CN213986978U

CN213986978U - Optical imaging system, camera module, electronic device and automobile

Info

Publication number: CN213986978U
Application number: CN202022977305.1U
Authority: CN
Inventors: 党绪文; 刘彬彬; 李明
Original assignee: Jiangxi Jingchao Optical Co Ltd
Current assignee: Jiangxi Jingchao Optical Co Ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-08-17
Anticipated expiration: 2030-12-08

Abstract

The utility model discloses an optical imaging system, the module of making a video recording, electron device and car, follow the order of optical axis from the thing side to picture side, optical imaging system is including the first lens that has positive refractive power, the second lens that has refractive power and the third lens that has refractive power, the object side of first lens is the convex surface in passing optical axis department, the image side of second lens is the convex surface near the circumference, the image side of third lens is the convex surface near the circumference, the object side and the image side of third lens are the aspheric surface, at least one face in the object side and the image side of third lens is provided with at least one inflection point, optical imaging system still satisfies: 55.0deg < FOV/FNO < 71.0deg, wherein FOV represents the object space field angle corresponding to the maximum imaging circle on the imaging plane, and FNO represents the f-number. The optical imaging system is beneficial to improving the imaging quality and the light and thin design, and can accurately capture and identify light and image positions.

Description

Optical imaging system, camera module, electronic device and automobile

Technical Field

The utility model relates to an optical imaging technical field, in particular to optical imaging system, module, electron device and car of making a video recording.

Background

Compared with visible light identification, the infrared imaging lens group has the advantages of all-weather identification and high identification rate, and is higher in safety and wider in application scene as a non-contact identification implementation mode. At present, an infrared imaging lens group is widely applied, but the problems that a customized lens group is large in size, the relative illumination of the edge is fast attenuated, the recognition rate and the recognition accuracy are not high in the environments of strong light and weak light and the like exist.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an embodiment provides an optical imaging system, module, electron device and car of making a video recording.

An embodiment of the present invention provides an optical imaging system, in order from an object side to an image side along an optical axis, the optical imaging system including:

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

a second lens element with refractive power having a convex image-side surface near its circumference;

the image side surface of the third lens element is a convex surface near the circumference, both the object side surface and the image side surface of the third lens element are aspheric, and at least one of the object side surface and the image side surface of the third lens element is provided with at least one inflection point;

the optical imaging system further satisfies the following relation:

55.0deg＜FOV/FNO＜71.0deg；

wherein, FOV represents the object space field angle corresponding to the maximum imaging circle on the imaging surface of the optical imaging system, and FNO represents the f-number of the optical imaging system.

Above-mentioned optical imaging system, through refractive power and face type rational configuration, be favorable to promoting optical imaging system's imaging quality, and be favorable to optical imaging system overall structure's frivolous design, satisfy the injecing back of above-mentioned formula, can provide great angle of vision, thereby the distortion is rationally controlled, for optical imaging system provides wider identification range, thereby can carry out accurate seizure and discernment to light and image position, can reduce the aperture value simultaneously, promote the aperture diameter, increase the light inlet quantity, and then can increase the relative illuminance of marginal visual field, thereby can further accurately catch and discern the position of light and image.

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

0.74＜TTL/(IMGH*2)＜0.91；

wherein TTL denotes a distance on the optical axis from an object-side surface of the first lens element to the imaging surface, and IMGH denotes a radius of a maximum imaging circle on the imaging surface of the optical imaging system.

Through the limitation of the relational expression and the reasonable refractive power configuration of the lens group, the optical imaging system can obtain good lightness and thinness, has good aberration balance and image quality improvement capability, and can support a high-pixel electronic photosensitive chip. The TTL of the optical imaging system is easy to compress, so that the total length of the optical imaging system is short, and the optical imaging system can meet the light and thin design; IMGH has decided the size of electron sensitization chip, satisfies the above formula, can let optical imaging system support bigger size's electron sensitization chip, and then makes optical imaging system have high pixel to can carry out accurate seizure and discernment to light and image position, improve optical imaging system's imaging quality.

RI/|f3|*SD32＜67.0；

wherein RI represents a relative illuminance of an imaging circle on the imaging surface of the optical imaging system at a radius of 2.3mm, f3 represents a focal length of the third lens, and SD32 represents a vertical distance from the optical axis at the maximum effective diameter of the image-side surface of the third lens.

Through the limitation of the relational expression and through reasonably increasing FNO, good refractive power distribution and surface type combination, the relative illumination of the optical imaging system is greatly improved, the uniformity of the relative illumination of each part can be ensured in an effective imaging range, the improvement of the identification accuracy based on images is facilitated, and the strong light and night identification probability is improved; the third lens can provide positive refractive power and negative refractive power, so that the requirement of matching the light incidence angles of different electronic photosensitive chips is easily met; the surface shape of the third lens is adjusted, and sufficient primary astigmatism, distortion and coma can be generated, so that good balance is formed between the third lens and aberration generated by the first lens and the second lens, the whole aberration control of an optical imaging system is facilitated, and the resolving power is improved; the above formula is satisfied, and the aperture of the image side surface of the third lens is controlled, so that when the requirements on the structure of the lens barrel for accommodating the optical imaging system are strict, enough dispensing space can be provided even if the structure is an ultrathin structure, and the production stability and yield are ensured.

|R21|/|f2|＜134.0；

wherein R21 denotes a radius of curvature of an object side surface of the second lens at the optical axis, and f2 denotes a focal length of the second lens.

Through the limitation of the relational expression, the second lens can also provide different refractive power distribution under the condition that the diaphragm is positioned at different positions, the balance of the optical imaging system on aberration is facilitated, and through reasonable curvature radius arrangement and the matching of aspheric surface type adjustment, the light rays are enabled not to generate larger angle deflection when entering the second lens and exiting the second lens, the reflection probability of the light rays of each field is reduced, the light ray passing rate is increased, and the relative illumination of the marginal field is facilitated to be improved; in addition, the formula is satisfied, so that the surface shape and the thickness of the second lens are reasonable in design, the technological requirements of the existing mold precision machining technology are met, and good molding conditions are provided.

|SLP31|/ET1＜193.0；

SLP31 represents the included angle formed between the tangent line of the object side surface of the third lens at the maximum effective diameter and the axis perpendicular to the optical axis, and ET1 represents the distance from the maximum effective diameter of the object side surface of the first lens to the maximum effective diameter of the image side surface of the first lens in the optical axis direction.

Through the limitation of the relational expression, the angle of the object side surface of the third lens at the position of the maximum effective diameter can be effectively controlled, and the light leakage risk of the marginal field of view can be avoided, so that the imaging effect is prevented from being greatly influenced, meanwhile, the forming manufacturability of the third lens is improved, the processing difficulty of mold manufacturing and forming is reduced, and the influence of parasitic light ghost image during imaging caused by multiple reflection of light between the second lens and the third lens is avoided; the optical imaging system meets the above formula, can avoid the light leakage risk of the edge field of view, reduce the influence of parasitic light ghost images during imaging, and provide enough thickness for the front end wall thickness of the lens barrel for accommodating the optical imaging system under the condition that the object side surface of the first lens provides proper surface type bending, thereby reducing the lens pressure test risk; in the case where the first lens is of a meniscus type, the introduction of a small amount of primary aberration facilitates correction of aberration by the second lens and the third lens, which contributes to reduction of tolerance sensitivity of the first lens.

0.3＜f1/f12＜2.7；

wherein f1 denotes a focal length of the first lens, and f12 denotes a combined focal length of the first lens and the second lens.

Through the limitation of the relational expression, the refractive power of the first lens and the refractive power of the second lens are reasonably distributed, appropriate light ray deflection can be provided for different diaphragm configuration schemes, the phenomenon that the refractive power is too large to cause aberration concentration of an optical imaging system and tolerance sensitivity concentration of lens assembly is avoided, under the condition that the structures of the first lens and the second lens are reasonably distributed, good support can be provided for arrangement of the whole structure of the optical imaging system, gaps can be reasonably distributed, and accordingly a shading sheet can be used for improving the stray light condition.

0.6＜ET23/ET12＜11.0；

ET23 represents the distance between the maximum effective diameter of the image-side surface of the second lens and the maximum effective diameter of the object-side surface of the third lens in the optical axis direction, and ET12 represents the distance between the maximum effective diameter of the image-side surface of the first lens and the maximum effective diameter of the object-side surface of the second lens in the optical axis direction.

Through the limitation of the relational expression, the positions among the first lens, the second lens and the third lens are reasonably distributed, the optical imaging system has good edge gaps, the reasonable arrangement of the whole structure of the optical imaging system is facilitated, the forming risk of lens assembly is reduced beneficially, the medium thickness and the air gaps of the lenses are kept in a reasonable range, and the tolerance sensitivity of the lenses is reduced by matching with the reasonable distribution of the refractive power.

0.7＜BF/BF32＜0.95；

wherein BF represents a minimum distance between an image side surface of the third lens and the imaging surface in the optical axis direction, and BF32 represents a distance between a maximum effective diameter of the image side surface of the third lens and the imaging surface in the optical axis direction.

Through the limitation of the relational expression, a proper optical back focus distance can be provided for the optical imaging system, and various actual back focus requirements are met, so that the arrangement difficulty of the optical imaging system accommodated in the lens barrel is reduced, the dispensing space is increased, and the production stability is further improved; under the condition that the third lens is W-shaped as a whole, the light deflection angle is easier to reduce for guiding light by the surface shape change, the relative illumination of the marginal field of view is improved, the tolerance sensitivity of the third lens is reduced, and the aberration correction and the imaging performance improvement of the optical imaging system are facilitated by the surface shape change.

The embodiment of the utility model provides a pair of camera module, camera module includes:

a photosensitive element; and

the optical imaging system of any one of the above embodiments, wherein the photosensitive element is installed on an image side of the optical imaging system, and the photosensitive element is configured to convert an optical signal that passes through the optical imaging system and reaches the imaging surface into an electrical signal.

The above-mentioned module of making a video recording that has this optical imaging system is favorable to promoting image quality and to making a video recording module overall structure's frivolous design, and the visual field has high relative luminance, and can carry out accurate seizure and discernment to light and image position.

An embodiment of the present invention provides an electronic device, the electronic device includes:

a housing; and

the camera module of the above embodiment is mounted on the housing.

The above-mentioned electronic device who has this module of making a video recording is favorable to promoting image quality and to the frivolous design of module overall structure of making a video recording, and the visual field has high relative brightness, can carry out accurate seizure and discernment to light and image position.

The embodiment of the utility model provides a pair of car, the car includes:

a vehicle body; and

in the camera module according to the above embodiment, the camera module is disposed on the vehicle body to obtain the environmental information around the vehicle body.

The above-mentioned car that has this module of making a video recording is favorable to promoting image quality and to the frivolous design of module overall structure of making a video recording, and the visual field has high relative luminance, can carry out accurate seizure and discernment to light and image position.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

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

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

a in fig. 2 is a spherical aberration diagram (mm) of the optical imaging system according to the first embodiment of the present application;

b in fig. 2 is an astigmatism diagram (mm) of the optical imaging system according to the first embodiment of the present application;

c in fig. 2 is a distortion map (%) of the optical imaging system according to the first embodiment of the present application;

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

a in fig. 4 is a spherical aberration diagram (mm) of the optical imaging system of the second embodiment of the present application;

b in fig. 4 is an astigmatism diagram (mm) of the optical imaging system of the second embodiment of the present application;

c in fig. 4 is a distortion map (%) of the optical imaging system of the second embodiment of the present application;

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

a in fig. 6 is a spherical aberration diagram (mm) of an optical imaging system according to a third embodiment of the present application;

b in fig. 6 is an astigmatism diagram (mm) of the optical imaging system according to the third embodiment of the present application;

c in fig. 6 is a distortion map (%) of the optical imaging system of the third embodiment of the present application;

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

a in fig. 8 is a spherical aberration diagram (mm) of an optical imaging system according to a fourth embodiment of the present application;

b in fig. 8 is an astigmatism diagram (mm) of an optical imaging system according to a fourth embodiment of the present application;

c in fig. 8 is a distortion map (%) of the optical imaging system of the fourth embodiment of the present application;

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

a in fig. 10 is a spherical aberration chart (mm) of the optical imaging system of example five of the present application;

b in fig. 10 is an astigmatism diagram (mm) of the optical imaging system of example five of the present application;

c in fig. 10 is a distortion map (%) of the optical imaging system of example five of the present application;

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

a in fig. 12 is a spherical aberration diagram (mm) of an optical imaging system according to a sixth embodiment of the present application;

b in fig. 12 is an astigmatism diagram (mm) of an optical imaging system according to a sixth embodiment of the present application;

c in fig. 12 is a distortion map (%) of the optical imaging system according to the sixth embodiment of the present application;

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

a in fig. 14 is a spherical aberration diagram (mm) of the optical imaging system of embodiment seven of the present application;

b in fig. 14 is an astigmatism diagram (mm) of the optical imaging system of embodiment seven of the present application;

c in fig. 14 is a distortion map (%) of the optical imaging system according to embodiment seven of the present application;

fig. 15 is a schematic block diagram of a camera module according to an embodiment of the present disclosure;

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

fig. 17 is a block diagram of an electronic device according to an embodiment of the present application.

Description of the main elements of the drawings:

an optical imaging system 10, a diaphragm 11 and an infrared band-pass filter 13;

an electronic device 20;

automobile 100, camera module 110, automobile body 130.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any 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. Either mechanically or electrically. 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.

The disclosure of the present invention provides many different embodiments or examples for implementing different structures of the present 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.

Referring to fig. 1 to 14, in an optical imaging system 10 provided in the present embodiment, in order from an object side to an image side along an optical axis L, the optical imaging system 10 includes a first lens element L1 with positive refractive power, a second lens element L2 with refractive power, and a third lens element L3 with refractive power. The object-side surface of the first lens element L1 is convex at the paraxial region L. The image-side surface of the second lens L2 is convex near the circumference. The image-side surface of the third lens L3 is convex near the circumference. The object-side surface and the image-side surface of the third lens L3 are both aspherical. At least one of the object-side surface and the image-side surface of the third lens L3 is provided with at least one inflection point. The optical imaging system 10 satisfies the following relationship: the FOV/FNO is more than 55.0deg and less than 71.0 deg; where FOV represents an object field angle corresponding to the maximum imaging circle of the optical imaging system 10, and FNO represents an f-number of the optical imaging system 10.

Above-mentioned optical imaging system 10, through refractive power and face type rational configuration, be favorable to promoting optical imaging system 10's imaging quality, and be favorable to optical imaging system 10 overall structure's frivolous design, satisfy the injecing of above-mentioned formula after, can provide great angle of vision, thereby the distortion is rationally controlled, provide wider identification range for optical imaging system, thereby can carry out accurate seizure and discernment to light and image position, can dwindle the aperture value simultaneously, promote the aperture diameter, increase the light inlet quantity, and then can increase the relative illuminance of marginal visual field, thereby can further accurately catch and discern the position of light and image.

Specifically, when the optical imaging system 10 is a near-infrared optical system, in the case of providing a configuration in which the diaphragm 11 is located on the object-side surface of the first lens L1 or between the first lens L1 and the second lens L2, by the definition of the above-described relational expression, the FNO is small, the aperture is large, a sufficient amount of light entering can be provided for the optical imaging system 10, infrared recognition can be favorably performed in a low-illuminance environment, and reduction of the FNO is favorable for suppressing a situation in which the field of view at the edge of the wide-angle lens falls too fast relative to illuminance. Meanwhile, the formula is satisfied, the FOV of the field angle is large, distortion can be reasonably controlled, a wider identification range is provided for infrared identification, and the infrared identification device has better convenience.

More specifically, in some embodiments, the FOV/FNO may take on values of 55.76, 55.92, 63.27, 68.35, 63.80, 70.57, and any other value greater than 55.0 and less than 71.0 (in deg. or deg.). In some embodiments, the FNO ranges from (1.27,1.42) and the FOV ranges from (79 °,97 °).

In certain embodiments, the optical imaging system 10 satisfies the following relationship: 0.74 < TTL/(IMGH 2) < 0.91; where TTL denotes a distance on the optical axis L from the object side surface of the first lens L1 to the imaging surface, and IMGH denotes a radius of a maximum imaging circle on the imaging surface of the optical imaging system 10.

Thus, by limiting the above relation and matching with the reasonable configuration of the refractive power of each lens, the optical imaging system 10 can obtain good lightness and thinness, have good aberration balance and image quality improvement capability, and support a high-pixel electronic photosensitive chip.

Specifically, in some embodiments, TTL/(IMGH × 2) can take on a value of 0.75, 0.80, 0.81, 0.82, 0.83, 0.88, 0.90, and any other value greater than 0.74 and less than 0.91.

In addition, IMGH can determine the size of the electronic photosensitive chip, and the larger IMGH, the larger the maximum size of the electronic photosensitive chip can be supported. In the case of TTL/(IMGH × 2) > 0.91, although the optical imaging system 10 can obtain good aberration balance and image power, the distance from the object side surface of the first lens L1 to the image plane on the optical axis L is difficult to compress as the electronic photosensitive chip increases, so that the optical imaging system 10 is reduced in thinness. In the case of TTL/(IMGH × 2) < 0.74, the optical imaging system 10 can be made to have good lightness and thinness, but too small an overall size can greatly limit the balance of aberrations, matching of the electronic photosensitive chips, and optimization of resolution. Satisfying the above formula, TTL of the optical imaging system 10 is more easily compressed, and the total length of the optical imaging system 10 is shorter, so that the optical imaging system 10 can satisfy the light and thin design; satisfying the above formula, can let optical imaging system 10 support the electron sensitization chip of bigger size, and then make optical imaging system 10 have high pixel to can carry out accurate seizure and discernment to light and image position, improve optical imaging system 10's imaging quality.

In certain embodiments, the optical imaging system 10 satisfies the following relationship: RI/| f3| SD32 < 67.0; where RI denotes a relative illuminance at a radius of 2.3mm of an imaging circle on an imaging surface of the optical imaging system 10, f3 denotes a focal length of the third lens L3, and SD32 denotes a vertical distance to the optical axis L at the maximum effective diameter of the image-side surface of the third lens L3.

Therefore, through the limitation of the relational expression, the FNO is reasonably increased, the good refractive power distribution and the surface type combination are reasonably increased, the relative illumination of the optical imaging system 10 is greatly improved, the uniformity of the relative illumination of each part can be ensured in an effective imaging range, the improvement of the identification precision based on images is facilitated, and the strong light and night identification probability is improved.

Specifically, in some embodiments, RI/| f3| _ SD32 may take on values of 1.03, 4.87, 12.69, 34.38, 44.68, 66.35, 66.79, and any other value less than 67.0. In some embodiments, RI ranges from (37%, 51%).

In addition, the third lens element L3 can provide both positive and negative refractive power, so as to easily meet the requirement of matching the light incident angles of different electronic photosensitive chips. The third lens L3 is adjusted in surface shape to generate sufficient amount of primary astigmatism, distortion, and coma, so as to form a good balance with the aberrations generated by the first lens L1 and the second lens L2, thereby contributing to the overall aberration control of the optical imaging system 10 and improving the resolving power. Satisfying the above formula, and controlling the aperture of the image side surface of the third lens L3 at the same time can provide enough dispensing space even with an ultra-thin structure when the requirements on the structure of the lens barrel for accommodating the optical imaging system 10 are severe, thereby ensuring production stability and yield.

In certain embodiments, the optical imaging system 10 satisfies the following relationship: i R21I/I f 2I < 134.0; where R21 denotes a radius of curvature of the object-side surface of the second lens L2 at the optical axis L, and f2 denotes a focal length of the second lens L2.

Thus, by the limitation of the above relation, the second lens L2 can also provide different refractive power distributions when the diaphragm 11 is at different positions, which is helpful for balancing aberrations of the optical imaging system 10, and through reasonable curvature radius setting and matching with aspheric surface type adjustment, the light incident on the second lens L2 and the light emergent on the second lens L2 do not generate large angular deflection, thereby reducing the reflection probability of light in each field, increasing the light passing rate, and being beneficial to improving the relative illumination of marginal fields; in addition, the above formula is satisfied, the surface shape and the thickness of the second lens L2 are reasonable in design, the technological requirements of the existing mold precision machining technology are met, and good molding conditions are provided.

Specifically, in some embodiments, | R21|/| f2| can take on values of 0.43, 0.57, 1.11, 1.25, 7.44, 7.60, 133.46, and other arbitrary values less than 134.0.

In certain embodiments, the optical imaging system 10 satisfies the following relationship: i SLP 31I/ET 1< 193.0; wherein SLP31 denotes an angle formed between a tangent line of the object-side surface of the third lens L3 at the maximum effective diameter and an axis perpendicular to the optical axis L, and ET1 denotes a distance in the direction of the optical axis L from the maximum effective diameter of the object-side surface of the first lens L1 to the maximum effective diameter of the image-side surface of the first lens L1.

Relatedly, when SLP31>0, the optical imaging system 10 has a large risk of light leakage in the fringe field of view, and is liable to have a large influence on the imaging effect. When SLP31< -50 exists, the object side surface of the third lens L3 has certain forming risk, which brings certain difficulty to the mould manufacture and the forming process, and the light rays between the second lens L2 and the third lens L3 are easy to be reflected for multiple times, which causes the influence of the stray light ghost image.

Therefore, through the limitation of the relational expression, the angle of the object side surface of the third lens L3 at the maximum effective diameter can be effectively controlled, the light leakage risk of the marginal view field can be avoided, the imaging effect is prevented from being greatly influenced, meanwhile, the forming manufacturability of the third lens L3 is improved, the processing difficulty of mold manufacturing and forming is reduced, and the influence of parasitic light ghost image during imaging caused by multiple reflection of light between the second lens L2 and the third lens L3 is avoided. The above formula is satisfied, the risk of light leakage in the marginal field of view can be avoided, and when the influence of the parasitic light ghost image in imaging is reduced, and under the condition that the object side surface of the first lens L1 provides proper surface-shaped curvature, enough thickness can be provided for the front end wall thickness of the lens barrel accommodating the optical imaging system 10, so that the risk of lens pressure test is reduced; in the case where the first lens L1 is of a meniscus type, the introduction of a small amount of primary aberration facilitates correction of aberrations by the second lens L2 and the third lens L3, which contributes to a reduction in tolerance sensitivity of the first lens L1.

Specifically, in some embodiments, | SLP31|/ET1 may take on values of 0.06, 0.24, 7.63, 9.31, 46.21, 105.12, 192.85, and any other value less than 193.0.

In certain embodiments, the optical imaging system 10 satisfies the following relationship: f1/f12 is more than 0.3 and less than 2.7; where f1 denotes a focal length of the first lens L1, and f12 denotes a combined focal length of the first lens L1 and the second lens L2.

Therefore, through the limitation of the above relation, the refractive powers of the first lens element L1 and the second lens element L2 are reasonably distributed, so as to provide suitable light deflection for different configurations of the diaphragm 11, avoid aberration concentration of the optical imaging system 10 and tolerance sensitivity concentration of lens assembly caused by excessive refractive power, and provide good support for arrangement of the whole structure of the optical imaging system 10 under the condition that the structures of the first lens element L1 and the second lens element L2 are reasonably distributed, thereby contributing to reasonably distributing gaps, and further using the light shielding sheet to improve the stray light condition.

Specifically, in some embodiments, f1/f12 can take on values of 0.37, 1.18, 1.67, 2.35, 2.39, 2.65, and any other value greater than 0.3 and less than 2.7.

In certain embodiments, the optical imaging system 10 satisfies the following relationship: 0.6 < ET23/ET12 < 11.0; ET23 denotes a distance in the direction of the optical axis L from the maximum effective diameter of the image-side surface of the second lens L2 to the maximum effective diameter of the object-side surface of the third lens L3, and ET12 denotes a distance in the direction of the optical axis L from the maximum effective diameter of the image-side surface of the first lens L1 to the maximum effective diameter of the object-side surface of the second lens L2.

Therefore, through the limitation of the above relation, the positions of the first lens element L1, the second lens element L2 and the third lens element L3 are reasonably distributed, and the optical imaging system 10 has a good edge gap, which is beneficial to the reasonable arrangement of the overall structure of the optical imaging system, and is beneficial to reducing the forming risk of lens assembly, and the medium thickness and the air gap of each lens element are kept in a reasonable range, and the tolerance sensitivity of each lens element can be reduced in cooperation with the reasonable distribution of refractive power.

Specifically, in some embodiments, ET23/ET12 can take on values of 0.65, 2.07, 2.11, 2.40, 4.03, 7.10, 10.92, and any other value greater than 0.6 and less than 11.0.

In certain embodiments, the optical imaging system 10 satisfies the following relationship: BF/BF32 is more than 0.7 and less than 0.95; where BF denotes a minimum distance in the direction of the optical axis L between the image side surface of the third lens L3 and the image plane, and BF32 denotes a distance in the direction of the optical axis L between the maximum effective diameter of the image side surface of the third lens L3 and the image plane.

Therefore, through the limitation of the relational expression, a proper optical back focus distance can be provided for the optical imaging system 10, and various actual back focus requirements are met, so that the arrangement difficulty of the optical imaging system 10 accommodated in the lens barrel is reduced, the dispensing space is improved, and the production stability is further improved; when the third lens L3 has a W-shaped surface, the light deflection angle is easier to be reduced for guiding light by the surface shape change, the relative illumination of the fringe field is improved, the tolerance sensitivity of the third lens L3 is reduced, and the surface shape change contributes to the aberration correction and the imaging performance improvement of the optical imaging system 10.

In addition, in the embodiment of the present invention, the image plane refers to an image plane formed on the image side of the optical imaging system 10 by the incident light.

Specifically, in some embodiments, BF/BF32 may take on values of 0.72, 0.73, 0.74, 0.93, and any other value greater than 0.7 and less than 0.95.

In addition, in the embodiments of the present application, the surface shape of the aspherical surface is determined by the following formula:

where h is the height from any point on the aspheric surface to the optical axis L, c is the vertex curvature, k is the conic constant, and Ai is the correction coefficient of the ith order of the aspheric surface.

The present application will now be described in detail with reference to the following detailed description of illustrative embodiments thereof and the accompanying drawings. In addition, it is understood that in other embodiments, the material of the lens may be at least one of plastic, glass, resin, silicone, polymethyl methacrylate (acryl), and polycarbonate. In one embodiment, the material of the first lens L1, the second lens L2, and the third lens L3 is glass.

The first embodiment is as follows:

referring to fig. 1 and fig. 2, the optical imaging system 10 of the present embodiment includes, from the object side to the image side, a stop 11, a first lens L1, a second lens L2, a third lens L3, and an infrared band pass filter 13.

The first lens element L1 with positive refractive power has a convex object-side surface S11 at a paraxial region L and a convex surface at a peripheral region. The image side surface S12 is concave at the paraxial region L and concave near the circumference. S11 and S12 are both aspheric.

The second lens element L2 with negative refractive power has a concave object-side surface S21 at a paraxial region L and a concave object-side surface at a peripheral region. The image side surface S22 is concave at the paraxial region L and convex at the peripheral region. S21 and S22 are both aspheric.

The third lens element L3 with positive refractive power has a convex object-side surface S31 at a paraxial region L and a concave object-side surface at a peripheral region. The image side surface S32 is concave at the paraxial region L and convex at the peripheral region. S31 and S32 are both aspheric.

In the first embodiment, the distance TTL of the object-side surface S11 of the first lens L1 from the image plane on the optical axis L is 3.98mm, the radius IMGH of the maximum image circle on the image plane of the optical imaging system 10 is 2.42mm, the field angle FOV of the optical imaging system 10 is 79.40 °, the f-number FNO of the optical imaging system 10 is 1.42, the focal length f1 of the first lens L1 is 4.04mm, the focal length f2 of the second lens L2 is 4.13mm, the focal length f3 of the third lens L3 is 2.52mm, and the radius of curvature R21 of the object-side surface S21 of the second lens L2 on the optical axis L is 4.58 mm.

The optical imaging system 10 also satisfies the conditions of the following table:

TABLE 1

TABLE 2

Fig. 2 a, fig. 2B, and fig. 2C are a spherical aberration graph, an astigmatism graph, and a distortion graph, respectively, in the first embodiment.

The abscissa of the spherical aberration graph represents the focus offset, and the ordinate represents the normalized field of view, and when the wavelengths given in a of fig. 2 are 950.0000nm, 940.0000nm, and 930.0000nm, respectively, the focus offsets of different fields of view are all within ± 0.05mm, which indicates that the optical imaging system 10 in this embodiment has less astigmatism and better imaging quality.

The abscissa of the astigmatism graph represents the focus offset, and the ordinate represents the image height, and the astigmatism curve given in B of fig. 2 represents that the focus offsets of the sagittal image plane and the meridional image plane are both within ± 0.10mm when the wavelength is 940.0000nm, which indicates that the optical imaging system 10 in this embodiment has less astigmatism and better imaging quality.

The abscissa of the distortion curve graph represents the distortion rate, and the ordinate represents the image height, and the distortion curve given in C of fig. 2 represents that the distortion is within ± 2.5% when the wavelength is 940.0000nm, which indicates that the distortion of the optical imaging system 10 in this embodiment is better corrected and the imaging quality is better.

As can be seen from fig. 2, the optical imaging system 10 according to the first embodiment can achieve good imaging effect.

Example two:

referring to fig. 3 and 4, the optical imaging system 10 of the present embodiment includes, from the object side to the image side, a stop 11, a first lens L1, a second lens L2, a third lens L3, and an infrared band pass filter 13.

The second lens element L2 with positive refractive power has a convex object-side surface S21 at a paraxial region L and a concave object-side surface at a peripheral region. The image side surface S22 is convex at the paraxial region L and convex near the circumference. S21 and S22 are both aspheric.

The third lens element L3 with negative refractive power has a concave object-side surface S31 at a paraxial region L and a convex object-side surface near the circumference. The image side surface S32 is concave at the paraxial region L and convex at the peripheral region. S31 and S32 are both aspheric.

In the second embodiment, the distance TTL of the object-side surface S11 of the first lens L1 from the imaging plane on the optical axis L is 4.00mm, the radius IMGH of the maximum imaging circle on the imaging plane of the optical imaging system 10 is 2.40mm, the field angle FOV of the optical imaging system 10 is 79.18 °, the f-number FNO of the optical imaging system 10 is 1.42, the focal length f1 of the first lens L1 is 4.38mm, the focal length f2 of the second lens L2 is 1.69mm, the focal length f3 of the third lens L3 is-2.02 mm, and the radius of curvature R21 of the object-side surface S21 of the second lens L2 on the optical axis L is 225.19 mm.

TABLE 3

TABLE 4

Fig. 4 a, 4B, and 4C are a spherical aberration graph, an astigmatism graph, and a distortion graph, respectively, in the second embodiment.

The abscissa of the spherical aberration graph represents the focus offset, and the ordinate represents the normalized field of view, and when the wavelengths given in a of fig. 4 are 950.0000nm, 940.0000nm, and 930.0000nm, respectively, the focus offsets of different fields of view are all within ± 0.05mm, which indicates that the optical imaging system 10 in this embodiment has less astigmatism and better imaging quality.

The abscissa of the astigmatism graph represents the focus offset, and the ordinate represents the image height, and the astigmatism curve given in B of fig. 4 represents that the focus offsets of the sagittal image plane and the meridional image plane are both within ± 0.20mm when the wavelength is 940.0000nm, which indicates that the optical imaging system 10 in this embodiment has less astigmatism and better imaging quality.

The abscissa of the distortion curve graph represents the distortion rate, the ordinate represents the image height, and the distortion curve given in C of fig. 4 represents that the distortion is within ± 8% when the wavelength is 940.0000nm, which shows that the distortion of the optical imaging system 10 in the present embodiment has certain correction effect and imaging quality.

As can be seen from fig. 4, the optical imaging system 10 according to the second embodiment can achieve good imaging effect.

Example three:

referring to fig. 5 and fig. 6, the optical imaging system 10 of the present embodiment includes, from the object side to the image side, a first lens L1, a stop 11, a second lens L2, a third lens L3, and an infrared band pass filter 13.

The second lens element L2 with positive refractive power has a concave object-side surface S21 at a paraxial region L and a concave object-side surface at a peripheral region. The image side surface S22 is convex at the paraxial region L and convex near the circumference. S21 and S22 are both aspheric.

In the third embodiment, the distance TTL of the object-side surface S11 of the first lens L1 from the imaging plane on the optical axis L is 4.30mm, the radius IMGH of the maximum imaging circle on the imaging plane of the optical imaging system 10 is 2.39mm, the field angle FOV of the optical imaging system 10 is 79.40 °, the f-number FNO of the optical imaging system 10 is 1.42, the focal length f1 of the first lens L1 is 3.90mm, the focal length f2 of the second lens L2 is 8.60mm, the focal length f3 of the third lens L3 is 66.19mm, and the radius of curvature R21 of the object-side surface S21 of the second lens L2 on the optical axis L is-4.93 mm.

TABLE 5

TABLE 6

Fig. 6 a, 6B and 6C are a spherical aberration graph, an astigmatism graph and a distortion graph of the third embodiment, respectively.

The abscissa of the spherical aberration graph represents the focus offset, and the ordinate represents the normalized field of view, and when the wavelengths given in a of fig. 6 are 950.0000nm, 940.0000nm, and 930.0000nm, respectively, the focus offsets of different fields of view are all within ± 0.10mm, which indicates that the optical imaging system 10 in this embodiment has less astigmatism and better imaging quality.

The abscissa of the astigmatism graph represents the focus offset, and the ordinate represents the image height, and the astigmatism curve given in B of fig. 6 represents that the focus offsets of the sagittal image plane and the meridional image plane are both within ± 0.10mm when the wavelength is 940.0000nm, which indicates that the optical imaging system 10 in this embodiment has less astigmatism and better imaging quality.

The abscissa of the distortion curve graph represents the distortion rate, and the ordinate represents the image height, and the distortion curve given in C of fig. 6 represents that the distortion is within ± 5.0% when the wavelength is 940.0000nm, which indicates that the distortion of the optical imaging system 10 in this embodiment is better corrected and the imaging quality is better.

As can be seen from fig. 6, the optical imaging system 10 according to the third embodiment can achieve good imaging effect.

Example four:

referring to fig. 7 and fig. 8, the optical imaging system 10 of the present embodiment includes, from the object side to the image side, a stop 11, a first lens L1, a second lens L2, a third lens L3, and an infrared band pass filter 13.

The second lens element L2 with positive refractive power has a concave object-side surface S21 at a paraxial region L and a concave object-side surface at a peripheral region. The image side surface S22 is concave at the paraxial region L and convex at the peripheral region. S21 and S22 are both aspheric.

The third lens element L3 with negative refractive power has a concave object-side surface S31 at a paraxial region L and a concave object-side surface at a peripheral region. The image side surface S32 is concave at the paraxial region L and convex at the peripheral region. S31 and S32 are both aspheric.

In the fourth embodiment, the distance TTL of the object-side surface S11 of the first lens L1 from the imaging plane on the optical axis L is 3.90mm, the radius IMGH of the maximum imaging circle on the imaging plane of the optical imaging system 10 is 2.40mm, the field angle FOV of the optical imaging system 10 is 83.52 °, the f-number FNO of the optical imaging system 10 is 1.32, the focal length f1 of the first lens L1 is 3.83mm, the focal length f2 of the second lens L2 is 1.25mm, the focal length f3 of the third lens L3 is-1.47 mm, and the radius of curvature R21 of the object-side surface S21 of the second lens L2 on the optical axis L is-9.52 mm.

TABLE 7

TABLE 8

Fig. 8 a, fig. 8B, and fig. 8C are a spherical aberration graph, an astigmatism graph, and a distortion graph, respectively, in the fourth embodiment.

The abscissa of the spherical aberration graph represents the focus offset, and the ordinate represents the normalized field of view, and when the wavelengths given in a of fig. 8 are 950.0000nm, 940.0000nm, and 930.0000nm, respectively, the focus offsets of different fields of view are all within ± 0.05mm, which indicates that the optical imaging system 10 in this embodiment has less astigmatism and better imaging quality.

The abscissa of the astigmatism graph represents the focus offset, and the ordinate represents the image height, and the astigmatism curve given in B of fig. 8 represents that the focus offsets of the sagittal image plane and the meridional image plane are both within ± 0.20mm when the wavelength is 940.0000nm, which indicates that the optical imaging system 10 in this embodiment has less astigmatism and better imaging quality.

The abscissa of the distortion curve graph represents the distortion rate, and the ordinate represents the image height, and the distortion curve given in C of fig. 8 represents that the distortion is within ± 5.0% when the wavelength is 940.0000nm, which indicates that the distortion of the optical imaging system 10 in this embodiment is better corrected and the imaging quality is better.

As can be seen from fig. 8, the optical imaging system 10 according to the fourth embodiment can achieve good imaging effect.

Example five:

referring to fig. 9 and 10, the optical imaging system 10 of the present embodiment includes, from the object side to the image side, a stop 11, a first lens L1, a second lens L2, a third lens L3, and an infrared band pass filter 13.

The third lens element L3 with negative refractive power has a convex object-side surface S31 at a paraxial region L and a concave object-side surface at a peripheral region. The image side surface S32 is concave at the paraxial region L and convex at the peripheral region. S31 and S32 are both aspheric.

In example five, the distance TTL of the object-side surface S11 of the first lens L1 from the imaging plane on the optical axis L is 3.82mm, the radius IMGH of the maximum imaging circle on the imaging plane of the optical imaging system 10 is 2.40mm, the field angle FOV of the optical imaging system 10 is 89.62 °, the f-number FNO of the optical imaging system 10 is 1.27, the focal length f1 of the first lens L1 is 4.05mm, the focal length f2 of the second lens L2 is 1.28mm, the focal length f3 of the third lens L3 is-1.68 mm, and the radius of curvature R21 of the object-side surface S21 of the second lens L2 on the optical axis L is-9.51 mm.

TABLE 9

Watch 10

Fig. 10 a, 10B and 10C are a spherical aberration graph, an astigmatism graph and a distortion graph of example fifthly, respectively.

The abscissa of the spherical aberration graph represents the focus offset, and the ordinate represents the normalized field of view, and when the wavelengths given in a of fig. 10 are 950.0000nm, 940.0000nm, and 930.0000nm, respectively, the focus offsets of different fields of view are all within ± 0.05mm, which illustrates that the optical imaging system 10 in this embodiment has a certain effect of improving spherical aberration and imaging quality.

The abscissa of the astigmatism graph represents the focus offset, the ordinate represents the image height, and the astigmatism curve given in B of fig. 10 represents that the focus offsets of the sagittal image plane and the meridional image plane are within ± 0.10mm when the wavelength is 940.0000nm, which indicates that the optical imaging system 10 in this embodiment has the effects of small astigmatism and good imaging quality within a certain image height range.

The abscissa of the distortion curve graph represents the distortion rate, the ordinate represents the image height, and the distortion curve given in C of fig. 10 represents that the distortion is within ± 5.0% when the wavelength is 940.0000nm, which indicates that the distortion of the optical imaging system 10 in this embodiment has a certain correction effect and better imaging quality.

As can be seen from fig. 10, the optical imaging system 10 according to the fifth embodiment can achieve a good imaging effect.

Example six:

referring to fig. 11 and 12, the optical imaging system 10 of the present embodiment includes, from the object side to the image side, a first lens L1, a stop 11, a second lens L2, a third lens L3, and an infrared band pass filter 13.

The first lens element L1 with positive refractive power has a convex object-side surface S11 at a paraxial region L and a convex surface at a peripheral region. The image side surface S12 is convex at the paraxial region L and convex near the circumference. S11 and S12 are both aspheric.

In the sixth embodiment, the distance TTL of the object-side surface S11 of the first lens L1 from the imaging plane on the optical axis L is 4.20mm, the radius IMGH of the maximum imaging circle on the imaging plane of the optical imaging system 10 is 2.39mm, the field angle FOV of the optical imaging system 10 is 90.59 °, the f-number FNO of the optical imaging system 10 is 1.42, the focal length f1 of the first lens L1 is 3.79mm, the focal length f2 of the second lens L2 is 9.50mm, the focal length f3 of the third lens L3 is 13.99mm, and the radius of curvature R21 of the object-side surface S21 of the second lens L2 on the optical axis L is 4.09 mm.

TABLE 11

TABLE 12

Fig. 12 a, 12B, and 12C are a spherical aberration graph, an astigmatism graph, and a distortion graph, respectively, in example six.

The abscissa of the spherical aberration graph represents the focus offset, and the ordinate represents the normalized field of view, and when the wavelengths given in a of fig. 12 are 950.0000nm, 940.0000nm, and 930.0000nm, respectively, the focus offsets of different fields of view are all within ± 0.10mm, which indicates that the optical imaging system 10 in this embodiment has less astigmatism and better imaging quality.

The abscissa of the astigmatism graph represents the focus offset, and the ordinate represents the image height, and the astigmatism curve given in B of fig. 12 represents that the focus offsets of the sagittal image plane and the meridional image plane are within ± 0.20mm as a whole when the wavelength is 940.0000nm, which indicates that the optical imaging system 10 in this embodiment has the effects of small astigmatism and good imaging quality within a certain image height range.

The abscissa of the distortion curve graph represents the distortion rate, and the ordinate represents the image height, and the distortion curve given in C of fig. 12 represents that the distortion is within ± 5.0% when the wavelength is 940.0000nm as a whole, which indicates that the distortion of the optical imaging system 10 in this embodiment can be better corrected and better imaging quality can be obtained within a certain range of the image height.

As can be seen from fig. 12, the optical imaging system 10 according to the sixth embodiment can achieve good imaging effect.

Example seven:

referring to fig. 13 and 14, the optical imaging system 10 of the present embodiment includes, from the object side to the image side, a first lens L1, a stop 11, a second lens L2, a third lens L3, and an infrared band pass filter 13.

The second lens element L2 with positive refractive power has a convex object-side surface S21 at a paraxial region L and a convex surface at a peripheral region. The image side surface S22 is convex at the paraxial region L and convex near the circumference. S21 and S22 are both aspheric.

In example seven, the distance TTL of the object-side surface S11 of the first lens L1 from the imaging plane on the optical axis L is 3.58mm, the radius IMGH of the maximum imaging circle on the imaging plane of the optical imaging system 10 is 2.39mm, the field angle FOV of the optical imaging system 10 is 97.05 °, the f-number FNO of the optical imaging system 10 is 1.42, the focal length f1 of the first lens L1 is 4.91mm, the focal length f2 of the second lens L2 is 5.33mm, the focal length f3 of the third lens L3 is 5.98mm, and the radius of curvature R21 of the object-side surface S21 of the second lens L2 on the optical axis L is 6.68 mm.

watch 13

TABLE 14

A of FIG. 14, B of FIG. 14, C of FIG. 14 are the spherical aberration curve, astigmatism curve and distortion curve, respectively, in the seventh embodiment.

The abscissa of the spherical aberration graph represents the focus offset, and the ordinate represents the normalized field of view, and when the wavelengths given in a of fig. 14 are 950.0000nm, 940.0000nm, and 930.0000nm, respectively, the focus offsets of different fields of view are all within ± 0.05mm, which indicates that the optical imaging system 10 in this embodiment has less astigmatism and better imaging quality.

The abscissa of the astigmatism graph represents the focus offset, and the ordinate represents the image height, and the astigmatism curve given in B of fig. 14 represents that the focus offsets of the sagittal image plane and the meridional image plane are both within ± 0.20mm when the wavelength is 940.0000nm, which indicates that the optical imaging system 10 in this embodiment has less astigmatism and better imaging quality.

The abscissa of the distortion curve graph represents the distortion rate, and the ordinate represents the image height, and the distortion curve given in C of fig. 14 represents that the distortion is within ± 5.0% when the wavelength is 940.0000nm as a whole, which indicates that the distortion of the optical imaging system 10 in this embodiment can be better corrected and better imaging quality can be obtained within a certain range of the image height.

As can be seen from fig. 14, the optical imaging system 10 according to the seventh embodiment can achieve good imaging effect.

In addition, the optical imaging system 10 in embodiments one to seven also satisfies the conditions of the following table:

watch 15

Referring to fig. 15, an image capturing module 110 according to an embodiment of the present disclosure includes a photosensitive element 111 and the optical imaging system 10 according to any of the above embodiments. The photosensitive element 111 is mounted on the image side of the optical imaging system 10. The photosensitive element 111 is used to convert an optical signal that passes through the optical imaging system 10 and reaches the imaging surface into an electrical signal.

The camera module 110 with the optical imaging system 10 is beneficial to improving the image quality and the light and thin design of the overall structure of the camera module 110, has high relative brightness in the apparent length, and can accurately capture and identify light and image positions.

It can be understood that the optical signal changes the optical path transmission direction after passing through the optical imaging system 10, so that a picture with high image quality can be formed on the imaging surface of the optical imaging system 10. The photosensitive element can process the optical signal of the imaging surface into a corresponding electric signal, and the electric signal can be transmitted to the electronic display screen, so that the picture of the optical signal on the imaging surface can be displayed through the electronic display screen. In one embodiment, the light sensing element includes a photosensor for converting a light signal to an analog signal and an analog-to-digital converter for converting the analog signal output by the photosensor to a digital signal.

Referring to fig. 16, in an electronic device 20 provided in the present embodiment, the electronic device 20 includes a housing 21 and the camera module 110 of any one of the embodiments, and the camera module 110 is mounted on the housing 21.

The electronic device 20 with the camera module 110 is beneficial to improving the image quality and the light and thin design of the overall structure of the camera module 110, has high relative brightness in the apparent length, and can accurately capture and identify light and image positions.

The electronic device 20 according to the embodiment of the present invention includes, but is not limited to, an information terminal device such as a camera, a car recorder, a smart phone, a Personal Digital Assistant (PDA), a tablet computer, a Personal Computer (PC), and a smart wearable device, or an electronic device having a photographing function.

Specifically, in the embodiment shown in fig. 16, the electronic device 20 is a mobile phone, and the camera module 110 is a front camera of the electronic device 20. It is understood that in other embodiments, the camera module 110 may be disposed at any position of the electronic device 20 to achieve the effect of the camera module 110 for shooting in the foregoing embodiments.

Referring to fig. 17, an automobile 100 according to an embodiment of the present disclosure includes an automobile body 130 and the camera module 110 according to the above embodiment, where the camera module 110 is disposed on the automobile body 130 to obtain environmental information around the automobile body 130.

Above-mentioned car 100 with module 110 of making a video recording is favorable to promoting image quality and to the frivolous design of module 110 overall structure of making a video recording, looks long having high relative luminance, can carry out accurate seizure and discernment to light and image position.

Specifically, in the embodiment shown in fig. 17, the camera module 110 may be a front camera of the automobile 100, may be a camera in an ADAS (Advanced Driver assistance System) of the automobile 100, may be a drive recorder of the automobile 100, and may also be a monitoring security camera of the automobile 100. The number of the camera modules 110 may be one, two, or more than two. The environmental information around the vehicle body 130 includes, but is not limited to, road surface and road marking information of a lane, parking space information of a parking lot, obstacle information around the vehicle body 130, and the like.

In addition, the camera module 110 is also used in medical instruments and infrared imaging devices. Referring to fig. 15, in one embodiment, the optical signal is an infrared optical signal.

In the description of the present specification, reference to the terms "one embodiment", "some embodiments", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

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

the optical imaging system further satisfies the following relation:

55.0deg＜FOV/FNO＜71.0deg；

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

0.74＜TTL/(IMGH*2)＜0.91；

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

RI/|f3|*SD32＜67.0；

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

|R21|/|f2|＜134.0；

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

|SLP31|/ET1＜193.0；

SLP31 represents an included angle formed between a tangent line of the object-side surface of the third lens at the maximum effective diameter and an axis perpendicular to the optical axis, and ET1 represents a distance from the maximum effective diameter of the object-side surface of the first lens to the maximum effective diameter of the image-side surface of the first lens in the optical axis direction.

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

0.3＜f1/f12＜2.7；

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

0.6＜ET23/ET12＜11.0；

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

0.7＜BF/BF32＜0.95；

9. The utility model provides a module of making a video recording, its characterized in that, the module of making a video recording includes:

a photosensitive element; and

the optical imaging system of any one of claims 1 to 8, the photosensitive element mounted image-side of the optical imaging system, the photosensitive element for converting optical signals passing through the optical imaging system and reaching the imaging plane into electrical signals.

10. An electronic device, comprising:

a housing; and

the camera module of claim 9, mounted to the housing.

11. An automobile, comprising:

a vehicle body; and

the camera module of claim 9, wherein the camera module is disposed on the vehicle body to obtain environmental information about the vehicle body.