Optical imaging systems, imaging modules, electronic devices and automobiles

Abstract

The present application proposes an optical imaging system, which includes, from the object side to the image side, in order: a first lens with negative refractive power, the object side surface of the first lens is a plane, and the image side surface is a concave surface; a second lens with positive refractive power, the object side surface of the second lens is a convex surface; a third lens with positive refractive power; a fourth lens with positive refractive power; a fifth lens with negative refractive power; and a sixth lens with positive refractive power. The image side surface of the fourth lens is glued to the object side surface of the fifth lens, and the image side surface of the fifth lens is glued to the object side surface of the sixth lens. The above optical imaging system not only ensures high pixels, but also widens the imaging field of view, deepens the imaging depth range, and can also capture detailed information at a long distance. The present application also proposes an imaging module having the optical imaging system and an electronic device and a car having the imaging module.

Description

Technical Field

[0001] The present invention relates to the field of optical imaging technology, and in particular to an optical imaging system, an imaging module, an electronic device and a car. Background Art

[0002] With the development of the automotive industry, the technical requirements for automotive driving assistance cameras such as front view, side view, automatic cruise, driving recorder, and reversing image are getting higher and higher. The side view camera is an on-board camera used to monitor the road conditions on the left and right sides of the car. The content it monitors can be used as the video analysis content of the camera system in the driver assistance system. These contents can assist the driver to intuitively identify obstacles and pedestrians in the blind spots on the left and right sides of the car while the car is driving. At the same time, the obstacle information captured by the side view camera can be fed back to the central system of the car, and the driving computer can issue corresponding correct instructions to avoid vehicle accidents. In addition, the content monitored by the side view camera can be used as a basis for law enforcement personnel to judge various traffic accidents and vehicle violations.

[0003] In the process of implementing this application, the inventors found that there are at least the following problems in the prior art: the existing side-view camera lenses have low resolution and a small depth of field, and cannot simultaneously satisfy the presentation of long-distance details and clear imaging in a wide angle range. In addition, the details of long-distance shots cannot be accurately judged in real time to issue warnings or obstacles in a wide angle range cannot be avoided, resulting in driving risks. Summary of the invention

[0004] In view of the above, it is necessary to propose an optical imaging system, an imaging module, an electronic device and a car to solve the above problems.

[0005] The embodiment of the present application provides an optical imaging system, which includes, from the object side to the image side, the following:

[0006] A first lens having negative refractive power, wherein the object side surface of the first lens is a flat surface and the image side surface is a concave surface;

[0007] a second lens having positive refractive power, wherein the object-side surface of the second lens is a convex surface;

[0008] a third lens having positive refractive power;

[0009] a fourth lens element having positive refractive power;

[0010] a fifth lens having negative refractive power;

[0011] a sixth lens having positive refractive power;

[0012] The image side surface of the fourth lens is glued to the object side surface of the fifth lens, and the image side surface of the fifth lens is glued to the object side surface of the sixth lens.

[0013] The above-mentioned optical imaging system not only ensures high pixels, but also expands the imaging field of view, including not only an increase in the field of view angle, but also a deepening of the imaging depth range. It can capture detailed information at a long distance, while also capturing shooting images in a wide angle range. When mounted on a vehicle, the left and right driving environments of the vehicle body can be more clearly transmitted to the system for identification, or clearly displayed on the display screen, so that the driver can make accurate judgments and avoid accidents. In terms of driving records, it can provide the driver with a clear field of view and ensure the driver's safe driving. In terms of monitoring and security, detailed information can also be clearly recorded, etc., providing corresponding technical support and application guarantees in practical applications.

[0014] In some embodiments, the optical imaging system satisfies the following condition:

[0015] -10 <f12 / (CT2-CT1)<-8;

[0016] Wherein, f12 is the combined focal length of the first lens and the second lens, CT1 is the thickness of the first lens on the optical axis, and CT2 is the thickness of the second lens on the optical axis.

[0017] In this way, the combined focal length of the first lens and the second lens provides negative refractive force for the optical imaging system, which is beneficial for a large-angle light beam to enter the optical imaging system, thereby realizing a wide-angle optical imaging system. At the same time, the difference in the center thickness of a positive lens and a negative lens is used to adjust the astigmatism of the lens group, which is beneficial for improving the imaging quality of the optical imaging system.

[0018] In some embodiments, the optical imaging system satisfies the following condition:

[0019] 8<(Rs6+Rs7) / (Rs6-Rs7)<21;

[0020] Among them, Rs6 is the curvature radius of the object side surface of the third lens, and Rs7 is the curvature radius of the image side surface of the third lens.

[0021] In this way, by reasonably setting the curvature radii of the object-side surface and the image-side surface of the third lens, the curvature of the third lens can be controlled, the risk of ghost images can be reduced, and the resolution capability of the optical imaging system can be improved.

[0022] In some embodiments, the optical imaging system satisfies the following condition:

[0023] 3 <f3 / f<6;

[0024] Wherein, f3 is the effective focal length of the third lens, and f is the effective focal length of the optical imaging system.

[0025] Thus, since the light is emitted from the first lens and the second lens with strong refractive power, the marginal light is likely to produce a large field curvature when entering the image plane. Therefore, by providing a third lens with positive refractive power, it is beneficial to correct the marginal aberration and improve the imaging resolution.

[0026] In some embodiments, at least one of the fourth lens, the fifth lens, and the sixth lens satisfies the following conditional formula:

[0027] vdi≤25;

[0028] Wherein, vdi is the dispersion coefficient of the at least one lens.

[0029] This is helpful to correct chromatic aberration, improve the imaging quality of the optical imaging system, and ensure the imaging color saturation of the optical imaging system when used in a visible light environment.

[0030] In some embodiments, the optical imaging system satisfies the following condition:

[0031] 2.0 <f456 / f<3.0;

[0032] Wherein, f456 is the combined focal length of the fourth lens, the fifth lens and the sixth lens, and f is the effective focal length of the optical imaging system.

[0033] In this way, by rationally controlling the distribution of the refractive forces of the fourth lens, the fifth lens and the sixth lens, on the one hand, it is beneficial to control the height of the incident light beam emitted from the optical imaging system to reduce the higher-order aberrations of the optical imaging system and the outer diameter of the lens; on the other hand, it can correct the influence of the field curvature produced by the front lens group on the resolution.

[0034] In some embodiments, the optical imaging system satisfies the following condition:

[0035] 1.5 <CT5 / (CT6-CT4)<19;

[0036] Wherein, CT4 is the thickness of the fourth lens on the optical axis, CT5 is the thickness of the fifth lens on the optical axis, and CT6 is the thickness of the sixth lens on the optical axis.

[0037] In this way, by reasonably matching the relationship between the center thicknesses of the fourth lens, the fifth lens and the sixth lens, on the one hand, it is helpful to control the height of the incident light beam emitted from the optical imaging system to reduce the higher-order aberrations of the optical imaging system and the outer diameter of the lens, and on the other hand, it can correct the influence of the field curvature generated by the front lens group on the resolution.

[0038] In some embodiments, the optical imaging system satisfies the following condition:

[0039] 3<|Rs10 / Rs9|<50;

[0040] Wherein, Rs9 is the curvature radius of the image side surface of the fourth lens, and Rs10 is the curvature radius of the image side surface of the fifth lens.

[0041] The image side surface of the fourth lens is glued to the object side surface of the fifth lens, and the image side surface of the fifth lens is glued to the object side surface of the sixth lens. By controlling the curvature radius of the glued surface, it is beneficial to reduce the glued eccentricity of the glued lenses, and it is also beneficial to correct the aberration of optical imaging and improve the imaging quality.

[0042] In some embodiments, the optical imaging system further includes an aperture, and the optical imaging system satisfies the following conditional formula:

[0043] 2.4 <EDS*tan(FOV / 2) / f<2.6;

[0044] Wherein, EDS is the aperture of the aperture, FOV is the maximum field of view angle of the optical imaging system, and f is the effective focal length of the optical imaging system.

[0045] The size of the aperture determines the amount of light entering the optical imaging system, and the field of view angle determines the field of view range of the optical imaging system. By reasonably matching the relationship between the field of view angle, aperture diameter and effective focal length of the optical imaging system, it can ensure that the optical imaging system has sufficient image brightness and small distortion within the wide-angle imaging range, ensure that the optical imaging system has high imaging quality characteristics, and can capture the details of the subject well.

[0046] In some embodiments, the optical imaging system satisfies the following condition:

[0047] 5 <TTL / CT3<7.5;

[0048] Wherein, TTL is the distance from the object side surface of the first lens to the image plane on the optical axis, and CT3 is the thickness of the third lens on the optical axis.

[0049] In this way, by properly matching the relationship between the center thickness of the third lens and the total optical length, it is beneficial to miniaturize and lighten the optical imaging system.

[0050] The embodiment of the present application provides an imaging module, including:

[0051] The above optical imaging system; and

[0052] A photosensitive element is arranged on the image side of the optical imaging system.

[0053] The optical imaging system in the above-mentioned imaging module not only ensures high pixels but also expands the imaging field of view, including not only an increase in the field of view angle, but also a deepening of the imaging depth range. It can capture detailed information at a long distance, while also capturing shooting images in a wide angle range. When mounted on a vehicle, the left and right driving environments of the vehicle body can be more clearly transmitted to the system for identification, or clearly displayed on the display screen, making it convenient for the driver to make accurate judgments and avoid accidents. When used in driving records, it can provide the driver with a clear field of view and ensure the driver's safe driving; when used in monitoring and security, it can also clearly record detailed information, etc., providing corresponding technical support and application guarantees in practical applications.

[0054] An embodiment of the present application provides an electronic device, including:

[0055] housing; and

[0056] The above-mentioned imaging module is installed on the shell.

[0057] The optical imaging system in the above-mentioned electronic device not only ensures high pixels but also expands the imaging field of view, including not only an increase in the field of view angle range, but also a deepening of the imaging depth range. It can capture detailed information at a long distance, while also capturing shooting images in a wide angle range. When mounted in a vehicle, the left and right driving environments of the vehicle body can be more clearly transmitted to the system for identification, or clearly displayed on the display screen, so that the driver can make accurate judgments and avoid accidents. When used in driving records, it can provide the driver with a clear field of view and provide protection for the driver's safe driving; when used in monitoring and security, it can also clearly record detailed information, etc., providing corresponding technical support and application guarantees in practical applications.

[0058] An embodiment of the present application provides a car, comprising:

[0059] the entity; and

[0060] The above-mentioned imaging module is installed on the main body.

[0061] The optical imaging system in the above-mentioned automobiles not only ensures high pixels, but also expands the imaging field of view, including not only an increase in the field of view angle, but also a deepening of the imaging depth range, which can capture detailed information at a long distance, while also capturing shooting images in a wide angle range. When mounted on the vehicle, the left and right driving environments of the vehicle body can be more clearly transmitted to the system for identification, or clearly displayed on the display screen, so that the driver can make accurate judgments and avoid accidents. When used in driving records, it can provide the driver with a clear field of view and provide protection for the driver's safe driving; when used in monitoring and security, it can also clearly record detailed information, etc., providing corresponding technical support and application guarantees in practical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 Schematic diagram of the structure of the optical imaging system according to the first embodiment of the present invention.

[0063] Figure 2 Schematic diagram of spherical aberration, astigmatism and distortion of the optical imaging system of the first embodiment of the present invention.

[0064] Figure 3 Schematic diagram of the structure of an optical imaging system according to a second embodiment of the present invention.

[0065] Figure 4 Schematic diagram of spherical aberration, astigmatism and distortion of the optical imaging system of the second embodiment of the present invention.

[0066] Figure 5 Schematic diagram of the structure of an optical imaging system according to the third embodiment of the present invention.

[0067] Figure 6 Schematic diagram of spherical aberration, astigmatism and distortion of the optical imaging system of the third embodiment of the present invention.

[0068] Figure 7 4 is a schematic structural diagram of an optical imaging system according to a fourth embodiment of the present invention.

[0069] Figure 8 Schematic diagram of spherical aberration, astigmatism and distortion of the optical imaging system of the fourth embodiment of the present invention.

[0070] Fig. 9 4 is a schematic structural diagram of an optical imaging system according to a fifth embodiment of the present invention.

[0071] Fig.10 Schematic diagram of spherical aberration, astigmatism and distortion of the optical imaging system of the fifth embodiment of the present invention.

[0072] Fig.11 4 is a schematic structural diagram of an optical imaging system according to a sixth embodiment of the present invention.

[0073] Fig.12Schematic diagram of spherical aberration, astigmatism and distortion of the optical imaging system of the sixth embodiment of the present invention.

[0074] Fig.13 2 is a schematic structural diagram of an optical imaging system according to a seventh embodiment of the present invention.

[0075] Fig.14 Schematic diagram of spherical aberration, astigmatism and distortion of the optical imaging system of the seventh embodiment of the present invention.

[0076] Fig.15 It is a structural schematic diagram of an imaging module according to an embodiment of the present invention.

[0077] Fig.16 Schematic diagram of the structure of an electronic device according to an embodiment of the present invention.

[0078] Fig.17 2 is a schematic structural diagram of a car according to an embodiment of the present invention.

[0079] Main component symbols

[0080] Optical imaging system 10

[0081] First lens L1

[0082] Second lens L2

[0083] The third lens L3

[0084] The fourth lens L4

[0085] Fifth lens L5

[0086] Sixth lens L6

[0087] Filter L7

[0088] Protective glass L8

[0089] Aperture STO

[0090] Object side S1, S3, S6, S8, S9, S10, S12, S14

[0091] Like the side S2, S4, S7, S11, S13, S15

[0092] Image IMG

[0093] Photosensitive element 20

[0094] Image acquisition module 100

[0095] Electronic device 200

[0096] Housing 210

[0097] Car 300

[0098] Ontology 310 DETAILED DESCRIPTION

[0099] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0100] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0101] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0102] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0103] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0104] The reference wavelength of the material in this application is 587.56 nm.

[0105] See also Figure 1 The optical imaging system 10 provided by the embodiment of the present invention includes, from the object side to the image side, a first lens L1 with negative refractive power; a second lens L2 with positive refractive power; a third lens L3 with positive refractive power; a fourth lens L4 with positive refractive power; a fifth lens L5 with negative refractive power; and a sixth lens L6 with positive refractive power.

[0106] 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. Among them, the object-side surface S1 of the first lens L1 is a plane, and the image-side surface S2 is a concave surface, the object-side surface S3 of the second lens 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 to the object-side surface of the fifth lens L5, and the image-side surface of the fifth lens L5 is cemented to the object-side surface of the sixth lens L6.

[0107] The above-mentioned optical imaging system 10 not only ensures high pixels but also expands the imaging field of view, including not only an increase in the field of view angle range, but also a deepening of the imaging depth range, which can capture detailed information at a long distance, and can also capture shooting images in a large angle range. When mounted in a vehicle, the left and right driving environments of the vehicle body can be more clearly transmitted to the system for identification, or clearly displayed on the display screen, so that the driver can make accurate judgments and avoid accidents; in terms of driving records, it can provide the driver with a clear field of view and provide protection for the driver's safe driving; in terms of monitoring and security, detailed information can also be clearly recorded, etc., providing corresponding technical support and application guarantees in practical applications.

[0108] In some embodiments, the optical imaging system 10 further includes a filter L7, and the filter L7 has an object-side surface S12 and an image-side surface S13. The filter L7 is disposed on the image side of the sixth lens L6. The filter L7 can use a bandpass filter to cut off light in an unused band and only allow light in an imaging band (including visible light and infrared light) to pass, so that the optical imaging system 10 can be clearer when imaging and avoid interference.

[0109] In some embodiments, the optical imaging system 10 further includes a protective glass L8, and the protective glass L8 has an object side surface S14 and an image side surface 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 pass directly through it. The protective glass L8 is used to protect the photosensitive elements outside the optical imaging system 10.

[0110] When the optical imaging system 10 is used for imaging, the light emitted or reflected by the object enters the optical imaging system 10 from the object side, and passes 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 filter L7 and the protective glass L8 in sequence, and finally converges on the image plane IMG.

[0111] 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. 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 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 glass. In this case, the optical imaging system 10 can withstand higher temperatures and has better optical performance. In other embodiments, only the first lens L1 can be made of glass, while the other lenses are made of plastic. In this case, the first lens L1 closest to the object side can better withstand the influence of the ambient temperature of the object side, and because the other lenses are made of plastic, the production cost of the optical imaging system 10 is kept low. In other embodiments, the first lens L1 is made of glass, and the materials of the other lenses can be arbitrarily combined.

[0112] In some embodiments, the optical imaging system 10 satisfies the following condition:

[0113] -10 <f12 / (CT2-CT1)<-8;

[0114] Wherein, 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.

[0115] In this way, the combined focal length of the first lens L1 and the second lens L2 provides negative refractive power for the optical imaging system 10, which is beneficial for a large-angle light beam to enter the optical imaging system 10, thereby achieving a wide angle of the optical imaging system 10. At the same time, the astigmatism of the lens group is adjusted by the difference in the center thickness of a positive lens and a negative lens, which is beneficial for improving the imaging quality of the optical imaging system 10. However, if the combined focal length of the first lens L1 and the second lens L2 is higher than the upper limit of the relationship, the negative refractive power is too strong, which is prone to produce more serious edge aberrations; if the combined focal length is lower than the lower limit of the relationship, the refractive power of the combined focal length is insufficient, which is not conducive to wide angle.

[0116] In some embodiments, the optical imaging system satisfies the following condition:

[0117] 8<(Rs6+Rs7) / (Rs6-Rs7)<21;

[0118] Wherein, Rs6 is the curvature radius of the object-side surface S6 of the third lens L3, and Rs7 is the curvature radius of the image-side surface S7 of the third lens L3.

[0119] Thus, by reasonably setting the curvature radii of the object-side surface S6 and the image-side surface S7 of the third lens L3, the curvature of the third lens L3 can be controlled, the risk of ghosting can be reduced, and the resolution of the optical imaging system 10 can be improved. However, if the range of the above conditional expression is exceeded, the risk of ghosting is high and the resolution of the optical imaging system 10 is poor.

[0120] In some embodiments, the optical imaging system 10 satisfies the following condition:

[0121] 3 <f3 / f<6;

[0122] Wherein, f3 is the effective focal length of the third lens L3, and f is the effective focal length of the optical imaging system 10.

[0123] Thus, since the light rays are emitted from the first lens L1 and the second lens L2 with strong refractive power, the marginal light rays entering the image plane are prone to produce a large field curvature. Therefore, by providing a third lens L3 with positive refractive power, it is beneficial to correct the marginal aberration and improve the imaging resolution. However, if the relationship exceeds the range, it is not conducive to the correction of the aberration of the optical imaging system 10, thereby reducing the imaging quality.

[0124] In some embodiments, at least one of the fourth lens L4, the fifth lens L5, and the sixth lens L6 satisfies the following conditional formula:

[0125] vdi≤25;

[0126] Wherein, vdi is the dispersion coefficient of the at least one lens under d light.

[0127] This is conducive to correcting chromatic aberration, improving the imaging quality of the optical imaging system 10, and ensuring the imaging color saturation of the optical imaging system 10 when used in a visible light environment. However, if the range of the relationship is exceeded, it is not conducive to correcting chromatic aberration, and the imaging quality of the optical imaging system 10 is poor.

[0128] In some embodiments, the optical imaging system 10 satisfies the following condition:

[0129] 2.0 <f456 / f<3.0;

[0130] Wherein, f456 is the combined focal length of the fourth lens L4, the fifth lens L5 and the sixth lens L6, and f is the effective focal length of the optical imaging system 10.

[0131] In this way, by reasonably controlling the distribution of the refractive power of the fourth lens L4, the fifth lens L5 and the sixth lens L6, on the one hand, it is beneficial to control the incident light height of the light beam emitted from the optical imaging system 10, so as to reduce the higher-order aberrations of the optical imaging system 10 and the outer diameter of the lens, and on the other hand, it can correct the influence of the field curvature generated by the front lens group on the resolution. However, exceeding the range of the relationship is not conducive to controlling the incident light height of the light beam emitted from the optical imaging system 10, and is not conducive to correcting the influence of the field curvature generated by the front lens group on the resolution.

[0132] In some embodiments, the optical imaging system 10 satisfies the following condition:

[0133] 1.5 <CT5 / (CT6-CT4)<19;

[0134] Wherein, 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.

[0135] Thus, by properly matching the relationship between the center thicknesses of the fourth lens L4, the fifth lens L5, and the sixth lens L6, it is beneficial to control the height of the incident light beam emitted from the optical imaging system 10 on the one hand, so as to reduce the higher-order aberrations of the optical imaging system 10 and the outer diameter of the lens, and on the other hand, it is beneficial to correct the effect of the field curvature generated by the front lens group on the resolution. However, if the relationship exceeds the range, it is not beneficial to control the height of the incident light beam emitted from the optical imaging system 10, and it is not beneficial to correct the effect of the field curvature generated by the front lens group on the resolution.

[0136] In some embodiments, the optical imaging system 10 satisfies the following condition:

[0137] 3<|Rs10 / Rs9|<50;

[0138] Here, Rs9 is the curvature radius of the image side surface of the fourth lens L4, and Rs10 is the curvature radius of the image side surface of the fifth lens L5.

[0139] The image side surface of the fourth lens L4 is glued to the object side surface of the fifth lens L5, and the image side surface of the fifth lens L5 is glued to the object side surface of the sixth lens L6. By controlling the curvature radius of the glued surface, it is beneficial to reduce the glued eccentricity of the glued lens, and at the same time, it is beneficial to correct the aberration of the optical imaging system 10 and improve the imaging quality. However, if it is higher than the upper limit of the relationship, the flatter the glued surface is, it is not conducive to the correction of the aberration of the optical imaging system 10; if it is lower than the lower limit of the relationship, the glued surface is too curved, and the glued process of the fifth lens L5 and the sixth lens L6 is ignored, which increases the process difficulty, increases the glued eccentricity tolerance range, reduces the production yield, and is not conducive to reducing costs.

[0140] In some embodiments, the optical imaging system 10 further includes an aperture STO, and the optical imaging system 10 satisfies the following conditional expression:

[0141] 2.4 <EDS*tan(FOV / 2) / f<2.6;

[0142] Wherein, EDS is the aperture of the aperture 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 .

[0143] The size of the aperture STO determines the amount of light entering the optical imaging system 10, and the field of view angle determines the field of view range of the optical imaging system 10. By reasonably matching the field of view angle of the optical imaging system 10, the aperture of the aperture STO and the effective focal length, it is possible to ensure that the optical imaging system 10 has sufficient image brightness and a small amount of distortion within the wide-angle imaging range, and to ensure that the optical imaging system 10 has high imaging quality characteristics and can capture the details of the subject well. However, exceeding the range of the relationship is not conducive to the optical imaging system having sufficient image brightness and a small amount of distortion within the wide-angle imaging range.

[0144] In some embodiments, the optical imaging system 10 satisfies the following condition:

[0145] 5 <TTL / CT3<7.5;

[0146] Wherein, TTL is the distance from the object side surface S1 of the first lens L1 to the image surface IMG on the optical axis, and CT3 is the thickness of the third lens L3 on the optical axis.

[0147] In this way, by properly matching the relationship between the center thickness of the third lens L3 and the total optical length, it is beneficial to the miniaturization and lightness of the optical imaging system 10. However, if it is higher than the upper limit of the relationship, the total length of the optical imaging system 10 is too long, which is not conducive to miniaturization, and if it is lower than the lower limit of the relationship, the lens thickness is relatively large, and since the density of the glass lens is relatively large, the lightness of the optical imaging system 10 is not utilized.

[0148] First embodiment

[0149] Please also see Figure 1 and Figure 2 The optical imaging system 10 of the first embodiment includes, from the object side to the image side, a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, an aperture STO, a third lens L3 with positive refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, a sixth lens L6 with positive refractive power, a filter L7 and a protective glass L8.

[0150] The object-side surface S1 of the first lens L1 is a plane, and the image-side surface S2 is a concave surface; the object-side surface S3 of the second lens L2 is a convex surface, and the image-side surface S4 is a convex surface; the object-side surface S6 of the third lens L3 is a concave surface, and the image-side surface S7 is a convex surface; the object-side surface S8 of the fourth lens L4 is a convex surface, and the image-side surface is a convex surface; the object-side surface S9 of the fifth lens L5 is a concave surface, and the image-side surface is a concave surface; the object-side surface S10 of the sixth lens L6 is a convex surface, and the image-side surface S11 is a convex surface.

[0151] The reference wavelength of the optical imaging system in the first embodiment is 546.074 nm, and the specific parameters of the optical imaging system 10 in the first embodiment are as follows, where the units of the Y radius, thickness and effective focal length are all millimeters (mm).

[0152] Table 1

[0153]

[0154] It should be noted that f is the effective focal length of the optical imaging system 10 , FNO is the aperture number of the optical imaging system 10 , and FOV is the maximum field of view of the optical imaging system 10 .

[0155] Table 2

[0156] Surface number 11 Surface number 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

[0157] It should be noted that the image side surface S11 of the sixth lens L6 is an aspherical surface. The shape of the aspherical surface is determined by the following formula:

[0158]

[0159] Among them, Z is the longitudinal distance between any point on the aspheric surface and the surface vertex, r is the distance from any point on the aspheric surface to the optical axis, c is the vertex curvature (the inverse of the radius of curvature), k is the cone constant, Ai is the i-th order correction coefficient of the aspheric surface, and Table 2 gives the high-order coefficients K, A4, A6, A8, A10... that can be used for the image side S11 in Example 1.

[0160] Figure 2The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging system 10 of the first embodiment are shown, wherein the longitudinal spherical aberration curve indicates that 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 deviation of the focus point is less than 0.04mm; the reference wavelength of astigmatism and distortion is 546.0740nm, the astigmatism curve indicates the meridional image curvature and sagittal image curvature, wherein the maximum values ​​of the arc field curvature and the meridional field curvature are both less than 0.05mm; the distortion curve indicates the distortion magnitude values ​​corresponding to different field angles, wherein the maximum distortion is less than 50%. According to Figure 2 It can be seen that the optical imaging system 10 provided in the first embodiment can achieve good imaging quality.

[0161] Second embodiment

[0162] Please also see Figure 3 and Figure 4 The optical imaging system 10 of the second embodiment includes, from the object side to the image side, a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, an aperture STO, a third lens L3 with positive refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, a sixth lens L6 with positive refractive power, a filter L7 and a protective glass L8.

[0163] The object-side surface S1 of the first lens L1 is a plane, and the image-side surface S2 is a concave surface; the object-side surface S3 of the second lens L2 is a convex surface, and the image-side surface S4 is a convex surface; the object-side surface S6 of the third lens L3 is a concave surface, and the image-side surface S7 is a convex surface; the object-side surface S8 of the fourth lens L4 is a convex surface, and the image-side surface is a convex surface; the object-side surface S9 of the fifth lens L5 is a concave surface, and the image-side surface is a concave surface; the object-side surface S10 of the sixth lens L6 is a convex surface, and the image-side surface S11 is a convex surface.

[0164] The reference wavelength of the optical imaging system 10 in the second embodiment is 546.074 nm, and the specific parameters of the optical imaging system 10 in the second embodiment are as follows, where the units of the Y radius, thickness and effective focal length are all millimeters (mm).

[0165] Table 3

[0166]

[0167] It should be noted that f is the effective focal length of the optical imaging system 10 , FNO is the aperture number of the optical imaging system 10 , and FOV is the maximum field of view of the optical imaging system 10 .

[0168] Table 4

[0169] Surface number 11 Surface number 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

[0170] Figure 4 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging system 10 of the second embodiment are shown, wherein the longitudinal spherical aberration curve indicates that 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 deviation of the focus point is less than 0.04mm; the reference wavelength of astigmatism and distortion is 546.0740nm, the astigmatism curve indicates the meridian image curvature and sagittal image curvature, wherein the maximum values ​​of the arc field curvature and the meridian field curvature are both less than 0.05mm; the distortion curve indicates the distortion magnitude values ​​corresponding to different field angles, wherein the maximum distortion is less than 50%. According to Figure 4 It can be seen that the optical imaging system 10 provided in the second embodiment can achieve good imaging quality.

[0171] Third embodiment

[0172] Please also see Figure 5 and Figure 6 The optical imaging system 10 of the third embodiment includes, from the object side to the image side, a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, an aperture STO, a third lens L3 with positive refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, a sixth lens L6 with positive refractive power, a filter L7 and a protective glass L8.

[0173] The object-side surface S1 of the first lens L1 is a plane, and the image-side surface S2 is a concave surface; the object-side surface S3 of the second lens L2 is a convex surface, and the image-side surface S4 is a convex surface; the object-side surface S6 of the third lens L3 is a concave surface, and the image-side surface S7 is a convex surface; the object-side surface S8 of the fourth lens L4 is a convex surface, and the image-side surface is a convex surface; the object-side surface S9 of the fifth lens L5 is a concave surface, and the image-side surface is a concave surface; the object-side surface S10 of the sixth lens L6 is a convex surface, and the image-side surface S11 is a convex surface.

[0174] The reference wavelength of the optical imaging system 10 in the third embodiment is 546.074 nm, and the specific parameters of the optical imaging system 10 in the third embodiment are as follows, where the units of the Y radius, thickness and effective focal length are all millimeters (mm).

[0175] Table 5

[0176]

[0177] It should be noted that f is the effective focal length of the optical imaging system 10 , FNO is the aperture number of the optical imaging system 10 , and FOV is the maximum field of view of the optical imaging system 10 .

[0178] Table 6

[0179] Surface number 11 Surface number 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

[0180] Figure 6 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging system 10 of the third embodiment are shown, wherein the longitudinal spherical aberration curve indicates that 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 deviation of the focus point is less than 0.04mm; the reference wavelength of astigmatism and distortion is 546.0740nm, the astigmatism curve indicates the meridian image curvature and sagittal image curvature, wherein the maximum values ​​of the arc field curvature and the meridian field curvature are both less than 0.05mm; the distortion curve indicates the distortion magnitude values ​​corresponding to different field angles, wherein the maximum distortion is less than 50%. According to Figure 6 It can be seen that the optical imaging system 10 provided in the third embodiment can achieve good imaging quality.

[0181] Fourth embodiment

[0182] Please also see Figure 7 and Figure 8 The optical imaging system 10 of the fourth embodiment includes, from the object side to the image side, a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, an aperture STO, a third lens L3 with positive refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, a sixth lens L6 with positive refractive power, a filter L7 and a protective glass L8.

[0183] The object-side surface S1 of the first lens L1 is a plane, and the image-side surface S2 is a concave surface; the object-side surface S3 of the second lens L2 is a convex surface, and the image-side surface S4 is a convex surface; the object-side surface S6 of the third lens L3 is a concave surface, and the image-side surface S7 is a convex surface; the object-side surface S8 of the fourth lens L4 is a convex surface, and the image-side surface is a convex surface; the object-side surface S9 of the fifth lens L5 is a concave surface, and the image-side surface is a concave surface; the object-side surface S10 of the sixth lens L6 is a convex surface, and the image-side surface S11 is a convex surface.

[0184] The reference wavelength of the optical imaging system 10 in the fourth embodiment is 546.074 nm, and the specific parameters of the optical imaging system 10 in the fourth embodiment are as follows, where the units of the Y radius, thickness and effective focal length are all millimeters (mm).

[0185] Table 7

[0186]

[0187] It should be noted that f is the effective focal length of the optical imaging system 10 , FNO is the aperture number of the optical imaging system 10 , and FOV is the maximum field of view of the optical imaging system 10 .

[0188] Table 8

[0189]

[0190]

[0191] Figure 8 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging system 10 of the fourth embodiment are shown, wherein the longitudinal spherical aberration curve indicates that 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 deviation of the focus point is less than 0.04mm; the reference wavelength of astigmatism and distortion is 546.0740nm, the astigmatism curve indicates the meridional image curvature and sagittal image curvature, wherein the maximum values ​​of the arc field curvature and the meridional field curvature are both less than 0.05mm; the distortion curve indicates the distortion magnitude values ​​corresponding to different field angles, wherein the maximum distortion is less than 50%. According to Figure 8 It can be seen that the optical imaging system 10 provided in the fourth embodiment can achieve good imaging quality.

[0192] Fifth embodiment

[0193] Please also see Fig. 9 and Fig.10 The optical imaging system 10 of the fifth embodiment includes, from the object side to the image side, a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, an aperture STO, a third lens L3 with positive refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, a sixth lens L6 with positive refractive power, a filter L7 and a protective glass L8.

[0194] The object-side surface S1 of the first lens L1 is a plane, and the image-side surface S2 is a concave surface; the object-side surface S3 of the second lens L2 is a convex surface, and the image-side surface S4 is a convex surface; the object-side surface S6 of the third lens L3 is a concave surface, and the image-side surface S7 is a convex surface; the object-side surface S8 of the fourth lens L4 is a convex surface, and the image-side surface is a convex surface; the object-side surface S9 of the fifth lens L5 is a concave surface, and the image-side surface is a concave surface; the object-side surface S10 of the sixth lens L6 is a convex surface, and the image-side surface S11 is a convex surface.

[0195] The reference wavelength of the optical imaging system 10 in the fifth embodiment is 546.074 nm, and the specific parameters of the optical imaging system 10 in the fifth embodiment are as follows, where the units of the Y radius, thickness and effective focal length are all millimeters (mm).

[0196] Table 9

[0197]

[0198]

[0199] It should be noted that f is the effective focal length of the optical imaging system 10 , FNO is the aperture number of the optical imaging system 10 , and FOV is the maximum field of view of the optical imaging system 10 .

[0200] Table 10

[0201] Surface number 11 Surface number 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

[0202] Fig.10 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging system 10 of the fifth embodiment are shown, wherein the longitudinal spherical aberration curve indicates that 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 deviation of the focus point is less than 0.04mm; the reference wavelength of astigmatism and distortion is 546.0740nm, the astigmatism curve indicates the meridional image curvature and sagittal image curvature, wherein the maximum values ​​of the arc field curvature and the meridional field curvature are both less than 0.05mm; the distortion curve indicates the distortion magnitude values ​​corresponding to different field angles, wherein the maximum distortion is less than 50%. According to Fig.10 It can be seen that the optical imaging system 10 provided in the fifth embodiment can achieve good imaging quality.

[0203] Sixth embodiment

[0204] Please also see Fig.11 and Fig.12 The optical imaging system 10 of the sixth embodiment includes, from the object side to the image side, a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, an aperture STO, a third lens L3 with positive refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, a sixth lens L6 with positive refractive power, a filter L7 and a protective glass L8.

[0205] The object-side surface S1 of the first lens L1 is a plane, and the image-side surface S2 is a concave surface; the object-side surface S3 of the second lens L2 is a convex surface, and the image-side surface S4 is a plane; the object-side surface S6 of the third lens L3 is a concave surface, and the image-side surface S7 is a convex surface; the object-side surface S8 of the fourth lens L4 is a convex surface, and the image-side surface is a concave surface; the object-side surface S9 of the fifth lens L5 is a convex surface, and the image-side surface is a concave surface; the object-side surface S10 of the sixth lens L6 is a convex surface, and the image-side surface S11 is a convex surface.

[0206] The reference wavelength of the optical imaging system 10 in the sixth embodiment is 546.074 nm, and the specific parameters of the optical imaging system 10 in the sixth embodiment are as follows, where the units of the Y radius, thickness and effective focal length are all millimeters (mm).

[0207] Table 11

[0208]

[0209]

[0210] It should be noted that f is the effective focal length of the optical imaging system 10 , FNO is the aperture number of the optical imaging system 10 , and FOV is the maximum field of view of the optical imaging system 10 .

[0211] Table 12

[0212] Surface number 11 Surface number 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

[0213] Fig.12 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging system 10 of the sixth embodiment are shown, wherein the longitudinal spherical aberration curve indicates that 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 deviation of the focus point is less than 0.04mm; the reference wavelength of astigmatism and distortion is 546.0740nm, the astigmatism curve indicates the meridian image curvature and sagittal image curvature, wherein the maximum values ​​of the arc field curvature and the meridian field curvature are both less than 0.05mm; the distortion curve indicates the distortion magnitude values ​​corresponding to different field angles, wherein the maximum distortion is less than 50%. According to Fig.12 It can be seen that the optical imaging system 10 provided in the sixth embodiment can achieve good imaging quality.

[0214] Seventh embodiment

[0215] Please also see Fig.13 and Fig.14 The optical imaging system 10 of the seventh embodiment includes, from the object side to the image side, a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, an aperture STO, a third lens L3 with positive refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, a sixth lens L6 with positive refractive power, a filter L7 and a protective glass L8.

[0216] The object-side surface S1 of the first lens L1 is a plane, and the image-side surface S2 is a concave surface; the object-side surface S3 of the second lens L2 is a convex surface, and the image-side surface S4 is a convex surface; the object-side surface S6 of the third lens L3 is a concave surface, and the image-side surface S7 is a convex surface; the object-side surface S8 of the fourth lens L4 is a convex surface, and the image-side surface is a concave surface; the object-side surface S9 of the fifth lens L5 is a convex surface, and the image-side surface is a concave surface; the object-side surface S10 of the sixth lens L6 is a convex surface, and the image-side surface S11 is a convex surface.

[0217] The reference wavelength of the optical imaging system 10 in the seventh embodiment is 546.074 nm, and the specific parameters of the optical imaging system 10 in the seventh embodiment are as follows, where the units of the Y radius, thickness and effective focal length are all millimeters (mm).

[0218] Table 13

[0219]

[0220]

[0221] It should be noted that f is the effective focal length of the optical imaging system 10 , FNO is the aperture number of the optical imaging system 10 , and FOV is the maximum field of view of the optical imaging system 10 .

[0222] Table 14

[0223] Surface number 11 Surface number 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

[0224] Fig.14 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging system 10 of the seventh embodiment are shown, wherein the longitudinal spherical aberration curve indicates that 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 deviation of the focus point is less than 0.04mm; the reference wavelength of astigmatism and distortion is 546.0740nm, the astigmatism curve indicates the meridional image curvature and sagittal image curvature, wherein the maximum values ​​of the arc field curvature and the meridional field curvature are both less than 0.05mm; the distortion curve indicates the distortion magnitude values ​​corresponding to different field angles, wherein the maximum distortion is less than 50%. According to Fig.14 It can be seen that the optical imaging system 10 provided in the seventh embodiment can achieve good imaging quality.

[0225] Table 15 shows the 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 system 10 of the first to seventh embodiments.

[0226] Form 15

[0227]

[0228]

[0229] See also Fig.15 The imaging module 100 of the embodiment of the present invention includes an optical imaging system 10 and a photosensitive element 20 , and the photosensitive element 20 is arranged on the image side of the optical imaging system 10 .

[0230] Specifically, the photosensitive element 20 may be a complementary metal oxide semiconductor (CMOS) image sensor or a charge-coupled device (CCD).

[0231] See also Fig.16 The electronic device 200 according to the embodiment of the present invention includes a housing 210 and an imaging module 100 , and the imaging module 100 is mounted on the housing 210 .

[0232] The electronic device 200 of the embodiment of the present invention includes but is not limited to smart phones, tablet computers, laptop computers, e-book readers, portable multimedia players (PMPs), portable phones, video phones, digital still cameras, mobile medical devices, wearable devices and other electronic devices that support imaging.

[0233] See also Fig.17 The automobile 300 according to the embodiment of the present invention includes a body 310 and an imaging module 100 , and the imaging module 100 is mounted on the body 310 .

[0234] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all variations that fall within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0235] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. An optical imaging system, characterized in that: From the object side to the image side, it includes: A first lens having negative refractive power, wherein the object side surface of the first lens is a flat surface and the image side surface is a concave surface; a second lens having positive refractive power, wherein the object-side surface of the second lens is a convex surface; a third lens having positive refractive power, wherein the object-side surface of the third lens is concave and the image-side surface is convex; a fourth lens having positive refractive power, wherein the object side surface of the fourth lens is a convex surface; a fifth lens having negative refractive power, wherein the image side surface of the fifth lens is a concave surface; a sixth lens having positive refractive power, wherein the object-side surface of the sixth lens is convex and the image-side surface is convex; The image side surface of the fourth lens is glued to the object side surface of the fifth lens, and the image side surface of the fifth lens is glued to the object side surface of the sixth lens; The optical imaging system satisfies the following conditional formula: 3<|Rs10 / Rs9|<50; Wherein, Rs9 is the curvature radius of the image side surface of the fourth lens, and Rs10 is the curvature radius of the image side surface of the fifth lens.

2. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following conditional formula: -10 <f12 / (CT2-CT1)<-8; Wherein, f12 is the combined focal length of the first lens and the second lens, CT1 is the thickness of the first lens on the optical axis, and CT2 is the thickness of the second lens on the optical axis.

3. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following conditional formula: 8<(Rs6+Rs7) / (Rs6-Rs7)<21; Among them, Rs6 is the curvature radius of the object side surface of the third lens, and Rs7 is the curvature radius of the image side surface of the third lens.

4. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following conditional formula: 3 <f3 / f<6; Wherein, f3 is the effective focal length of the third lens, and f is the effective focal length of the optical imaging system.

5. The optical imaging system according to claim 1, wherein: At least one of the fourth lens, the fifth lens and the sixth lens satisfies the following conditional formula: vdi≤25; Wherein, vdi is the dispersion coefficient of the at least one lens.

6. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following conditional formula: 2.0 <f456 / f<3.0; Wherein, f456 is the combined focal length of the fourth lens, the fifth lens and the sixth lens, and f is the effective focal length of the optical imaging system.

7. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following conditional formula: 1.5 <CT5 / (CT6-CT4)<19; Wherein, CT4 is the thickness of the fourth lens on the optical axis, CT5 is the thickness of the fifth lens on the optical axis, and CT6 is the thickness of the sixth lens on the optical axis.

8. The optical imaging system according to claim 1, wherein: The optical imaging system further includes an aperture, and the optical imaging system satisfies the following conditional formula: 2.4 <EDS*tan(FOV / 2) / f<2.6; Wherein, EDS is the aperture of the aperture, FOV is the maximum field of view angle of the optical imaging system, and f is the effective focal length of the optical imaging system.

9. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following conditional formula: 5 <TTL / CT3<7.5; Wherein, TTL is the distance from the object side surface of the first lens to the image plane on the optical axis, and CT3 is the thickness of the third lens on the optical axis.

10. An imaging module, characterized in that: include: The optical imaging system according to any one of claims 1 to 9; and A photosensitive element is arranged on the image side of the optical imaging system.

11. An electronic device, characterized in that: include: case; And the imaging module as described in claim 10, wherein the imaging module is mounted on the housing.

12. A car, characterized in that: include: ontology; and The imaging module as described in claim 10 is mounted on the main body.

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