge direction may be purely convex, or may first transition from a convex shape at the center to a concave shape and then become convex near the maximum effective radius. Here, the examples are only made for explaining the relationship between the optical axis and the circumference, and various shapes and structures (concave-convex relationship) of the surface are not completely embodied, but other situations in some embodiments can be derived according to the above examples, and are not described herein.

In the above embodiment, the object-side surface and the image-side surface of each lens in the optical system 10 are both aspheric surfaces, and the aspheric surface design enables the object-side surface and/or the image-side surface of each lens to have a more flexible design, increases the degree of freedom of lens design, improves the system resolution, enables the lens to well solve the problems of poor imaging, distorted field of view, narrow field of view and the like under the condition of small and thin lens, and thus enables the system to have good imaging quality without arranging too many lenses, and is helpful for shortening the length of the optical system 10. In some embodiments, the object-side surface and the image-side surface of each lens in the optical system 10 are both spherical surfaces, and the spherical lenses are simple in manufacturing process and low in production cost. In other embodiments, the object-side surfaces of some lenses in the optical system 10 are aspheric, the object-side surfaces of other lenses are spherical, the image-side surfaces of some lenses are aspheric, and the image-side surfaces of other lenses are aspheric. The specific configurations of the spherical surface and the aspherical surface in some embodiments are determined according to actual design requirements, and are not described herein.

The aberration of the system can be effectively eliminated by the cooperation of the spherical surface and the aspherical surface, so that the optical system 10 has good imaging quality, and simultaneously, the flexibility of lens design and assembly is improved, and the system is balanced between high imaging quality and low cost. It is to be noted that the specific shapes of the spherical and aspherical surfaces in the embodiments are not limited to those shown in the drawings, which are mainly for exemplary reference and are not drawn strictly to scale.

The surface shape of the aspheric surface can be calculated by referring to an aspheric surface formula:

z is the distance from a corresponding point on the aspheric surface to a plane tangent to the surface vertex, r is the distance from the corresponding point on the aspheric surface to the optical axis, c is the curvature of the aspheric surface vertex, k is a conical coefficient, and Ai is a coefficient corresponding to the ith high-order term in the aspheric surface type formula.

In the above embodiment, the object side surface S11 and the image side surface S12 of the sixth lens L6 both have an inflection point. In some embodiments, the object side S11 of the sixth lens L6 has an inflection point, and the image side S12 has no inflection point. In other embodiments, the object side S11 of the sixth lens L6 has no inflection point, and the image side S12 has an inflection point. The reverse curvature point design can correct distortion of a large viewing angle and restrain overlarge angle of incidence of marginal field rays to the imaging surface S13.

In the above embodiment, the material of each lens in the optical system 10 is plastic. In other embodiments, each lens of the optical system 10 is made of glass. The plastic lens can reduce the weight of the optical system 10 and the manufacturing cost, while the glass lens can withstand higher temperatures and has excellent optical effects. In other embodiments, the first lens L1 is made of glass, and the second lens L2 to the sixth lens L6 are made of plastic, so that the lens located at the object side in the optical system 10 is made of glass, and therefore, the glass lenses located at the object side have a good tolerance effect on extreme environments, and are not susceptible to aging and the like caused by the influence of the object side environment, so that when the optical system 10 is in the extreme environments such as exposure to high temperature, the optical performance and cost of the system can be well balanced by the structure. Of course, the configuration relationship of the lens materials in the optical system 10 is not limited to the above embodiments, any one of the lenses may be made of plastic or glass, and the specific configuration relationship is determined according to the actual design requirement, which is not described herein again.

In some embodiments, the optical system 10 includes an infrared filter L7, and the infrared filter L7 is disposed on the image side of the sixth lens L6 and is fixed relative to each lens in the optical system 10. The infrared filter L7 is used to filter out the infrared light and prevent the infrared light from reaching the imaging surface S13 of the system, thereby preventing the infrared light from interfering with normal imaging. An infrared filter L7 may be fitted with each lens as part of the optical system 10. For example, in some embodiments, each lens in the optical system 10 is mounted in a lens barrel, and the infrared filter L7 is mounted at the image end of the lens barrel. In other embodiments, the infrared filter L7 is not part of the optical system 10, and the infrared filter L7 may be installed between the optical system 10 and the photosensitive element when the optical system 10 and the photosensitive element are assembled into a camera module. In some embodiments, an infrared filter L7 may also be disposed on the object side of the first lens L1. In addition, in some embodiments, the infrared filter L7 may not be disposed, and an infrared filter is disposed on an object side surface or an image side surface of one of the first lens L1 to the sixth lens L6 to filter infrared light.

In some embodiments, the first lens element L1 may also include two or more lens elements, wherein the object-side surface of the lens element closest to the object side is the object-side surface S1 of the first lens element L1, and the image-side surface of the lens element closest to the image side is the image-side surface S2 of the first lens element L1. Accordingly, any one of the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 in some embodiments is not limited to the case where only one lens is included.

Further, in some embodiments, the optical system 10 also satisfies the following relationships:

1mm^-1＜tanω/D11＜2mm^-1；

0＜f123/f456＜1.0；

where ω is a half of the maximum angle of view of the optical system 10, D11 is the maximum effective half-diameter of the object-side surface S1 of the first lens L1, f123 is the combined focal length of the first lens L1, the second lens L2, and the third lens L3, f456 is the combined focal length of the fourth lens L4, the fifth lens L5, and the sixth lens L6, ω is degrees, and D11 is millimeters. It should be noted that the effective half bore may also be referred to as the effective radius. Specifically, tan ω/D11 in some embodiments can be 1.05, 1.1, 1.15, 1.2, 1.4, 1.5, 1.7, 1.8, 1.9, or 1.95. Specifically, f123/f456 in some embodiments may be 0.15, 0.2, 0.25, 0.3, 0.4, 0.5, 0.6, 0.65, or 0.68. When the optical system 10 satisfies the above-mentioned conditions of the diaphragm, the lens configuration and the relation equation regarding tan ω/D11, the front port diameter of the optical system 10 can be sufficiently compressed, thereby facilitating the appearance design of the small head, and further expanding the viewing angle range of the system, so that the optical system 10 can obtain a more comprehensive scene. Meanwhile, when the optical system 10 satisfies the relationship of f123/f456, the lens group consisting of the first lens element L1, the second lens element L2 and the third lens element L3 can provide most of the positive refractive power for the optical system 10, so that the incident light can be better focused and imaged, thereby shortening the total length of the system. In the above, the optical system 10 can realize a small head design by reducing the front end aperture, so that when the optical system 10 is applied to an apparatus as a front lens, the under-screen aperture of the apparatus can be effectively reduced to improve the screen ratio, and in addition, the apparatus can have a large viewing angle and high resolution image pickup performance.

D62/D11 is more than 3.4 and less than 5.1; where D62 is the maximum effective half aperture of the image-side surface S12 of the sixth lens element L6. Specifically, D62/D11 in some embodiments may be 3.5, 3.7, 4, 4.1, 4.5, 4.8, 4.9, or 5. Satisfying the above relationship, the small-caliber design of the first lens L1 in the system is facilitated, so that the system has a small-head exterior structure. Above the upper limit of the relation, the aperture of the sixth lens L6 is too large, which results in too large size of the whole system (or called lens); if the value is less than the lower limit of the relational expression, the aperture of the first lens L1 cannot be sufficiently compressed, which is disadvantageous in designing a small head of the system.

0.40deg^-1＜10*FNO/ω＜0.52deg^-1(ii) a Wherein FNO is the f-number of the optical system 10. Specifically, 10 × FNO/ω in some embodiments may be 0.41, 0.42, 0.43, 0.44, 0.45, 0.48, 0.5, or 0.51. The smaller the f-number, the larger the entrance pupil aperture of the system at the same focal length, and the larger the amount of light entering, so that the overall image of the system becomes brighter and clearer, but at the same time, it becomes difficult to increase the field angle of the system. When the above relationship is satisfied, the optical system 10 can have both high light-entering amount and wide viewing angle characteristics.

imgH/TL is more than 0.7 and less than 0.9; wherein ImgH is a half of a diagonal length of an effective imaging area of the imaging plane of the optical system 10, the diagonal length is a length of the effective imaging area of the imaging plane S13 in a diagonal direction, and TL is a distance from the object-side surface S1 of the first lens L1 to the imaging plane of the optical system 10 on the optical axis. Specifically, ImgH/TL in some embodiments may be 0.75, 0.6, 0.65, 0.7, 0.75, 0.8, or 0.85. When the above relationship is satisfied, the overall length of the optical system 10 can be effectively compressed, thereby contributing to a compact design.

1 < (V2+ V3+ V5)/V1 < 2; where V1 is the abbe number of the first lens L1, V2 is the abbe number of the second lens L2, V3 is the abbe number of the third lens L3, and V5 is the abbe number of the fifth lens L5. Specifically, (V2+ V3+ V5)/V1 in some embodiments may be 1.2, 1.25, 1.3, 1.35, 1.4, 1.5, 1.6, 1.7, 1.8, or 1.9. When the relation is satisfied, the front and back chromatic aberration of the system can be corrected, and the selection of the lens material is uniform, so that the system has good imaging quality.

-20 < (R51+ R52)/(R51-R52) < 1; wherein R51 is a radius of curvature of the object-side surface S9 of the fifth lens element L5 at the optical axis, and R52 is a radius of curvature of the image-side surface S10 of the fifth lens element L5 at the optical axis. Specifically, (R51+ R52)/(R51-R52) in some embodiments may be-17.5, -17, -16.5, -16, -10, -5, -1, 0.2, 0.25, 0.3, 0.4, or 0.45. When the above relationship is satisfied, the surface types of the object-side surface S9 and the image-side surface S10 of the fifth lens L5 can be optimized reasonably, so that the aberration and curvature of field of the system can be corrected, and the imaging quality can be improved.

F1/f is more than 1 and less than 2; where f1 is the effective focal length of the first lens L1, and f is the total effective focal length of the optical system 10. Specifically, f1/f in some embodiments may be 1.15, 1.2, 1.25, 1.3, 1.35, 1.4, 1.5, 1.7, 1.8, 1.85, or 1.9. The first lens element L1 provides positive refractive power to the system, and when the above relationship is satisfied, the curvature of field of the system can be effectively corrected, and it is advantageous to control the length of the system.

0.7 < SAG51/SAG61 < 1.6; here, SAG51 is the maximum sagged height of the object-side surface S9 of the fifth lens L5, and SAG61 is the maximum sagged height of the object-side surface S11 of the sixth lens L6. The sagittal height is a distance from the center of the corresponding surface (e.g., the object-side surface S9 of the above fifth lens L5 or the object-side surface S11 of the sixth lens L6) (the intersection of the surface with the optical axis) to the maximum effective radius of the surface in the direction parallel to the optical axis. When the value is negative, the center of the surface is closer to the image side of the system than at the maximum effective radius in a direction parallel to the optical axis of the system; when the value is positive, the center of the face is closer to the object side of the system than at the maximum effective radius in a direction parallel to the optical axis of the system. Specifically, SAG51/SAG61 in some embodiments may be 0.75, 0.8, 0.85, 0.9, 1, 1.1, 1.2, 1.3, 1.45, 1.5, or 1.55. When the above relationship is satisfied, the object-side surface S9 of the fifth lens L5 and the object-side surface S11 of the sixth lens L6 maintain similar curvatures, so that the fifth lens L5 and the sixth lens L6 can be more closely fitted, and the compression of the system length is more facilitated.

0.39 < sigma AT/sigma CT < 0.56; where Σ AT is the sum of the air intervals on the optical axis of each adjacent lens in the optical system 10, and Σ CT is the sum of the thicknesses on the optical axis of each lens in the optical system 10. Specifically, the Σ AT/Σ CT in some embodiments may be 0.4, 0.42, 0.45, 0.48, 0.5, 0.52, 0.53, 0.54, or 0.55. When satisfying above-mentioned relation, can rationally optimize the spacing distance between each adjacent lens, when guaranteeing that the thickness of lens is favorable to the machine-shaping, the air gap between the adjacent lens of compression that can be more abundant to satisfy the miniaturized design trend of camera lens. When the thickness of the lens is less than the lower limit of the above relational expression, the thickness of the lens is too thin, which is disadvantageous for molding the lens, or the air gap between adjacent lenses is too small, which is insufficient in the degree of freedom of the change of the lens shape, and thus, the system aberration cannot be corrected well; when the value is higher than the upper limit of the above relation, the air gap between the lenses is too large, which is not favorable for ultra-thin design.

The optical system 10 of the present application is described in more detail with reference to the following examples:

first embodiment

Referring to fig. 1, in the first embodiment, the optical system 10 includes, in order from an object side to an image side, a stop STO, a first lens element L1 with positive refractive power, a second lens element L2 with positive refractive power, a third lens element L3 with negative refractive power, a fourth lens element L4 with positive refractive power, a fifth lens element L5 with negative refractive power, and a sixth lens element L6 with negative refractive power. Fig. 2 includes a longitudinal spherical aberration diagram, an astigmatism diagram, and a distortion diagram of the optical system 10 in the first embodiment. The reference wavelengths of the astigmatism diagrams and the distortion diagrams of the following examples (first to seventh examples) are both 555 nm.

The object-side surface S1 of the first lens element L1 is convex paraxially, and the image-side surface S2 is concave paraxially; the object side S1 is convex at the circumference, and the image side S2 is concave at the circumference.

The object-side surface S3 of the second lens element L2 is concave at the paraxial region, and the image-side surface S4 is convex at the paraxial region; the object side S3 is convex at the circumference, and the image side S4 is convex at the circumference.

The object-side surface S5 of the third lens element L3 is concave at the paraxial region thereof, and the image-side surface S6 is convex at the paraxial region thereof; object side S5 is concave at the circumference, and image side S6 is convex at the circumference.

The object-side surface S7 of the fourth lens element L4 is concave at the paraxial region thereof, and the image-side surface S8 is convex at the paraxial region thereof; object side S7 is concave at the circumference, and image side S8 is convex at the circumference.

The object-side surface S9 of the fifth lens element L5 is concave at the paraxial region thereof, and the image-side surface S10 is concave at the paraxial region thereof; object side S9 is concave at the circumference, and image side S10 is convex at the circumference.

The object-side surface S11 of the sixth lens element L6 is convex and the image-side surface S12 is concave; the object side S11 is convex at the circumference, and the image side S12 is convex at the circumference.

The object-side surface and the image-side surface of each lens in the optical system 10 are aspheric. The aspheric design can solve the problems of poor imaging clarity, distortion of the field of view, and a narrow field of view, and can contribute to shortening the length of the optical system 10. In addition, the object-side surface and the image-side surface of the fifth lens L5 and the sixth lens L6 have points of inflection. The material of each lens in the optical system 10 is plastic.

In the first embodiment, the optical system 10 satisfies the following relationships:

tanω/D11＝1.005mm^-1；

f123/f456＝0.302；

where ω is a half of the maximum angle of view of the optical system 10, D11 is the maximum effective half-diameter of the object-side surface S1 of the first lens L1, f123 is the combined focal length of the first lens L1, the second lens L2, and the third lens L3, f456 is the combined focal length of the fourth lens L4, the fifth lens L5, and the sixth lens L6, ω is degrees, and D11 is millimeters. When the optical system 10 satisfies the stop STO, the lens configuration and the relation condition about tan ω/D11, the front port diameter of the optical system 10 can be sufficiently compressed, which is beneficial to the exterior design of the small head, and the viewing angle range of the system can be expanded, so that the optical system 10 can obtain a more comprehensive scene. Meanwhile, when the optical system 10 satisfies the relationship of f123/f456, the lens group consisting of the first lens element L1, the second lens element L2 and the third lens element L3 can provide most of the positive refractive power for the optical system 10, so that the incident light can be better focused and imaged, thereby shortening the total length of the system. In the above, the optical system 10 can realize a small head design by reducing the front end aperture, so that when the optical system 10 is applied to an apparatus as a front lens, the under-screen aperture of the apparatus can be effectively reduced to improve the screen ratio, and in addition, the apparatus can have a large viewing angle and high resolution image pickup performance.

D62/D11 ═ 3.454; where D62 is the maximum effective half aperture of the image-side surface S12 of the sixth lens element L6. Satisfying the above relationship, the small-caliber design of the first lens L1 in the system is facilitated, so that the system has a small-head exterior structure.

10*FNO/ω＝0.404deg^-1(ii) a Wherein FNO is the f-number of the optical system 10. The smaller the f-number, the larger the entrance pupil aperture of the system at the same focal length, and the larger the amount of light entering, so that the overall image of the system becomes brighter and clearer, but at the same time, it becomes difficult to increase the field angle of the system. When the above relationship is satisfied, the optical system 10 can have both high light-entering amount and wide viewing angle characteristics.

ImgH/TL ═ 0.76; where ImgH is a half of a length of the imaging surface of the optical system 10 in the diagonal direction, and TL is a distance from the object-side surface S1 of the first lens element L1 to the imaging surface of the optical system 10 on the optical axis. When the above relationship is satisfied, the overall length of the optical system 10 can be effectively compressed, thereby contributing to a compact design.

(V2+ V3+ V5)/V1 ═ 1.636; where V1 is the abbe number of the first lens L1, V2 is the abbe number of the second lens L2, V3 is the abbe number of the third lens L3, and V5 is the abbe number of the fifth lens L5. When the relation is satisfied, the front and back chromatic aberration of the system can be corrected, and the selection of the lens material is uniform, so that the system has good imaging quality.

(R51+ R52)/(R51-R52) ═ 0.375; wherein R51 is a radius of curvature of the object-side surface S9 of the fifth lens element L5 at the optical axis, and R52 is a radius of curvature of the image-side surface S10 of the fifth lens element L5 at the optical axis. When the above relationship is satisfied, the surface types of the object-side surface S9 and the image-side surface S10 of the fifth lens L5 can be optimized reasonably, so that the aberration and curvature of field of the system can be corrected, and the imaging quality can be improved.

f1/f is 1.322; where f1 is the effective focal length of the first lens L1, and f is the total effective focal length of the optical system 10. The first lens element L1 provides positive refractive power to the system, and when the above relationship is satisfied, the curvature of field of the system can be effectively corrected, and it is advantageous to control the length of the system.

SAG51/SAG61 is 0.83; here, SAG51 is the maximum sagged height of the object-side surface S9 of the fifth lens L5, and SAG61 is the maximum sagged height of the object-side surface S11 of the sixth lens L6. When the above relationship is satisfied, the object-side surface S9 of the fifth lens L5 and the object-side surface S11 of the sixth lens L6 maintain similar curvatures, so that the fifth lens L5 and the sixth lens L6 can be more closely fitted, and the compression of the system length is more facilitated.

Σ AT/Σ CT is 0.437; where Σ AT is the sum of the air intervals on the optical axis of each adjacent lens in the optical system 10, and Σ CT is the sum of the thicknesses on the optical axis of each lens in the optical system 10. When satisfying above-mentioned relation, can rationally optimize the spacing distance between each adjacent lens, when guaranteeing that the thickness of lens is favorable to the machine-shaping, the air gap between the adjacent lens of compression that can be more abundant to satisfy the miniaturized design trend of camera lens.

In addition, each lens parameter of the optical system 10 is given by table 1 and table 2. Table 2 shows aspheric coefficients of the respective surfaces of the respective lenses in table 1, where K is a conic coefficient and Ai is a coefficient corresponding to the i-th high-order term in the aspheric surface type formula. The elements from the object side to the image side are arranged in the order of the elements from the top to the bottom in table 1, and the image plane (image forming plane S13) can be understood as the photosensitive surface of the photosensitive element at the later stage when the photosensitive element is assembled. The surface numbers 2 and 3 correspond to the object-side surface S1 and the image-side surface S2 of the first lens L1, respectively, that is, the surface with the smaller surface number is the object-side surface, and the surface with the larger surface number is the image-side surface in the same lens. The Y radius in table 1 is the radius of curvature of the object-side surface or the image-side surface of the corresponding surface number at the optical axis. The first value of the lens in the "thickness" parameter set is the thickness of the lens on the optical axis, and the second value is the distance from the image-side surface of the lens to the object-side surface of the next optical element on the optical axis. The numerical value of the stop ST0 in the "thickness" parameter column is the distance on the optical axis from the stop ST0 to the vertex of the object-side surface of the subsequent lens (the vertex refers to the intersection point of the lens and the optical axis), and we default that the direction from the object side to the image side is the positive direction of the optical axis, when the value is negative, it indicates that the stop ST0 is disposed on the right side of the vertex of the object-side surface of the lens (i.e. the vertex of the object-side surface passes through the stop STO, and the right side can also be understood as the image side), and when the "thickness" parameter of the stop STO is positive, the stop ST0 is on. The optical axes of the lenses in the embodiment of the present application are on the same straight line as the optical axis of the optical system 10. The reference wavelength of the parameter tables in the following examples is 555 nm. In addition, the relational expression calculation and the lens structure of each example are based on data in parameter tables (e.g., table 1, table 2, table 3, table 4, etc.).

In the first embodiment, the total effective focal length f of the optical system 10 is 3.73mm, the f-number FNO is 1.85, one half (1/2) ω of the maximum field angle in the diagonal direction is 45.777 °, the total optical length TL is 5.26mm, and the total optical length is the distance between the object-side surface S1 of the first lens L1 and the image plane S13 of the optical system 10 on the optical axis.

TABLE 1

TABLE 2

Second embodiment

Referring to fig. 3, in the second embodiment, the optical system 10 includes, in order from an object side to an image side, a stop STO, a first lens element L1 with positive refractive power, a second lens element L2 with positive refractive power, a third lens element L3 with negative refractive power, a fourth lens element L4 with positive refractive power, a fifth lens element L5 with positive refractive power, and a sixth lens element L6 with negative refractive power. Fig. 4 includes a longitudinal spherical aberration diagram, an astigmatism diagram, and a distortion diagram of the optical system 10 in the second embodiment.

The object-side surface S3 of the second lens element L2 is convex paraxially, and the image-side surface S4 is convex paraxially; the object side S3 is convex at the circumference, and the image side S4 is concave at the circumference.

The object-side surface S9 of the fifth lens element L5 is convex and the image-side surface S10 is concave; object side S9 is concave at the circumference, and image side S10 is convex at the circumference.

The object-side surface S11 of the sixth lens element L6 is convex and the image-side surface S12 is concave; object side S11 is concave at the circumference, and image side S12 is convex at the circumference.

In addition, the lens parameters of the optical system 10 in the second embodiment are shown in tables 3 and 4, wherein the definitions of the structures and parameters can be obtained from the first embodiment, which is not repeated herein.

TABLE 3

TABLE 4

The optical system 10 in this embodiment satisfies the following relationship:

tanω/D11	1.036	(V2+V3+V5)/V1	1.901
				f123/f456	0.147	(R51+R52)/(R51-R52)	-17.714
D62/D11	3.521	f1/f	1.231
				10*FNO/ω	0.502	SAG51/SAG61	0.704
ImgH/TL	0.742	ΣAT/ΣCT	0.464

third embodiment

Referring to fig. 5, in the third embodiment, the optical system 10 includes, in order from an object side to an image side, a stop STO, a first lens element L1 with positive refractive power, a second lens element L2 with negative refractive power, a third lens element L3 with positive refractive power, a fourth lens element L4 with positive refractive power, a fifth lens element L5 with negative refractive power, and a sixth lens element L6 with negative refractive power. Fig. 6 includes a longitudinal spherical aberration diagram, an astigmatism diagram, and a distortion diagram of the optical system 10 in the third embodiment.

The object-side surface S1 of the first lens element L1 is convex paraxially, and the image-side surface S2 is concave paraxially; the object side S1 is convex at the circumference, and the image side S2 is convex at the circumference.

The object-side surface S3 of the second lens element L2 is concave at the paraxial region, and the image-side surface S4 is concave at the paraxial region; object side S3 is concave at the circumference, like side S4.

The object-side surface S5 of the third lens element L3 is convex paraxially, and the image-side surface S6 is concave paraxially; object side S5 is concave at the circumference, and image side S6 is convex at the circumference.

In addition, the lens parameters of the optical system 10 in the third embodiment are given in tables 5 and 6, wherein the definitions of the structures and parameters can be obtained from the first embodiment, which are not repeated herein.

TABLE 5

TABLE 6

The optical system 10 in this embodiment satisfies the following relationship:

tanω/D11	1.154	(V2+V3+V5)/V1	1.219
				f123/f456	0.686	(R51+R52)/(R51-R52)	0.48
D62/D11	3.578	f1/f	1.145
				10*FNO/ω	0.424	SAG51/SAG61	1.595
ImgH/TL	0.763	ΣAT/ΣCT	0.471

fourth embodiment

Referring to fig. 7, in the fourth embodiment, the optical system 10 includes, in order from an object side to an image side, a stop STO, a first lens element L1 with positive refractive power, a second lens element L2 with positive refractive power, a third lens element L3 with negative refractive power, a fourth lens element L4 with positive refractive power, a fifth lens element L5 with negative refractive power, and a sixth lens element L6 with negative refractive power. Fig. 8 includes a longitudinal spherical aberration diagram, an astigmatism diagram, and a distortion diagram of the optical system 10 in the fourth embodiment.

The object-side surface S3 of the second lens element L2 is convex at the paraxial region, and the image-side surface S4 is concave at the paraxial region; the object side S3 is convex at the circumference, and the image side S4 is concave at the circumference.

In addition, the lens parameters of the optical system 10 in the fourth embodiment are given in tables 7 and 8, wherein the definitions of the structures and parameters can be obtained from the first embodiment, which is not repeated herein.

TABLE 7

TABLE 8

The optical system 10 in this embodiment satisfies the following relationship:

fifth embodiment

Referring to fig. 9, in the fifth embodiment, the optical system 10 includes, in order from an object side to an image side, a stop STO, a first lens element L1 with positive refractive power, a second lens element L2 with negative refractive power, a third lens element L3 with positive refractive power, a fourth lens element L4 with positive refractive power, a fifth lens element L5 with negative refractive power, and a sixth lens element L6 with negative refractive power. Fig. 10 includes a longitudinal spherical aberration diagram, an astigmatism diagram, and a distortion diagram of the optical system 10 in the fifth embodiment.

The object-side surface S5 of the third lens element L3 is convex paraxially, and the image-side surface S6 is concave paraxially; the object side S5 is convex at the circumference, and the image side S6 is concave at the circumference.

In addition, the lens parameters of the optical system 10 in the fifth embodiment are given in tables 9 and 10, wherein the definitions of the structures and parameters can be obtained from the first embodiment, which are not repeated herein.

TABLE 9

Watch 10

The optical system 10 in this embodiment satisfies the following relationship:

tanω/D11	1.074	(V2+V3+V5)/V1	1.194
				f123/f456	0.405	(R51+R52)/(R51-R52)	-0.094
D62/D11	3.455	f1/f	1.358
				10*FNO/ω	0.464	SAG51/SAG61	0.886
ImgH/TL	0.755	ΣAT/ΣCT	0.558

sixth embodiment

Referring to fig. 11, in the sixth embodiment, the optical system 10 includes, in order from an object side to an image side, a stop STO, a first lens element L1 with positive refractive power, a second lens element L2 with positive refractive power, a third lens element L3 with negative refractive power, a fourth lens element L4 with positive refractive power, a fifth lens element L5 with negative refractive power, and a sixth lens element L6 with negative refractive power. Fig. 12 includes a longitudinal spherical aberration diagram, an astigmatism diagram, and a distortion diagram of the optical system 10 in the sixth embodiment.

The object-side surface S3 of the second lens element L2 is convex paraxially, and the image-side surface S4 is convex paraxially; the object side S3 is convex at the circumference, and the image side S4 is convex at the circumference.

In addition, the lens parameters of the optical system 10 in the sixth embodiment are given in tables 11 and 12, wherein the definitions of the structures and parameters can be obtained from the first embodiment, which are not repeated herein.

TABLE 11

TABLE 12

The optical system 10 in this embodiment satisfies the following relationship:

tanω/D11	1.982	(V2+V3+V5)/V1	1.686
				f123/f456	0.376	(R51+R52)/(R51-R52)	0.229
D62/D11	5.049	f1/f	1.942
				10*FNO/ω	0.435	SAG51/SAG61	0.944
ImgH/TL	0.879	ΣAT/ΣCT	0.397

seventh embodiment

Referring to fig. 13, in the seventh embodiment, the optical system 10 includes, in order from an object side to an image side, a stop STO, a first lens element L1 with positive refractive power, a second lens element L2 with positive refractive power, a third lens element L3 with negative refractive power, a fourth lens element L4 with positive refractive power, a fifth lens element L5 with negative refractive power, and a sixth lens element L6 with negative refractive power. Fig. 14 includes a longitudinal spherical aberration diagram, an astigmatism diagram, and a distortion diagram of the optical system 10 in the seventh embodiment.

In addition, the lens parameters of the optical system 10 in the seventh embodiment are given in tables 13 and 14, wherein the definitions of the structures and parameters can be obtained from the first embodiment, which are not repeated herein.

Watch 13

TABLE 14

The optical system 10 in this embodiment satisfies the following relationship:

tanω/D11	1.083	(V2+V3+V5)/V1	1.686
				f123/f456	0.277	(R51+R52)/(R51-R52)	0.304
D62/D11	3.716	f1/f	1.243
				10*FNO/ω	0.519	SAG51/SAG61	0.846
ImgH/TL	0.741	ΣAT/ΣCT	0.492

referring to fig. 15, some embodiments of the present application further provide an image capturing module 20, in which the optical system 10 is assembled with the photosensitive element 210 to form the image capturing module 20, and the photosensitive element 210 is disposed on the image side of the sixth lens element L6, i.e., on the image side of the optical system 10. Generally, the photosensitive surface of the photosensitive element 210 overlaps with the image forming surface S13 of the optical system 10, or the photosensitive surface may also be understood as the image forming surface S13. The photosensitive element 210 may be a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor). By using the optical system 10, the image pickup module 20 has the characteristics of small head, large angle of view, and high resolution.

In some embodiments, an infrared filter L7 is further disposed between the sixth lens L6 and the imaging surface S13 of the system, and the infrared filter L7 is used for filtering infrared light. The infrared filter L7 may be a part of the optical system 10, or may be mounted between the optical system 10 and the light-receiving element 210 together when the optical system 10 and the light-receiving element 210 are assembled.

In some embodiments, the distance between the photosensitive element 210 and each lens in the optical system 10 is relatively fixed, and the camera module 20 is a fixed focus module. In other embodiments, a driving mechanism such as a voice coil motor may be provided to enable the photosensitive element 210 to move relative to each lens in the optical system 10, so as to achieve a focusing effect. Specifically, a coil electrically connected to the driving chip is disposed on the lens barrel to which the above lenses are assembled, and a magnet is disposed in the image pickup module 20, so that the lens barrel is driven to move relative to the photosensitive element 210 by a magnetic force between the energized coil and the magnet, thereby achieving a focusing effect. In other embodiments, a similar driving mechanism may be provided to drive a portion of the lenses in the optical system 10 to move, thereby achieving an optical zoom effect.

Referring to fig. 16, some embodiments of the present application further provide an electronic device 30, and the camera module 20 is applied to the electronic device 30 to enable the electronic device 30 to have a camera function. Specifically, the electronic device 30 includes a fixing member 310, the camera module 20 is mounted on the fixing member 310, and the fixing member 310 may be a circuit board, a middle frame, or the like. The electronic device 30 may be, but is not limited to, a smart phone, a smart watch, an e-book reader, a vehicle-mounted camera device (such as a car recorder), a monitoring device, a medical device (such as an endoscope), a tablet computer, a biometric device (such as a fingerprint recognition device or a pupil recognition device), a PDA (personal digital Assistant), an unmanned aerial vehicle, and the like. Specifically, in one embodiment, the electronic device 30 is a smart phone, the smart phone includes a middle frame and a circuit board, the circuit board is disposed in the middle frame, the camera module 20 is installed in the middle frame of the smart phone, and the light sensing element 210 is electrically connected to the circuit board. The camera module 20 can be used as a front camera module or a rear camera module of the smart phone. When adopting above-mentioned module 20 of making a video recording as the leading module of making a video recording of equipment, can effectively reduce the trompil under the screen of equipment in order to improve the screen and account for the ratio, can also make equipment possess the performance of making a video recording of big visual angle and high-resolution in addition.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An optical system comprising, in order from an object side to an image side:

a diaphragm;

a second lens element with refractive power;

a third lens element with refractive power;

the optical system satisfies the following relationship:

1mm^-1＜tanω/D11＜2mm^-1(ii) a And

0＜f123/f456＜1.0；

where ω is a half of a maximum field angle of the optical system, D11 is a maximum effective half aperture of an object-side surface of the first lens, f123 is a combined focal length of the first lens, the second lens, and the third lens, and f456 is a combined focal length of the fourth lens, the fifth lens, and the sixth lens.

2. The optical system according to claim 1, characterized in that the following relation is satisfied:

3.4＜D62/D11＜5.1；

wherein D62 is the maximum effective half aperture of the image-side surface of the sixth lens element.

3. The optical system according to claim 1, characterized in that the following relation is satisfied:

0.40deg^-1＜10*FNO/ω＜0.52deg^-1；

wherein FNO is an f-number of the optical system.

4. The optical system according to claim 1, characterized in that the following relation is satisfied:

0.7＜ImgH/TL＜0.9；

wherein ImgH is a half of a diagonal length of an effective imaging area of an imaging surface of the optical system, and TL is a distance on an optical axis from an object-side surface of the first lens to the imaging surface of the optical system.

5. The optical system according to claim 1, wherein at least one of the second lens and the third lens has a negative refractive power, and the optical system satisfies the following relationship:

1＜(V2+V3+V5)/V1＜2；

wherein V1 is an abbe number of the first lens, V2 is an abbe number of the second lens, V3 is an abbe number of the third lens, and V5 is an abbe number of the fifth lens.

6. The optical system according to claim 1, characterized in that the following relation is satisfied:

-20＜(R51+R52)/(R51-R52)＜1；

wherein, R51 is a curvature radius of an object side surface of the fifth lens at an optical axis, and R52 is a curvature radius of an image side surface of the fifth lens at the optical axis.

7. The optical system according to claim 1, characterized in that the following relation is satisfied:

1＜f1/f＜2；

wherein f1 is the effective focal length of the first lens, and f is the total effective focal length of the optical system.

8. The optical system according to claim 1, characterized in that the following relation is satisfied:

0.7＜SAG51/SAG61＜1.6；

wherein SAG51 is the maximum saggital height of the object-side surface of the fifth lens and SAG61 is the maximum saggital height of the object-side surface of the sixth lens.

9. The optical system according to claim 1, characterized in that the following relation is satisfied:

0.39＜ΣAT/ΣCT＜0.56；

wherein Σ AT is the sum of the air spaces on the optical axis of each adjacent lens in the optical system, and Σ CT is the sum of the thicknesses on the optical axis of each lens in the optical system.

10. An image pickup module comprising a photosensitive element and the optical system according to any one of claims 1 to 9, wherein the photosensitive element is disposed on an image side of the optical system.

11. An electronic device, comprising a fixing member and the camera module of claim 10, wherein the camera module is disposed on the fixing member.