CN213023738U

CN213023738U - Optical system, camera module and electronic equipment

Info

Publication number: CN213023738U
Application number: CN202021669589.1U
Authority: CN
Inventors: 杨健; 李明; 华露
Original assignee: Jiangxi Jingchao Optical Co Ltd
Current assignee: Jiangxi Jingchao Optical Co Ltd
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2021-04-20
Anticipated expiration: 2030-08-12

Abstract

The utility model relates to an optical system, module and electronic equipment make a video recording. The optical system comprises at least one light blocking piece and at least two lenses, wherein the light blocking piece is arranged between the lenses of the optical system and satisfies the following relations: sd/sd0 is more than or equal to 1; sd/max (sd1, sd2) < 1 is more than or equal to 0.9; sd is the effective clear aperture of the light-blocking member, sd0 is the beam diameter when the central field beam of the optical system reaches the light-blocking member, sd1 is the effective clear aperture of the object-side surface of the lens closest to the light-blocking member in the optical system, sd2 is the effective clear aperture of the image-side surface of the lens closest to the light-blocking member in the optical system, max (sd1, sd2) is the maximum of sd1 and sd2, and when the optical system includes two or more light-blocking members, sd is the effective clear aperture of the light-blocking member closest to the object side in the optical system. The light blocking piece can reduce aberration caused by marginal rays.

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 market demands for large-aperture, wide-angle, telephoto, and other imaging lenses are gradually increasing. Among them, how to more effectively correct the aberration of the optical system to improve the imaging quality of the lens is one of the important points in the present industry.

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 for effectively correcting aberration.

An optical system, comprising at least one light barrier and at least two lenses along an optical axis, wherein the light barrier is disposed between the lenses of the optical system, the light barrier is configured to limit an incident light beam of the optical system within a maximum field of view, and the light barrier satisfies the following relationships:

sd/sd0≥1；

0.9≤sd/max(sd1，sd2)＜1；

wherein sd is the effective clear aperture of the light blocking piece, and sd0 is the beam diameter when the central field beam of the optical system reaches the light blocking piece; sd1 is an effective clear aperture of an object side surface of a lens closest to the light blocking member in the optical system, sd2 is an effective clear aperture of an image side surface of a lens closest to the light blocking member in the optical system, max (sd1, sd2) is a maximum value of sd1 and sd2, and when the optical system includes two or more light blocking members, sd is an effective clear aperture of the light blocking member closest to the object side in the optical system. The light blocking piece can block the edge light of the corresponding view field area in the maximum view field, and effectively reduces the aberration such as spherical aberration, coma aberration and chromatic aberration caused by the edge light, so that the imaging quality of the system is improved, and in addition, the light blocking piece can be prevented from blocking the light of the central view field, so that the excessive reduction of the imaging brightness of the system is avoided, the imaging definition is favorably kept, and the central view field of the system is an on-axis view field. In addition, when the relation condition of sd/max (sd1, sd2) is satisfied, the light blocking member and the light-passing aperture of the adjacent lens surface can form a good configuration, so that the edge light of the corresponding field of view (non-central field of view) can be blocked, the problems of spherical aberration, coma aberration, chromatic aberration and other aberrations caused by the edge light are reduced, the imaging quality of the system is improved, the excessive reduction of the brightness of the limited field of view due to the excessively strong blocking of the edge light by the light blocking member can be prevented, the definition of the corresponding imaging area is influenced, and the generation of a dark angle is favorably avoided.

In one embodiment, the optical system includes two light barriers, where the two light barriers are respectively a first light barrier and a second light barrier, the first light barrier is disposed between two adjacent lenses of the optical system, the second light barrier is disposed between two adjacent lenses of the optical system, the first light barrier, the second light barrier, and the lenses are arranged along an optical axis of the optical system, and the first light barrier is disposed on an object side of the second light barrier, where the first light barrier satisfies the following relationship:

sdx/sdx0.5＜1；

sdx/sdx1≥1；

the second light blocking member satisfies the following relationship:

sdy/sdy0.6≥1；

sdy/sdy1＜1；

wherein sdx is an effective clear aperture of the first light blocking member, sdx 0.5.5 is a beam diameter of the optical system when an incident beam in a 0.5 field of view reaches the first light blocking member, sdx1 is a beam diameter of the optical system when an incident beam in a maximum field of view reaches the first light blocking member, sdy is an effective clear aperture of the second light blocking member, sdy0.6 is a beam diameter of the optical system when an incident beam in a 0.6 field of view reaches the second light blocking member, and sdy1 is a beam diameter of the optical system when an incident beam in a maximum field of view reaches the second light blocking member. The first light blocking piece can block marginal light rays of an inner view field, the second light blocking piece can block marginal light rays of an outer view field, the inner view field is a view field area between a system central view field and a system 0.6 view field, and the outer view field is a view field area between the system 0.6 view field and a system maximum view field. By arranging the two light blocking pieces to respectively block the marginal rays of the inner view field and the outer view field, various aberrations caused by the marginal rays of the inner view field and the outer view field can be effectively eliminated, and the imaging quality of the system can be effectively improved. And the first light blocking piece can not limit the light of an external view field, the second light blocking piece can not limit the light of an internal view field, and the two light blocking pieces respectively limit the marginal light of different view field areas, so that the aberration caused by the light of different view fields is eliminated, and simultaneously, the incident light beam can be prevented from being excessively limited to cause the brightness of an imaging picture to be sharply reduced, and the system can be balanced between the aberration elimination and the good imaging definition maintenance.

In one embodiment, the optical system includes seven lenses.

In one embodiment, the optical system includes a light barrier, the light barrier is a first light barrier, and the first light barrier satisfies the following relationship:

sdx/sdx0.5＜1；

sdx/sdx1≥1；

sdx 0.5.5 is the beam diameter of the optical system when the incident beam of the 0.5 field of view reaches the first light-blocking member, and sdx1 is the beam diameter of the optical system when the incident beam of the maximum field of view reaches the first light-blocking member. The first light blocking piece can block marginal light rays of the inner view field, and the inner view field is a view field area between a system central view field and a system 0.6 view field, so that various aberrations caused by the marginal light rays of the inner view field can be effectively eliminated, and the imaging quality of the system can be effectively improved.

In one embodiment, the optical system includes five lenses.

In one embodiment, the optical system includes a lens with positive refractive power and one light blocking member, the light blocking member is a first light blocking member disposed between the lens with positive refractive power and an adjacent lens on an image side, and the first light blocking member satisfies the following relationship:

sdx/sdx0.6≥1；

sdx/sdx1＜1；

sdx 0.6.6 is the beam diameter of the optical system when the incident beam of the 0.6 field of view reaches the first light-blocking member, and sdx1 is the beam diameter of the optical system when the incident beam of the maximum field of view reaches the first light-blocking member. The first light blocking piece can block marginal light rays of an outer view field, and the outer view field is a view field area between a system 0.6 view field and a system maximum view field, so that various aberrations caused by the marginal light rays of the outer view field can be effectively eliminated, and the imaging quality of the system can be effectively improved.

In one embodiment, the optical system comprises five lenses or six lenses.

In one embodiment, the optical system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element with refractive power, and the first light blocking member is disposed between the second lens element and the third lens element.

In one embodiment, the optical system includes, in order from an object side to an image side, a first lens element, a second lens element and a third lens element with refractive power, and the first light blocking member is disposed between the second lens element and the third lens element.

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

TTL/Imgh≤3；

wherein, TTL is the optical total length of the optical system, and Imgh is the image height corresponding to half of the maximum field angle of the optical system. When the relation is satisfied, the total optical length and the size of an imaging surface of the optical system can be reasonably configured, so that the system is favorably miniaturized.

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

TTL/f≤2.8；

wherein, TTL is the total optical length of the optical system, TTL is the distance on the optical axis from the object-side surface of the lens closest to the object side in the optical system to the system imaging surface, and f is the effective focal length of the optical system. When the relation is satisfied, the optical total length of the optical system and the focal length of the system can form reasonable configuration, so that the miniaturization design of the system is satisfied.

In one embodiment, the optical system includes an aperture stop disposed along the optical axis for limiting light rays of the central field of view. The aperture diaphragm is used for limiting light rays of a central view field of the system so as to control the imaging brightness and the depth of field of the system, and the central view field of the system is an on-axis view field.

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. Through adopting above-mentioned optical system, can effectively reduce aberrations such as spherical aberration, coma, colour difference that marginal light brought to promote the imaging quality of module of making a video recording still can avoid in addition that formation of image luminance excessively reduces, thereby is favorable to keeping the definition of formation of image.

An electronic device comprises a fixing piece and the camera module, wherein the camera module is arranged on the fixing piece. Through adopting above-mentioned module of making a video recording, electronic equipment's formation of image performance can be effectively improved to possess good formation of image quality.

Drawings

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

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

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

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

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

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

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

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

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

FIG. 14 includes 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 structural diagram of an optical system according to an eighth embodiment of the present application;

FIG. 16 includes a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system in the eighth embodiment;

fig. 17 is a schematic structural diagram of an optical system according to a ninth embodiment of the present application;

fig. 18 includes a longitudinal spherical aberration diagram, an astigmatism diagram, and a distortion diagram of the optical system in the ninth embodiment;

fig. 19 is a schematic view of a camera module according to an embodiment of the present application;

fig. 20 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, some embodiments of the present application provide an optical system 10, the optical system 10 including at least one light barrier and at least two lenses along an optical axis, the light barrier being disposed between the lenses of the optical system 10. The light blocking piece is provided with a light through hole, an incident light beam can pass through the light through hole of the light blocking piece, and the incident light beam irradiating outside the light through hole is blocked and cannot reach an imaging surface of the system. The light blocking member is used for limiting an incident light beam of the optical system 10 from a central field of view to a maximum field of view, and the light blocking member satisfies the following relationship: sd/sd0 is more than or equal to 1; and sd/max (sd1, sd2) < 1 is not less than 0.9. Where sd is an effective clear aperture of the light blocking member, sd0 is a beam diameter when the central field beam of the optical system 10 reaches the light blocking member, sd1 is an effective clear aperture of an object side surface of a lens closest to the light blocking member in the optical system 10, sd2 is an effective clear aperture of an image side surface of a lens closest to the light blocking member in the optical system 10, max (sd1, sd2) is a maximum value of sd1 and sd2, and when the optical system 10 includes two or more light blocking members, sd is an effective clear aperture of a light blocking member closest to the object side in the optical system 10. Specifically, sd/sd0 in some embodiments may be 1.05, 1.1, 1.2, 1.3, 1.5, 1.6, 1.7, or 1.8. Sd/max (sd1, sd2) in some embodiments may be 0.94, 0.95, 0.96, 0.97, 0.98, or 0.99. Above-mentioned light blocking piece can block the marginal light of the corresponding field of view area in the biggest field of view, effectively reduces aberration such as spherical aberration, coma, colour difference that marginal light brought to promote the imaging quality of system, still can prevent in addition that light blocking piece from blockking the light of central field of view, thereby avoid the excessive decline of system's formation of image luminance, and then be favorable to keeping the definition of formation of image, the central field of view of system is the epaxial field of view. When the relation of sd/max (sd1, sd2) is satisfied, the light blocking member and the light transmission aperture of the adjacent lens surface can form good configuration, so that the marginal rays of the corresponding field (non-central field) can be blocked, the problems of spherical aberration, coma aberration, chromatic aberration and other aberrations caused by the marginal rays are reduced, and the imaging quality of the system is improved. And particularly, when sd/max (sd1, sd2) ≧ 0.94, the blocking of marginal rays by the light blocking member is too strong to cause excessive reduction in brightness of the limited field of view, affecting the sharpness of the corresponding imaging area.

In the optical system 10, each lens and the light blocking member are coaxially arranged, that is, the optical axis of each lens and the center of the light blocking member are located on the same straight line, which may be referred to as the optical axis of the optical system 10, wherein the center of the light blocking member is the center of the light through hole thereof, and the light through hole of the light blocking member should be a circular hole. Each lens and the light blocking member of the optical system 10 may be attached to the lens barrel.

Specifically, in some embodiments, the optical system 10 includes a light-blocking member, which may be referred to as the first light-blocking member 110, and the first light-blocking member 110 satisfies the following relationship: sdx/sdx0.5 is less than 1; sdx/sdx1 is more than or equal to 1; wherein sdx 0.5.5 is the beam diameter of the optical system 10 when the incident beam of the 0.5 field of view reaches the first light-blocking member 110, and sdx1 is the beam diameter of the optical system 10 when the incident beam of the maximum field of view reaches the first light-blocking member 110. The first light blocking member 110 can block the marginal light of the inner field of view, and the inner field of view is a field of view region from the central field of view of the system to the 0.6 field of view of the system, so that various aberrations caused by the marginal light of the inner field of view can be effectively eliminated, and the imaging quality of the system can be effectively improved.

It should be noted that the field of view is divided into several parts from the center of the imaging plane of the optical system 10 to the maximum height of the image, wherein the center of the imaging plane corresponds to the 0 field of view, i.e. the central field of view; the middle area between the center of the imaging surface and the maximum image height (namely, a half image height area) corresponds to 0.5 field of view; the maximum image height corresponds to 1.0 field of view; the corresponding relation between other fields and the image height is analogized. In addition, the light beam of the incident light beam corresponding to each field of view in the transmission process is annular, the outer diameter of the annular light beam is the beam diameter of the incident light beam corresponding to the field of view, and the part of the annular light beam close to the outer diameter is formed by the marginal light of the field of view. For the same field of view, there is a difference in beam diameter of the incident beam corresponding to different positions on the optical axis of the system.

In other embodiments, the first light barrier 110 satisfies the following relationship: sdx/sdx0.6 is more than or equal to 1; sdx/sdx1 < 1; wherein sdx 0.6.6 is the beam diameter of the optical system 10 when the incident beam of the 0.6 field of view reaches the first light-blocking member 110, and sdx1 is the beam diameter of the optical system 10 when the incident beam of the maximum field of view reaches the first light-blocking member 110. The first light blocking member 110 can block marginal light rays of an outer field of view, and the outer field of view is a field of view area between a 0.6 field of view of the system and a maximum field of view of the system, so that various aberrations caused by the marginal light rays of the outer field of view can be effectively eliminated, and the imaging quality of the system can be effectively improved. In some embodiments, the optical system 10 includes a lens with positive refractive power, and the first light blocking member 110 for blocking peripheral light rays of the external field of view is disposed between the lens with positive refractive power and the adjacent image side lens.

In other embodiments, the optical system 10 includes two light-blocking members, the two light-blocking members are a first light-blocking member 110 and a second light-blocking member 120, respectively, the first light-blocking member 110 is disposed between two adjacent lenses of the optical system 10, the second light-blocking member 120 is disposed between two adjacent lenses of the optical system 10, the first light-blocking member 110, the second light-blocking member 120, and the lenses are arranged along an optical axis of the optical system 10, and the first light-blocking member 110 is disposed on an object side of the second light-blocking member 120, where the first light-blocking member 110 satisfies the following relationship: sdx/sdx0.5 is less than 1; sdx/sdx1 is more than or equal to 1; the second light-blocking member 120 satisfies the following relationship: sdy/sdy0.6 is more than or equal to 1; sdy/sdy1 < 1; wherein sdx is an effective clear aperture of the first light blocking member 110, sdx 0.5.5 is a beam diameter of the optical system 10 when an incident beam in a field of view of 0.5 reaches the first light blocking member 110, sdx1 is a beam diameter of the optical system 10 when an incident beam in a maximum field of view reaches the first light blocking member 110, sdy is an effective clear aperture of the second light blocking member 120, sdy0.6 is a beam diameter of the optical system 10 when an incident beam in a field of view of 0.6 reaches the second light blocking member 120, and sdy1 is a beam diameter of the optical system 10 when an incident beam in a maximum field of view reaches the second light blocking member 120. The first light blocking member 110 can block marginal rays of an inner field of view, and the second light blocking member 120 can block marginal rays of an outer field of view, wherein the inner field of view is a field of view region from a central field of view of the system to a field of view of the system 0.6, and the outer field of view is a field of view region from the field of view of the system 0.6 to a maximum field of view of the system. The two light blocking pieces are arranged to respectively block the marginal rays of the inner view field and the outer view field, so that various aberrations caused by the marginal rays of the inner view field and the outer view field can be effectively eliminated, and the imaging quality of the system can be effectively improved. And the first light blocking member 110 does not limit the light of the external field of view, the second light blocking member 120 does not limit the light of the internal field of view, and the two light blocking members respectively limit the marginal light of different field of view, so that the aberration caused by the light of different fields of view is eliminated, and the brightness of an imaging picture is prevented from being reduced sharply due to the fact that the incident light beam is limited excessively, so that the system can be balanced between the elimination of the aberration and the maintenance of good imaging definition.

In some embodiments, the light blocking member (such as the first light blocking member 110 and the second light blocking member 120) may be a holding structure of the lens or a spacer between the lenses, or a light blocking film may be disposed on a surface of the lens of the optical system 10 to serve as the light blocking member.

The optical system 10 in some embodiments further includes an aperture stop STO disposed along the optical axis for limiting the light rays of the central field of view, which is the on-axis field of view, to control the imaging brightness and depth of field of the system. In other embodiments, the optical system 10 may also use the lens holding structure or the spacer between the lenses as the aperture stop of the system to limit the central field of view light and control the depth of field of the system. In other embodiments, a light-shielding film may also be provided on the surface of the lens to function as an aperture stop.

In some embodiments, the optical system 10 satisfies at least one of the following relationships:

TTL/Imgh is less than or equal to 3; wherein TTL is the total optical length of the optical system 10, and Imgh is the image height corresponding to half of the diagonal length of the effective imaging area of the optical system 10 on the imaging plane, i.e. half of the maximum field angle. Specifically, TTL/Imgh in some embodiments can be 1.4, 1.5, 1.6, 1.8, 2, 2.3, 2.5, 2.6, or 2.7. When the above relationship is satisfied, the total optical length and the size of the image plane of the optical system 10 can be configured reasonably, which is favorable for the system to realize a miniaturized design.

TTL/f is less than or equal to 2.8; wherein, TTL is the total optical length of the optical system 10, TTL is the distance on the optical axis from the object-side surface of the lens closest to the object side in the optical system 10 to the system image plane, and f is the effective focal length of the optical system 10. Specifically, TTL/f in some embodiments may be 0.9, 1, 1.1, 1.3, 1.5, 1.8, 2, 2.2, 2.3, or 2.4. When the above relationship is satisfied, the optical total length of the optical system 10 and the system focal length can be configured reasonably, thereby satisfying the miniaturization design of the system.

When any one of the above relationships is satisfied, the optical system 10 can have the effect of the corresponding relationship condition.

In some embodiments, the number of lenses in optical system 10 may be three, four, five, six, seven, or more. And in some embodiments, the optical system 10 may be a large aperture system, a wide angle system, a tele system, a macro system, or the like.

In some embodiments, the object-side surface and the image-side surface of each lens in the optical system 10 are aspheric, and the aspheric design enables the object-side surface and/or the image-side surface of each lens to have a more flexible design, so that the lens can well solve the undesirable phenomena of poor imaging, distorted field of view, narrow field of view and the like under the condition of being small and thin, and thus the system can have good imaging quality without arranging too many lenses, and the length of the optical system 10 can be shortened. 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 specific configurations of the spherical surface and the aspherical surface 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 some embodiments, each lens in the optical system 10 is made of 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. 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, optical system 10 includes an infrared filter 130, and infrared filter 130 is disposed on the image side of the lens closest to the image side and is fixed relative to each lens in optical system 10. The ir filter 130 may be an ir cut filter for filtering out ir light, so as to prevent the ir light from reaching the imaging surface S15 of the system, thereby preventing the ir light from interfering with normal imaging. An infrared filter 130 may be assembled with each lens as part of the optical system 10. For example, in some embodiments, each lens in the optical system 10 is mounted within a lens barrel, and the infrared filter 130 is mounted at the image end of the lens barrel. In other embodiments, the infrared filter 130 is not a component of the optical system 10, and the infrared filter 130 can 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, the position of the infrared filter 130 may be determined according to actual requirements, and is not described herein. In addition, in some embodiments, the infrared filter 130 may not be provided, but an infrared filter film is provided on an object side surface or an image side surface of one of the lenses of the system to filter infrared light.

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 is a large-aperture optical imaging system, and the optical system 10 includes, in order from an object side to an image side, an aperture 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 first light blocking member 110, a fourth lens element L4 with positive refractive power, a fifth lens element L5 with negative refractive power, a sixth lens element L6 with positive refractive power, a second light blocking member 120, and a seventh lens element 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 ninth examples) are both 555 nm.

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, the sixth lens L6 includes an object side surface S11 and an image side surface S12, and the seventh lens L539 7 includes an object side surface S13 and an image side surface S14. In addition, the optical system 10 further has a virtual image plane S15, and the image plane S15 is located on the image side of the seventh lens element L7. Generally, the image forming surface S17 of the optical system 10 coincides with the photosensitive surface of the photosensitive element, which may also be regarded as the image forming surface S17 of the optical system 10 for ease of understanding.

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

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

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

The object-side surface S7 of the fourth lens element L4 is concave, and the image-side surface S8 is convex.

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

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

The object-side surface S13 of the seventh lens element L7 is convex, and the image-side surface S14 is concave.

Both the object-side surface and the image-side surface of the first lens L1 and the seventh lens L7 are aspheric. The first lens L1 to the seventh lens L7 are all made of plastic.

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

sd/sd0 ═ 1.1; sd is the effective clear aperture of the light-blocking member, and sd0 is the beam diameter of the central field of view beam of the optical system 10 when it reaches the light-blocking member. Above-mentioned light blocking piece can block the marginal light of the corresponding field of view area in the biggest field of view, effectively reduces aberration such as spherical aberration, coma, colour difference that marginal light brought to promote the imaging quality of system, still can prevent in addition that light blocking piece from blockking the light of central field of view, thereby avoid the excessive decline of system's formation of image luminance, and then be favorable to keeping the definition of formation of image, the central field of view of system is the epaxial field of view.

TTL/Imgh is 1.418; wherein TTL is the total optical length of the optical system 10, and Imgh is the image height corresponding to half of the diagonal length of the effective imaging area of the optical system 10 on the imaging plane, i.e. half of the maximum field angle. When the above relationship is satisfied, the total optical length and the size of the image plane of the optical system 10 can be configured reasonably, which is favorable for the system to realize a miniaturized design.

TTL/f is 1.2; wherein, TTL is the total optical length of the optical system 10, TTL is the distance on the optical axis from the object-side surface of the lens closest to the object side in the optical system 10 to the system image plane, and f is the effective focal length of the optical system 10. When the above relationship is satisfied, the optical total length of the optical system 10 and the system focal length can be configured reasonably, thereby satisfying the miniaturization design of the system.

sd/max (sd1, sd2) ═ 0.98; where sd1 is the effective clear aperture of the object side surface of the lens closest to the light blocking member in the optical system 10, sd2 is the effective clear aperture of the image side surface of the lens closest to the light blocking member in the optical system 10, max (sd1, sd2) is the maximum value of sd1 and sd2, and when the optical system 10 includes two or more light blocking members, sd is the effective clear aperture of the light blocking member closest to the object side in the optical system 10. Specifically, in this embodiment, sd1 is the effective clear aperture of the object-side surface S7 of the fourth lens L4, sd2 is the effective clear aperture of the image-side surface S6 of the third lens L3, and sd is the effective clear aperture of the first light blocking member 110. When the relation is met, the light blocking piece and the light passing aperture of the adjacent lens surface can form good configuration, so that edge light rays of a corresponding field of view (non-central field of view) can be blocked, the problems of spherical aberration, coma aberration, chromatic aberration and other aberrations caused by the edge light rays are reduced, and the imaging quality of the system is improved. And particularly, the above-mentioned relational configuration can prevent the light blocking member from blocking the marginal light too strongly to cause the brightness of the limited field of view to excessively decrease, and influence the definition of the corresponding imaging area.

The first light barrier 110 in this embodiment satisfies the relationship: sdx/sdx0.5 is less than 1; and sdx/sdx1 is not less than 1.

The second light-blocking member 120 satisfies the relationship: sdy/sdy0.6 is more than or equal to 1; and sdy/sdy1 < 1.

Wherein sdx is an effective clear aperture of the first light blocking member 110, sdx 0.5.5 is a beam diameter of the optical system 10 when an incident beam in a field of view of 0.5 reaches the first light blocking member 110, sdx1 is a beam diameter of the optical system 10 when an incident beam in a maximum field of view reaches the first light blocking member 110, sdy is an effective clear aperture of the second light blocking member 120, sdy0.6 is a beam diameter of the optical system 10 when an incident beam in a field of view of 0.6 reaches the second light blocking member 120, and sdy1 is a beam diameter of the optical system 10 when an incident beam in a maximum field of view reaches the second light blocking member 120. The first light blocking member 110 can block marginal rays of an inner field of view, and the second light blocking member 120 can block marginal rays of an outer field of view, wherein the inner field of view is a field of view region from a central field of view of the system to a field of view of the system of 0.5, and the outer field of view is a field of view region from a field of view of the system of 0.6 to a maximum field of view of the system. Through setting up above-mentioned two edge light that block light piece difference and block interior field of vision and outer field of vision to can eliminate effectively various aberrations that interior field of vision and outer field of vision's edge light brought, and then can effectively improve the imaging quality of system. And the first light blocking member 110 does not limit the light of the external field of view, the second light blocking member 120 does not limit the light of the internal field of view, and the two light blocking members respectively limit the marginal light of different field of view, so that the aberration caused by the light of different fields of view is eliminated, and simultaneously, the brightness of an imaging picture is prevented from being reduced sharply due to the fact that the incident light beam is limited excessively, so that the system can obtain good balance between the elimination of the aberration and the maintenance of good imaging definition.

In addition, each lens parameter of the optical system 10 is given by table 1 and table 2. Table 2 shows the aspherical coefficients of the corresponding lens surfaces in table 1, where K is a conic coefficient and Ai is a coefficient corresponding to the i-th high-order term in the aspherical surface 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 S15) can be understood as the photosensitive surface of the photosensitive element at the later stage when the photosensitive element is assembled. The

surface numbers

1 and 2 correspond to the object-side surface S1 and the image-side surface S2 of the first lens L1, respectively, that is, in the same lens, 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. 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, the second value is the distance from the image side of the lens to the object side of the next optical element on the optical axis, and when the next optical element of the lens is the stop, the second value represents the distance from the image side of the lens to the center of the stop on the optical axis. 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 refractive index, Abbe number and focal length in the following examples was 587 nm. In addition, the relational expression calculation and the lens structure of each example are based on data in parameter tables (table 1, table 2, table 3, table 4, and the like).

In the first embodiment, the effective focal length f of the optical system 10 is 5.56mm, the f-number FNO is 1.68, the maximum diagonal view angle FOV is 79.42 °, the total optical length TTL is 6.68mm, and the total optical length is the distance from the object-side surface S1 of the first lens L1 to the imaging surface S15 of the system 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, an aperture stop STO, a first lens element L1 with positive refractive power, a first light blocking member 110, 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, and a fifth lens element L5 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 S1 of the first lens element L1 is convex, and the image-side surface S2 is convex.

In addition, the first light barrier 110 satisfies the relationship: sdx/sdx0.5 is less than 1; sdx/sdx1 is more than or equal to 1. The first light blocking member 110 in this embodiment can block marginal rays of the inner field of view (within 0.5 field of view) and does not block rays of the outer field of view (outside 0.6 field of view). The first light blocking member 110 can block the marginal light of the inner field of view, and the inner field of view is a field of view region from the central field of view of the system to the 0.5 field of view of the system, so that various aberrations caused by the marginal light of the inner field of view can be effectively eliminated, and the imaging quality of the system can be effectively improved.

In addition, the lens parameters in the second embodiment are given 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

Number of noodles	1	2	3	4	5
						K	-5.92983	-10	-16.259	8.85891	-26.51984
A4	0.14359	-0.2108	-0.12196	-0.09712	-0.30703
						A6	0.33702	0.78014	1.31505	0.70055	1.30036
A8	-4.97365	0.40595	-1.48577	-1.26175	-10.61735
						A10	24.8339	-20.28291	-13.09769	-1.32834	58.20598
A12	-69.35291	7.92E+01	60.00787	10.08849	-211.84325
						A14	100.6983	-1.34E+02	-103.05594	-1.71E+01	498.77492
A16	-59.90497	8.75E+01	66.20209	1.03E+01	-732.79135
						A18	0	0.00E+00	0	0.00E+00	612.55787
A20	0	0.00E+00	0	0	-219.51112
						Number of noodles	6	7	8	9	10
K	58.56203	-11.24076	-3.10609	26.5007	-4.83345
						A4	-0.2077	-0.09847	0.03907	-0.11313	-0.13674
A6	0.72315	-0.15977	-0.81184	-0.27692	0.06142
						A8	-5.50855	1.22962	2.26483	0.49649	-0.00898
A10	24.95476	-6.18564	-4.03712	-0.37072	-0.00713
						A12	-72.1523	16.33173	4.62417	0.16069	0.00511
A14	131.28661	-24.03314	-3.17907	-0.04316	-0.00159
						A16	-145.90726	19.90776	1.2603	0.00709	0.00027
A18	90.49409	-8.63783	-0.26519	-0.00065	-0.00002
						A20	-23.80532	1.52389	0.02285	0.00003	0

The camera module 10 in this embodiment satisfies the following relationship:

TTL/Imgh	1.34	sd/max(sd1，sd2)	0.99
				TTL/f	1.35	sd/sd0	1.07

third embodiment

Referring to fig. 5, in the third embodiment, the optical system 10 is a wide-angle imaging system, and the optical system 10 includes, in order from an object side to an image side, a first lens element L1 with negative refractive power, a second lens element L2 with positive refractive power, an aperture stop STO, a third lens element L3 with positive refractive power, a first light blocking element 110, a fourth lens element L4 with negative refractive power, a fifth lens element L5 with positive 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 concave, and the image-side surface S2 is convex.

The object-side surface S5 of the third lens element L3 is convex, and the image-side surface S6 is convex.

The object-side surface S7 of the fourth lens element L4 is convex, and the image-side surface S8 is concave.

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

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

In addition, the first light barrier 110 satisfies the relationship: sdx/sdx0.6 is more than or equal to 1; sdx/sdx1 < 1. The first light blocking member 110 in this embodiment can block the marginal light of the outer field of view and does not block the light of the inner field of view. The first light blocking member 110 can block marginal light rays of an outer field of view, and the outer field of view is a field of view area between a 0.6 field of view of the system and a maximum field of view of the system, so that various aberrations caused by the marginal light rays of the outer field of view can be effectively eliminated, and the imaging quality of the system can be effectively improved.

In addition, the lens parameters 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 is not repeated herein.

TABLE 5

TABLE 6

The camera module 10 in this embodiment satisfies the following relationship:

TTL/Imgh	1.542	sd/max(sd1，sd2)	0.94
				TTL/f	2.01	sd/sd0	1.59

fourth embodiment

Referring to fig. 7, in the fourth embodiment, the optical system 10 is a wide-angle imaging system, and the optical system 10 includes, in order from an object side to an image side, a first lens element L1 with negative refractive power, an aperture stop STO, a second lens element L2 with positive refractive power, a first light blocking member 110, a third lens element L3 with negative refractive power, a fourth lens element L4 with positive refractive power, and a fifth lens element L5 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 S1 of the first lens element L1 is concave, and the image-side surface S2 is concave.

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

In addition, the first light barrier 110 satisfies the relationship: sdx/sdx0.6 is more than or equal to 1; sdx/sdx1 < 1. The first light blocking member 110 in this embodiment can block the marginal light of the outer field of view and does not block the light of the inner field of view.

In addition, the lens parameters 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

Number of noodles	1	2	3	4	5	6
							K	4.53207	-38.59446	-1.40892	-4.1902	-59.5756	-7.61409
A4	0.35734	0.49598	-0.05812	-0.15338	-0.02374	-0.08392
							A6	-0.33035	-0.51364	0.62125	-0.86125	-0.65492	0.20235
A8	0.32962	2.22623	-10.51537	4.9142	2.57833	-0.5526
							A10	-0.22783	-10.48878	85.69473	-19.61341	-7.85929	0.94742
A12	0.09522	35.6078	-417.38494	52.51899	16.40434	-1.01184
							A14	-0.01995	-73.81286	1167.1105	-92.28339	-22.2381	0.68024
A16	0.00434	90.44867	-1742.83256	99.29072	18.63717	-0.27298
							A18	-0.00379	-59.81262	1140.40366	-58.5551	-8.74605	0.0563
A20	0.00107	16.24325	-205.5833	13.8618	1.72386	-0.00403
							Number of noodles	5	6	7	8	9	10
K	-59.5756	-7.61409	-60	-1.68635	-1.76286	-3.49109
							A4	-0.02374	-0.08392	-0.04981	0.32234	-0.47634	-0.21072
A6	-0.65492	0.20235	0.02178	-0.98441	0.41242	0.17324
							A8	2.57833	-0.5526	0.16025	1.76408	-0.33163	-0.11248
A10	-7.85929	0.94742	-0.19013	-2.09461	0.22017	0.05317
							A12	16.40434	-1.01184	0.12502	1.65762	-0.10852	-0.0175
A14	-22.2381	0.68024	-0.13656	-0.83482	0.03633	0.00384
							A16	18.63717	-0.27298	0.13178	0.25474	-0.00756	-0.00053
A18	-8.74605	0.0563	-0.06234	-0.04298	0.00087	0.00004
							A20	1.72386	-0.00403	0.01092	0.00308	-0.00004	0

The camera module 10 in this embodiment satisfies the following relationship:

TTL/Imgh	1.705	sd/max(sd1，sd2)	0.96
				TTL/f	2.44	sd/sd0	1.58

fifth embodiment

Referring to fig. 9, in the fifth embodiment, the optical system 10 is a telephoto imaging system, and the optical system 10 includes, in order from an object side to an image side, an aperture stop STO, a first lens element L1 with positive refractive power, a second lens element L2 with negative refractive power, a first light blocking member 110, a third lens element L3 with negative refractive power, a fourth lens element L4 with positive refractive power, and a fifth lens element L5 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.

In addition, the lens parameters 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 is not repeated herein.

TABLE 9

Watch 10

Number of noodles	1	2	3	4	5
						K	-1.81672	-6.02371	-18.0883	-5.8963	-1.18145
A4	0.03533	-0.04468	-0.13689	-0.074	-0.29521
						A6	-0.0077	0.09479	0.23435	0.22674	0.16724
A8	0.02077	-0.0644	-0.14794	-0.42358	-0.08991
						A10	-0.0317	-0.01802	-0.04605	1.06827	0.12891
A12	0.03154	0.06425	0.14413	-2.18766	-0.14343
						A14	-0.02001	-0.05133	-0.08623	2.90038	0.04918
A16	0.00771	0.02074	0.0099	-2.2909	0.01695
						A18	-0.00164	-0.00434	0.00817	0.98415	0.00098
A20	0.00014	0.00038	-0.00232	-0.17656	-0.00941
						Number of noodles	6	7	8	9	10
K	-58.9	5.05908	-1.76404	-0.82091	7.99755
						A4	0.02174	-0.04268	0.11427	0.24499	0.03413
A6	-0.54726	0.0435	-0.14483	-0.3964	-0.15307
						A8	1.76472	-0.10055	-0.04964	0.25649	0.1697
A10	-3.43135	0.11255	0.19699	-0.03734	-0.10417
						A12	4.63469	-0.07038	-0.17859	-0.05133	0.03812
A14	-4.24827	0.02952	0.08916	0.03784	-0.00817
						A16	2.49785	-0.00883	-0.02623	-0.01187	0.00087
A18	-0.84465	0.00167	0.00422	0.00185	-0.00001
						A20	0.12422	-0.00014	-0.00028	-0.00012	0

The camera module 10 in this embodiment satisfies the following relationship:

TTL/Imgh	2.79	sd/max(sd1，sd2)	0.97
				TTL/f	0.86	sd/sd0	1.04

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, an aperture stop STO, a first lens element L1 with positive refractive power, a second lens element L2 with negative refractive power, a first light blocking member 110, a third lens element L3 with negative refractive power, a fourth lens element L4 with positive refractive power, and a fifth lens element L5 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 S5 of the third lens element L3 is concave, and the image-side surface S6 is concave.

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

In addition, the lens parameters 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 is not repeated herein.

TABLE 11

TABLE 12

The camera module 10 in this embodiment satisfies the following relationship:

TTL/Imgh	2.003	sd/max(sd1，sd2)	0.96
				TTL/f	0.89	sd/sd0	1.02

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, an aperture stop STO, a first lens element L1 with positive refractive power, a second lens element L2 with negative refractive power, a first light blocking member 110, a third lens element L3 with positive refractive power, a fourth lens element L4 with negative refractive power, a fifth lens element L5 with positive 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 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 is not described herein.

Watch 13

TABLE 14

Number of noodles	1	2	3	4	5	6
							K	-10.6199	1.31412	-15.06749	-0.00182	-22.42258	-27.918
A4	0.17538	-0.03587	-0.04875	-0.02628	-0.04465	-0.05136
							A6	-0.17608	0.01758	0.03864	0.06803	-0.00398	0.04199
A8	0.20745	-0.0251	-0.00972	-0.13447	0.05524	-0.08143
							A10	-0.20345	0.05811	0.0265	0.3338	-0.23576	0.08629
A12	0.15248	-0.08564	-0.06623	-0.53076	0.45066	-0.05756
							A14	-0.08116	0.07323	0.07502	0.51184	-0.51253	0.01084
A16	0.02842	-0.03685	-0.04502	-0.28899	0.34761	0.01029
							A18	-0.00582	0.01015	0.01421	0.08707	-0.13077	-0.00675
A20	0.00052	-0.00118	-0.00185	-0.01037	0.02119	0.00129
							Number of noodles	7	8	9	10	11	12
K	1	-8.27551	-2.46182	-83.954	-34.94797	-8.0179
							A4	-0.08537	-0.09841	-0.0519	-0.00964	-0.14756	-0.07189
A6	0.02554	0.06354	0.04191	0.03436	0.07401	0.03074
							A8	0.03456	-0.0747	-0.03772	-0.0335	-0.02701	-0.01056
A10	-0.11366	0.08583	0.01525	0.01444	0.00682	0.00245
							A12	0.16033	-0.0668	-0.00272	-0.00357	-0.00111	-0.00038
A14	-0.13092	0.03455	-0.00005	0.00053	0.00012	0.00004
							A16	0.06216	-0.01101	0.0001	-0.00005	-0.00001	0
A18	-0.0158	0.00191	-0.00001	0	0	0
							A20	0.00165	-0.00014	0	0	0	0

The camera module 10 in this embodiment satisfies the following relationship:

TTL/Imgh	1.341	sd/max(sd1，sd2)	0.97
				TTL/f	1.11	sd/sd0	1.03

eighth embodiment

Referring to fig. 15, in the eighth embodiment, the optical system 10 is a macro imaging system, and the optical system 10 includes, in order from an object side to an image side, a first lens element L1 with positive refractive power, a second lens element L2 with negative refractive power, an aperture stop STO, a first light blocking element 110, and a third lens element L3 with negative refractive power. Fig. 16 includes a longitudinal spherical aberration diagram, an astigmatism diagram, and a distortion diagram of the optical system 10 in the eighth embodiment.

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

In addition, the lens parameters in the eighth embodiment are given in tables 15 and 16, wherein the definitions of the structures and parameters can be obtained from the first embodiment, which is not described herein.

Watch 15

TABLE 16

Number of noodles	1	2	3	4	5	6
							K	-0.6475	-16.4614	-14.8901	-14.3420	-0.0582	-1.57193
A4	0.0082	0.1151	0.2943	0.0895	-0.2839	-0.07934
							A6	0.1335	-0.3979	-1.7554	-1.5924	0.0973	-0.05868
A8	-0.8661	-1.0749	5.0802	23.2318	-0.7902	0.14208
							A10	3.4556	15.3922	-2.8184	-222.0479	1.3004	-0.15967
A12	-8.5654	-66.1798	-33.2043	1372.2610	-0.4164	0.09827
							A14	13.4201	154.8658	124.5021	-5411.6092	-3.4552	-0.03188
A16	-12.9465	-210.1152	-207.7909	13144.7810	4.0338	0.00428
							A18	7.0308	155.1043	173.6859	-17910.8311	0.0000	0
A20	-1.6523	-48.2755	-58.7638	10471.7998	0.0000	0

The camera module 10 in this embodiment satisfies the following relationship:

TTL/Imgh	2.749	sd/max(sd1，sd2)	0.98
				TTL/f	1.83	sd/sd0	1.81

ninth embodiment

Referring to fig. 17, in the ninth embodiment, the optical system 10 includes, in order from an object side to an image side, an aperture stop STO, a first lens element L1 with positive refractive power, a second lens element L2 with negative refractive power, a first light blocking member 110, a third lens element L3 with positive refractive power, a fourth lens element L4 with negative refractive power, a fifth lens element L5 with positive refractive power, and a sixth lens element L6 with negative refractive power. Fig. 18 includes a longitudinal spherical aberration diagram, an astigmatism diagram, and a distortion diagram of the optical system 10 in the ninth embodiment.

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

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

In addition, the lens parameters in the ninth embodiment are given in tables 17 and 18, wherein the definitions of the structures and parameters can be obtained from the first embodiment, which is not described herein.

TABLE 17

Watch 18

The camera module 10 in this embodiment satisfies the following relationship:

TTL/Imgh	1.32	sd/max(sd1，sd2)	0.97
				TTL/f	1.12	sd/sd0	1.03

referring to fig. 19, some embodiments of the present application further provide a camera module 20, in which the optical system 10 is assembled with a photosensitive element 210 to form the camera module 20, and the photosensitive element 210 is disposed at an image side of the optical system 10. The photosensitive element 210 may be a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor). Generally, the image forming surface S15 of the optical system 10 overlaps the photosensitive surface of the photosensitive element 210 when assembled.

In some embodiments, the camera module 20 includes an infrared filter 130 disposed between the sixth lens L6 and the photosensitive element 210, and the infrared filter 130 is used for filtering infrared light. In some embodiments, infrared filter 130 can be mounted to the image end of the lens.

Through adopting above-mentioned optical system 10, the module 20 of making a video recording can effectively reduce aberrations such as spherical aberration, coma, colour difference that marginal light brought to promote the imaging quality, still can avoid in addition that formation of image luminance excessively reduces, thereby is favorable to keeping the definition of formation of image.

Referring to fig. 20, 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, a protective shell, 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, 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 some embodiments, 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. By adopting the camera module 20, the imaging performance of the electronic device 30 can be effectively improved, so that the electronic device has good imaging quality.

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 at least one light barrier and at least two lenses along an optical axis, wherein the light barrier is disposed between the lenses of the optical system, the light barrier is configured to limit an incident light beam of the optical system within a maximum field of view, and the light barrier satisfies the following relationships:

sd/sd0≥1；

0.9≤sd/max(sd1，sd2)＜1；

wherein sd is the effective clear aperture of the light blocking piece, and sd0 is the beam diameter when the central field beam of the optical system reaches the light blocking piece; sd1 is an effective clear aperture of an object side surface of a lens closest to the light blocking member in the optical system, sd2 is an effective clear aperture of an image side surface of a lens closest to the light blocking member in the optical system, max (sd1, sd2) is a maximum value of sd1 and sd2, and when the optical system includes two or more light blocking members, sd is an effective clear aperture of the light blocking member closest to the object side in the optical system.

2. The optical system according to claim 1, wherein the optical system includes two light barriers, the two light barriers are respectively a first light barrier and a second light barrier, the first light barrier is disposed between two adjacent lenses of the optical system, the second light barrier is disposed between two adjacent lenses of the optical system, the first light barrier, the second light barrier and the lenses are arranged along an optical axis of the optical system, and the first light barrier is disposed on an object side of the second light barrier, and the first light barrier satisfies the following relationship:

sdx/sdx0.5＜1；

sdx/sdx1≥1；

the second light blocking member satisfies the following relationship:

sdy/sdy0.6≥1；

sdy/sdy1＜1；

wherein sdx is an effective clear aperture of the first light blocking member, sdx 0.5.5 is a beam diameter of the optical system when an incident beam in a 0.5 field of view reaches the first light blocking member, sdx1 is a beam diameter of the optical system when an incident beam in a maximum field of view reaches the first light blocking member, sdy is an effective clear aperture of the second light blocking member, sdy0.6 is a beam diameter of the optical system when an incident beam in a 0.6 field of view reaches the second light blocking member, and sdy1 is a beam diameter of the optical system when an incident beam in a maximum field of view reaches the second light blocking member.

3. An optical system according to claim 1, comprising a light barrier, the light barrier being a first light barrier, the first light barrier satisfying the following relationship:

sdx/sdx0.5＜1；

sdx/sdx1≥1；

sdx 0.5.5 is the beam diameter of the optical system when the incident beam of the 0.5 field of view reaches the first light-blocking member, and sdx1 is the beam diameter of the optical system when the incident beam of the maximum field of view reaches the first light-blocking member.

4. The optical system of claim 1, wherein the optical system comprises a lens with positive refractive power and one of the light barriers, the light barrier comprises a first light barrier disposed between the lens with positive refractive power and an adjacent lens on the image side, and the first light barrier satisfies the following relationship:

sdx/sdx0.6≥1；

sdx/sdx1＜1；

sdx 0.6.6 is the beam diameter of the optical system when the incident beam of the 0.6 field of view reaches the first light-blocking member, and sdx1 is the beam diameter of the optical system when the incident beam of the maximum field of view reaches the first light-blocking member.

5. The optical system of claim 4, comprising, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element with refractive power, wherein the first light blocking member is disposed between the second lens element and the third lens element.

6. The optical system of claim 4, comprising, in order from an object side to an image side, a first lens element, a second lens element and a third lens element with refractive power, wherein the first light blocking member is disposed between the second lens element and the third lens element.

7. The optical system according to claim 1, wherein the optical system satisfies the following relationship:

TTL/Imgh≤3；

wherein, TTL is the optical total length of the optical system, and Imgh is the image height corresponding to half of the maximum field angle of the optical system.

8. The optical system according to claim 1, wherein the optical system satisfies the following relationship:

TTL/f≤2.8；

wherein, TTL is the optical total length of the optical system, and f is the effective focal length of the optical system.

9. The optical system of claim 1, wherein the optical system comprises an aperture stop disposed along the optical axis, the aperture stop configured to limit light rays of the central field of view.

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.