CN216210174U

CN216210174U - Optical imaging lens

Info

Publication number: CN216210174U
Application number: CN202122193498.6U
Authority: CN
Inventors: 徐胡伟; 张晓彬; 闻人建科; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2022-04-05
Anticipated expiration: 2031-09-10

Abstract

The utility model provides an optical imaging lens. The imaging lens sequentially comprises the following components from the object side to the image side of the imaging lens: a first lens; a second lens; a third lens having a positive focal power; the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens meet the following requirements: f/EPD <1.2; 0.9< f/ImgH tan (Semi-FOV) <1.1 is satisfied between half ImgH of the diagonal length of the effective pixel region on the imaging plane, the effective focal length f of the optical imaging lens, and half Semi-FOV of the maximum field angle of the optical imaging lens. The utility model solves the problem of poor imaging quality of the TOF lens in the prior art.

Description

Optical imaging lens

Technical Field

The utility model relates to the technical field of optical imaging equipment, in particular to an optical imaging lens.

Background

With the development of mobile phone photographing technology, the requirements on mobile phone lenses are higher and higher. In recent years, many different types of lenses, such as wide-angle lenses, telephoto lenses, periscopic telephoto lenses, 3D lenses, portrait lenses, punch lenses, etc., have appeared on the market, greatly enriching the choices of people. The working principle of the TOF (time of flight) lens is to calculate the time difference between the infrared light emitted from the camera and reflected back to the camera, and collect data to form a group of distance depth data, so as to obtain an imaging technology of a three-dimensional 3D model, but the TOF lens has low illuminance, which results in poor imaging quality of the lens.

That is to say, the TOF lens in the prior art has a problem of poor imaging quality.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide an optical imaging lens to solve the problem of poor imaging quality of a TOF lens in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided an optical imaging lens comprising, in order from an object side of the optical imaging lens to an image side of the optical imaging lens: a first lens; a second lens; a third lens having a positive focal power; the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens meet the following requirements: f/EPD <1.2; 0.9< f/ImgH tan (Semi-FOV) <1.1 is satisfied between half ImgH of the diagonal length of the effective pixel region on the imaging plane, the effective focal length f of the optical imaging lens, and half Semi-FOV of the maximum field angle of the optical imaging lens.

Further, the object side surface of the first lens is concave.

Further, the object side surface of the third lens is convex.

Further, an on-axis distance TTL from the object-side surface of the first lens element to the imaging surface of the optical imaging lens system and an on-axis distance TD from the object-side surface of the first lens element to the image-side surface of the third lens element satisfy: 0.7< TD/TTL < 0.9.

Further, an on-axis distance TTL from the object-side surface of the first lens element to the imaging surface of the optical imaging lens and an on-axis distance SL from the diaphragm of the optical imaging lens to the imaging surface satisfy: 0.3< SL/TTL < 0.6.

Further, an on-axis distance TD from the object-side surface of the first lens element to the image-side surface of the third lens element, a half ImgH of a diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, and an aperture value fno of the optical imaging lens satisfy: 4< TD/ImgH fno < 6.

Further, the effective focal length f3 of the third lens, and the combined focal length f23 of the second lens and the third lens satisfy: 0.5< f3/f23< 1.5.

Further, the radius of curvature R5 of the object-side surface of the third lens, the radius of curvature R6 of the image-side surface of the third lens, and the effective focal length f3 of the third lens satisfy: 2< (R5-R6)/f3< 4.

Further, optical imaging camera lens still includes the filter, and the filter setting is between the imaging surface of third lens and optical imaging camera lens, and the wavelength more than or equal to 900nm and less than or equal to 1000nm of the light wave that the filter can pass through.

Further, a sum Σ AT of air intervals on the optical axis between any adjacent two lenses having optical powers of the first to third lenses and a sum Σ CT of center thicknesses on the optical axis of all the lenses satisfy: 0.3< ∑ AT/Σ CT < 1.3.

Further, the sum Σ CT of the center thicknesses of all the lenses on the optical axis, the distance BFL from the image-side surface of the third lens to the imaging surface of the optical imaging lens on the optical axis of the optical imaging lens, and the on-axis distance TD from the object-side surface of the first lens to the image-side surface of the third lens satisfy: 0.7< (BFL +. Sigma CT)/TD <1.

Further, a distance BFL from the image side surface of the third lens to the imaging surface of the optical imaging lens on the optical axis of the optical imaging lens, and an air interval T12 between the first lens and the second lens on the optical axis satisfy: 0.5< T12/BFL < 1.2.

Further, the sum Σ CT of the center thicknesses of all the lenses on the optical axis of the optical imaging lens and the sum Σ ET of the edge thicknesses of all the lenses satisfy: 1< ∑ CT/Σ ET <2.

Further, the sum Σ CT of the center thicknesses of all the lenses on the optical axis of the optical imaging lens, the center thickness CT2 of the second lens on the optical axis of the optical imaging lens, and the center thickness CT3 of the third lens on the optical axis satisfy: 0.7< (CT2+ CT 3)/. Sigma CT < 0.8.

Further, the abbe number V1 of the first lens, the abbe number V2 of the second lens and the abbe number V3 of the third lens satisfy: v1+ V2+ V3< 70.

Further, the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT31 of the object side surface of the third lens satisfy: 1.5< DT11/DT31 <3.

Further, the maximum effective radius DT22 of the image side surface of the second lens and the maximum effective radius DT32 of the image side surface of the third lens satisfy: 0.8< DT22/DT32< 1.5.

Further, the maximum effective radius DT11 of the object side surface of the first lens, the maximum effective radius DT21 of the object side surface of the second lens and the effective radius SR of the diaphragm of the optical imaging lens satisfy: 1< (DT11-DT21)/SR <2.

Further, an on-axis distance SAG21 between an intersection point of the object-side surface of the second lens and the optical axis of the optical imaging lens to an effective radius vertex of the object-side surface of the second lens and an on-axis distance SAG31 between an intersection point of the object-side surface of the third lens and the optical axis to an effective radius vertex of the object-side surface of the third lens satisfy: i SAG21-SAG31| < 0.1.

According to another aspect of the present invention, there is provided an optical imaging lens, comprising in order from an object side of the optical imaging lens to an image side of the optical imaging lens: a first lens; a second lens; a third lens having a positive focal power; the on-axis distance TD from the object side surface of the first lens to the image side surface of the third lens, the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens and the aperture value fno of the optical imaging lens satisfy the following conditions: 4< TD/ImgH × fno < 6; 0.9< f/ImgH tan (Semi-FOV) <1.1 is satisfied between half ImgH of the diagonal length of the effective pixel region on the imaging plane, the effective focal length f of the optical imaging lens, and half Semi-FOV of the maximum field angle of the optical imaging lens.

Further, the object side surface of the first lens is concave.

Further, the object side surface of the third lens is convex.

By applying the technical scheme of the utility model, the optical imaging lens sequentially comprises a first lens, a second lens and a third lens from the object side to the image side of the optical imaging lens; the third lens has positive focal power; the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens meet the following requirements: f/EPD <1.2; 0.9< f/ImgH tan (Semi-FOV) <1.1 is satisfied between half ImgH of the diagonal length of the effective pixel region on the imaging plane, the effective focal length f of the optical imaging lens, and half Semi-FOV of the maximum field angle of the optical imaging lens.

Through the reasonable distribution of the focal power of each lens, the aberration generated by the optical imaging lens is balanced, and the imaging quality of the optical imaging lens is greatly improved. By limiting the f/EPD within a reasonable range, the optical imaging lens can be ensured to obtain enough luminous flux under the characteristic of a large aperture, the image plane of the optical imaging lens is ensured to have higher illumination, and the optical imaging lens is ensured to have good imaging quality in a dark environment. By controlling f/ImgH tan (Semi-FOV) within a reasonable range, the effective focal length of the optical imaging lens is controlled within a reasonable range, the range of the maximum half field angle is ensured, and meanwhile, the optical imaging lens is ensured to have an image surface large enough to present more detailed information of the shot scene.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic structural view showing an optical imaging lens according to a first example of the present invention;

fig. 2 to 4 respectively show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of fig. 1;

fig. 5 is a schematic view showing a configuration of an optical imaging lens according to a second example of the present invention;

fig. 6 to 8 respectively show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens in fig. 5;

fig. 9 is a schematic structural view showing an optical imaging lens of example three of the present invention;

fig. 10 to 12 show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens in fig. 9, respectively;

fig. 13 is a schematic view showing a configuration of an optical imaging lens of example four of the present invention;

fig. 14 to 16 show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens in fig. 13, respectively;

fig. 17 is a schematic structural view showing an optical imaging lens of example five of the present invention;

fig. 18 to 20 respectively show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens in fig. 17;

fig. 21 is a schematic structural view showing an optical imaging lens of example six of the present invention;

fig. 22 to 24 show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens in fig. 21, respectively.

Wherein the figures include the following reference numerals:

STO, stop; e1, first lens; s1, the object side surface of the first lens; s2, an image side surface of the first lens; e2, second lens; s3, the object side surface of the second lens; s4, an image side surface of the second lens; e3, third lens; s5, the object side surface of the third lens; s6, an image side surface of the third lens; e4, a filter plate; s7, the object side surface of the filter plate; s8, the image side surface of the filter plate; and S9, imaging surface.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the utility model.

It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the object side becomes the object side surface of the lens, and the surface of each lens close to the image side is called the image side surface of the lens. The determination of the surface shape in the paraxial region can be performed by determining whether or not the surface shape is concave or convex, based on the R value (R denotes the radius of curvature of the paraxial region, and usually denotes the R value in a lens database (lens data) in optical software) in accordance with the determination method of a person ordinarily skilled in the art. For the object side surface, when the R value is positive, the object side surface is judged to be convex, and when the R value is negative, the object side surface is judged to be concave; in the case of the image side surface, the image side surface is determined to be concave when the R value is positive, and is determined to be convex when the R value is negative.

The utility model provides an optical imaging lens, aiming at solving the problem of poor imaging quality of a TOF lens in the prior art.

Example one

As shown in fig. 1 to 24, the optical imaging lens includes, in order from an object side to an image side thereof, a first lens, a second lens, and a third lens; the third lens has positive focal power; the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens meet the following requirements: f/EPD <1.2; 0.9< f/ImgH tan (Semi-FOV) <1.1 is satisfied between half ImgH of the diagonal length of the effective pixel region on the imaging plane, the effective focal length f of the optical imaging lens, and half Semi-FOV of the maximum field angle of the optical imaging lens.

The optical imaging lens is a ToF lens, has the characteristics of large aperture, small size and the like, has a measuring range of several meters, is not easily influenced by strong light, can be used as support hardware for face recognition, can be suitable for large-scale scene recognition, and is a 3D depth camera lens with a good shooting effect.

Preferably, the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: 0.9< f/EPD < 1.15; 0.93< f/ImgH tan (Semi-FOV) <1.05 is satisfied between half of the diagonal length ImgH of the effective pixel region on the imaging plane, the effective focal length f of the optical imaging lens, and half of the Semi-FOV of the maximum field angle of the optical imaging lens.

In this embodiment, the object-side surface of the first lens element is concave. The object side surface of the first lens is set to be a concave surface, so that the first lens can be matched with a corresponding field angle and has the function of diverging light rays.

In this embodiment, the object-side surface of the third lens element is convex. The third lens can be matched with the image height corresponding to the corresponding chip by the arrangement, and has a positive effect on improving the imaging quality of the optical imaging lens by converging light rays.

In this embodiment, an on-axis distance TTL from the object-side surface of the first lens element to the imaging surface of the optical imaging lens system and an on-axis distance TD from the object-side surface of the first lens element to the image-side surface of the third lens element satisfy: 0.7< TD/TTL < 0.9. By limiting the TD/TTL within a reasonable range, enough air space can be reserved between the image side surface of the third lens and the imaging surface, the distortion of the optical imaging lens can be better balanced, in addition, the forming debugging process space is larger, the problem that the appearance of the lens causes stray light risks is avoided, and the CRA (chip ray angle) can be better matched with a chip. Preferably, 0.71< TD/TTL < 0.85.

In this embodiment, an on-axis distance TTL from the object-side surface of the first lens element to the imaging surface of the optical imaging lens and an on-axis distance SL from the stop of the optical imaging lens to the imaging surface satisfy: 0.3< SL/TTL < 0.6. On the premise of ensuring total length TTL, the on-axis distance from the diaphragm to the imaging surface is reasonably controlled, in the optical imaging lens arranged in the diaphragm, the vignetting value of the optical imaging lens can be effectively controlled, and the part of light with poor imaging quality is intercepted, so that the resolution and the relative illumination of the whole optical imaging lens can be improved. Preferably, 0.35< SL/TTL < 0.58.

In this embodiment, an on-axis distance TD between the object-side surface of the first lens element and the image-side surface of the third lens element, a half ImgH of a diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, and an aperture value fno of the optical imaging lens satisfy: 4< TD/ImgH fno < 6. The TD/ImgH x fno is controlled within a reasonable range, so that the miniaturization of the optical imaging lens can be guaranteed, the imaging lens can be guaranteed to have a relatively large image surface range, the F number can be guaranteed to be within a small range, and the large aperture characteristic of the optical imaging lens is kept. Preferably, 4< TD/ImgH × fno < 5.5.

In the present embodiment, the effective focal length f3 of the third lens, and the combined focal length f23 of the second lens and the third lens satisfy: 0.5< f3/f23< 1.5. By limiting f3/f23 within a reasonable range, the distortion and astigmatism problems of the optical imaging lens can be better balanced on one hand, and a larger image plane can be obtained and higher imaging quality can be achieved on the other hand. Preferably 0.53< f3/f23< 1.4.

In the present embodiment, the radius of curvature R5 of the object-side surface of the third lens, the radius of curvature R6 of the image-side surface of the third lens, and the effective focal length f3 of the third lens satisfy: 2< (R5-R6)/f3< 4. By controlling (R5-R6)/f3 within a reasonable range, the focal power of the light ray imaging lens is reasonably distributed, so that the optical imaging lens has higher aberration correction capability and can obtain better manufacturability while keeping miniaturization. Preferably, 2.1< (R5-R6)/f3< 3.9.

In this embodiment, the optical imaging lens further includes a filter, the filter is disposed between the third lens and the imaging surface of the optical imaging lens, and the wavelength of the light wave that can pass through the filter is greater than or equal to 900nm and less than or equal to 1000 nm. The filter mainly functions to intercept visible light, and infrared light with the wavelength range of 900nm to 1000nm can be transmitted, so that the optical imaging lens can transmit the infrared light.

In the present embodiment, a sum Σ AT of air intervals on the optical axis between any adjacent two lenses having optical powers of the first to third lenses and a sum Σ CT of center thicknesses on the optical axis of all the lenses satisfy: 0.3< ∑ AT/Σ CT < 1.3. By controlling the sigma AT/sigma CT within a reasonable range, the processing and assembling characteristics can be ensured, and the problems of interference of front and rear lenses in the assembling process caused by over-small gaps are avoided; meanwhile, the optical imaging lens is beneficial to slowing down light deflection, can adjust the field curvature of the optical imaging lens, reduces the sensitivity and further obtains better imaging quality. Preferably, 0.35< ∑ AT/Σ CT < 1.23.

In the embodiment, the sum Σ CT of the center thicknesses of all the lenses on the optical axis, the distance BFL from the image-side surface of the third lens to the imaging surface of the optical imaging lens on the optical axis of the optical imaging lens, and the on-axis distance TD from the object-side surface of the first lens to the image-side surface of the third lens satisfy: 0.7< (BFL +. Sigma CT)/TD <1. By limiting (BFL + ∑ CT)/TD in a reasonable range, the miniaturization of the optical imaging lens is facilitated, meanwhile, the processing and the assembly of the optical imaging lens can be facilitated, and the problems that front and rear lenses interfere in the assembly process due to the small clearance are avoided. Preferably, 0.7< (BFL +. Sigma CT)/TD < 0.97.

In the present embodiment, a distance BFL from the image-side surface of the third lens to the imaging surface of the optical imaging lens on the optical axis of the optical imaging lens, and an air interval T12 between the first lens and the second lens on the optical axis satisfy: 0.5< T12/BFL < 1.2. By controlling the T12/BFL within a reasonable range, on one hand, a larger focusing range is provided in the module end debugging process, on the other hand, a target (a subject is placed in an upper glass cover plate and a lower glass cover plate) can be shot by the optical imaging lens in actual use, and the optical imaging lens can find the best focusing point by the aid of sufficiently long back focus. Preferably, 0.55< T12/BFL < 1.15.

In the present embodiment, the sum Σ CT of the center thicknesses of all lenses on the optical axis of the optical imaging lens and the sum Σ ET of the edge thicknesses of all lenses satisfy: 1< ∑ CT/Σ ET <2. By controlling the sigma CT/sigma ET within a reasonable range, enough air intervals can be ensured between the lenses and between the last lens and an imaging surface, the structural design and production line assembly process of the lens cone and the spacer are facilitated, and the distortion of the system can be better balanced. In addition, the forming debugging process has larger space, the stray light risk caused by appearance problems of the lens is avoided, and the CRA can be better matched with the chip. Preferably, 1.1< ∑ CT/Σ ET < 1.8.

In the present embodiment, the sum Σ CT of the center thicknesses of all the lenses on the optical axis of the optical imaging lens, the center thickness CT2 of the second lens on the optical axis of the optical imaging lens, and the center thickness CT3 of the third lens on the optical axis satisfy: 0.7< (CT2+ CT 3)/. Sigma CT < 0.8. By limiting (CT2+ CT 3)/[ sigma ] CT within a reasonable range, the thickness complementation of the first lens, the second lens and the third lens can be realized, a thick-thin-thick configuration is basically formed, good counteraction effects on positive and negative spherical aberration, positive and negative astigmatism, positive and negative distortion, chromatic aberration and the like are achieved, good complementation buffer effects on extreme environments such as high and low temperatures are achieved, and excellent temperature drift performance is achieved. Preferably, 0.71 ≦ (CT2+ CT 3)/. SIGMA CT ≦ 0.79.

In the present embodiment, the abbe number V1 of the first lens, the abbe number V2 of the second lens, and the abbe number V3 of the third lens satisfy: v1+ V2+ V3< 70. The abbe numbers of the three lenses are reasonably controlled, wherein the abbe numbers are inverse proportional indexes used for expressing the dispersion capability of the transparent substance, and the dispersion phenomenon is more serious when the numerical value is smaller. The larger the Abbe number of the material is, the closer the refractive indexes of different wavelengths are, the more the convergence of light rays with different wavelengths is facilitated, and the influence of position chromatic aberration and magnification chromatic aberration can be effectively weakened. Preferably 60< V1+ V2+ V3< 70.

In the present embodiment, the maximum effective radius DT11 of the object-side surface of the first lens and the maximum effective radius DT31 of the object-side surface of the third lens satisfy: 1.5< DT11/DT31 <3. By limiting DT11/DT31 within a reasonable range, on one hand, the vignetting value of the system can be effectively controlled, and the part of light with poor imaging quality is intercepted, so that the resolution and the relative illumination of the whole system can be improved; on the other hand, the problem of large section difference caused by overlarge caliber difference between the first lens and the third lens can be avoided, and the stability of assembly is ensured. The larger aperture of the first lens can ensure that the system absorbs sufficient luminous flux and keep the large aperture characteristic of the optical imaging lens. Preferably, 1.6< DT11/DT31< 2.95.

In the present embodiment, the maximum effective radius DT22 of the image-side surface of the second lens and the maximum effective radius DT32 of the image-side surface of the third lens satisfy: 0.8< DT22/DT32< 1.5. By limiting DT22/DT32 within a reasonable range, the lens aperture can be miniaturized, and the aperture difference between the second lens and the third lens is avoided from being too large, so that the size uniformity of the optical imaging lens is ensured. By limiting the aperture ratio, stray light can be effectively filtered, and the stray light performance of the optical imaging lens is improved. Preferably 0.82< DT22/DT32< 1.4.

In the present embodiment, the maximum effective radius DT11 of the object side surface of the first lens, the maximum effective radius DT21 of the object side surface of the second lens, and the effective radius SR of the stop of the optical imaging lens satisfy: 1< (DT11-DT21)/SR <2. By limiting (DT11-DT21)/SR within a reasonable range, the vignetting value of the optical imaging lens can be effectively controlled, marginal light rays with poor imaging quality are intercepted, and the resolution power and the relative illumination of an image plane are improved. Preferably, 1.02< (DT11-DT21)/SR < 1.9.

In this embodiment, an on-axis distance SAG21 between an intersection point of the object-side surface of the second lens and the optical axis of the optical imaging lens to an effective radius vertex of the object-side surface of the second lens and an on-axis distance SAG31 between an intersection point of the object-side surface of the third lens and the optical axis to an effective radius vertex of the object-side surface of the third lens satisfy: i SAG21-SAG31| < 0.1. By limiting the | SAG21-SAG31| within a reasonable range, the curvature difference of each lens can be avoided from being too large, and the uniformity and the continuity of the size of the optical imaging lens are ensured. By limiting the rise ratio, stray light can be effectively filtered, the stray light performance of the optical imaging lens is improved, and the practical processing assembly and the performance improvement are facilitated in engineering. Preferably, 0.002< | SAG21-SAG31| < 0.08.

Example two

As shown in fig. 1 to 24, the optical imaging lens includes, in order from an object side to an image side, a first lens and a second lens; a third lens; the third lens has positive focal power; the on-axis distance TD from the object side surface of the first lens to the image side surface of the third lens, the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens and the aperture value fno of the optical imaging lens satisfy the following conditions: 4< TD/ImgH × fno < 6; 0.9< f/ImgH tan (Semi-FOV) <1.1 is satisfied between half ImgH of the diagonal length of the effective pixel region on the imaging plane, the effective focal length f of the optical imaging lens, and half Semi-FOV of the maximum field angle of the optical imaging lens.

Through the reasonable distribution of the focal power of each lens, the aberration generated by the optical imaging lens is balanced, and the imaging quality of the optical imaging lens is greatly improved. The TD/ImgH x fno is controlled within a reasonable range, so that the miniaturization of the optical imaging lens can be guaranteed, the imaging lens can be guaranteed to have a relatively large image surface range, the F number can be guaranteed to be within a small range, and the large aperture characteristic of the optical imaging lens is kept. By controlling f/ImgH tan (Semi-FOV) within a reasonable range, the effective focal length of the optical imaging lens is controlled within a reasonable range, the range of the maximum half field angle is ensured, and meanwhile, the optical imaging lens is ensured to have an image surface large enough to present more detailed information of the shot scene.

Preferably, an on-axis distance TD from the object-side surface of the first lens to the image-side surface of the third lens, a half ImgH of a diagonal length of the effective pixel region on the imaging surface of the optical imaging lens, and an aperture value fno of the optical imaging lens satisfy: 4< TD/ImgH × fno < 5.5; 0.93< f/ImgH tan (Semi-FOV) <1.05 is satisfied between half of the diagonal length ImgH of the effective pixel region on the imaging plane, the effective focal length f of the optical imaging lens, and half of the Semi-FOV of the maximum field angle of the optical imaging lens.

The object side surface of the first lens is set to be a concave surface, so that the first lens can be matched with a corresponding field angle and has the function of diverging light rays.

Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on the imaging surface.

The optical imaging lens in the present application may employ a plurality of lenses, for example, the three lenses described above. By reasonably distributing the focal power, the surface shape, the central thickness of each lens, the axial distance between each lens and the like, the aperture of the optical imaging lens can be effectively increased, the sensitivity of the lens can be reduced, and the machinability of the lens can be improved, so that the optical imaging lens is more beneficial to production and processing and can be suitable for portable electronic equipment such as smart phones. The optical imaging lens also has large aperture and large field angle. The advantages of ultra-thin and good imaging quality can meet the miniaturization requirement of intelligent electronic products.

In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality.

However, it will be appreciated by those skilled in the art that the number of lenses constituting an optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although three lenses are exemplified in the embodiment, the optical imaging lens is not limited to including three lenses. The optical imaging lens may also include other numbers of lenses, as desired.

Examples of specific surface types and parameters applicable to the optical imaging lens of the above-described embodiment are further described below with reference to the drawings.

It should be noted that any one of the following examples one to six is applicable to all embodiments of the present application.

Example one

As shown in fig. 1 to 4, an optical imaging lens of the first example of the present application is described. Fig. 1 shows a schematic diagram of an optical imaging lens structure of example one.

As shown in fig. 1, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a filter E4, and an image plane S9.

The first lens element E1 has negative power, and the object-side surface S1 of the first lens element is concave, and the image-side surface S2 of the first lens element is concave. The second lens element E2 has positive refractive power, and the object-side surface S3 of the second lens element is convex, and the image-side surface S4 of the second lens element is concave. The third lens element E3 has positive refractive power, and the object-side surface S5 and the image-side surface S6 of the third lens element are convex. Filter E4 has an object side S7 and an image side S8 of the filter. The light from the object sequentially passes through the respective surfaces S1 to S8 and is finally imaged on the imaging surface S9.

In this example, the total effective focal length f of the optical imaging lens is 0.58mm, the maximum half field angle Semi-FOV of the optical imaging lens is 42.61 °, the total length TTL of the optical imaging lens is 3.25mm, and the image height ImgH is 0.55 mm.

Table 1 shows a basic structural parameter table of the optical imaging lens of example one, in which the units of the radius of curvature, the thickness/distance, the focal length, and the effective radius are all millimeters (mm).

TABLE 1

In example one, the object-side surface and the image-side surface of any one of the first lens element E1 through the third lens element E3 are aspheric, and the surface shape of each aspheric lens can be defined by, but is not limited to, the following aspheric formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below gives the high-order coefficient A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30, which can be used for each of the aspherical mirrors S1-S6 in example one.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

4.2148E-01

-5.1466E-01

4.7226E-01

-2.7689E-01

5.1211E-02

1.1499E-01

-2.0901E-01

S2

-8.5237E-02

8.3793E-01

-3.1182E+00

4.6399E+00

5.0680E-01

-1.4461E+01

2.3481E+01

S3

-3.4705E-01

1.5057E+00

-9.8560E+00

1.8040E+01

7.2017E+01

-5.0380E+02

1.1541E+03

S4

1.2042E-01

-1.2953E+00

8.4730E+00

-4.0871E+01

9.5264E+01

-1.0365E+02

4.3673E+01

S5

3.9437E-01

-1.7240E+00

1.0483E+01

-2.8418E+01

3.4975E+01

-2.0088E+01

4.4087E+00

S6

-8.8709E-01

9.8821E-01

4.0101E+01

-3.1581E+02

1.1281E+03

-1.9769E+03

1.3626E+03

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

2.2756E-01

-1.7608E-01

9.7113E-02

-3.7256E-02

9.4492E-03

-1.4249E-03

9.6793E-05

S2

-1.5974E+01

4.0826E+00

0.0000E+00

S3

-1.1861E+03

4.6324E+02

0.0000E+00

S4

0.0000E+00

S5

0.0000E+00

S6

0.0000E+00

TABLE 2

Fig. 2 shows an on-axis chromatic aberration curve of the optical imaging lens of example one, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 3 shows astigmatism curves of the optical imaging lens of example one, which represent meridional field curvature and sagittal field curvature. Fig. 4 shows distortion curves of the optical imaging lens of example one, which indicate distortion magnitude values corresponding to different angles of view.

As can be seen from fig. 2 to 4, the optical imaging lens according to the first example can achieve good imaging quality.

Example two

As shown in fig. 5 to 8, an optical imaging lens of example two of the present application is described. In this example and the following examples, descriptions of parts similar to example one will be omitted for the sake of brevity. Fig. 5 shows a schematic diagram of the optical imaging lens structure of example two.

As shown in fig. 5, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a filter E4, and an image plane S9.

In this example, the total effective focal length f of the optical imaging lens is 0.6mm, the maximum half field angle Semi-FOV of the optical imaging lens is 41.30 °, the total length TTL of the optical imaging lens is 3.45mm, and the image height ImgH is 0.55 mm.

Table 3 shows a basic structural parameter table of the optical imaging lens of example two, in which the units of the radius of curvature, the thickness/distance, the focal length, and the effective radius are all millimeters (mm).

TABLE 3

Table 4 shows the high-order term coefficients that can be used for each aspherical mirror surface in example two, wherein each aspherical mirror surface type can be defined by formula (1) given in example two above.

TABLE 4

Fig. 6 shows an on-axis chromatic aberration curve of the optical imaging lens of example two, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 7 shows astigmatism curves of the optical imaging lens of example two, which represent meridional field curvature and sagittal field curvature. Fig. 8 shows distortion curves of the optical imaging lens of example two, which indicate values of distortion magnitudes corresponding to different angles of view.

As can be seen from fig. 6 to 8, the optical imaging lens according to the second example can achieve good imaging quality.

Example III

As shown in fig. 9 to 12, an optical imaging lens of example three of the present application is described. Fig. 9 shows a schematic diagram of an optical imaging lens structure of example three.

As shown in fig. 9, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a filter E4, and an image plane S9.

In this example, the total effective focal length f of the optical imaging lens is 0.58mm, the maximum half field angle Semi-FOV of the optical imaging lens is 42.54 °, the total length TTL of the optical imaging lens is 3.18mm, and the image height ImgH is 0.55 mm.

Table 5 shows a basic structural parameter table of the optical imaging lens of example three, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 5

Table 6 shows the high-order term coefficients that can be used for each aspherical mirror surface in example three, wherein each aspherical mirror surface type can be defined by formula (1) given in example three above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

5.0783E-01

-5.1138E-01

3.7780E-01

-4.0410E-02

-5.0767E-01

1.2396E+00

-1.8830E+00

S2

-7.1869E-01

2.0952E+00

-1.2217E+00

-1.0630E+01

3.4916E+01

-4.8661E+01

3.0333E+01

S3

-2.1173E-01

3.9746E-01

-2.8088E+00

-1.5197E+01

1.6728E+02

-7.2811E+02

1.5291E+03

S4

2.1690E-01

-2.1521E+00

7.8579E+00

-3.7222E+01

9.6034E+01

-1.2874E+02

1.3627E+02

S5

-8.9744E-01

1.4298E+02

-6.2343E+03

1.6315E+05

-2.8229E+06

3.3837E+07

-2.8876E+08

S6

-1.0058E-01

-2.3579E+01

6.6062E+02

-1.0713E+04

1.2295E+05

-1.0552E+06

6.8598E+06

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

2.0200E+00

-1.5548E+00

8.5245E-01

-3.2489E-01

8.1797E-02

-1.2232E-02

8.2298E-04

S2

-1.9431E+00

-7.1302E+00

3.0187E+00

-2.7464E-01

0.0000E+00

S3

-1.4986E+03

5.1594E+02

4.7793E+01

-3.6495E+00

0.0000E+00

S4

-2.6655E+02

5.7422E+02

-8.4564E+02

8.0859E+02

-4.5057E+02

1.1002E+02

0.0000E+00

S5

1.7790E+09

-7.9328E+09

2.5354E+10

-5.6603E+10

8.3792E+10

-7.3885E+10

2.9366E+10

S6

-3.3668E+07

1.2335E+08

-3.3102E+08

6.3024E+08

-8.0495E+08

6.1784E+08

-2.1525E+08

TABLE 6

Fig. 10 shows an on-axis chromatic aberration curve of the optical imaging lens of example three, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 11 shows astigmatism curves of the optical imaging lens of example three, which represent meridional field curvature and sagittal field curvature. Fig. 12 shows distortion curves of the optical imaging lens of example three, which represent distortion magnitude values corresponding to different angles of view.

As can be seen from fig. 10 to 12, the optical imaging lens according to the third example can achieve good imaging quality.

Example four

As shown in fig. 13 to 16, an optical imaging lens of example four of the present application is described. Fig. 13 shows a schematic diagram of an optical imaging lens structure of example four.

As shown in fig. 13, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a filter E4, and an image plane S9.

The first lens element E1 has negative power, and the object-side surface S1 of the first lens element is concave, and the image-side surface S2 of the first lens element is convex. The second lens element E2 has positive refractive power, and the object-side surface S3 of the second lens element is concave, and the image-side surface S4 of the second lens element is convex. The third lens element E3 has positive refractive power, and the object-side surface S5 and the image-side surface S6 of the third lens element are convex. Filter E4 has an object side S7 and an image side S8 of the filter. The light from the object sequentially passes through the respective surfaces S1 to S8 and is finally imaged on the imaging surface S9.

In this example, the total effective focal length f of the optical imaging lens is 0.59mm, the maximum half field angle Semi-FOV of the optical imaging lens is 42.93 °, the total length TTL of the optical imaging lens is 3.20mm, and the image height ImgH is 0.55 mm.

Table 7 shows a basic structural parameter table of the optical imaging lens of example four, in which the units of the radius of curvature, the thickness/distance, the focal length, and the effective radius are all millimeters (mm).

TABLE 7

Table 8 shows the high-order term coefficients that can be used for each aspherical mirror surface in example four, wherein each aspherical mirror surface type can be defined by formula (1) given in example four above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

2.1012E+00

-5.9864E+00

1.4957E+01

-2.7490E+01

3.4635E+01

-2.8103E+01

1.3454E+01

S2

2.4598E+00

-3.7763E+00

1.0607E+01

-1.1934E+02

9.1424E+02

-3.4058E+03

6.3010E+03

S3

8.5528E-01

-1.9769E+01

1.9134E+02

-1.2057E+03

4.7009E+03

-1.1089E+04

1.5447E+04

S4

2.1072E-01

-2.3787E+00

2.5024E+01

-1.2970E+02

3.2538E+02

-2.5553E+02

8.0296E+00

S5

-2.1741E-01

1.4666E+00

-4.8397E+00

-2.3261E+01

2.9715E+02

-1.1304E+03

2.0978E+03

S6

1.0598E+00

-1.8575E+01

2.0659E+02

-1.3754E+03

5.7638E+03

-1.5589E+04

2.7328E+04

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

-3.1870E+00

2.2085E-01

0.0000E+00

S2

-4.7824E+03

-8.2046E+02

2.2870E+03

0.0000E+00

S3

-1.1711E+04

3.7290E+03

0.0000E+00

S4

-1.5261E+02

0.0000E+00

S5

-1.9331E+03

7.1974E+02

-2.3051E+01

0.0000E+00

S6

-3.0154E+04

1.9153E+04

-5.3852E+03

0.0000E+00

TABLE 8

Fig. 14 shows on-axis chromatic aberration curves of the optical imaging lens of example four, which represent the deviation of the convergence focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 15 shows astigmatism curves of the optical imaging lens of example four, which represent meridional field curvature and sagittal field curvature. Fig. 16 shows distortion curves of the optical imaging lens of example four, which represent distortion magnitude values corresponding to different angles of view.

As can be seen from fig. 14 to 16, the optical imaging lens according to example four can achieve good imaging quality.

Example five

As shown in fig. 17 to 20, an optical imaging lens of example five of the present application is described. Fig. 17 shows a schematic diagram of an optical imaging lens structure of example five.

As shown in fig. 17, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a filter E4, and an image plane S9.

In this example, the total effective focal length f of the optical imaging lens is 0.58mm, the maximum half field angle Semi-FOV of the optical imaging lens is 42.78 °, the total length TTL of the optical imaging lens is 3.25mm, and the image height ImgH is 0.55 mm.

Table 9 shows a basic structural parameter table of the optical imaging lens of example five, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 9

Table 10 shows the high-order term coefficients that can be used for each aspherical mirror surface in example five, wherein each aspherical mirror surface type can be defined by formula (1) given in example five above.

Watch 10

Fig. 18 shows an on-axis chromatic aberration curve of the optical imaging lens of example five, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the optical imaging lens. Fig. 19 shows astigmatism curves of the optical imaging lens of example five, which represent meridional field curvature and sagittal field curvature. Fig. 20 shows distortion curves of the optical imaging lens of example five, which represent distortion magnitude values corresponding to different angles of view.

As can be seen from fig. 17 to 20, the optical imaging lens according to example five can achieve good imaging quality.

Example six

As shown in fig. 21 to 24, an optical imaging lens of example six of the present application is described. Fig. 21 shows a schematic diagram of an optical imaging lens structure of example six.

As shown in fig. 21, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a filter E4, and an image plane S9.

In this example, the total effective focal length f of the optical imaging lens is 0.59mm, the maximum half field angle Semi-FOV of the optical imaging lens is 47.83 °, the total length TTL of the optical imaging lens is 3.19mm, and the image height ImgH is 0.65 mm.

Table 11 shows a basic structural parameter table of the optical imaging lens of example six, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 11

Table 12 shows the high-order term coefficients that can be used for each aspherical mirror surface in example six, wherein each aspherical mirror surface type can be defined by formula (1) given in example six above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

1.2448E+00

-2.6447E+00

5.1023E+00

-7.3074E+00

7.2480E+00

-4.7335E+00

1.9131E+00

S2

1.6057E+00

-5.7382E+00

4.6415E+01

-2.8257E+02

1.0263E+03

-2.0877E+03

2.0823E+03

S3

1.4439E+00

-4.2773E+01

8.6355E+02

-9.2959E+03

5.9164E+04

-2.2516E+05

4.9917E+05

S4

2.7090E+00

-1.9621E+01

2.0747E+02

-1.1899E+03

3.3195E+03

-1.3101E+03

-7.8705E+03

S5

1.4743E+00

3.1349E+00

-2.7210E+02

4.0852E+03

-3.3336E+04

1.6259E+05

-4.6329E+05

S6

2.4141E+00

-4.9433E+01

8.0368E+02

-7.7115E+03

4.5407E+04

-1.6356E+05

3.4233E+05

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

-4.2526E-01

3.8678E-02

0.0000E+00

S2

-5.0896E+02

-3.8014E+02

-1.1212E+01

0.0000E+00

S3

-5.8469E+05

2.7019E+05

0.0000E+00

S4

5.5016E+03

0.0000E+00

S5

6.8039E+05

-3.0022E+05

-2.0382E+05

0.0000E+00

S6

-3.4791E+05

4.1016E+04

1.4056E+05

0.0000E+00

TABLE 12

Fig. 22 shows an on-axis chromatic aberration curve of the optical imaging lens of example six, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the optical imaging lens. Fig. 23 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the optical imaging lens of example six. Fig. 24 shows distortion curves of the optical imaging lens of example six, which represent distortion magnitude values corresponding to different angles of view.

As can be seen from fig. 22 to 24, the optical imaging lens according to example six can achieve good imaging quality.

To sum up, examples one to six satisfy the relationships shown in table 13, respectively.

Table 13 table 14 shows effective focal lengths f of the optical imaging lenses of example one to example six, and effective focal lengths f1 to f3 of the respective lenses.

Example parameters	1	2	3	4	5	6
							f1(mm)	-0.96	-0.97	-0.78	-2.51	-0.99	-4.46
f2(mm)	1.31	1.29	1.09	2.61	1.33	3.17
							f3(mm)	0.87	0.89	0.85	0.99	0.87	0.98
f23(mm)	1.24	1.59	1.48	0.81	1.20	0.76
							f(mm)	0.58	0.60	0.58	0.59	0.58	0.59
TTL(mm)	3.25	3.45	3.18	3.20	3.25	3.19
							ImgH(mm)	0.55	0.55	0.55	0.55	0.55	0.65
Semi-FOV(°)	42.61	41.30	42.54	42.93	42.78	47.83

TABLE 14

The present application also provides an imaging device whose electron photosensitive element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

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

a first lens;

a second lens;

a third lens having a positive optical power;

the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens meet the following conditions: f/EPD <1.2;

the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, the half Semi-FOV of the maximum field angle of the optical imaging lens and the effective focal length f of the optical imaging lens meet 0.9< f/ImgH tan (Semi-FOV) < 1.1.

2. The optical imaging lens of claim 1, wherein the object side surface of the first lens is concave.

3. The optical imaging lens of claim 1, wherein the object side surface of the third lens is convex.

4. The optical imaging lens of claim 1, wherein an on-axis distance TTL from an object-side surface of the first lens element to an imaging surface of the optical imaging lens and an on-axis distance TD from the object-side surface of the first lens element to an image-side surface of the third lens element satisfy: 0.7< TD/TTL < 0.9.

5. The optical imaging lens of claim 1, wherein an on-axis distance TTL from an object side surface of the first lens element to an imaging surface of the optical imaging lens and an on-axis distance SL from a stop of the optical imaging lens to the imaging surface satisfy: 0.3< SL/TTL < 0.6.

6. The optical imaging lens of claim 1, wherein an on-axis distance TD from an object side surface of the first lens to an image side surface of the third lens, an ImgH that is a half of a diagonal length of an effective pixel area on an imaging surface of the optical imaging lens, and an aperture value fno of the optical imaging lens satisfy: 4< TD/ImgH fno < 6.

7. The optical imaging lens of claim 1, wherein an effective focal length f3 of the third lens, a combined focal length f23 of the second lens and the third lens, satisfy: 0.5< f3/f23< 1.5.

8. The optical imaging lens of claim 1, wherein the radius of curvature of the object-side surface of the third lens, R5, the radius of curvature of the image-side surface of the third lens, R6, and the effective focal length f3 of the third lens satisfy: 2< (R5-R6)/f3< 4.

9. The optical imaging lens of claim 1, further comprising a filter disposed between the third lens and the imaging surface of the optical imaging lens, wherein the wavelength of the light wave passing through the filter is greater than or equal to 900nm and less than or equal to 1000 nm.

10. The optical imaging lens according to claim 1, characterized in that a sum Σ AT of air intervals on an optical axis between any adjacent two lenses having optical powers of the first lens to the third lens and a sum Σ CT of center thicknesses on an optical axis of all lenses satisfy: 0.3< ∑ AT/Σ CT < 1.3.

11. The optical imaging lens according to claim 1, wherein a sum Σ CT of center thicknesses of all lenses on an optical axis, a distance BFL on the optical axis from an image side surface of the third lens to an imaging surface of the optical imaging lens, and an on-axis distance TD from an object side surface of the first lens to the image side surface of the third lens satisfy: 0.7< (BFL +. Sigma CT)/TD <1.

12. The optical imaging lens of claim 1, wherein a distance BFL from an image side surface of the third lens to an image surface of the optical imaging lens on an optical axis of the optical imaging lens, and an air interval T12 of the first lens and the second lens on the optical axis satisfy: 0.5< T12/BFL < 1.2.

13. The optical imaging lens according to claim 1, wherein a sum Σ CT of center thicknesses of all lenses on an optical axis of the optical imaging lens and a sum Σ ET of edge thicknesses of all lenses satisfy: 1< ∑ CT/Σ ET <2.

14. The optical imaging lens of claim 1, wherein a sum Σ CT of center thicknesses of all lenses on an optical axis of the optical imaging lens, a center thickness CT2 of the second lens on the optical axis of the optical imaging lens, and a center thickness CT3 of the third lens on the optical axis satisfy: 0.7< (CT2+ CT 3)/. Sigma CT < 0.8.

15. The optical imaging lens according to claim 1, wherein abbe number V1 of the first lens, abbe number V2 of the second lens and abbe number V3 of the third lens satisfy: v1+ V2+ V3< 70.

16. The optical imaging lens of claim 1, wherein a maximum effective radius DT11 of the object side surface of the first lens and a maximum effective radius DT31 of the object side surface of the third lens satisfy: 1.5< DT11/DT31 <3.

17. The optical imaging lens of claim 1, wherein the maximum effective radius DT22 of the image side surface of the second lens and the maximum effective radius DT32 of the image side surface of the third lens satisfy: 0.8< DT22/DT32< 1.5.

18. The optical imaging lens of claim 1, wherein the maximum effective radius DT11 of the object side surface of the first lens, the maximum effective radius DT21 of the object side surface of the second lens, and the effective radius SR of the stop of the optical imaging lens satisfy: 1< (DT11-DT21)/SR <2.

19. The optical imaging lens of claim 1, wherein an on-axis distance SAG21 between an intersection point of an object side surface of the second lens and an optical axis of the optical imaging lens and an effective radius vertex of the object side surface of the second lens and an on-axis distance SAG31 between an intersection point of an object side surface of the third lens and the optical axis and an effective radius vertex of the object side surface of the third lens satisfy: i SAG21-SAG31| < 0.1.

20. An optical imaging lens, comprising, in order from an object side of the optical imaging lens to an image side of the optical imaging lens:

a first lens;

a second lens;

a third lens having a positive optical power;

an on-axis distance TD from the object-side surface of the first lens element to the image-side surface of the third lens element, a half ImgH of a diagonal length of an effective pixel area on the imaging surface of the optical imaging lens, and an aperture value fno of the optical imaging lens satisfy: 4< TD/ImgH × fno < 6;

21. The optical imaging lens of claim 20, wherein the object side surface of the first lens is concave.

22. The optical imaging lens of claim 20, wherein the object side surface of the third lens is convex.

23. The optical imaging lens of claim 20, wherein an on-axis distance TTL from an object-side surface of the first lens element to an imaging surface of the optical imaging lens and an on-axis distance TD from the object-side surface of the first lens element to an image-side surface of the third lens element satisfy: 0.7< TD/TTL < 0.9.

24. The optical imaging lens of claim 20, wherein an on-axis distance TTL from an object side surface of the first lens element to an imaging surface of the optical imaging lens and an on-axis distance SL from a stop of the optical imaging lens to the imaging surface satisfy: 0.3< SL/TTL < 0.6.

25. The optical imaging lens of claim 20, wherein the effective focal length f3 of the third lens, the combined focal length f23 of the second lens and the third lens, satisfy: 0.5< f3/f23< 1.5.

26. The optical imaging lens of claim 20, wherein the radius of curvature of the object-side surface of the third lens R5, the radius of curvature of the image-side surface of the third lens R6, and the effective focal length f3 of the third lens satisfy: 2< (R5-R6)/f3< 4.

27. The optical imaging lens of claim 20, further comprising a filter disposed between the third lens and the imaging surface of the optical imaging lens, wherein the wavelength of the light wave passing through the filter is greater than or equal to 900nm and less than or equal to 1000 nm.

28. The optical imaging lens according to claim 20, wherein a sum Σ AT of air intervals on an optical axis between any adjacent two lenses having optical powers of the first lens to the third lens and a sum Σ CT of center thicknesses on the optical axis of all lenses satisfy: 0.3< ∑ AT/Σ CT < 1.3.

29. The optical imaging lens of claim 20, wherein a sum Σ CT of center thicknesses of all lenses on an optical axis, a distance BFL on the optical axis from an image side surface of the third lens to an imaging surface of the optical imaging lens, and an on-axis distance TD from an object side surface of the first lens to the image side surface of the third lens satisfy: 0.7< (BFL +. Sigma CT)/TD <1.

30. The optical imaging lens of claim 20, wherein a distance BFL from an image side surface of the third lens to an image surface of the optical imaging lens on an optical axis of the optical imaging lens, an air interval T12 of the first lens and the second lens on the optical axis satisfy: 0.5< T12/BFL < 1.2.

31. The optical imaging lens of claim 20, wherein a sum Σ CT of center thicknesses of all lenses on an optical axis of the optical imaging lens and a sum Σ ET of edge thicknesses of all lenses satisfy: 1< ∑ CT/Σ ET <2.

32. The optical imaging lens of claim 20, wherein a sum Σ CT of center thicknesses of all lenses on an optical axis of the optical imaging lens, a center thickness CT2 of the second lens on the optical axis of the optical imaging lens, and a center thickness CT3 of the third lens on the optical axis satisfy: 0.7< (CT2+ CT 3)/. Sigma CT < 0.8.

33. The optical imaging lens of claim 20, wherein abbe number V1 of the first lens, abbe number V2 of the second lens and abbe number V3 of the third lens satisfy: v1+ V2+ V3< 70.

34. The optical imaging lens of claim 20, wherein the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT31 of the object side surface of the third lens satisfy: 1.5< DT11/DT31 <3.

35. The optical imaging lens of claim 20, wherein the maximum effective radius DT22 of the image side surface of the second lens and the maximum effective radius DT32 of the image side surface of the third lens satisfy: 0.8< DT22/DT32< 1.5.

36. The optical imaging lens of claim 20, wherein the maximum effective radius DT11 of the object side surface of the first lens, the maximum effective radius DT21 of the object side surface of the second lens, and the effective radius SR of the stop of the optical imaging lens satisfy: 1< (DT11-DT21)/SR <2.

37. The optical imaging lens of claim 20, wherein an on-axis distance SAG21 between an intersection point of an object side surface of the second lens and an optical axis of the optical imaging lens and an effective radius vertex of the object side surface of the second lens and an on-axis distance SAG31 between an intersection point of an object side surface of the third lens and the optical axis and an effective radius vertex of the object side surface of the third lens satisfy: i SAG21-SAG31| < 0.1.