CN216210175U

CN216210175U - Optical imaging lens

Info

Publication number: CN216210175U
Application number: CN202122222850.4U
Authority: CN
Inventors: 高劲柏; 宋立通; 金银芳; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-04-05
Anticipated expiration: 2031-09-14

Abstract

The utility model provides an optical imaging lens. The imaging lens sequentially comprises from the object side to the image side of the imaging lens: a first lens; a second lens; the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; a fourth lens having a negative focal power; the maximum effective radius DT11 of the object side surface of the first lens and the aperture value fno of the optical imaging lens satisfy the following condition: 0.3mm < DT11/fno <0.5 mm; the maximum effective radius DT11 of the object side surface of the first lens and the distance SD between the diaphragm of the optical imaging lens and the image side surface of the fourth lens on the optical axis of the optical imaging lens satisfy that: DT11/SD < 0.3. The utility model solves the problem that the lens in the prior art is difficult to miniaturize.

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 increasingly intense competition among imaging digital consumer products, the shots with different functions are continuously mined and iterated, so that the reliability and satisfaction of customers are improved. Among them, the TOF (Time-of-Flight) shot has its own unique advantages, and is growing in order in market share, showing excellent potential.

The TOF lens carries out inversion by transmitting and receiving infrared signal pulses and utilizing the acquired time difference or phase difference to reproduce the environmental depth information. Compared with the structured light technology, the TOF lens has more excellent blurring capability and has remarkable advantages in the aspects of calculation time, effective depth and the like. If this technique combines together with big light ring, will have faster speed of shooing under the equal illumination condition to outstanding formation of image main part in the depth scanning promotes like the matter in coordination, occupies more important position in fields such as unmanned driving, AR modeling, medical treatment control and gesture recognition. And secondly, the small-head lens is convenient to hide and more attractive in design, conforms to the industrial development rule, and can effectively improve the market competitiveness of related products. However, in the prior art, the lens with a large aperture is difficult to realize miniaturization.

That is, the lens in the prior art has a problem that miniaturization is difficult.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide an optical imaging lens to solve the problem that the lens in the prior art is difficult to miniaturize.

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 to an image side of the optical imaging lens: a first lens; a second lens; the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; a fourth lens having a negative focal power; the maximum effective radius DT11 of the object side surface of the first lens and the aperture value fno of the optical imaging lens satisfy the following condition: 0.3mm < DT11/fno <0.5 mm; the maximum effective radius DT11 of the object side surface of the first lens and the distance SD between the diaphragm of the optical imaging lens and the image side surface of the fourth lens on the optical axis of the optical imaging lens satisfy that: DT11/SD < 0.3.

Further, the maximum effective radius SR of the diaphragm of the optical imaging lens meets the following requirements: SR <0.7 mm.

Further, the maximum effective radius DT11 of the object side surface of the first lens and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens satisfy: DT11/ImgH < 0.4.

Further, the maximum effective radius DT41 of the object side surface of the fourth lens and the maximum effective radius DT11 of the object side surface of the first lens satisfy: 2< DT41/DT11< 3.

Furthermore, an on-axis distance TTL from the object-side surface of the first lens element to the imaging surface of the optical imaging lens, an effective focal length f of the optical imaging lens, and an aperture value fno of the optical imaging lens satisfy 0.8< TTL/(f × fno) <1.

Further, the effective focal length f of the optical imaging lens, the combined focal length f123 of the first lens, the second lens and the third lens satisfy: 1< f/f123< 1.2.

Further, the effective focal length f1 of the first lens, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy: 0.6< (f3-f4)/(f1-f4) <1.

Furthermore, an optical filter is arranged between the fourth lens and the imaging surface of the optical imaging lens, and the band-pass wavelength of the optical filter is greater than or equal to 900nm and less than or equal to 1000 nm.

Further, the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R7 of the object-side surface of the fourth lens satisfy: 0.9< | R5/R7| < 1.2.

Further, a radius of curvature R6 of the image-side surface of the third lens and a radius of curvature R8 of the image-side surface of the fourth lens satisfy: 1< | R6/R8| < 1.3.

Further, a radius of curvature R7 of the object-side surface of the fourth lens and a radius of curvature R8 of the image-side surface of the fourth lens satisfy: 4< (R7+ R8)/(R7-R8) < 5.

Further, a stop is provided between the first lens and the subject.

Further, the first lens has a positive optical power.

Further, a center thickness CT1 of the first lens on the optical axis of the optical imaging lens, a center thickness CT2 of the second lens on the optical axis, an air interval T12 of the first lens and the second lens on the optical axis, and an on-axis distance TD from an object side surface of the first lens to an image side surface of the fourth lens satisfy: 0.5< (CT1+ CT2+ T12)/TD < 0.6.

Further, a distance BFL from the image-side surface of the fourth lens element to the imaging surface of the optical imaging lens on the optical axis of the optical imaging lens and an on-axis distance TTL from the object-side surface of the first lens element to the imaging surface satisfy: 0.3< BFL/TTL < 0.5.

Further, the sum Σ AT of the air intervals on the optical axis of the optical imaging lens between any adjacent two lenses having optical powers of the first lens to the fourth lens, and the air interval T34 on the optical axis of the third lens and the fourth lens satisfy: T34/SIGMA AT < 0.1.

Further, a center thickness CT3 of the third lens on the optical axis of the optical imaging lens, a center thickness CT4 of the fourth lens on the optical axis, and a sum Σ CT of center thicknesses of the first lens to the fourth lens on the optical axis satisfy: 0.4< (CT3+ CT 4)/. Sigma CT < 0.6.

Further, the central thickness CT2 of the second lens on the optical axis of the optical imaging lens and the edge thickness ET2 of the second lens satisfy: 0.8< CT2/ET2< 1.1.

Further, an on-axis distance SAG22 from 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 from 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: 0.4< SAG21/SAG31< 0.6.

According to another aspect of the present invention, there is provided an optical imaging lens, comprising in order from an object side to an image side of the optical imaging lens: a first lens; a second lens; the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; a fourth lens having a negative focal power; the maximum effective radius DT11 of the object side surface of the first lens and the aperture value fno of the optical imaging lens satisfy the following condition: 0.3mm < DT11/fno <0.5 mm; an on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens, an effective focal length f of the optical imaging lens and an aperture value fno of the optical imaging lens meet 0.8< TTL/(f × fno) <1.

Further, the maximum effective radius DT11 of the object side surface of the first lens and the distance SD from the diaphragm of the optical imaging lens to the image side surface of the fourth lens on the optical axis of the optical imaging lens satisfy: DT11/SD < 0.3.

Further, a stop is provided between the first lens and the subject.

Further, the first lens has a positive optical power.

By applying the technical scheme of the utility model, the optical imaging lens sequentially comprises a first lens, a second lens, a third lens and a fourth lens from the object side to the image side of the optical imaging lens, wherein the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; the fourth lens has negative focal power; the maximum effective radius DT11 of the object side surface of the first lens and the aperture value fno of the optical imaging lens satisfy the following condition: 0.3mm < DT11/fno <0.5 mm; the maximum effective radius DT11 of the object side surface of the first lens and the distance SD between the diaphragm of the optical imaging lens and the image side surface of the fourth lens on the optical axis of the optical imaging lens satisfy that: DT11/SD < 0.3.

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 optical power and the surface type of the first lens and the second lens are reasonably designed, so that the first lens has good machinability, the small head of the optical imaging lens is convenient to further realize, and the structure of the optical imaging lens is compact. The surface type of the third lens is reasonably matched, which is beneficial to correcting the off-axis aberration of the optical imaging lens, improving the imaging quality and increasing the relative illumination of each view field. The optical power of the fourth lens is reasonably matched, so that the matching degree of the main light chip can be effectively improved, and the tolerance sensitivity of the optical imaging lens is reduced. By limiting the relationship of DT11/fno, the design characteristics of the large diaphragm and the small head are both considered for the optical imaging lens, so that the optical imaging lens can simultaneously possess the characteristics of the large diaphragm and the small head. The proportional relation between the maximum effective radius of the object side surface of the first lens and the half-image height of the imaging surface is reasonably configured, the object space view field can be effectively shared, the distortion of the optical imaging lens is corrected, and therefore the imaging quality of the optical imaging lens is improved.

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 5 respectively show axial chromatic aberration curves, astigmatism curves, distortion curves, and field angles versus relative illuminance curves of the optical imaging lens of fig. 1;

fig. 6 is a schematic view showing a configuration of an optical imaging lens according to a second example of the present invention;

fig. 7 to 10 respectively show axial chromatic aberration curves, astigmatism curves, distortion curves, and field angles versus relative illuminance curves of the optical imaging lens in fig. 6;

fig. 11 is a schematic structural view showing an optical imaging lens of example three of the present invention;

fig. 12 to 15 show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a field angle versus relative illuminance curve of the optical imaging lens in fig. 11, respectively;

fig. 16 is a schematic configuration diagram showing an optical imaging lens of example four of the present invention;

fig. 17 to 20 respectively show axial chromatic aberration curves, astigmatism curves, distortion curves, and field angles versus relative illuminance curves of the optical imaging lens of fig. 16;

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

fig. 22 to 25 show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a field angle versus relative illuminance 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, fourth lens; s7, the object side surface of the fourth lens; s8, an image side surface of the fourth lens element; e5, a filter plate; s9, the object side surface of the filter plate; s10, the image side surface of the filter plate; and S11, 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 that the lens in the prior art is difficult to miniaturize.

Example one

As shown in fig. 1 to 25, the optical imaging lens includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element and a fourth lens element, wherein an object-side surface of the third lens element is a concave surface, and an image-side surface of the third lens element is a convex surface; the fourth lens has negative focal power; the maximum effective radius DT11 of the object side surface of the first lens and the aperture value fno of the optical imaging lens satisfy the following condition: 0.3mm < DT11/fno <0.5 mm; the maximum effective radius DT11 of the object side surface of the first lens and the distance SD between the diaphragm of the optical imaging lens and the image side surface of the fourth lens on the optical axis of the optical imaging lens satisfy that: DT11/SD < 0.3.

Preferably, the maximum effective radius DT11 of the object side surface of the first lens and the aperture value fno of the optical imaging lens satisfy: 0.3mm < DT11/fno <0.4 mm; the maximum effective radius DT11 of the object side surface of the first lens and the distance SD between the diaphragm of the optical imaging lens and the image side surface of the fourth lens on the optical axis of the optical imaging lens satisfy that: 0.2<0DT11/SD < 0.28.

In the present embodiment, the maximum effective radius SR of the diaphragm of the optical imaging lens satisfies: SR <0.7 mm. The size of the maximum effective radius of the diaphragm is reasonably controlled, so that the optical imaging lens can be ensured to have the characteristics of a large aperture and a small head, and the unique advantages of high-speed identification and high-quality appearance of the optical imaging lens are formed.

In the present embodiment, the maximum effective radius DT11 of the object side surface of the first lens and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens satisfy: DT11/ImgH < 0.4. The proportional relation between the maximum effective radius of the object side surface of the first lens and the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens is reasonably configured, so that the object space view field can be effectively shared, the distortion of the optical imaging lens can be corrected, and the imaging quality of the optical imaging lens can be improved. Preferably 0.25< DT11/ImgH < 0.36.

In the present embodiment, the maximum effective radius DT41 of the object-side surface of the fourth lens and the maximum effective radius DT11 of the object-side surface of the first lens satisfy: 2< DT41/DT11< 3. The reasonable design of the proportional relation between the apertures of the fourth lens and the first lens is beneficial to improving the surface shapes of the first lens and the fourth lens, increasing the processability and improving the matching degree of the incident angles of the chief rays of each field of view of the imaging chip. Preferably, 2.2< DT41/DT11< 2.8.

In this embodiment, an on-axis distance TTL from the object-side surface of the first lens element to the image plane of the optical imaging lens, an effective focal length f of the optical imaging lens, and an aperture fno of the optical imaging lens satisfy 0.8< TTL/(f × fno) <1. The TTL/(f × fno) range is reasonably limited, and the advantages of small head and short optical total length can be achieved on the basis that the optical imaging lens has better imaging quality. Preferably, 0.8< TTL/(f × fno) < 0.95.

In the present embodiment, the effective focal length f of the optical imaging lens, the combined focal length f123 of the first lens, the second lens, and the third lens satisfy: 1< f/f123< 1.2. By limiting the f/f123 within a reasonable range, the reasonable distribution of the focal power of the first three lenses is facilitated, the off-axis aberration is effectively corrected, and the imaging quality of the optical imaging lens is improved. Preferably, 1.01< f/f123< 1.15.

In the present embodiment, the effective focal length f1 of the first lens, the effective focal length f3 of the third lens, and the effective focal length f4 of the fourth lens satisfy: 0.6< (f3-f4)/(f1-f4) <1. By limiting (f3-f4)/(f1-f4) within a reasonable range, the focal power of each lens can be reasonably distributed, the spherical aberration of the optical imaging lens can be eliminated, and the curvature of field and astigmatism of the optical imaging lens are optimized, so that the optical imaging lens has better imaging quality. Preferably, 0.65< (f3-f4)/(f1-f4) < 0.95.

In this embodiment, an optical filter is disposed between the fourth lens element and the imaging surface of the optical imaging lens, and a band-pass wavelength of the optical filter is greater than or equal to 900nm and less than or equal to 1000 nm. The band-pass filtering section of the optical filter is limited in a reasonable range, so that the risk of ghost images and stray light can be effectively reduced, and the contrast of the optical imaging lens is improved.

In the present embodiment, the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R7 of the object-side surface of the fourth lens satisfy: 0.9< | R5/R7| < 1.2. By limiting R5/R7 in a reasonable range, the spherical aberration of the optical imaging lens can be eliminated, the off-axis aberration of the optical imaging lens is optimized, and the stray light influence is weakened, so that better imaging quality is ensured. Preferably, 0.9< | R5/R7| < 1.15.

In the present embodiment, a radius of curvature R6 of the image-side surface of the third lens and a radius of curvature R8 of the image-side surface of the fourth lens satisfy: 1< | R6/R8| < 1.3. By limiting R6/R8 in a reasonable range, off-axis aberration can be effectively improved, and better imaging quality is ensured; meanwhile, the third lens and the fourth lens have good machinability, and the relative illumination of an imaging surface is favorably improved. Preferably, 1.1< | R6/R8| < 1.29.

In the present embodiment, a radius of curvature R7 of the object-side surface of the fourth lens and a radius of curvature R8 of the image-side surface of the fourth lens satisfy: 4< (R7+ R8)/(R7-R8) < 5. By limiting (R7+ R8)/(R7-R8) within a reasonable range, the matching degree of the incident angle of the chief ray of the chip is improved, the relative illumination of each field of view is enhanced, and the imaging quality of the optical imaging lens is improved. Preferably, 4.05< (R7+ R8)/(R7-R8) < 4.98.

In this embodiment, a stop is provided between the first lens and the subject. Through setting up the diaphragm between first lens and the object of shooing, help optical imaging lens to design into the specification of little head, can also make optical imaging lens compromise the characteristic of big light ring simultaneously, realize high-speed formation of image. In the present embodiment, the first lens has positive optical power. The optical power of the first lens is reasonably distributed, so that the optical imaging lens has the advantage of a large field angle, the light beam converging capability of the optical imaging lens is improved, the size of the head of the optical imaging lens is further reduced, and the structure of the optical imaging lens is more compact.

In the present embodiment, the central thickness CT1 of the first lens on the optical axis of the optical imaging lens, the central thickness CT2 of the second lens on the optical axis, the air interval T12 of the first lens and the second lens on the optical axis, and the on-axis distance TD from the object-side surface of the first lens to the image-side surface of the fourth lens satisfy: 0.5< (CT1+ CT2+ T12)/TD < 0.6. By limiting (CT1+ CT2+ T12)/TD to a reasonable range, the optical power of the first lens and the second lens is favorably distributed, and the small size advantage of the optical imaging lens is ensured; meanwhile, the sensitivity of the thickness of the optical imaging lens is effectively reduced, and the processing yield is improved. Preferably, 0.5< (CT1+ CT2+ T12)/TD < 0.56.

In this embodiment, a distance BFL between the image-side surface of the fourth lens element and the imaging surface of the optical imaging lens on the optical axis of the optical imaging lens and an on-axis distance TTL between the object-side surface of the first lens element and the imaging surface satisfy: 0.3< BFL/TTL < 0.5. By limiting the BFL/TTL within a reasonable range, the matching degree of a field-of-view chief ray and a target chip is improved, the illumination of an imaging surface is improved, and the field curvature is corrected. Preferably, 0.3< BFL/TTL < 0.4.

In the present embodiment, the sum Σ AT of the air intervals on the optical axis of the optical imaging lens between any adjacent two lenses having optical powers of the first to fourth lenses, and the air interval T34 on the optical axis of the third and fourth lenses satisfy: T34/SIGMA AT < 0.1. By limiting T34/sigma AT within a reasonable range, the thickness sensitivity of the optical imaging lens can be effectively reduced, and the processing yield is improved; the light ray lifting angle is optimized, and the relative illumination of the optical imaging lens is improved. Preferably, 0.03< T34/∑ AT < 0.09.

In the present embodiment, the center thickness CT3 of the third lens on the optical axis of the optical imaging lens, the center thickness CT4 of the fourth lens on the optical axis, and the sum Σ CT of the center thicknesses of the first to fourth lenses on the optical axis satisfy: 0.4< (CT3+ CT 4)/. Sigma CT < 0.6. By limiting the (CT3+ CT 4)/[ sigma ] CT to a reasonable range, the optical power of the third lens and the optical power of the fourth lens are distributed beneficially, the light convergence capacity is improved, and the curvature of field is corrected; and effectively optimize the smoothness of the lens surface shape and improve the injection molding yield of the lens. Preferably, 0.42< (CT3+ CT 4)/. Sigma CT < 0.56.

In the present embodiment, the center thickness CT2 of the second lens on the optical axis of the optical imaging lens and the edge thickness ET2 of the second lens satisfy: 0.8< CT2/ET2< 1.1. By limiting the CT2/ET2 within a reasonable range, the yield of the injection molding of the second lens can be effectively improved, and the processability of the second lens can be improved. Preferably 0.82< CT2/ET2< 1.05.

In this embodiment, the on-axis distance SAG22 between the intersection point of the object-side surface of the second lens and the optical axis of the optical imaging lens and the effective radius vertex of the object-side surface of the second lens, and the on-axis distance SAG31 between the intersection point of the object-side surface of the third lens and the optical axis and the effective radius vertex of the object-side surface of the third lens satisfy: 0.4< SAG21/SAG31< 0.6. By limiting SAG21/SAG31 within a reasonable range, spherical aberration and coma aberration of the optical imaging lens can be effectively optimized, and better imaging quality is ensured. Preferably, 0.42< SAG21/SAG31< 0.6.

Example two

As shown in fig. 1 to 25, the optical imaging lens includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element and a fourth lens element, wherein an object-side surface of the third lens element is a concave surface, and an image-side surface of the third lens element is a convex surface; the fourth lens has negative focal power; the maximum effective radius DT11 of the object side surface of the first lens and the aperture value fno of the optical imaging lens satisfy the following condition: 0.3mm < DT11/fno <0.5 mm; an on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens, an effective focal length f of the optical imaging lens and an aperture value fno of the optical imaging lens meet 0.8< TTL/(f × fno) <1.

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 optical power and the surface type of the first lens and the second lens are reasonably designed, so that the first lens has good machinability, the small head of the optical imaging lens is convenient to further realize, and the structure of the optical imaging lens is compact. The surface type of the third lens is reasonably matched, which is beneficial to correcting the off-axis aberration of the optical imaging lens, improving the imaging quality and increasing the relative illumination of each view field. The optical power of the fourth lens is reasonably matched, so that the matching degree of the main light chip can be effectively improved, and the tolerance sensitivity of the optical imaging lens is reduced. By limiting the relationship of DT11/fno, the design characteristics of the large diaphragm and the small head are both considered for the optical imaging lens, so that the optical imaging lens can simultaneously possess the characteristics of the large diaphragm and the small head. The TTL/(f × fno) range is reasonably limited, and the advantages of small head and short optical total length can be achieved on the basis that the optical imaging lens has better imaging quality. .

Preferably, the maximum effective radius DT11 of the object side surface of the first lens and the aperture value fno of the optical imaging lens satisfy: 0.3mm < DT11/fno <0.4 mm; the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens, the effective focal length f of the optical imaging lens and the aperture value fno of the optical imaging lens meet the following requirements: 0.25< DT11/ImgH <0.36, preferably 0.8< TTL/(f × fno) < 0.95.

In the present embodiment, the maximum effective radius DT11 of the object side surface of the first lens and the distance SD from the stop of the optical imaging lens to the image side surface of the fourth lens on the optical axis of the optical imaging lens satisfy: DT11/SD < 0.3. The proportional relation between the maximum effective radius of the object side surface of the first lens and the half-image height of the imaging surface is reasonably configured, the object space view field can be effectively shared, the distortion of the optical imaging lens is corrected, and therefore the imaging quality of the optical imaging lens is improved. Preferably, 0.2<0DT11/SD < 0.28.

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, four lenses as 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 four lenses are exemplified in the embodiment, the optical imaging lens is not limited to including four 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 five is applicable to all embodiments of the present application.

Example one

As shown in fig. 1 to 5, 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: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, filter E5, and image plane S11.

The first lens element E1 has positive refractive power, and the object-side surface S1 of the first lens element is convex, 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 of the third lens element is concave, and the image-side surface S6 of the third lens element is convex. The fourth lens element E4 has negative power, and the object-side surface S7 of the fourth lens element is convex and the image-side surface S8 of the fourth lens element is concave. Filter E5 has an object side S9 and an image side S10 of the filter. The light from the subject passes through the respective surfaces S1 to S10 in order and is finally imaged on the imaging surface S11.

In this example, the total effective focal length f of the optical imaging lens is 2.59mm, the maximum half field angle Semi-FOV of the optical imaging lens is 39.34 °, the total length TTL of the optical imaging lens is 4.15mm, and the image height ImgH is 2.07 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 the first example, the object-side surface and the image-side surface of any one of the first lens element E1 through the fifth lens element E5 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 that can be used for each of the aspherical mirrors S1-S8 in example one.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-2.7607E-02

-5.9268E-02

5.2082E-01

-4.2215E+00

1.7870E+01

-4.2066E+01

5.1681E+01

-2.5867E+01

0.0000E+00

S2

-1.3091E-01

-6.5722E-02

-2.9097E-01

2.4702E+00

-9.4200E+00

1.9224E+01

-2.0110E+01

8.5054E+00

0.0000E+00

S3

-1.3534E-01

-4.8265E-02

-2.2988E+00

1.0449E+01

-2.9939E+01

4.9995E+01

-4.6017E+01

2.2229E+01

-4.5913E+00

S4

9.3860E-02

-2.3878E-01

-2.1976E-01

2.4865E+00

-8.4696E+00

1.6356E+01

-1.8100E+01

1.0365E+01

-2.3589E+00

S5

6.0111E-01

-1.3587E+00

4.2823E+00

-9.0078E+00

1.3735E+01

-1.4061E+01

8.2632E+00

-2.3131E+00

1.9915E-01

S6

-8.3124E-01

2.6810E+00

-7.6394E+00

1.5915E+01

-2.2603E+01

2.1025E+01

-1.2043E+01

3.8079E+00

-5.0428E-01

S7

-3.9135E-01

1.4780E-01

9.8027E-02

-3.1604E-01

3.3989E-01

-2.0152E-01

6.8489E-02

-1.2413E-02

9.2790E-04

S8

-1.1594E-01

7.3221E-02

-6.5414E-02

4.9219E-02

-2.5952E-02

8.8961E-03

-1.9079E-03

2.3181E-04

-1.1866E-05

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. Fig. 5 shows a graph of the relationship between the angle of view and the relative illuminance of the optical imaging lens of the first example, which shows the variation of the relative illuminance with the angle of view.

Example two

As shown in fig. 6 to 10, 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. 6 shows a schematic diagram of the optical imaging lens structure of example two.

As shown in fig. 6, the optical imaging lens includes, in order from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, filter E5, and image plane S11.

The first lens element E1 has positive refractive power, and the object-side surface S1 of the first lens element is convex, 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 and the image-side surface S4 of the second lens element are convex. The third lens element E3 has positive refractive power, and the object-side surface S5 of the third lens element is concave, and the image-side surface S6 of the third lens element is convex. The fourth lens element E4 has negative power, and the object-side surface S7 of the fourth lens element is convex and the image-side surface S8 of the fourth lens element is concave. Filter E5 has an object side S9 and an image side S10 of the filter. The light from the subject passes through the respective surfaces S1 to S10 in order and is finally imaged on the imaging surface S11.

In this example, the total effective focal length f of the optical imaging lens is 2.58mm, the maximum half field angle Semi-FOV of the optical imaging lens is 39.65 °, the total length TTL of the optical imaging lens is 4.05mm, and the image height ImgH is 2.09 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 one above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-6.2891E-03

-1.6569E-01

1.5802E+00

-1.0527E+01

3.9951E+01

-8.7982E+01

1.0361E+02

-5.0603E+01

0.0000E+00

S2

-9.3842E-02

-1.9106E-01

3.8974E-01

-1.4675E+00

2.1356E+00

-1.7715E-02

-3.6870E+00

3.1699E+00

0.0000E+00

S3

-2.2585E-01

-3.2007E-01

-9.3443E-02

1.3487E+00

-9.6673E+00

2.4857E+01

-3.4032E+01

2.7670E+01

-9.5988E+00

S4

1.0778E-01

-1.1401E+00

5.4080E+00

-1.8031E+01

3.9411E+01

-5.4109E+01

4.4541E+01

-2.0249E+01

3.9551E+00

S5

7.3262E-01

-3.2503E+00

1.3997E+01

-4.1580E+01

8.4831E+01

-1.1228E+02

9.0765E+01

-4.0669E+01

7.7457E+00

S6

-8.8339E-01

2.5861E+00

-6.8531E+00

1.3888E+01

-1.9836E+01

1.9080E+01

-1.1460E+01

3.8064E+00

-5.2801E-01

S7

-6.4776E-01

7.6177E-01

-9.2315E-01

9.1150E-01

-6.7961E-01

3.5472E-01

-1.1962E-01

2.3087E-02

-1.9185E-03

S8

-2.3478E-01

2.8932E-01

-2.9835E-01

2.2314E-01

-1.1820E-01

4.2555E-02

-9.8040E-03

1.2907E-03

-7.3158E-05

TABLE 4

Fig. 7 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. 8 shows astigmatism curves of the optical imaging lens of example two, which represent meridional field curvature and sagittal field curvature. Fig. 9 shows distortion curves of the optical imaging lens of example two, which indicate distortion magnitude values corresponding to different angles of view. Fig. 10 shows a graph of the angle of view of the optical imaging lens of example two with respect to the relative illuminance, which shows the variation of the relative illuminance with the angle of view.

Example III

As shown in fig. 11 to 15, an optical imaging lens of example three of the present application is described. Fig. 11 shows a schematic diagram of an optical imaging lens structure of example three.

As shown in fig. 11, the optical imaging lens includes, in order from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, filter E5, and image plane S11.

The first lens element E1 has positive refractive power, and the object-side surface S1 of the first lens element is convex, and the image-side surface S2 of the first lens element is concave. The second lens element E2 has negative 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 of the third lens element is concave, and the image-side surface S6 of the third lens element is convex. The fourth lens element E4 has negative power, and the object-side surface S7 of the fourth lens element is convex and the image-side surface S8 of the fourth lens element is concave. Filter E5 has an object side S9 and an image side S10 of the filter. The light from the subject passes through the respective surfaces S1 to S10 in order and is finally imaged on the imaging surface S11.

In this example, the total effective focal length f of the optical imaging lens is 2.56mm, the maximum half field angle Semi-FOV of the optical imaging lens is 37.50 °, the total length TTL of the optical imaging lens is 3.95mm, and the image height ImgH is 2.00 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 one above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

7.7107E-04

-7.0310E-02

4.6210E-01

-3.7660E+00

1.6192E+01

-4.0140E+01

5.2100E+01

-2.7878E+01

0.0000E+00

S2

-7.7461E-02

-1.5246E-01

1.4736E-01

-1.5957E+00

5.7621E+00

-1.2092E+01

1.2761E+01

-5.1146E+00

0.0000E+00

S3

-2.4751E-01

-3.7461E-01

5.2509E-01

-2.1043E+00

-5.9265E-01

1.3597E+01

-3.2414E+01

3.8011E+01

-1.6299E+01

S4

2.9898E-02

-9.2540E-01

4.7072E+00

-1.5854E+01

3.4250E+01

-4.7610E+01

4.1467E+01

-2.0819E+01

4.6183E+00

S5

5.8274E-01

-2.6010E+00

1.0896E+01

-2.9010E+01

5.1586E+01

-5.9197E+01

4.1327E+01

-1.5751E+01

2.4409E+00

S6

-8.7739E-01

2.6873E+00

-7.6251E+00

1.6684E+01

-2.5515E+01

2.5963E+01

-1.6352E+01

5.6798E+00

-8.2658E-01

S7

-6.1971E-01

8.8480E-01

-1.1052E+00

9.8085E-01

-6.0119E-01

2.4743E-01

-6.4753E-02

9.6404E-03

-6.1591E-04

S8

-2.0536E-01

3.2392E-01

-3.9257E-01

3.1619E-01

-1.6980E-01

5.9849E-02

-1.3231E-02

1.6551E-03

-8.9035E-05

TABLE 6

Fig. 12 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. 13 shows astigmatism curves of the optical imaging lens of example three, which represent meridional field curvature and sagittal field curvature. Fig. 14 shows distortion curves of the optical imaging lens of example three, which represent distortion magnitude values corresponding to different angles of view. Fig. 15 shows a graph of the angle of view versus the relative illuminance of the optical imaging lens of example three, which shows the variation of the relative illuminance with the angle of view.

Example four

As shown in fig. 16 to 20, an optical imaging lens of example four of the present application is described. Fig. 16 shows a schematic diagram of an optical imaging lens structure of example four.

The first lens element E1 has positive refractive power, and the object-side surface S1 and the image-side surface S2 of the first lens element are convex. 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 of the third lens element is concave, and the image-side surface S6 of the third lens element is convex. The fourth lens element E4 has negative power, and the object-side surface S7 of the fourth lens element is convex and the image-side surface S8 of the fourth lens element is concave. Filter E5 has an object side S9 and an image side S10 of the filter. The light from the subject passes through the respective surfaces S1 to S10 in order and is finally imaged on the imaging surface S11.

In this example, the total effective focal length f of the optical imaging lens is 2.41mm, the maximum half field angle Semi-FOV of the optical imaging lens is 40.97 °, the total length TTL of the optical imaging lens is 3.95mm, and the image height ImgH is 2.05 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 one above.

TABLE 8

Fig. 17 shows an on-axis chromatic aberration curve of the optical imaging lens of example four, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 18 shows astigmatism curves of the optical imaging lens of example four, which represent meridional field curvature and sagittal field curvature. Fig. 19 shows distortion curves of the optical imaging lens of example four, which represent distortion magnitude values corresponding to different angles of view. Fig. 20 shows a graph of the angle of view versus the relative illuminance for the optical imaging lens of example four, which shows the variation of the relative illuminance with the angle of view.

Example five

As shown in fig. 21 to 25, an optical imaging lens of example five of the present application is described. Fig. 21 shows a schematic diagram of an optical imaging lens structure of example five.

As shown in fig. 21, the optical imaging lens includes, in order from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, filter E5, and image plane S11.

In this example, the total effective focal length f of the optical imaging lens is 2.5mm, the maximum half field angle Semi-FOV of the optical imaging lens is 39.72 °, the total length TTL of the optical imaging lens is 4.26mm, and the image height ImgH is 2.02 mm.

Table 11 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 11

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 one above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

2.2220E-03

-5.4061E-01

5.9946E+00

-3.9256E+01

1.5205E+02

-3.4357E+02

4.1827E+02

-2.1186E+02

0.0000E+00

S2

-1.5970E-01

4.6614E-02

-1.4442E+00

7.2991E+00

-1.8876E+01

2.7891E+01

-2.1857E+01

7.0513E+00

0.0000E+00

S3

-4.0319E-02

-5.5114E-01

-9.2870E-01

8.9054E+00

-3.5767E+01

7.5621E+01

-8.3662E+01

4.6328E+01

-1.0157E+01

S4

2.5103E-01

-5.6192E-01

3.2908E-01

8.0019E-01

-3.8444E+00

7.9284E+00

-8.8605E+00

5.0445E+00

-1.1392E+00

S5

5.9558E-01

-3.6388E-01

-2.0909E+00

1.3108E+01

-3.2004E+01

4.2781E+01

-3.3233E+01

1.4096E+01

-2.5189E+00

S6

-1.0732E+00

4.2453E+00

-1.3111E+01

2.7696E+01

-3.8983E+01

3.5987E+01

-2.0783E+01

6.7668E+00

-9.4322E-01

S7

-1.9620E-01

-1.8243E-01

4.1836E-01

-4.4819E-01

3.0963E-01

-1.4352E-01

4.2522E-02

-7.1619E-03

5.1707E-04

S8

6.7901E-02

-2.8574E-01

3.6889E-01

-2.9274E-01

1.5285E-01

-5.2977E-02

1.1721E-02

-1.4959E-03

8.3767E-05

Watch 10

Fig. 22 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. 23 shows astigmatism curves of the optical imaging lens of example five, which represent meridional field curvature and sagittal field curvature. Fig. 24 shows distortion curves of the optical imaging lens of example five, which represent distortion magnitude values corresponding to different angles of view. Fig. 25 shows a view angle versus relative illuminance curve of the optical imaging lens of example five, which shows a variation in relative illuminance with a view angle.

To sum up, examples one to five respectively satisfy the relationships shown in table 11.

Conditions/examples	1	2	3	4	5
						DT11/SD	0.25	0.26	0.26	0.24	0.23
DT11/fno	0.37	0.36	0.36	0.32	0.36
						DT41/DT11	2.42	2.34	2.40	2.68	2.47
DT11/ImgH	0.34	0.33	0.34	0.30	0.33
						TTL/(f*fno)	0.86	0.83	0.81	0.85	0.91
f/f123	1.08	1.02	1.12	1.06	1.13
						(f3-f4)/(f1-f4)	0.83	0.92	0.85	0.83	0.69
\|R5/R7\|	1.01	1.10	1.01	0.99	0.91
						\|R6/R8\|	1.23	1.28	1.16	1.14	1.13
(R7+R8)/(R7-R8)	4.39	4.97	4.20	4.96	4.07
						(CT1+CT2+T12)/TD	0.53	0.54	0.53	0.51	0.53
BFL/TTL	0.31	0.31	0.32	0.35	0.31
						T34/∑AT	0.05	0.05	0.05	0.05	0.07
(CT3+CT4)/∑CT	0.50	0.49	0.50	0.54	0.45
						CT2/ET2	0.91	1.01	0.99	0.93	0.84
SAG21/SAG31	0.47	0.54	0.55	0.59	0.47

Table 11 table 12 gives effective focal lengths f of the optical imaging lenses of example one to example five, and effective focal lengths f1 to f4 of the respective lenses.

Example parameters	1	2	3	4	5
						f1(mm)	4.7	4.2	3.8	4.6	5.9
f2(mm)	10.8	21.4	-1066.7	27.3	7.0
						f3(mm)	3.0	3.3	2.6	2.7	2.7
f4(mm)	-5.1	-6.4	-4.5	-6.0	-4.6
						f123(mm)	2.39	2.52	2.29	2.28	2.22
f(mm)	2.59	2.58	2.56	2.41	2.50
						TTL(mm)	4.15	4.05	3.95	3.95	4.26
ImgH(mm)	2.07	2.09	2.00	2.05	2.04
						Semi-FOV(°)	39.34	39.65	37.50	40.97	39.72
SR(mm)	0.69	0.68	0.68	0.62	0.67

TABLE 12

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 to an image side of the optical imaging lens:

a first lens;

a second lens;

the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface;

a fourth lens having a negative optical power;

the maximum effective radius DT11 of the object side surface of the first lens and the aperture value fno of the optical imaging lens satisfy the following condition: 0.3mm < DT11/fno <0.5 mm;

the maximum effective radius DT11 of the object side surface of the first lens and the distance SD between the diaphragm of the optical imaging lens and the image side surface of the fourth lens on the optical axis of the optical imaging lens satisfy that: DT11/SD < 0.3.

2. The optical imaging lens of claim 1, wherein the maximum effective radius SR of the diaphragm of the optical imaging lens satisfies: SR <0.7 mm.

3. The optical imaging lens of claim 1, wherein the maximum effective radius DT11 of the object side surface of the first lens and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens satisfy: DT11/ImgH < 0.4.

4. The optical imaging lens of claim 1, wherein a maximum effective radius DT41 of the object side surface of the fourth lens and a maximum effective radius DT11 of the object side surface of the first lens satisfy: 2< DT41/DT11< 3.

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 image plane of the optical imaging lens, an effective focal length f of the optical imaging lens, and an aperture value fno of the optical imaging lens satisfy 0.8< TTL/(f x fno) <1.

6. The optical imaging lens of claim 1, wherein an effective focal length f of the optical imaging lens, a combined focal length f123 of the first lens, the second lens and the third lens satisfy: 1< f/f123< 1.2.

7. The optical imaging lens of claim 1, wherein the effective focal length f1 of the first lens, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy: 0.6< (f3-f4)/(f1-f4) <1.

8. The optical imaging lens of claim 1, wherein a filter is disposed between the fourth lens and the imaging surface of the optical imaging lens, and a band pass wavelength of the filter is greater than or equal to 900nm and less than or equal to 1000 nm.

9. The optical imaging lens of claim 1, wherein a radius of curvature R5 of the object-side surface of the third lens and a radius of curvature R7 of the object-side surface of the fourth lens satisfy: 0.9< | R5/R7| < 1.2.

10. The optical imaging lens of claim 1, wherein a radius of curvature R6 of the image-side surface of the third lens and a radius of curvature R8 of the image-side surface of the fourth lens satisfy: 1< | R6/R8| < 1.3.

11. The optical imaging lens of claim 1, wherein a radius of curvature R7 of the object-side surface of the fourth lens and a radius of curvature R8 of the image-side surface of the fourth lens satisfy: 4< (R7+ R8)/(R7-R8) < 5.

12. The optical imaging lens according to claim 1, wherein a stop is provided between the first lens and a subject.

13. The optical imaging lens of claim 1, wherein the first lens has a positive optical power.

14. The optical imaging lens of claim 1, wherein a center thickness CT1 of the first lens on an optical axis of the optical imaging lens, a center thickness CT2 of the second lens on the optical axis, an air interval T12 of the first lens and the second lens on the optical axis, and an on-axis distance TD from an object side surface of the first lens to an image side surface of the fourth lens satisfy: 0.5< (CT1+ CT2+ T12)/TD < 0.6.

15. The optical imaging lens of claim 1, wherein a distance BFL between an image side surface of the fourth lens element and an imaging surface of the optical imaging lens on an optical axis of the optical imaging lens and an on-axis distance TTL between an object side surface of the first lens element and the imaging surface satisfy: 0.3< BFL/TTL < 0.5.

16. The optical imaging lens according to claim 1, wherein a sum Σ AT of air intervals on an optical axis of the optical imaging lens between any adjacent two lenses having optical powers of the first lens to the fourth lens, and an air interval T34 on the optical axis of the third lens and the fourth lens satisfy: T34/SIGMA AT < 0.1.

17. The optical imaging lens according to claim 1, wherein a center thickness CT3 of the third lens on an optical axis of the optical imaging lens, a center thickness CT4 of the fourth lens on the optical axis, and a sum Σ CT of center thicknesses of the first lens to the fourth lens on the optical axis satisfy: 0.4< (CT3+ CT 4)/. Sigma CT < 0.6.

18. The optical imaging lens of claim 1, wherein the second lens satisfies, between a center thickness CT2 on an optical axis of the optical imaging lens and an edge thickness ET2 of the second lens: 0.8< CT2/ET2< 1.1.

19. The optical imaging lens of claim 1, wherein an on-axis distance SAG22 from an intersection point of an object-side surface of the second lens and an 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 from an intersection point of an 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: 0.4< SAG21/SAG31< 0.6.

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

a first lens;

a second lens;

a fourth lens having a negative optical power;

an on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens, and an effective focal length f of the optical imaging lens and an aperture value fno of the optical imaging lens satisfy 0.8< TTL/(f × fno) <1.

21. The optical imaging lens of claim 20, wherein the maximum effective radius SR of the diaphragm of the optical imaging lens satisfies: SR <0.7 mm.

22. The optical imaging lens of claim 20, wherein the maximum effective radius DT41 of the object side surface of the fourth lens and the maximum effective radius DT11 of the object side surface of the first lens satisfy: 2< DT41/DT11< 3.

23. The optical imaging lens of claim 20, wherein an effective focal length f of the optical imaging lens, a combined focal length f123 of the first lens, the second lens and the third lens satisfy: 1< f/f123< 1.2.

24. The optical imaging lens of claim 20, wherein the effective focal length f1 of the first lens, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy: 0.6< (f3-f4)/(f1-f4) <1.

25. The optical imaging lens of claim 20, wherein a filter is disposed between the fourth lens and the imaging surface of the optical imaging lens, and a band pass wavelength of the filter is greater than or equal to 900nm and less than or equal to 1000 nm.

26. The optical imaging lens of claim 20, wherein a radius of curvature R5 of the object-side surface of the third lens and a radius of curvature R7 of the object-side surface of the fourth lens satisfy: 0.9< | R5/R7| < 1.2.

27. The optical imaging lens of claim 20, wherein a radius of curvature R6 of the image-side surface of the third lens and a radius of curvature R8 of the image-side surface of the fourth lens satisfy: 1< | R6/R8| < 1.3.

28. The optical imaging lens of claim 20, wherein a radius of curvature R7 of the object-side surface of the fourth lens and a radius of curvature R8 of the image-side surface of the fourth lens satisfy: 4< (R7+ R8)/(R7-R8) < 5.

29. The optical imaging lens of claim 20, wherein a stop is disposed between the first lens and a subject.

30. The optical imaging lens of claim 20, wherein the first lens has a positive optical power.

31. The optical imaging lens of claim 20, wherein a center thickness CT1 of the first lens on an optical axis of the optical imaging lens, a center thickness CT2 of the second lens on the optical axis, an air space T12 of the first lens and the second lens on the optical axis, and an on-axis distance TD from an object side surface of the first lens to an image side surface of the fourth lens satisfy: 0.5< (CT1+ CT2+ T12)/TD < 0.6.

32. The optical imaging lens of claim 20, wherein a distance BFL between an image side surface of the fourth lens element and an imaging surface of the optical imaging lens on an optical axis of the optical imaging lens and an on-axis distance TTL between an object side surface of the first lens element and the imaging surface satisfy: 0.3< BFL/TTL < 0.5.

33. The optical imaging lens according to claim 20, wherein a sum Σ AT of air intervals on an optical axis of the optical imaging lens between any adjacent two lenses having optical powers of the first lens to the fourth lens, and an air interval T34 on the optical axis of the third lens and the fourth lens satisfy: T34/SIGMA AT < 0.1.

34. The optical imaging lens of claim 20, wherein a center thickness CT3 of the third lens on an optical axis of the optical imaging lens, a center thickness CT4 of the fourth lens on the optical axis, and a sum Σ CT of center thicknesses of the first to fourth lenses on the optical axis satisfy: 0.4< (CT3+ CT 4)/. Sigma CT < 0.6.

35. The optical imaging lens of claim 20 wherein the second lens satisfies, between a center thickness CT2 on an optical axis of the optical imaging lens and an edge thickness ET2 of the second lens: 0.8< CT2/ET2< 1.1.

36. The optical imaging lens of claim 20, wherein an on-axis distance SAG22 from an intersection point of an object-side surface of the second lens and an 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 from an intersection point of an 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: 0.4< SAG21/SAG31< 0.6.