CN213600973U

CN213600973U - Optical imaging system, image capturing module and electronic device

Info

Publication number: CN213600973U
Application number: CN202022795005.1U
Authority: CN
Inventors: 党绪文; 刘彬彬; 李明; 邹海荣
Original assignee: Jiangxi Jingchao Optical Co Ltd
Current assignee: Jiangxi Jingchao Optical Co Ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-07-02
Anticipated expiration: 2030-11-27

Abstract

The application provides an optical imaging system, an image capturing module and an electronic device. The optical imaging system includes: a first lens element with positive refractive power; a second lens element with refractive power; a third lens element with refractive power; a fourth lens element with positive refractive power; a fifth lens element with refractive power; a sixth lens element with refractive power; a seventh lens element with positive refractive power; an eighth lens element with negative refractive power; the optical imaging system satisfies the following relation: TTL/(IMGH 2) is more than 0.6 and less than or equal to 0.7; wherein, TTL is a distance on an optical axis from an object-side surface of the first lens element to an imaging surface of the optical imaging system, and IMGH is half of an image height corresponding to a maximum field angle of the optical imaging system. According to the optical imaging system, the eight lenses are adopted, the refractive power of each lens is reasonably configured, the surface type complexity of each lens is reduced, the total optical length is small, and the improvement of the resolution of the optical imaging system in the central view field and the edge view field is facilitated.

Description

Optical imaging system, image capturing module and electronic device

Technical Field

The present disclosure relates to optical imaging technologies, and particularly to an optical imaging system, an image capturing module and an electronic device.

Background

At present, the portable imaging main lens takes a high-pixel or RYYB arranged photosensitive chip as a development direction to solve the problem that the image quality is difficult to improve due to the small bottom of the photosensitive chip. The extremely high pixels are used for obtaining extremely high resolution by matching a photosensitive chip with an optical lens with high resolution, so that the quality of a night scene shot image is improved by one level; the RYYB arrangement photosensitive chip improves the light sensitivity from the angle of the chip, and can obtain good night scene shooting effect by being assisted with the increased chip size.

In the process of implementing the present application, the inventor finds that at least the following problems exist in the prior art: the existing eight-piece type optical lens structure is difficult to meet the high resolution requirement of a high-pixel photosensitive chip, so that the resolution at the edge of an effective area is reduced quickly, the imaging quality is influenced, and the existing eight-piece type optical lens structure is large in size and difficult to meet the existing miniaturization requirement.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide an optical imaging system, an image capturing module and an electronic device to solve the above problems.

An embodiment of the present application provides an optical imaging system, sequentially from an object side to an image side, comprising:

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

a second lens element with refractive power having a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region;

a third lens element with refractive power;

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

a fifth lens element with refractive power;

a sixth lens element with refractive power;

a seventh lens element with positive refractive power;

an eighth lens element with negative refractive power having a concave object-side surface at a paraxial region, wherein both the object-side surface and the image-side surface of the eighth lens element are aspheric, and at least one of the object-side surface and the image-side surface of the eighth lens element is provided with at least one inflection point;

the optical imaging system satisfies the following relation:

0.6＜TTL/(IMGH*2)≤0.7；

wherein, TTL is a distance on an optical axis from an object-side surface of the first lens element to an imaging surface of the optical imaging system, and IMGH is half of an image height corresponding to a maximum field angle of the optical imaging system.

The optical imaging system adopts eight lenses, reasonably configures the refractive power of each lens, reduces the surface complexity of each lens, ensures that the total optical length is smaller, and is beneficial to realizing the miniaturization of the optical imaging system; through reasonable configuration of TTL/IMGH values, the resolution of the optical imaging system in the central view field and the edge view field is improved, the optical imaging system is enabled to have high pixels, and the improvement of the image quality of the edge view field is particularly facilitated.

In some embodiments, the third lens element has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region; the object side surface of the fifth lens is a concave surface, and the object side surface and the image side surface of the fifth lens are both aspheric surfaces; the object-side surface of the sixth lens element is convex at the paraxial region, and both the object-side surface and the image-side surface of the sixth lens element are aspheric; the object-side surface of the seventh lens element is convex at a paraxial region, and both the object-side surface and the image-side surface of the seventh lens element are aspheric surfaces; at least one of the object side surface and the image side surface of the fifth lens to the seventh lens is provided with at least one inflection point.

Therefore, the overall size of the optical imaging system is effectively reduced by adjusting the curvature radius and the aspheric surface coefficient of each lens surface, the occupied space is small, the aberration can be effectively corrected, and the imaging quality is improved.

In some embodiments, the optical imaging system satisfies the following relationship:

46.0mm＜(|f2|+|f3|)/FNO＜524.0mm；

wherein f2 is an effective focal length of the second lens, f3 is an effective focal length of the third lens, and FNO is an f-number of the optical imaging system.

Therefore, the refractive power provided by the second lens and the third lens is changed, and the large-aperture light rays are compressed, so that the light beams of each field of view are easier to adjust in the subsequent lens, and the problem of poor optical performance sensitivity caused by large light ray offset angle can be avoided.

|SLOM52|/f＜7.6°/mm；

the SOLM52 is an included angle between a tangent plane of an effective diameter edge of an image side surface of the fifth lens and a plane perpendicular to an optical axis, and f is an effective focal length of the optical imaging system.

The effective focal length of the optical imaging system satisfies the following relation: f is more than 4.6 and less than 5.7, and the field angle of the optical imaging system can reach 91 degrees by matching with an eight-piece lens, so that the good motion shooting effect can be obtained by sacrificing a smaller field angle during motion video shooting; an included angle between a tangent plane of the edge of the effective diameter of the fifth lens and a plane perpendicular to the optical axis is kept in a reasonable processing range, obvious reverse curvature is not seen, smooth transition of edge light rays is facilitated by matching with surface type change, and the stray light risk is small; in addition, the edge thickness and the middle thickness of the fifth lens are uniform, and the forming processing is facilitated.

3.0mm＜(R61/|R62|)*|f6|＜148.0mm；

wherein R61 is a radius of curvature of an object-side surface of the sixth lens at an optical axis, R62 is a radius of curvature of an image-side surface of the sixth lens at the optical axis, and f6 is an effective focal length of the sixth lens.

In this way, the surface shape of the sixth lens element can be changed by changing the curvature radius of the object-side surface and the image-side surface of the sixth lens element, for example, the surface shape of the sixth lens element is W-shaped or C-shaped, wherein the W-shaped surface shape easily deflects the light rays of each field of view at a reasonable angle, which is helpful for reducing the optical performance sensitivity and improving the relative illumination; the C-shaped surface can better improve the compactness among lenses, reduce the overall thickness of the optical imaging system and also have good optical characteristics; and the refractive power of the sixth lens element is changed, and the combined aberration of the optical imaging system can be balanced by matching with other lens elements, so that the overall resolving power is improved.

(R71/|R72|)*|SLOM41|＜9.2°；

wherein R71 is a curvature radius of an object-side surface of the seventh lens element at an optical axis, R72 is a curvature radius of an image-side surface of the seventh lens element at the optical axis, and SLOM41 is an angle between a tangent plane of an effective diameter edge of the object-side surface of the fourth lens element and a plane perpendicular to the optical axis.

Therefore, the seventh lens is in a W-shaped arrangement structure, the aspheric surface introduces fewer high-order terms, the surface form of the seventh lens does not generate violent change, the inclination angle and the thickness are reasonable, and the seventh lens has good processing characteristics; due to reasonable deviation of light, the angle of the final incident imaging surface is smaller, and matching of chips is facilitated; in addition, the change of the included angle between the tangent plane of the effective diameter edge of the object side surface of the fourth lens and the plane vertical to the optical axis can cause the change of the surface type of the object side surface, correspondingly enhances the matching effect of the fourth lens and the third lens, is favorable for reducing the parasitic ghost image caused by light reflection, and improves the compactness of the structure.

0.52＜(ET1+ET2+ET3+ET4)/(CT1+CT2+CT3+CT4)＜0.68；

ET1 is a distance between an effective diameter edge of an object side surface of the first lens element and an effective diameter edge of an image side surface thereof in an optical axis direction, ET2 is a distance between an effective diameter edge of an object side surface of the second lens element and an effective diameter edge of an image side surface thereof in an optical axis direction, ET3 is a distance between an effective diameter edge of an object side surface of the third lens element and an effective diameter edge of an image side surface thereof in an optical axis direction, ET4 is a distance between an effective diameter edge of an object side surface of the fourth lens element and an effective diameter edge of an image side surface thereof in an optical axis direction, CT1 is a distance between an object side surface of the first lens element and an image side surface thereof in an optical axis direction, CT2 is a distance between an object side surface of the second lens element and an image side surface thereof in an optical axis direction, CT3 is a distance between an object side surface of the third lens element and an image side surface thereof in an optical axis direction, and CT4 is a distance between an.

Therefore, the reasonability of the thickness and the gap is related to the forming and manufacturing difficulty of the lens, when the above formula is satisfied, the thicknesses of the first lens to the fourth lens are appropriate, the distance between the lenses is reasonable, the compactness of the lens structure can be effectively improved, and the forming and the assembling of the lens are facilitated; in addition, the first lens to the fourth lens are combined together to be similar to a positive lens, and the reduction of the edge thickness of an effective diameter and the compression of the caliber are matched, so that the light with a large field angle can be reasonably deflected, primary aberration is introduced to be uniform, and the assembly yield and the whole aberration balance are improved.

0.19＜ET78/CT78＜0.45；

ET78 is a distance in the optical axis direction between an effective diameter edge of the image-side surface of the seventh lens element and an effective diameter edge of the object-side surface of the eighth lens element, and CT78 is a distance in the optical axis direction between an intersection of the image-side surface of the seventh lens element and the optical axis and an intersection of the object-side surface of the eighth lens element and the optical axis.

Therefore, the reasonable maintaining of the gap distance between the seventh lens element and the eighth lens element can avoid the excessive bending of the angle between the seventh lens element and the eighth lens element, which is beneficial to correcting the aberration of the optical imaging system generated under the large aperture, so that the refractive power configuration in the direction perpendicular to the optical axis is uniform, which is beneficial to improving the overall image quality and is easy to mold and manufacture.

0.45＜(ET5+ET6+ET7)/CT57＜0.7；

ET5 is a distance between an effective diameter edge of an object-side surface of the fifth lens element and an effective diameter edge of an image-side surface thereof in an optical axis direction, ET6 is a distance between an effective diameter edge of an object-side surface of the sixth lens element and an effective diameter edge of an image-side surface thereof in an optical axis direction, ET7 is a distance between an effective diameter edge of an object-side surface of the seventh lens element and an effective diameter edge of an image-side surface thereof in an optical axis direction, and CT57 is a distance between an intersection point of an object-side surface of the fifth lens element and an optical axis and an intersection point of an image-side surface of the seventh lens element and the optical axis in the optical axis direction.

Therefore, the thicknesses of the middle parts and the edges of the fifth lens to the seventh lens are reasonable, and the surface shape change is not too large, so that the optical imaging system has good molding characteristics; the fifth lens element to the seventh lens element introduce uniform primary aberration, so that the aberration is easy to be balanced integrally, and the reasonable change of the surface shape and the refractive power can support the improvement of the image quality of a large image plane; in addition, the high-level aberration amount can be controlled, and the optical performance sensitivity of the optical imaging system can be effectively controlled.

The embodiment of the application has still provided a get for instance module, includes:

an optical imaging system; and

the photosensitive element is arranged on the image side of the optical imaging system.

The image capturing module comprises an optical imaging system, wherein the optical imaging system reasonably configures the refractive power of each lens by adopting eight lenses, reduces the surface complexity of each lens, ensures that the total optical length is small, and is beneficial to realizing the miniaturization of the optical imaging system; through reasonable configuration of TTL/IMGH values, the resolution of the optical imaging system in a central view field and an edge view field is improved, the optical imaging system is enabled to have high pixels, and miniaturization of the optical imaging system is facilitated.

An embodiment of the present application provides an electronic device, including: the casing with the module of getting for instance of above-mentioned embodiment, get for instance the module and install on the casing.

The electronic device comprises an image capturing module, wherein an optical imaging system in the image capturing module reasonably configures the refractive power of each lens by adopting eight lenses, and reduces the surface complexity of each lens, so that the total optical length is small, and the miniaturization of the optical imaging system is favorably realized; through reasonable configuration of TTL/IMGH values, the resolution of the optical imaging system in a central view field and an edge view field is improved, the optical imaging system is enabled to have high pixels, and miniaturization of the optical imaging system is facilitated.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

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

Fig. 2 is a graph of spherical aberration, astigmatism and distortion of the optical imaging system in the first embodiment of the present application.

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

Fig. 4 is a graph of spherical aberration, astigmatism and distortion of an optical imaging system in a second embodiment of the present application.

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

Fig. 6 is a graph of spherical aberration, astigmatism and distortion of an optical imaging system in a third embodiment of the present application.

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

Fig. 8 is a graph showing spherical aberration, astigmatism and distortion of an optical imaging system according to a fourth embodiment of the present application.

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

Fig. 10 is a graph showing spherical aberration, astigmatism and distortion of an optical imaging system according to a fifth embodiment of the present application.

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

Fig. 12 is a graph showing spherical aberration, astigmatism and distortion of an optical imaging system according to a sixth embodiment of the present application.

Fig. 13 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Description of the main elements

Electronic device 1000

Image capturing module 100

Optical imaging system 10

First lens L1

Second lens L2

Third lens L3

Fourth lens L4

Fifth lens L5

Sixth lens L6

Seventh lens L7

Eighth lens L8

Infrared filter L9

Stop STO

Object sides S2, S4, S6, S8, S10, S12, S14, S16, S18

Like sides S3, S5, S7, S9, S11, S13, S15, S17, S19

Image forming surface S20

Photosensitive element 20

Housing 200

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1, the optical imaging system 10 of the present embodiment 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 refractive power, a third lens element L3 with refractive power, a fourth lens element L4 with positive refractive power, a fifth lens element L5 with refractive power, a sixth lens element L6 with refractive power, a seventh lens element L7 with positive refractive power, and an eighth lens element L8 with negative refractive power.

The first lens element L1 has an object-side surface S2 and an image-side surface S3, the object-side surface S2 of the first lens element L1 is convex at the paraxial region, and the image-side surface S3 of the first lens element L1 is concave at the paraxial region; the second lens element L2 has an object-side surface S4 and an image-side surface S5, the object-side surface S4 of the second lens element L2 is convex at the paraxial region, and the image-side surface S5 of the second lens element L2 is concave at the paraxial region; the third lens element L3 has an object-side surface S6 and an image-side surface S7, the fourth lens element L4 has an object-side surface S8 and an image-side surface S9, the object-side surface S8 of the fourth lens element L4 is convex at a paraxial region, and the image-side surface S9 is convex at a paraxial region; the fifth lens L5 has an object-side surface S10 and an image-side surface S11; the sixth lens L6 has an object-side surface S12 and an image-side surface S13; the seventh lens L7 has an object-side surface S14 and an image-side surface S15; the eighth lens element L8 has an object-side surface S16 and an image-side surface S17, the object-side surface S16 of the eighth lens element L8 is concave at a paraxial region, both the object-side surface S16 and the image-side surface S17 of the eighth lens element L8 are aspheric, and at least one inflection point is disposed on at least one of the object-side surface S16 and the image-side surface S17.

The optical imaging system 10 satisfies the following relationship:

0.6＜TTL/(IMGH*2)≤0.7；

wherein, TTL is the distance on the optical axis from the object side surface S2 of the first lens L1 to the imaging surface S20 of the optical imaging system 10, and IMGH is half of the image height corresponding to the maximum field angle of the optical imaging system 10.

The optical imaging system 10 adopts eight lenses, reasonably configures the refractive power of each lens, and reduces the surface complexity of each lens, so that the total optical length is small, and the miniaturization of the optical imaging system 10 is promoted; through reasonable configuration of TTL/IMGH values, the resolution of the optical imaging system 10 in the central view field and the edge view field is improved, the optical imaging system is provided with high pixels, and the improvement of the image quality of the edge view field is particularly facilitated.

In some embodiments, the object-side surface S6 of the third lens L3 is convex at the paraxial region and the image-side surface S7 is concave at the paraxial region; the object-side surface S10 of the fifth lens element L5 is concave, and the object-side surface S10 and the image-side surface S11 are aspheric; the object-side surface S12 of the sixth lens element L6 is convex at the paraxial region, and both the object-side surface S12 and the image-side surface S13 are aspheric; the object-side surface S14 of the seventh lens element L7 is convex at the paraxial region, and both the object-side surface S14 and the image-side surface S15 of the seventh lens element L7 are aspheric; at least one of the object-side surface and the image-side surface of the fifth lens L5 to the seventh lens L7 is provided with at least one inflection point.

The aspherical surface has a surface shape determined by the following formula:

wherein Z is the longitudinal distance between any point on the aspheric surface and the surface vertex, r is the distance between any point on the aspheric surface and the optical axis, the vertex curvature (reciprocal of curvature radius) of c, k is a conic constant, and Ai is the correction coefficient of the i-th order of the aspheric surface.

Therefore, by adjusting the curvature radius and the aspheric surface coefficient of each lens surface, the overall size of the optical imaging system 10 is effectively reduced, the occupied space is small, the aberration can be effectively corrected, and the imaging quality is improved.

In some embodiments, the optical imaging system 10 further includes a stop STO. The stop STO may be disposed before the first lens L1, after the sixth lens L6, between any two lenses, or on the surface of any one lens. The stop STO is used to reduce stray light, which is helpful to improve image quality. Preferably, the stop STO is disposed on the object-side surface S2 of the first lens L1.

In some embodiments, optical imaging system 10 further includes an infrared filter L9, infrared filter L9 having an object side S18 and an image side S19. The ir filter L9 is disposed on the image side of the eighth lens element L8, and the ir filter L9 is used for filtering the light of the image, specifically isolating the infrared light and preventing the infrared light from being received by the photosensitive element, so as to prevent the infrared light from affecting the color and the resolution of the normal image, and further improve the imaging quality of the imaging lens assembly 10. Preferably, the infrared filter L9 is an infrared cut filter.

In some embodiments, the optical imaging system 10 satisfies the following relationship:

46.0mm＜(|f2|+|f3|)/FNO＜524.0mm；

where f2 is the effective focal length of the second lens L2, f3 is the effective focal length of the third lens L3, and FNO is the f-number of the optical imaging system 10.

Thus, the refractive power provided by the second lens element L2 and the third lens element L3 is changed, and the light beams with large aperture are compressed, so that the light beams in each field of view can be easily adjusted in the subsequent lens elements, and the problem of poor optical performance sensitivity caused by large light beam deflection angle can be avoided.

Wherein, the diaphragm number has decided the gross energy of the light of incidenting to the imaging plane, and the diaphragm number of this application satisfies following relational expression: FNO is more than or equal to 1.3 and less than or equal to 1.6, and within the range, the night scene shooting capability of the miniature camera equipment can be better improved, and meanwhile, the production feasibility is good; and the reduction of the f-number can compress the size of the Airy's plaque, thereby having higher resolution limit. However, when FNO is greater than 1.6, under the condition of insufficient light, the problem of dark corners around the imaging surface is not solved, and the effect of enhancing the shooting capability is poor; when FNO is less than 1.3, the optical entrance pupil is large, dust is easily attached, the design difficulty is large, and the mass production is not facilitated.

|SLOM52|/f＜7.6°/mm；

the SOLM52 is an angle between a tangent plane of an effective radial edge of the image-side surface S11 of the fifth lens element L5 and a plane perpendicular to the optical axis, and f is an effective focal length of the optical imaging system 10.

The effective focal length of the optical imaging system 10 satisfies the following relationship: f is more than 4.6 and less than 5.7, and the field angle of the optical imaging system 10 can reach 91 degrees by matching with an eight-piece lens, so that the good motion shooting effect can be obtained by sacrificing a small field angle in motion video shooting; an included angle between a tangent plane of the edge of the effective diameter of the fifth lens and a plane perpendicular to the optical axis is kept in a reasonable processing range, obvious reverse curvature is not seen, smooth transition of edge light rays is facilitated by matching with surface type change, and the stray light risk is small; in addition, the edge thickness and the middle thickness of the fifth lens are uniform, and the forming processing is facilitated.

3.0mm＜(R61/|R62|)*|f6|＜148.0mm；

where R61 is a radius of curvature of the object-side surface S12 of the sixth lens L6 at the optical axis, R62 is a radius of curvature of the image-side surface S13 of the sixth lens L6 at the optical axis, and f6 is an effective focal length of the sixth lens L6.

In this way, the surface shape of the sixth lens element L6 can be changed by changing the curvature radius of the object-side surface S12 and the image-side surface S13 of the sixth lens element L6, for example, the surface shape of the sixth lens element L6 is W-shaped or C-shaped, wherein the W-shaped surface shape easily deflects the light rays of each field of view at a reasonable angle, which is helpful for reducing the optical performance sensitivity and improving the relative illumination; the C-shaped surface can better improve the compactness among the lenses, reduce the overall thickness of the optical imaging system 10 and also have good optical characteristics; moreover, the refractive power of the sixth lens element L6 is changed to match with other lens elements, so that the integrated aberration of the optical imaging system 10 can be balanced, and the overall resolving power can be improved.

(R71/|R72|)*|SLOM41|＜9.2°；

where R71 is a radius of curvature of the object-side surface S14 of the seventh lens L7 at the optical axis, R72 is a radius of curvature of the image-side surface S15 of the seventh lens L7 at the optical axis, and SLOM41 is an angle between a tangent plane to an effective diameter edge of the object-side surface S8 of the fourth lens L4 and a plane perpendicular to the optical axis.

Thus, the seventh lens L7 is in a W-shaped arrangement structure, and the aspheric surface introduces fewer high-order terms, so that the surface shape of the seventh lens is not changed drastically, the inclination angle and the thickness are reasonable, and the seventh lens has good processing characteristics; due to reasonable deviation of light, the angle of the final incident imaging surface is smaller, and matching of chips is facilitated; in addition, the change of the included angle between the tangent plane of the effective diameter edge of the object side surface S8 of the fourth lens L4 and the plane perpendicular to the optical axis can cause the change of the surface shape of the object side surface, so that the matching effect of the fourth lens L4 and the third lens L3 is correspondingly enhanced, the reduction of the parasitic ghost image caused by light reflection is facilitated, and the compactness of the structure is improved.

0.52＜(ET1+ET2+ET3+ET4)/(CT1+CT2+CT3+CT4)＜0.68；

ET1 is a distance between an effective diameter edge of an object side surface of the first lens L1 and an effective diameter edge of an image side surface thereof in an optical axis direction, ET2 is a distance between an effective diameter edge of an object side surface S4 of the second lens L2 and an effective diameter edge of an image side surface thereof in the optical axis direction, ET3 is a distance between an effective diameter edge of an object side surface S6 of the third lens L3 and an effective diameter edge of an image side surface S7 thereof in the optical axis direction, ET4 is a distance between an effective diameter edge of an object side surface S8 of the fourth lens L4 and an effective diameter edge of an image side surface S9 thereof in the optical axis direction, CT 9 is a distance between the object side surface S9 of the first lens L9 and the image side surface S9 thereof in the optical axis direction, CT 9 is a distance between the object side surface S9 of the second lens L9 and the image side surface S9 thereof in the optical axis direction, CT 9 is a distance between the object side surface S9 of the third lens L9 and the image side surface S9 thereof in the optical axis direction, and the CT 9 thereof in the optical axis direction.

Therefore, the reasonability of the thickness and the gap is related to the difficulty of the forming and manufacturing of the lens, when the formula is satisfied, the thicknesses of the first lens L1 to the fourth lens L4 are proper, the distance between the lenses is reasonable, the compactness of the lens structure can be effectively improved, and the forming and the assembling of the lens are facilitated; in addition, the combination of the first lens element L1 to the fourth lens element L4, which are similar to a positive lens element, with the reduction of the effective radial edge thickness and the aperture compression, can provide reasonable deflection for the light with a large field angle, and introduce uniform primary aberration, which helps to improve the assembly yield and the overall aberration balance.

0.19＜ET78/CT78＜0.45；

ET78 is the distance in the optical axis direction between the effective diameter edge of the image-side surface S14 of the seventh lens L7 and the effective diameter edge of the object-side surface S15 of the eighth lens L8, and CT78 is the distance in the optical axis direction between the intersection point of the image-side surface S14 of the seventh lens L7 and the optical axis and the intersection point of the object-side surface S16 of the eighth lens L8 and the optical axis.

Thus, the reasonable maintenance of the gap distance between the seventh lens element L7 and the eighth lens element L8 can prevent the excessive bending of the angle between the seventh lens element L7 and the eighth lens element L8, which is beneficial to correct the aberration generated by the optical imaging system 10 under a large aperture, so that the refractive power distribution in the direction perpendicular to the optical axis is uniform, which is beneficial to improving the overall image quality and is easy to mold and manufacture.

0.45＜(ET5+ET6+ET7)/CT57＜0.7；

ET5 is the distance in the optical axis direction between the effective diameter edge of the object-side surface S10 of the fifth lens L5 and the effective diameter edge of the image-side surface thereof, ET6 is the distance in the optical axis direction between the effective diameter edge of the object-side surface S12 of the sixth lens L6 and the effective diameter edge of the image-side surface thereof, ET7 is the distance in the optical axis direction between the effective diameter edge of the object-side surface S14 of the seventh lens L7 and the effective diameter edge of the image-side surface thereof, and CT57 is the distance in the optical axis direction between the intersection point of the object-side surface S10 of the fifth lens L5 and the optical axis and the intersection point of the image-side surface S15 of the seventh lens L7 and the optical axis.

Thus, the thicknesses of the middle parts and the edges of the fifth lens L5 to the seventh lens L7 are reasonable, and the surface shape change is not too large, so that the optical imaging system has good molding characteristics; the primary aberration introduced by the fifth lens element L5 to the seventh lens element L7 is uniform, the overall balance of aberrations is easy, and the reasonable change of the surface shape and the refractive power can support the improvement of the image quality of a large image plane; in addition, the high-level aberration amount can be controlled, and the optical performance sensitivity of the optical imaging system can be effectively controlled.

First embodiment

Referring to fig. 1, the optical imaging system 10 of the first embodiment 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 negative refractive power, 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 seventh lens element L7 with positive refractive power, an eighth lens element L8 with negative refractive power, and an infrared filter L9.

The object-side surface S1 of the first lens element L1 is convex at the paraxial region, and the image-side surface S2 is concave at the paraxial region; 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 surface S5 of the third lens element L3 is concave at the paraxial region, and the image-side surface S6 is concave at the paraxial region; the object-side surface S7 of the fourth lens element L4 is concave at the paraxial region, and the image-side surface S8 is convex at the paraxial region; the object-side surface S9 of the fifth lens element L5 is concave at the paraxial region, and the image-side surface S10 is concave at the paraxial region; the object-side surface S11 of the sixth lens element L6 is concave at the paraxial region, and the image-side surface S12 is convex at the paraxial region; the object-side surface S13 of the seventh lens element L7 is concave at the paraxial region, and the image-side surface S14 is convex at the paraxial region; the object-side surface S15 of the eighth lens element L8 is convex at the paraxial region, and the image-side surface S16 is convex at the paraxial region.

The object-side surface S1 of the first lens L1 is convex at the near circumference, and the image-side surface S2 is concave at the near circumference; the object-side surface S3 of the second lens L2 is convex at the near circumference, and the image-side surface S4 is concave at the near circumference; the object-side surface S5 of the third lens L3 is concave at the near circumference, and the image-side surface S6 is concave at the near circumference; the object-side surface S7 of the fourth lens L4 is concave at the near circumference, and the image-side surface S8 is convex at the near circumference; the object-side surface S9 of the fifth lens L5 is concave at the near circumference, and the image-side surface S10 is concave at the near circumference; the object-side surface S11 of the sixth lens element L6 is concave at the near circumference, and the image-side surface S12 is convex at the near circumference; the object-side surface S13 of the seventh lens L7 is concave at the near circumference, and the image-side surface S14 is convex at the near circumference; the object-side surface S15 of the eighth lens element L8 is convex at the near circumference, and the image-side surface S16 is convex at the near circumference.

The reference wavelengths of the focal length, refractive index and abbe number in the first embodiment are all 587nm, and the optical imaging system 10 in the first embodiment satisfies the conditions of the following table.

TABLE 1

It should be noted that f is a focal length of the optical imaging system 10, FNO is an f-number of the optical imaging system 10, FOV is a maximum field angle of the optical imaging system 10, and TTL is a distance from the object-side surface of the first lens to the imaging surface of the optical imaging system on the optical axis.

TABLE 2

Fig. 2 shows a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical imaging system 10 of the first embodiment, wherein the longitudinal spherical aberration curves represent convergent focus deviations of light rays of different wavelengths after passing through the lenses of the optical imaging system 10; the astigmatism curves represent meridional image surface curvature and sagittal image surface curvature; the distortion curve represents the distortion magnitude values corresponding to different angles of view. As can be seen from fig. 2, the optical imaging system 10 according to the first embodiment can achieve good imaging quality.

Second embodiment

Referring to fig. 3, the optical imaging system 20 of the second embodiment 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, a sixth lens element L6 with positive refractive power, a seventh lens element L7 with positive refractive power, an eighth lens element L8 with negative refractive power, and an infrared filter L9.

The object-side surface S1 of the first lens element L1 is convex at the paraxial region, and the image-side surface S2 is concave at the paraxial region; 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 surface S5 of the third lens element L3 is convex at the paraxial region, and the image-side surface S6 is concave at the paraxial region; the object-side surface S7 of the fourth lens element L4 is convex at the paraxial region, and the image-side surface S8 is convex at the paraxial region; the object-side surface S9 of the fifth lens element L5 is concave at the paraxial region, and the image-side surface S10 is concave at the paraxial region; the object-side surface S11 of the sixth lens element L6 is convex at the paraxial region, and the image-side surface S12 is convex at the paraxial region; the object-side surface S13 of the seventh lens element L7 is convex at the paraxial region, and the image-side surface S14 is concave at the paraxial region; the object-side surface S15 of the eighth lens element L8 is concave at the paraxial region, and the image-side surface S16 is concave at the paraxial region.

The object-side surface S1 of the first lens element L1 is convex at the near circumference, and the image-side surface S2 is convex at the near circumference; the object-side surface S3 of the second lens L2 is convex at the near circumference, and the image-side surface S4 is concave at the near circumference; the object-side surface S5 of the third lens L3 is concave at the near circumference, and the image-side surface S6 is concave at the near circumference; the object-side surface S7 of the fourth lens L4 is concave at the near circumference, and the image-side surface S8 is convex at the near circumference; the object-side surface S9 of the fifth lens L5 is concave at the near circumference, and the image-side surface S10 is convex at the near circumference; the object-side surface S11 of the sixth lens element L6 is concave at the near circumference, and the image-side surface S12 is convex at the near circumference; the object-side surface S13 of the seventh lens L7 is concave at the near circumference, and the image-side surface S14 is convex at the near circumference; the object-side surface S15 of the eighth lens L8 is concave at the near circumference, and the image-side surface S16 is convex at the near circumference.

The reference wavelengths of the focal length, refractive index and abbe number in the second embodiment are all 587nm, and the optical imaging system 10 in the second embodiment satisfies the conditions of the following table.

TABLE 3

TABLE 4

Fig. 4 shows a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical imaging system 10 of the second embodiment, wherein the longitudinal spherical aberration curves represent the convergent focus deviations of the light rays with different wavelengths after passing through the lenses of the optical imaging system 10; the astigmatism curves represent meridional image surface curvature and sagittal image surface curvature; the distortion curve represents the distortion magnitude values corresponding to different angles of view. As can be seen from fig. 4, the optical imaging system 10 according to the second embodiment can achieve good imaging quality.

Third embodiment

Referring to fig. 5, the optical imaging system 30 of the third embodiment 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, a sixth lens element L6 with positive refractive power, a seventh lens element L7 with positive refractive power, an eighth lens element L8 with negative refractive power, and an infrared filter L9.

The object-side surface S1 of the first lens L1 is convex at the near circumference, and the image-side surface S2 is concave at the near circumference; the object-side surface S3 of the second lens L2 is convex at the near circumference, and the image-side surface S4 is convex at the near circumference; the object-side surface S5 of the third lens L3 is concave at the near circumference, and the image-side surface S6 is concave at the near circumference; the object-side surface S7 of the fourth lens element L4 is convex at the near circumference, and the image-side surface S8 is convex at the near circumference; the object-side surface S9 of the fifth lens L5 is concave at the near circumference, and the image-side surface S10 is convex at the near circumference; the object-side surface S11 of the sixth lens element L6 is convex at the near circumference, and the image-side surface S12 is concave at the near circumference; the object-side surface S13 of the seventh lens L7 is concave at the near circumference, and the image-side surface S14 is convex at the near circumference; the object-side surface S15 of the eighth lens element L8 is convex at the near circumference, and the image-side surface S16 is convex at the near circumference.

The reference wavelengths of the focal length, refractive index and abbe number in the third embodiment are all 587nm, and the optical imaging system 10 in the third embodiment satisfies the conditions of the following table.

TABLE 5

TABLE 6

Fig. 6 shows a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical imaging system 10 of the third embodiment, wherein the longitudinal spherical aberration curves represent the convergent focus deviations of the light rays with different wavelengths after passing through the lenses of the optical imaging system 10; the astigmatism curves represent meridional image surface curvature and sagittal image surface curvature; the distortion curve represents the distortion magnitude values corresponding to different angles of view. As can be seen from fig. 6, the optical imaging system 10 according to the third embodiment can achieve good imaging quality.

Fourth embodiment

Referring to fig. 7, the optical imaging system 40 of the fourth embodiment 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, a sixth lens element L6 with positive refractive power, a seventh lens element L7 with positive refractive power, an eighth lens element L8 with negative refractive power, and an infrared filter L9.

The object-side surface S1 of the first lens L1 is convex at the near circumference, and the image-side surface S2 is concave at the near circumference; the object-side surface S3 of the second lens L2 is convex at the near circumference, and the image-side surface S4 is concave at the near circumference; the object-side surface S5 of the third lens L3 is concave at the near circumference, and the image-side surface S6 is concave at the near circumference; the object-side surface S7 of the fourth lens element L4 is convex at the near circumference, and the image-side surface S8 is convex at the near circumference; the object-side surface S9 of the fifth lens L5 is concave at the near circumference, and the image-side surface S10 is convex at the near circumference; the object-side surface S11 of the sixth lens element L6 is concave at the near circumference, and the image-side surface S12 is convex at the near circumference; the object-side surface S13 of the seventh lens L7 is concave at the near circumference, and the image-side surface S14 is convex at the near circumference; the object-side surface S15 of the eighth lens L8 is concave at the near circumference, and the image-side surface S16 is convex at the near circumference.

The reference wavelengths of the focal length, refractive index and abbe number in the fourth embodiment are all 587nm, and the optical imaging system 10 in the fourth embodiment satisfies the conditions of the following table.

TABLE 7

TABLE 8

Fig. 8 shows a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical imaging system 10 of the fourth embodiment, wherein the longitudinal spherical aberration curves represent the convergent focus deviations of the light rays with different wavelengths after passing through the lenses of the optical imaging system 10; the astigmatism curves represent meridional image surface curvature and sagittal image surface curvature; the distortion curve represents the distortion magnitude values corresponding to different angles of view. As can be seen from fig. 8, the optical imaging system 10 according to the fourth embodiment can achieve good imaging quality.

Fifth embodiment

Referring to fig. 9 and 10, the optical imaging system 50 of the fifth embodiment 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 negative refractive power, a fourth lens element L4 with positive refractive power, a fifth lens element L5 with positive refractive power, a sixth lens element L6 with negative refractive power, a seventh lens element L7 with positive refractive power, an eighth lens element L8 with negative refractive power, and an infrared filter L9.

The object-side surface S1 of the first lens element L1 is convex at the paraxial region, and the image-side surface S2 is concave at the paraxial region; 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 surface S5 of the third lens element L3 is concave at the paraxial region, and the image-side surface S6 is concave at the paraxial region; the object-side surface S7 of the fourth lens element L4 is concave at the paraxial region, and the image-side surface S8 is convex at the paraxial region; the object-side surface S9 of the fifth lens element L5 is concave at the paraxial region, and the image-side surface S10 is convex at the paraxial region; the object-side surface S11 of the sixth lens element L6 is concave at the paraxial region, and the image-side surface S12 is convex at the paraxial region; the object-side surface S13 of the seventh lens element L7 is convex at the paraxial region, and the image-side surface S14 is convex at the paraxial region; the object-side surface S15 of the eighth lens element L8 is convex at the paraxial region, and the image-side surface S16 is convex at the paraxial region.

The reference wavelengths of the focal length, refractive index and abbe number in the fifth embodiment are all 587nm, and the optical imaging system 10 in the fifth embodiment satisfies the conditions of the following table.

TABLE 9

Watch 10

Fig. 10 shows a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical imaging system 10 of the fifth embodiment, wherein the longitudinal spherical aberration curves represent convergent focus deviations of light rays of different wavelengths after passing through the lenses of the optical imaging system 10; the astigmatism curves represent meridional image surface curvature and sagittal image surface curvature; the distortion curve represents the distortion magnitude values corresponding to different angles of view. As can be seen from fig. 10, the optical imaging system 10 according to the fifth embodiment can achieve good imaging quality.

Sixth embodiment

Referring to fig. 11, the optical imaging system 60 of the sixth embodiment 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 positive refractive power, a sixth lens element L6 with negative refractive power, a seventh lens element L7 with positive refractive power, an eighth lens element L8 with negative refractive power, and an infrared filter L9.

The object-side surface S1 of the first lens element L1 is convex at the near circumference, and the image-side surface S2 is convex at the near circumference; the object-side surface S3 of the second lens L2 is convex at the near circumference, and the image-side surface S4 is concave at the near circumference; the object-side surface S5 of the third lens L3 is concave at the near circumference, and the image-side surface S6 is convex at the near circumference; the object-side surface S7 of the fourth lens L4 is concave at the near circumference, and the image-side surface S8 is convex at the near circumference; the object-side surface S9 of the fifth lens L5 is concave at the near circumference, and the image-side surface S10 is convex at the near circumference; the object-side surface S11 of the sixth lens element L6 is concave at the near circumference, and the image-side surface S12 is convex at the near circumference; the object-side surface S13 of the seventh lens L7 is concave at the near circumference, and the image-side surface S14 is convex at the near circumference; the object-side surface S15 of the eighth lens L8 is concave at the near circumference, and the image-side surface S16 is convex at the near circumference.

The reference wavelengths of the focal length, refractive index and abbe number in the sixth embodiment are all 587nm, and the optical imaging system 10 in the sixth embodiment satisfies the conditions of the following table.

TABLE 11

TABLE 12

Fig. 12 shows a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical imaging system 10 of the sixth embodiment, wherein the longitudinal spherical aberration curves represent the convergent focus deviations of the light rays with different wavelengths after passing through the lenses of the optical imaging system 10; the astigmatism curves represent meridional image surface curvature and sagittal image surface curvature; the distortion curve represents the distortion magnitude values corresponding to different angles of view. As can be seen from fig. 12, the optical imaging system 10 according to the sixth embodiment can achieve good imaging quality.

Table 13 shows values of TTL/(IMGH × 2), (| f2| + | f3|)/FNO, | SLOM52|/f, (R61/| R62|) | f6|, (R71/| R72|) | SLOM41|, (ET1+ ET2+ ET3+ ET4)/(CT1+ CT2+ CT3+ CT4), ET78/CT78, and (ET5+ ET6+ ET7)/CT57 in the optical imaging system 10 of the first to sixth embodiments.

Table 15

Referring to fig. 13, the image capturing module 100 of the present embodiment includes an optical imaging system 10 and a photosensitive element 20, wherein the photosensitive element 20 is disposed on an image side of the optical imaging system 10.

Specifically, the photosensitive element 20 may be a Complementary Metal Oxide Semiconductor (CMOS) image sensor or a Charge-coupled Device (CCD).

The optical imaging system 10 in the image capturing module 100 of the embodiment of the application adopts eight lenses, reasonably configures the refractive power of each lens, and reduces the complexity of the surface shape of each lens, so that the total optical length is small, which is beneficial to realizing the miniaturization of the optical imaging system 10; through reasonable configuration of TTL/IMGH values, the resolution of the optical imaging system 10 in the central view field and the edge view field is improved, the optical imaging system is provided with high pixels, and the improvement of the image quality of the edge view field is particularly facilitated.

Referring to fig. 13, the electronic device 1000 according to the embodiment of the present disclosure includes a housing 200 and an image capturing module 100, wherein the image capturing module 100 is mounted on the housing 200 for capturing an image.

The electronic device 1000 according to the embodiment of the present disclosure includes, but is not limited to, imaging-enabled electronic devices such as smart phones, car lenses, monitoring lenses, tablet computers, notebook computers, electronic book readers, Portable Multimedia Players (PMPs), portable phones, video phones, digital still cameras, mobile medical devices, and wearable devices.

The optical imaging system 10 in the electronic device 1000 of the above embodiment reasonably configures the refractive power of each lens by using eight lenses, and reduces the complexity of the surface shape of each lens, so that the total optical length is small, which is beneficial to implementing miniaturization of the optical imaging system 10; through reasonable configuration of TTL/IMGH values, the resolution of the optical imaging system 10 in the central view field and the edge view field is improved, the optical imaging system is provided with high pixels, and the improvement of the image quality of the edge view field is particularly facilitated.

It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application and not for limiting, and although the present application is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present application without departing from the spirit and scope of the technical solutions of the present application.

Claims

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

a third lens element with refractive power;

a fifth lens element with refractive power;

a sixth lens element with refractive power;

a seventh lens element with positive refractive power;

the optical imaging system satisfies the following relation:

0.6＜TTL/(IMGH*2)≤0.7；

2. The optical imaging system of claim 1, wherein the third lens element has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region; the object side surface of the fifth lens is a concave surface, and the object side surface and the image side surface of the fifth lens are both aspheric surfaces; the object-side surface of the sixth lens element is convex at the paraxial region, and both the object-side surface and the image-side surface of the sixth lens element are aspheric; the object-side surface of the seventh lens element is convex at a paraxial region, and both the object-side surface and the image-side surface of the seventh lens element are aspheric surfaces; at least one of the object side surface and the image side surface of the fifth lens to the seventh lens is provided with at least one inflection point.

3. The optical imaging system of claim 1, wherein the optical imaging system satisfies the following relationship:

46.0mm＜(|f2|+|f3|)/FNO＜524.0mm；

4. The optical imaging system of claim 1, wherein the optical imaging system satisfies the following relationship:

|SLOM52|/f＜7.6°/mm；

5. The optical imaging system of claim 1, wherein the optical imaging system satisfies the following relationship:

3.0mm＜(R61/|R62|)*|f6|＜148.0mm；

6. The optical imaging system of claim 1, wherein the optical imaging system satisfies the following relationship:

(R71/|R72|)*|SLOM41|＜9.2°；

7. The optical imaging system of claim 1, wherein the optical imaging system satisfies the following relationship:

0.52＜(ET1+ET2+ET3+ET4)/(CT1+CT2+CT3+CT4)＜0.68；

8. The optical imaging system of claim 1, wherein the optical imaging system satisfies the following relationship:

0.19＜ET78/CT78＜0.45；

9. The optical imaging system of claim 1, wherein the optical imaging system satisfies the following relationship:

0.45＜(ET5+ET6+ET7)/CT57＜0.7；

10. An image capturing module, comprising:

the optical imaging system of any one of claims 1 to 9; and

11. An electronic device, comprising:

a housing; and

the image capture module of claim 10, mounted on the housing.