CN212873044U - Optical imaging system, image capturing module, electronic device and automobile - Google Patents
Optical imaging system, image capturing module, electronic device and automobile Download PDFInfo
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- CN212873044U CN212873044U CN202022210535.5U CN202022210535U CN212873044U CN 212873044 U CN212873044 U CN 212873044U CN 202022210535 U CN202022210535 U CN 202022210535U CN 212873044 U CN212873044 U CN 212873044U
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Abstract
The present application provides an optical imaging system, sequentially comprising from an object side to an image side: the lens comprises a first lens with negative bending force, a second lens and a third lens, wherein the object side surface of the first lens is a plane, and the image side surface of the first lens is a concave surface; the second lens with positive bending force, the object side of the second lens is a convex surface; a third lens having a positive refracting power; a fourth lens having a positive refracting power; a fifth lens having a negative refracting power; a sixth lens having a positive refracting power. The image side surface of the fourth lens is glued with the object side surface of the fifth lens, and the image side surface of the fifth lens is glued with the object side surface of the sixth lens. The optical imaging system can ensure high pixel, widen the imaging visual field range, deepen the imaging depth range and capture remote detailed information. The application also provides an image capturing module with the optical imaging system, an electronic device with the image capturing module and an automobile.
Description
Technical Field
The utility model relates to an optical imaging technical field, in particular to optical imaging system, get for instance module, electron device and car.
Background
With the development of the vehicle-mounted industry, the technical requirements of automobile driving auxiliary cameras such as forward-looking cameras, side-looking cameras, automatic cruising cameras, automobile data recorders and automobile backing images are higher and higher. The side-looking camera is a vehicle-mounted camera used for monitoring road conditions on the left side and the right side of the automobile, monitored contents can be used as video analysis contents of a camera system in the driver assistance system, and the contents can assist a driver in visually identifying obstacles and pedestrians in blind areas on the left side and the right side of the automobile in the driving process of the automobile. Meanwhile, the obstacle information captured by the side-looking camera can be fed back to the automobile central system, and the traveling computer can send out a corresponding correct instruction to avoid an accident of the automobile. In addition, the content monitored by the side-looking camera can be used as the judgment basis of law enforcement personnel for various traffic accidents and vehicle violation.
In the process of implementing the present application, the inventor finds that at least the following problems exist in the prior art: the existing side-looking camera lens is low in resolution ratio and small in field depth range, presentation of long-distance details and clear imaging of a large-angle range cannot be simultaneously met, early warning cannot be made due to the fact that the details of long-distance shooting cannot be accurately judged in real time, or obstacles in the large-angle range cannot be avoided, and driving risks are caused.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide an optical imaging system, an image capturing module, an electronic device and an automobile 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:
the lens comprises a first lens with negative bending force, a second lens and a third lens, wherein the object side surface of the first lens is a plane, and the image side surface of the first lens is a concave surface;
the second lens with positive bending force, the object side of the second lens is a convex surface;
a third lens having a positive refracting power;
a fourth lens having a positive refracting power;
a fifth lens having a negative refracting power;
a sixth lens having a positive refracting power;
the image side surface of the fourth lens is glued with the object side surface of the fifth lens, and the image side surface of the fifth lens is glued with the object side surface of the sixth lens.
The optical imaging system can ensure high pixel, widen the imaging visual field range, not only increase the visual field angle range, but also deepen the imaging depth range, capture remote detailed information, and capture shot pictures in a wide angle range, and can more clearly transmit the left and right driving environments of the vehicle body to the system for recognition or clearly display the pictures on the display screen when the vehicle is carried, so that a driver can make accurate judgment and avoid accidents; clear vision can be provided for the driving of the driver in the aspect of driving records, and guarantee is provided for the safe driving of the driver; in the aspect of monitoring security protection, detail information can be clearly recorded, and the like, and corresponding technical support and application guarantee are provided in the aspect of practical application.
In some embodiments, the optical imaging system satisfies the following conditional expression:
-10<f12/(CT2-CT1)<-8；
wherein f12 is a combined focal length of the first lens and the second lens, CT1 is a thickness of the first lens on an optical axis, and CT2 is a thickness of the second lens on the optical axis.
Therefore, the combined focal length of the first lens and the second lens provides negative bending force for the optical imaging system, large-angle light beams can be favorably emitted into the optical imaging system, the wide angle of the optical imaging system is realized, and meanwhile, the astigmatism of the lens group is adjusted through the difference of the central thicknesses of a positive lens and a negative lens, so that the imaging quality of the optical imaging system is favorably improved.
In some embodiments, the optical imaging system satisfies the following conditional expression:
8<(Rs6+Rs7)/(Rs6-Rs7)<21；
wherein Rs6 is a radius of curvature of an object-side surface of the third lens, and Rs7 is a radius of curvature of an image-side surface of the third lens.
Therefore, the curvature degree of the third lens can be controlled by reasonably setting the curvature radius of the object side surface and the image side surface of the third lens, the risk of ghost image generation is reduced, and the image resolving capability of the optical imaging system is improved.
In some embodiments, the optical imaging system satisfies the following conditional expression:
3<f3/f<6；
wherein f3 is an effective focal length of the third lens, and f is an effective focal length of the optical imaging system.
Therefore, the edge aberration can be corrected and the imaging resolution can be improved by arranging the third lens with positive bending force.
In some embodiments, at least one of the fourth lens, the fifth lens and the sixth lens satisfies the following conditional expression:
vdi≤25；
wherein vdi is an abbe number of the at least one lens.
Therefore, chromatic aberration is corrected, the imaging quality of the optical imaging system is improved, and the imaging color saturation of the optical imaging system in the use of the visible light environment is guaranteed.
In some embodiments, the optical imaging system satisfies the following conditional expression:
2.0<f456/f<3.0；
wherein f456 is a combined focal length of the fourth lens, the fifth lens and the sixth lens, and f is an effective focal length of the optical imaging system.
Therefore, the distribution of the bending force of the fourth lens, the fifth lens and the sixth lens is reasonably controlled, on one hand, the height of the incident light of the light beam which is emitted out of the optical imaging system is favorably controlled, so that the high-level aberration of the optical imaging system and the outer diameter of the lenses are reduced, and on the other hand, the influence of the field curvature generated by the front lens group on the resolving power can be corrected.
In some embodiments, the optical imaging system satisfies the following conditional expression:
1.5<CT5/(CT6-CT4)<19；
wherein CT4 is a thickness of the fourth lens on an optical axis, CT5 is a thickness of the fifth lens on an optical axis, and CT6 is a thickness of the sixth lens on an optical axis.
Therefore, the relationship of the central thicknesses of the fourth lens, the fifth lens and the sixth lens is reasonably matched, so that the height of the incident light of the optical imaging system emitted by the light beam is controlled, the high-level aberration of the optical imaging system and the outer diameter of the lenses are reduced, and the influence of the field curvature generated by the front lens group on the resolving power can be corrected.
In some embodiments, the optical imaging system satisfies the following conditional expression:
3<|Rs10/Rs9|<50；
wherein Rs9 is a radius of curvature of the image-side surface of the fourth lens, and Rs10 is a radius of curvature of the image-side surface of the fifth lens.
The image side surface of the fourth lens is glued with the object side surface of the fifth lens, the image side surface of the fifth lens is glued with the object side surface of the sixth lens, and by controlling the curvature radius of the gluing surface, the gluing eccentricity of the gluing lens is favorably reduced, meanwhile, the aberration of optical imaging is favorably corrected, and the imaging quality is improved.
In some embodiments, the optical imaging system further comprises a diaphragm, and the optical imaging system satisfies the following conditional expression:
2.4<EDS*tan(FOV/2)/f<2.6；
and EDS is the aperture of the diaphragm, FOV is the maximum field angle of the optical imaging system, and f is the effective focal length of the optical imaging system.
The size of the diaphragm determines the light inlet quantity of the optical imaging system, the field angle determines the field range of the optical imaging system, and the optical imaging system can be ensured to have sufficient image surface brightness and smaller distortion in the wide-angle imaging range by reasonably matching the relationship among the field angle, the aperture of the diaphragm and the effective focal length of the optical imaging system, so that the optical imaging system is ensured to have higher imaging quality characteristics, and the details of a shot object can be well captured.
In some embodiments, the optical imaging system satisfies the following conditional expression:
5<TTL/CT3<7.5；
wherein, TTL is a distance on the optical axis from the object side surface of the first lens to the image plane, and CT3 is a thickness on the optical axis of the third lens.
Therefore, the relationship between the central thickness of the third lens and the total optical length is reasonably matched, so that the miniaturization and the light weight of the optical imaging system are facilitated.
An embodiment of the present application provides an image capturing module, including:
the optical imaging system described above; and
the photosensitive element is arranged on the image side of the optical imaging system.
The optical imaging system in the image capturing module not only increases the field angle range and deepens the imaging depth range, can capture remote detailed information, but also can capture a shooting picture in a large angle range, can transmit the driving environment of the left and right sides of the vehicle body to the system more clearly for recognition when the vehicle is mounted on a vehicle, or can display the driving environment on a display screen clearly, so that a driver can make accurate judgment and avoid accidents, the optical imaging system is used for driving records, can provide a clear field of view for the driving of the driver, and provides guarantee for the safe driving of the driver; when the method is used for monitoring security, detail information can be clearly recorded, and the like, and corresponding technical support and application guarantee are provided in the aspect of practical application.
An embodiment of the present application provides an electronic device, including:
a housing; and
the image capturing module is mounted on the shell.
The optical imaging system in the electronic device can ensure high pixel and widen the imaging visual field range, not only increases the visual field angle range, but also deepens the imaging depth range, can capture remote detailed information, and can capture a shooting picture in a wide angle range, so that the left and right driving environments of a vehicle body can be more clearly transmitted to the system for recognition or clearly displayed on a display screen when the vehicle is mounted, a driver can conveniently make accurate judgment and avoid accidents, the optical imaging system is used for driving records, a clear visual field can be provided for the driving of the driver, and the safety driving of the driver is guaranteed; when the method is used for monitoring security, detail information can be clearly recorded, and the like, and corresponding technical support and application guarantee are provided in the aspect of practical application.
An embodiment of the present application is an automobile, comprising:
a body; and
the image capturing module is mounted on the body.
The optical imaging system in the automobile widens the imaging visual field range while ensuring high pixels, not only increases the visual field angle range, but also deepens the imaging depth range, can capture remote detailed information, and can capture a shooting picture in a large angle range, so that the left and right driving environments of the automobile body can be more clearly transmitted to the system for recognition or clearly displayed on a display screen when the automobile is carried on the automobile, the automobile is convenient for a driver to make accurate judgment and avoid accidents, the automobile can provide a clear visual field for the driving of the driver when the automobile is used for driving records, and the safety driving of the driver is guaranteed; when the method is used for monitoring security, detail information can be clearly recorded, and the like, and corresponding technical support and application guarantee are provided in the aspect of practical application.
Drawings
Fig. 1 is a schematic structural diagram of an optical imaging system according to a first embodiment of the present invention.
Fig. 2 is a schematic diagram of spherical aberration, astigmatism and distortion of the optical imaging system according to the first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an optical imaging system according to a second embodiment of the present invention.
Fig. 4 is a schematic diagram of spherical aberration, astigmatism and distortion of an optical imaging system according to a second embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an optical imaging system according to a third embodiment of the present invention.
Fig. 6 is a schematic diagram of spherical aberration, astigmatism and distortion of an optical imaging system according to a third embodiment of the present invention.
Fig. 7 is a schematic structural diagram of an optical imaging system according to a fourth embodiment of the present invention.
Fig. 8 is a schematic view of spherical aberration, astigmatism and distortion of an optical imaging system according to a fourth embodiment of the present invention.
Fig. 9 is a schematic structural diagram of an optical imaging system according to a fifth embodiment of the present invention.
Fig. 10 is a schematic view of spherical aberration, astigmatism and distortion of an optical imaging system according to a fifth embodiment of the present invention.
Fig. 11 is a schematic structural diagram of an optical imaging system according to a sixth embodiment of the present invention.
Fig. 12 is a schematic view of spherical aberration, astigmatism and distortion of an optical imaging system according to a sixth embodiment of the present invention.
Fig. 13 is a schematic structural diagram of an optical imaging system according to a seventh embodiment of the present invention.
Fig. 14 is a schematic view of spherical aberration, astigmatism and distortion of an optical imaging system according to a seventh embodiment of the present invention.
Fig. 15 is a schematic structural diagram of an image capturing module according to an embodiment of the present invention.
Fig. 16 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Fig. 17 is a schematic structural diagram of an automobile according to an embodiment of the present invention.
Description of the main elements
First lens L1
Second lens L2
Third lens L3
Fourth lens L4
Fifth lens L5
Sixth lens L6
Optical filter L7
Cover glass L8
Stop STO
Object sides S1, S3, S6, S8, S9, S10, S12, S14
Like side faces S2, S4, S7, S11, S13, S15
Image plane IMG
Photosensitive element 20
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, 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 indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. 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 invention, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. 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 invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
The reference wavelength for the material in this application is 587.56 nm.
Referring to fig. 1, an optical imaging system 10 according to an embodiment of the present invention includes, in order from an object side to an image side: a first lens L1 having a negative bending force; a second lens L2 having a positive bending force; a third lens L3 having a positive bending force; a fourth lens L4 having a positive bending force; a fifth lens L5 having a negative bending force; and a sixth lens L6 having a positive bending force.
Specifically, the first lens L1 has an object side surface S1 and an image side surface S2, the second lens L2 has an object side surface S3 and an image side surface S4, the third lens L3 has an object side surface S6 and an image side surface S7, the fourth lens L4 has an object side surface S8, the fifth lens L5 has an object side surface S9, and the sixth lens L6 has an object side surface S10 and an image side surface S11. The object-side surface S1 of the first lens element L1 is a plane, the image-side surface S2 is a concave surface, the object-side surface S3 of the second lens element L2 is a convex surface, and the image-side surface S4 is a convex surface or a plane; the image-side surface of the fourth lens L4 is cemented with the object-side surface of the fifth lens L5, and the image-side surface of the fifth lens L5 is cemented with the object-side surface of the sixth lens L6.
The optical imaging system 10 can ensure high pixel, widen the imaging visual field range, not only increase the visual field angle range, but also deepen the imaging depth range, capture remote detailed information, and capture shot pictures in a wide angle range, and can more clearly transmit the left and right driving environments of the vehicle body to the system for recognition or clearly display the images on a display screen when the vehicle is mounted, so that a driver can make accurate judgment and avoid accidents; clear vision can be provided for the driving of the driver in the aspect of driving records, and guarantee is provided for the safe driving of the driver; in the aspect of monitoring security protection, detail information can be clearly recorded, and the like, and corresponding technical support and application guarantee are provided in the aspect of practical application.
In some embodiments, optical imaging system 10 further includes a filter L7, filter L7 having an object side S12 and an image side S13. The filter L7 is disposed on the image side of the sixth lens L6. The filter L7 may use a band pass filter to cut off the light in the non-used wavelength band and only pass the light (including visible light and infrared light) in the imaging wavelength band, so that the optical imaging system 10 can be more clear during imaging and avoid interference.
In some embodiments, optical imaging system 10 further includes a cover glass L8, cover glass L8 having an object side S14 and an image side S15. The protective glass L8 is disposed between the image side of the filter L7 and the image plane IMG. The protective glass L8 is completely transparent and light can directly pass through, and the protective glass L8 is used to protect photosensitive elements and the like outside the optical imaging system 10.
When the optical imaging system 10 is used for imaging, light rays emitted or reflected by a subject enter the optical imaging system 10 from the object side direction, pass through the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the optical filter L7 and the protective glass L8 in sequence, and finally converge on the image plane IMG.
In some embodiments, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are all made of plastic, and in this case, the plastic lens can reduce the weight of the optical imaging system 10 and reduce the production cost. In some embodiments, the first lens element L1, the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5 and the sixth lens element L6 are made of glass, so that the optical imaging system 10 can endure higher temperature and has better optical performance. In other embodiments, only the first lens L1 may be made of glass, and the other lenses are made of plastic, in which case, the first lens L1 closest to the object side can better withstand the influence of the ambient temperature on the object side, and the production cost of the optical imaging system 10 is kept low because the other lenses are made of plastic. In other embodiments, the material of the first lens L1 is glass, and the materials of the other lenses can be combined arbitrarily.
In some embodiments, the optical imaging system 10 satisfies the following conditional expressions:
-10<f12/(CT2-CT1)<-8；
where f12 is the combined focal length of the first lens L1 and the second lens L2, CT1 is the thickness of the first lens L1 on the optical axis, and CT2 is the thickness of the second lens L2 on the optical axis.
Thus, the combined focal length of the first lens L1 and the second lens L2 provides a negative bending force for the optical imaging system 10, which is beneficial for the large-angle light beam to enter the optical imaging system 10, thereby realizing the wide angle of the optical imaging system 10, and simultaneously adjusting the astigmatism of the lens group through the difference between the central thicknesses of a positive lens and a negative lens, which is beneficial for improving the imaging quality of the optical imaging system 10. However, above the upper limit of the relation, the combined focal length of the first lens L1 and the second lens L2 is too short, the negative bending force is too strong, and severe edge aberration is easily generated; if the lower limit of the relation is less than the lower limit of the relation, the bending force of the combined focal length is insufficient, which is not favorable for the wide angle.
In some embodiments, the optical imaging system satisfies the following conditional expression:
8<(Rs6+Rs7)/(Rs6-Rs7)<21；
wherein Rs6 is the radius of curvature of the object-side surface S6 of the third lens L3, and Rs7 is the radius of curvature of the image-side surface S7 of the third lens L3.
In this way, by reasonably setting the curvature radius of the object-side surface S6 and the image-side surface S7 of the third lens L3, the degree of curvature of the third lens L3 can be controlled, the risk of generating ghost images is reduced, and the resolution capability of the optical imaging system 10 is improved. However, beyond the range of the above conditional expressions, the risk of ghost generation is high, and the resolution capability of the optical imaging system 10 is poor.
In some embodiments, the optical imaging system 10 satisfies the following conditional expressions:
3<f3/f<6；
where f3 is the effective focal length of the third lens L3, and f is the effective focal length of the optical imaging system 10.
Therefore, because the light rays are emitted from the first lens L1 and the second lens L2 with strong bending force, the edge light rays are incident on the image plane to easily generate large field curvature, and therefore, the third lens L3 with positive bending force is arranged, so that edge aberration can be corrected favorably, and the imaging resolution is improved. However, exceeding the range of the relational expression does not facilitate correction of aberrations of the optical imaging system 10, thereby degrading imaging quality.
In some embodiments, at least one of the fourth lens L4, the fifth lens L5, and the sixth lens L6 satisfies the following conditional expression:
vdi≤25；
wherein vdi is the dispersion coefficient of the at least one lens under d light.
Therefore, the chromatic aberration can be corrected conveniently, the imaging quality of the optical imaging system 10 can be improved, and the imaging color saturation of the optical imaging system 10 in the visible light environment can be ensured. However, exceeding the range of the relation is not favorable for correcting chromatic aberration, and the imaging quality of the optical imaging system 10 is poor.
In some embodiments, the optical imaging system 10 satisfies the following conditional expressions:
2.0<f456/f<3.0；
where f456 is a combined focal length of the fourth lens L4, the fifth lens L5, and the sixth lens L6, and f is an effective focal length of the optical imaging system 10.
Thus, by reasonably controlling the distribution of the bending force of the fourth lens L4, the fifth lens L5 and the sixth lens L6, on one hand, the height of the incident light beam exiting the optical imaging system 10 can be controlled to reduce the high-level aberration of the optical imaging system 10 and the outer diameter of the lens, and on the other hand, the influence of the curvature of field generated by the front lens group on the resolving power can be corrected. However, exceeding the range of the relationship is not favorable for controlling the height of the incident light beam exiting the optical imaging system 10 and for correcting the influence of the curvature of field generated by the front lens group on the resolution.
In some embodiments, the optical imaging system 10 satisfies the following conditional expressions:
1.5<CT5/(CT6-CT4)<19；
here, CT4 is the thickness of the fourth lens L4 on the optical axis, CT5 is the thickness of the fifth lens L5 on the optical axis, and CT6 is the thickness of the sixth lens L6 on the optical axis.
Thus, by reasonably matching the relationship of the central thicknesses of the fourth lens L4, the fifth lens L5 and the sixth lens L6, on one hand, the height of the incident light beam exiting the optical imaging system 10 can be controlled, so as to reduce the high-level aberration of the optical imaging system 10 and the outer diameter of the lens, and on the other hand, the influence of the curvature of field generated by the front lens group on the resolving power can be corrected. However, exceeding the range of the relationship is not favorable for controlling the height of the incident light beam exiting the optical imaging system 10 and for correcting the influence of the curvature of field generated by the front lens group on the resolution.
In some embodiments, the optical imaging system 10 satisfies the following conditional expressions:
3<|Rs10/Rs9|<50；
wherein Rs9 is the radius of curvature of the image-side surface of the fourth lens L4, and Rs10 is the radius of curvature of the image-side surface of the fifth lens L5.
The image-side surface of the fourth lens element L4 is cemented with the object-side surface of the fifth lens element L5, and the image-side surface of the fifth lens element L5 is cemented with the object-side surface of the sixth lens element L6, so that the cemented decentration of the cemented lens elements can be reduced by controlling the curvature radius of the cemented surfaces, and the aberration of the optical imaging system 10 can be corrected, thereby improving the imaging quality. However, above the upper limit of the relation, the flatter the bonding surface is, which is not favorable for the correction of the aberration of the optical imaging system 10; being lower than the lower limit of the relational expression, the gluing surface is too curved, the gluing process of the fifth lens L5 and the sixth lens L6 is not considered, the process difficulty is improved, the gluing eccentric tolerance range is increased, the production yield is reduced, and the cost is not reduced.
In some embodiments, the optical imaging system 10 further includes a stop STO, and the optical imaging system 10 satisfies the following condition:
2.4<EDS*tan(FOV/2)/f<2.6；
wherein EDS is the aperture of the stop STO, FOV is the maximum field angle of the optical imaging system 10, and f is the effective focal length of the optical imaging system 10.
The size of the stop STO determines the light entering amount of the optical imaging system 10, the field angle determines the field range of the optical imaging system 10, and by reasonably matching the field angle of the optical imaging system 10, the aperture of the stop STO and the effective focal length, the optical imaging system 10 can be ensured to have sufficient image plane brightness and smaller distortion in the wide-angle imaging range, the optical imaging system 10 can be ensured to have higher imaging quality characteristics, and the details of a shot object can be well captured. However, exceeding the range of the relational expression is disadvantageous in that the optical imaging system has sufficient image plane brightness and a small amount of distortion in the wide-angle imaging range.
In some embodiments, the optical imaging system 10 satisfies the following conditional expressions:
5<TTL/CT3<7.5；
wherein, TTL is an axial distance from the object-side surface S1 of the first lens L1 to the image plane IMG, and CT3 is an axial thickness of the third lens L3.
In this way, by appropriately matching the relationship between the center thickness and the total optical length of the third lens L3, the optical imaging system 10 can be advantageously downsized and lightened. However, above the upper limit of the relation, the total length of the optical imaging system 10 is too long, which is disadvantageous for miniaturization, and below the lower limit of the relation, the lens thickness is large, and the weight reduction of the optical imaging system 10 is not employed due to the large density of the glass lens.
First embodiment
Referring to fig. 1 and fig. 2, the optical imaging system 10 of the first embodiment includes, in order from an object side to an image side: a first lens L1 having a negative bending force, a second lens L2 having a positive bending force, a stop STO, a third lens L3 having a positive bending force, a fourth lens L4 having a positive bending force, a fifth lens L5 having a negative bending force, a sixth lens L6 having a positive bending force, a filter L7, and a protective glass L8.
The object-side surface S1 of the first lens element L1 is a plane, and the image-side surface S2 is a concave surface; the object-side surface S3 of the second lens element L2 is convex, and the image-side surface S4 is convex; the object-side surface S6 of the third lens element L3 is concave, and the image-side surface S7 is convex; the object-side surface S8 of the fourth lens element L4 is convex, and the image-side surface is convex; the object-side surface S9 of the fifth lens element L5 is concave, and the image-side surface is concave; the object-side surface S10 of the sixth lens element L6 is convex, and the image-side surface S11 is convex.
The reference wavelength of the optical imaging system in the first embodiment is 546.074nm, and the optical imaging system 10 in the first embodiment has the following specific parameters, the unit of the Y radius, the thickness, and the effective focal length being millimeters (mm).
TABLE 1
It should be noted that f is the effective focal length of the optical imaging system 10, FNO is the f-number of the optical imaging system 10, and FOV is the maximum field angle of the optical imaging system 10.
TABLE 2
| Number of noodles | 11 | Number of noodles | 11 |
| K | 6.758E+00 | A12 | 0.000E+00 |
| A4 | 2.054E-03 | A14 | 0.000E+00 |
| A6 | 2.643E-05 | A16 | 0.000E+00 |
| A8 | 2.682E-06 | A18 | 0.000E+00 |
| A10 | -2.960E-08 | A20 | 0.000E+00 |
The image-side surface S11 of the sixth lens element L6 is aspheric. The aspherical surface has a surface shape determined by the following formula:
where Z is the longitudinal distance from any point on the aspherical surface to the surface vertex, r is the distance from any point on the aspherical surface to the optical axis, c is the vertex curvature (reciprocal of the radius of curvature), k is a conic constant, and Ai is a correction coefficient of order i-th of the aspherical surface, and table 2 gives the high-order term coefficients K, A4, a6, a8, a10 … … that can be used for the image side S11 in the first embodiment.
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 less than 0.04mm after light rays with wavelengths of 656.2725nm, 587.5618nm, 546.0740nm, 486.1327nm and 435.8343nm pass through the lenses of the optical imaging system 10; the reference wavelength of astigmatism and distortion is 546.0740nm, and the astigmatism curves represent meridional image surface curvature and sagittal image surface curvature, wherein the maximum values of arc loss field curvature and meridional field curvature are both less than 0.05 mm; the distortion curve represents the distortion magnitude values for different angles of view, with the maximum distortion being less than 50%. 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 and fig. 4, the optical imaging system 10 of the second embodiment includes, in order from an object side to an image side: a first lens L1 having a negative bending force, a second lens L2 having a positive bending force, a stop STO, a third lens L3 having a positive bending force, a fourth lens L4 having a positive bending force, a fifth lens L5 having a negative bending force, a sixth lens L6 having a positive bending force, a filter L7, and a protective glass L8.
The object-side surface S1 of the first lens element L1 is a plane, and the image-side surface S2 is a concave surface; the object-side surface S3 of the second lens element L2 is convex, and the image-side surface S4 is convex; the object-side surface S6 of the third lens element L3 is concave, and the image-side surface S7 is convex; the object-side surface S8 of the fourth lens element L4 is convex, and the image-side surface is convex; the object-side surface S9 of the fifth lens element L5 is concave, and the image-side surface is concave; the object-side surface S10 of the sixth lens element L6 is convex, and the image-side surface S11 is convex.
The reference wavelength of the optical imaging system 10 in the second embodiment is 546.074nm, and the optical imaging system 10 in the second embodiment has the following specific parameters, the units of the Y radius, the thickness, and the effective focal length are all millimeters (mm).
TABLE 3
It should be noted that f is the effective focal length of the optical imaging system 10, FNO is the f-number of the optical imaging system 10, and FOV is the maximum field angle of the optical imaging system 10.
TABLE 4
| Number of noodles | 11 | Number of noodles | 11 |
| K | 4.458E+00 | A12 | 0.000E+00 |
| A4 | 1.906E-03 | A14 | 0.000E+00 |
| A6 | 2.674E-05 | A16 | 0.000E+00 |
| A8 | 1.205E-06 | A18 | 0.000E+00 |
| A10 | 3.241E-08 | A20 | 0.000E+00 |
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 show that the convergent focus deviation values of light rays with wavelengths of 656.2725nm, 587.5618nm, 546.0740nm, 486.1327nm and 435.8343nm are all less than 0.04mm after passing through the lenses of the optical imaging system 10; the reference wavelength of astigmatism and distortion is 546.0740nm, and the astigmatism curves represent meridional image surface curvature and sagittal image surface curvature, wherein the maximum values of arc loss field curvature and meridional field curvature are both less than 0.05 mm; the distortion curve represents the distortion magnitude values for different angles of view, with the maximum distortion being less than 50%. 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 and fig. 6, the optical imaging system 10 of the third embodiment includes, in order from an object side to an image side: a first lens L1 having a negative bending force, a second lens L2 having a positive bending force, a stop STO, a third lens L3 having a positive bending force, a fourth lens L4 having a positive bending force, a fifth lens L5 having a negative bending force, a sixth lens L6 having a positive bending force, a filter L7, and a protective glass L8.
The object-side surface S1 of the first lens element L1 is a plane, and the image-side surface S2 is a concave surface; the object-side surface S3 of the second lens element L2 is convex, and the image-side surface S4 is convex; the object-side surface S6 of the third lens element L3 is concave, and the image-side surface S7 is convex; the object-side surface S8 of the fourth lens element L4 is convex, and the image-side surface is convex; the object-side surface S9 of the fifth lens element L5 is concave, and the image-side surface is concave; the object-side surface S10 of the sixth lens element L6 is convex, and the image-side surface S11 is convex.
The reference wavelength of the optical imaging system 10 in the third embodiment is 546.074nm, and the optical imaging system 10 in the third embodiment has the following specific parameters, the unit of the Y radius, the thickness, and the effective focal length being millimeters (mm).
TABLE 5
It should be noted that f is the effective focal length of the optical imaging system 10, FNO is the f-number of the optical imaging system 10, and FOV is the maximum field angle of the optical imaging system 10.
TABLE 6
| Number of noodles | 11 | Number of noodles | 11 |
| K | 5.230E+00 | A12 | 2.527E-09 |
| A4 | 2.038E-03 | A14 | 0.000E+00 |
| A6 | 1.148E-05 | A16 | 0.000E+00 |
| A8 | 3.992E-06 | A18 | 0.000E+00 |
| A10 | -1.389E-07 | A20 | 0.000E+00 |
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 show that the convergent focus deviation values of light rays with wavelengths of 656.2725nm, 587.5618nm, 546.0740nm, 486.1327nm and 435.8343nm are all less than 0.04mm after passing through the lenses of the optical imaging system 10; the reference wavelength of astigmatism and distortion is 546.0740nm, and the astigmatism curves represent meridional image surface curvature and sagittal image surface curvature, wherein the maximum values of arc loss field curvature and meridional field curvature are both less than 0.05 mm; the distortion curve represents the distortion magnitude values for different angles of view, with the maximum distortion being less than 50%. 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 and fig. 8, the optical imaging system 10 of the fourth embodiment includes, in order from an object side to an image side: a first lens L1 having a negative bending force, a second lens L2 having a positive bending force, a stop STO, a third lens L3 having a positive bending force, a fourth lens L4 having a positive bending force, a fifth lens L5 having a negative bending force, a sixth lens L6 having a positive bending force, a filter L7, and a protective glass L8.
The object-side surface S1 of the first lens element L1 is a plane, and the image-side surface S2 is a concave surface; the object-side surface S3 of the second lens element L2 is convex, and the image-side surface S4 is convex; the object-side surface S6 of the third lens element L3 is concave, and the image-side surface S7 is convex; the object-side surface S8 of the fourth lens element L4 is convex, and the image-side surface is convex; the object-side surface S9 of the fifth lens element L5 is concave, and the image-side surface is concave; the object-side surface S10 of the sixth lens element L6 is convex, and the image-side surface S11 is convex.
The reference wavelength of the optical imaging system 10 in the fourth embodiment is 546.074nm, and the optical imaging system 10 in the fourth embodiment has the following specific parameters, the unit of the Y radius, the thickness, and the effective focal length being millimeters (mm).
TABLE 7
It should be noted that f is the effective focal length of the optical imaging system 10, FNO is the f-number of the optical imaging system 10, and FOV is the maximum field angle of the optical imaging system 10.
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 show that the convergent focus deviation values of light rays with wavelengths of 656.2725nm, 587.5618nm, 546.0740nm, 486.1327nm and 435.8343nm are all less than 0.04mm after passing through the lenses of the optical imaging system 10; the reference wavelength of astigmatism and distortion is 546.0740nm, and the astigmatism curves represent meridional image surface curvature and sagittal image surface curvature, wherein the maximum values of arc loss field curvature and meridional field curvature are both less than 0.05 mm; the distortion curve represents the distortion magnitude values for different angles of view, with the maximum distortion being less than 50%. 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 fig. 10, an optical imaging system 10 according to the fifth embodiment includes, in order from an object side to an image side: a first lens L1 having a negative bending force, a second lens L2 having a positive bending force, a stop STO, a third lens L3 having a positive bending force, a fourth lens L4 having a positive bending force, a fifth lens L5 having a negative bending force, a sixth lens L6 having a positive bending force, a filter L7, and a protective glass L8.
The object-side surface S1 of the first lens element L1 is a plane, and the image-side surface S2 is a concave surface; the object-side surface S3 of the second lens element L2 is convex, and the image-side surface S4 is convex; the object-side surface S6 of the third lens element L3 is concave, and the image-side surface S7 is convex; the object-side surface S8 of the fourth lens element L4 is convex, and the image-side surface is convex; the object-side surface S9 of the fifth lens element L5 is concave, and the image-side surface is concave; the object-side surface S10 of the sixth lens element L6 is convex, and the image-side surface S11 is convex.
The reference wavelength of the optical imaging system 10 in the fifth embodiment is 546.074nm, and the optical imaging system 10 in the fifth embodiment has the following specific parameters, the unit of the Y radius, the thickness, and the effective focal length being millimeters (mm).
TABLE 9
It should be noted that f is the effective focal length of the optical imaging system 10, FNO is the f-number of the optical imaging system 10, and FOV is the maximum field angle of the optical imaging system 10.
| Number of noodles | 11 | Number of noodles | 11 |
| K | 1.226E+01 | A12 | 1.541E-07 |
| A4 | 2.602E-03 | A14 | 0.000E+00 |
| A6 | -2.451E-05 | A16 | 0.000E+00 |
| A8 | 2.512E-05 | A18 | 0.000E+00 |
| A10 | -2.733E-06 | A20 | 0.000E+00 |
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 show that the convergent focus deviation values of light rays with wavelengths of 656.2725nm, 587.5618nm, 546.0740nm, 486.1327nm and 435.8343nm are all less than 0.04mm after passing through the lenses of the optical imaging system 10; the reference wavelength of astigmatism and distortion is 546.0740nm, and the astigmatism curves represent meridional image surface curvature and sagittal image surface curvature, wherein the maximum values of arc loss field curvature and meridional field curvature are both less than 0.05 mm; the distortion curve represents the distortion magnitude values for different angles of view, with the maximum distortion being less than 50%. 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 and fig. 12, the optical imaging system 10 of the sixth embodiment includes, in order from an object side to an image side: a first lens L1 having a negative bending force, a second lens L2 having a positive bending force, a stop STO, a third lens L3 having a positive bending force, a fourth lens L4 having a positive bending force, a fifth lens L5 having a negative bending force, a sixth lens L6 having a positive bending force, a filter L7, and a protective glass L8.
The object-side surface S1 of the first lens element L1 is a plane, and the image-side surface S2 is a concave surface; the object-side surface S3 of the second lens element L2 is convex, and the image-side surface S4 is planar; the object-side surface S6 of the third lens element L3 is concave, and the image-side surface S7 is convex; the object-side surface S8 of the fourth lens element L4 is convex, and the image-side surface is concave; the object-side surface S9 of the fifth lens element L5 is convex, and the image-side surface is concave; the object-side surface S10 of the sixth lens element L6 is convex, and the image-side surface S11 is convex.
The reference wavelength of the optical imaging system 10 in the sixth embodiment is 546.074nm, and the optical imaging system 10 in the sixth embodiment has the following specific parameters, the unit of the Y radius, the thickness, and the effective focal length being millimeters (mm).
TABLE 11
It should be noted that f is the effective focal length of the optical imaging system 10, FNO is the f-number of the optical imaging system 10, and FOV is the maximum field angle of the optical imaging system 10.
TABLE 12
| Number of noodles | 11 | Number of noodles | 11 |
| K | 1.074E+01 | A12 | 1.638E-07 |
| A4 | 2.930E-03 | A14 | 0.000E+00 |
| A6 | -5.869E-05 | A16 | 0.000E+00 |
| A8 | 3.484E-05 | A18 | 0.000E+00 |
| A10 | -3.427E-06 | A20 | 0.000E+00 |
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, in which the longitudinal spherical aberration curves show that the values of the convergent focus deviations after light rays with wavelengths of 656.2725nm, 587.5618nm, 546.0740nm, 486.1327nm and 435.8343nm pass through the respective lenses of the optical imaging system 10 are all less than 0.04 mm; the reference wavelength of astigmatism and distortion is 546.0740nm, and the astigmatism curves represent meridional image surface curvature and sagittal image surface curvature, wherein the maximum values of arc loss field curvature and meridional field curvature are both less than 0.05 mm; the distortion curve represents the distortion magnitude values for different angles of view, with the maximum distortion being less than 50%. As can be seen from fig. 12, the optical imaging system 10 according to the sixth embodiment can achieve good imaging quality.
Seventh embodiment
Referring to fig. 13 and fig. 14, the optical imaging system 10 of the seventh embodiment includes, in order from an object side to an image side: a first lens L1 having a negative bending force, a second lens L2 having a positive bending force, a stop STO, a third lens L3 having a positive bending force, a fourth lens L4 having a positive bending force, a fifth lens L5 having a negative bending force, a sixth lens L6 having a positive bending force, a filter L7, and a protective glass L8.
The object-side surface S1 of the first lens element L1 is a plane, and the image-side surface S2 is a concave surface; the object-side surface S3 of the second lens element L2 is convex, and the image-side surface S4 is convex; the object-side surface S6 of the third lens element L3 is concave, and the image-side surface S7 is convex; the object-side surface S8 of the fourth lens element L4 is convex, and the image-side surface is concave; the object-side surface S9 of the fifth lens element L5 is convex, and the image-side surface is concave; the object-side surface S10 of the sixth lens element L6 is convex, and the image-side surface S11 is convex.
The reference wavelength of the optical imaging system 10 in the seventh embodiment is 546.074nm, and the optical imaging system 10 in the seventh embodiment has the following specific parameters, the unit of the Y radius, the thickness, and the effective focal length being millimeters (mm).
Watch 13
It should be noted that f is the effective focal length of the optical imaging system 10, FNO is the f-number of the optical imaging system 10, and FOV is the maximum field angle of the optical imaging system 10.
TABLE 14
| Number of noodles | 11 | Number of noodles | 11 |
| K | 1.123E+01 | A12 | 2.065E-07 |
| A4 | 2.957E-03 | A14 | 0.000E+00 |
| A6 | -8.632E-05 | A16 | 0.000E+00 |
| A8 | 4.179E-05 | A18 | 0.000E+00 |
| A10 | -4.283E-06 | A20 | 0.000E+00 |
Fig. 14 shows a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical imaging system 10 of the seventh embodiment, in which the longitudinal spherical aberration curves show that the values of the convergent focus deviations after light rays with wavelengths of 656.2725nm, 587.5618nm, 546.0740nm, 486.1327nm and 435.8343nm pass through the respective lenses of the optical imaging system 10 are all less than 0.04 mm; the reference wavelength of astigmatism and distortion is 546.0740nm, and the astigmatism curves represent meridional image surface curvature and sagittal image surface curvature, wherein the maximum values of arc loss field curvature and meridional field curvature are both less than 0.05 mm; the distortion curve represents the distortion magnitude values for different angles of view, with the maximum distortion being less than 50%. As can be seen from fig. 14, the optical imaging system 10 according to the seventh embodiment can achieve good imaging quality.
Table 15 shows values of f12/(CT2-CT1), (Rs6+ Rs7)/(Rs6-Rs7), f3/f, vdi, f456/f, CT5/(CT6-CT4), | Rs10/Rs9|, EDS tan (FOV/2)/f, and TTL/CT3 in the optical imaging systems 10 of the first to seventh embodiments.
Table 15
Referring to fig. 15, an image capturing module 100 according to an embodiment of the present invention 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).
Referring to fig. 16, an electronic device 200 according to an embodiment of the present invention includes a housing 210 and an image capturing module 100, wherein the image capturing module 100 is mounted on the housing 210.
The electronic device 200 of the embodiment of the present invention includes but is not limited to an electronic device supporting imaging, such as a smart phone, a tablet computer, a notebook computer, an electronic book reader, a Portable Multimedia Player (PMP), a portable phone, a video phone, a digital still camera, a mobile medical device, and a wearable device.
Referring to fig. 17, an automobile 300 according to an embodiment of the present invention includes a body 310 and an image capturing module 100, wherein the image capturing module 100 is mounted on the body 310.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention 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 invention and not for limiting, and although the present invention has been 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 invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (13)
1. An optical imaging system, comprising, in order from an object side to an image side:
the lens comprises a first lens with negative bending force, a second lens and a third lens, wherein the object side surface of the first lens is a plane, and the image side surface of the first lens is a concave surface;
the second lens with positive bending force, the object side of the second lens is a convex surface;
a third lens having a positive refracting power;
a fourth lens having a positive refracting power;
a fifth lens having a negative refracting power;
a sixth lens having a positive refracting power;
the image side surface of the fourth lens is glued with the object side surface of the fifth lens, and the image side surface of the fifth lens is glued with the object side surface of the sixth lens.
2. The optical imaging system of claim 1, wherein the optical imaging system satisfies the following conditional expression:
-10<f12/(CT2-CT1)<-8；
wherein f12 is a combined focal length of the first lens and the second lens, CT1 is a thickness of the first lens on an optical axis, and CT2 is a thickness of the second lens on the optical axis.
3. The optical imaging system of claim 1, wherein the optical imaging system satisfies the following conditional expression:
8<(Rs6+Rs7)/(Rs6-Rs7)<21；
wherein Rs6 is a radius of curvature of an object-side surface of the third lens, and Rs7 is a radius of curvature of an image-side surface of the third lens.
4. The optical imaging system of claim 1, wherein the optical imaging system satisfies the following conditional expression:
3<f3/f<6；
wherein f3 is an effective focal length of the third lens, and f is an effective focal length of the optical imaging system.
5. The optical imaging system of claim 1, wherein at least one of the fourth lens element, the fifth lens element, and the sixth lens element satisfies the following conditional expression:
vdi≤25；
wherein vdi is an abbe number of the at least one lens.
6. The optical imaging system of claim 1, wherein the optical imaging system satisfies the following conditional expression:
2.0<f456/f<3.0；
wherein f456 is a combined focal length of the fourth lens, the fifth lens and the sixth lens, and f is an effective focal length of the optical imaging system.
7. The optical imaging system of claim 1, wherein the optical imaging system satisfies the following conditional expression:
1.5<CT5/(CT6-CT4)<19；
wherein CT4 is a thickness of the fourth lens on an optical axis, CT5 is a thickness of the fifth lens on an optical axis, and CT6 is a thickness of the sixth lens on an optical axis.
8. The optical imaging system of claim 1, wherein the optical imaging system satisfies the following conditional expression:
3<|Rs10/Rs9|<50；
wherein Rs9 is a radius of curvature of an image-side surface of the fourth lens, and Rs10 is a radius of curvature of an image-side surface of the fifth lens.
9. The optical imaging system of claim 1, further comprising an aperture, wherein the optical imaging system satisfies the following conditional expression:
2.4<EDS*tan(FOV/2)/f<2.6；
and EDS is the aperture of the diaphragm, FOV is the maximum field angle of the optical imaging system, and f is the effective focal length of the optical imaging system.
10. The optical imaging system of claim 1, wherein the optical imaging system satisfies the following conditional expression:
5<TTL/CT3<7.5；
wherein, TTL is a distance on the optical axis from the object side surface of the first lens to the image plane, and CT3 is a thickness on the optical axis of the third lens.
11. An image capturing module, comprising:
the optical imaging system of any one of claims 1 to 10; and
the photosensitive element is arranged on the image side of the optical imaging system.
12. An electronic device, comprising:
a housing; and
the image capturing module as claimed in claim 11, wherein the image capturing module is mounted on the housing.
13. An automobile, comprising:
a body; and
the electronic device of claim 12, mounted on the body.
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