CN113589484A

CN113589484A - Optical imaging lens

Info

Publication number: CN113589484A
Application number: CN202110887221.5A
Authority: CN
Inventors: 龚停停; 缪力力; 宋立通; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2021-11-02
Anticipated expiration: 2041-08-03
Also published as: CN113589484B

Abstract

The invention provides an optical imaging lens. The optical imaging lens sequentially comprises the following components from the object side of the optical imaging lens to the image side of the optical imaging lens: the image side surface of the first lens is a concave surface; a second lens having a positive refractive power; a third lens element, an object-side surface of the third lens element being convex; a fourth lens having a positive refractive power; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the on-axis distance TTL from the object side surface of the first lens to the imaging surface, half of diagonal length imgH of an effective pixel area on the imaging surface and the aperture value Fno of the optical imaging lens meet the following conditions: 1< TTL/ImgH/Fno < 1.5; the maximum half field angle Semi-FOV of the optical imaging lens meets the following requirements: 60 ° < Semi-FOV <70 °. The invention solves the problem that the optical imaging lens in the prior art cannot be miniaturized and has small distortion.

Description

Optical imaging lens

Technical Field

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

Background

In recent years, with the miniaturization of image sensors and the increase in the number of pixels, optical imaging lenses used in combination with the image sensors are also being more highly demanded. For example, a common optical imaging lens applied to image pickup, unmanned aerial vehicles, security and the like needs to have a larger field angle to acquire as much object information as possible, and needs to have a smaller size and a higher imaging definition. In addition, in order to obtain more realistic physical information, some imaging devices usually perform secondary processing on an image formed by an optical imaging lens through image software, wherein the distortion size and shape of the optical imaging lens are important factors influencing the processing effect.

That is, the optical imaging lens in the prior art has a problem that miniaturization and small distortion cannot be compatible.

Disclosure of Invention

The invention mainly aims to provide an optical imaging lens, which solves the problem that the optical imaging lens in the prior art cannot be miniaturized and has small distortion.

In order to achieve the above object, according to an 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: the image side surface of the first lens is a concave surface; a second lens having a positive refractive power; a third lens element, an object-side surface of the third lens element being convex; a fourth lens having a positive refractive power; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the on-axis distance TTL from the object side surface of the first lens to the imaging surface, half of diagonal length imgH of an effective pixel area on the imaging surface and the aperture value Fno of the optical imaging lens meet the following conditions: 1< TTL/ImgH/Fno < 1.5; the maximum half field angle Semi-FOV of the optical imaging lens meets the following requirements: 60 ° < Semi-FOV <70 °.

Further, the effective focal length f of the optical imaging lens, the maximum half field angle Semi-FOV 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 fifth lens satisfy: 0.5< f tan (Semi-FOV)/TD < 0.6.

Further, an on-axis distance TTL from the object-side surface of the first lens element to the image plane and an on-axis distance TD from the object-side surface of the first lens element to the image-side surface of the fifth lens element satisfy: 1.2< TTL/TD < 1.3.

Further, the effective focal length f of the optical imaging lens and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy: 0.5< f/ImgH < 0.7.

Further, the distance SD from the diaphragm to the image side surface of the fifth lens and the on-axis distance TD from the object side surface of the first lens to the image side surface of the fifth lens satisfy: 0.6< SD/TD < 0.7.

Further, the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens and the effective focal length f3 of the third lens satisfy the following conditions: i f1/f-f3/f < 0.6.

Further, the effective focal length f of the optical imaging lens and the effective focal length f2 of the second lens satisfy: 0.8< f2/f < 1.1.

Further, the effective focal length f2 of the second lens, the radius of curvature R3 of the object-side surface of the second lens, and the radius of curvature R4 of the image-side surface of the second lens satisfy: 0.5< f2/(R3+ R4) < 0.7.

Further, a radius of curvature R9 of the object-side surface of the fifth lens and a radius of curvature R10 of the image-side surface of the fifth lens satisfy: 0< (R9-R10)/(R9+ R10) < 0.3.

Further, an air interval T12 on the optical axis of the first lens and the second lens and a sum Σ AT of air intervals on the optical axis between adjacent two lenses of the first lens to the fifth lens satisfy: 0.7< T12/∑ AT.

Further, the thickness CT1 of the first lens on the optical axis, the thickness CT2 of the second lens on the optical axis, the thickness CT3 of the third lens on the optical axis, and the thickness CT5 of the fifth lens on the optical axis satisfy: i CT1-CT 2I/I CT3-CT 5I < 0.5.

Further, the thickness CT1 of the first lens on the optical axis and the thickness CT2 of the second lens on the optical axis satisfy: 0.9< CT1/CT2< 1.1.

Further, a sum Σ AT of air intervals on the optical axis between adjacent two lenses of the first to fifth lenses and an on-axis distance BFL from the image-side surface of the fifth lens to the imaging surface satisfy: 0.7< ∑ AT/BFL < 0.9.

Further, the thickness CT1 of the first lens on the optical axis and the edge thickness ET1 of the first lens satisfy: 1< CT1/ET1< 1.5.

Further, the edge thickness ET2 of the second lens, the edge thickness ET3 of the third lens and the edge thickness ET4 of the fourth lens satisfy: 0.3< ET4/(ET2+ ET3) < 0.4.

Further, the abbe number V3 of the third lens, the abbe number V4 of the fourth lens and the abbe number V5 of the fifth lens satisfy: v3+ V5< V4.

Further, the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT52 of the image side surface of the fifth lens satisfy: 0.9< DT11/DT52< 1.1.

Further, a minimum value DT among maximum effective radii of the first lens to the fifth lens_MINAnd a maximum value DT of maximum effective radii of the first to fifth lenses_MAXSatisfies the following conditions: 0.2<DT_MIN/DT_MAX<0.5。

Further, an on-axis distance SAG21 between an intersection point of the object-side surface of the second lens and the optical axis to an effective radius vertex of the object-side surface of the second lens, an on-axis distance SAG22 between an intersection point of the image-side surface of the second lens and the optical axis to an effective radius vertex of the image-side surface of the second lens, 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, and an on-axis distance SAG32 between an intersection point of the image-side surface of the third lens and the optical axis to an effective radius vertex of the image-side surface of the third lens satisfy: 1< (SAG22-SAG31)/(SAG21+ SAG32) < 1.5.

Further, an on-axis distance SAG12 between an intersection point of the image-side surface of the first lens and the optical axis to an effective radius vertex of the image-side surface of the first lens, an on-axis distance SAG22 between an intersection point of the image-side surface of the second lens and the optical axis to an effective radius vertex of the image-side surface of the second lens, and an on-axis distance SAG42 between an intersection point of the image-side surface of the fourth lens and the optical axis to an effective radius vertex of the image-side surface of the fourth lens satisfy: 0.8< SAG42/(SAG12+ SAG22) <1.

Further, the distorted DIST of the optical imaging lens at 0.8 field of view_0.8FSatisfies the following conditions: | DIST_0.8F|<0.5％。

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: the image side surface of the first lens is a concave surface; a second lens having a positive refractive power; a third lens element, an object-side surface of the third lens element being convex; a fourth lens having a positive refractive power; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the on-axis distance TTL from the object side surface of the first lens to the imaging surface, half of diagonal length imgH of an effective pixel area on the imaging surface and the aperture value Fno of the optical imaging lens meet the following conditions: 1< TTL/ImgH/Fno < 1.5; the effective focal length f of the optical imaging lens, the maximum half field angle Semi-FOV 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 fifth lens satisfy the following conditions: 0.5< f tan (Semi-FOV)/TD < 0.6.

Further, the maximum half field angle Semi-FOV of the optical imaging lens satisfies: 60 ° < Semi-FOV <70 °; an on-axis distance TTL from the object side surface of the first lens to the imaging surface and an on-axis distance TD from the object side surface of the first lens to the image side surface of the fifth lens satisfy: 1.2< TTL/TD < 1.3.

By applying the technical scheme of the invention, the optical imaging lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from the object side to the image side of the optical imaging lens, wherein the image side surface of the first lens is a concave surface; the second lens has positive focal power; the object side surface of the third lens is a convex surface; the fourth lens has positive focal power; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the on-axis distance TTL from the object side surface of the first lens to the imaging surface, half of diagonal length imgH of an effective pixel area on the imaging surface and the aperture value Fno of the optical imaging lens meet the following conditions: 1< TTL/ImgH/Fno < 1.5; the maximum half field angle Semi-FOV of the optical imaging lens meets the following requirements: 60 ° < Semi-FOV <70 °.

Through the reasonable distribution of the focal power and the surface type of each lens, various aberrations of the system can be effectively balanced, so that the imaging quality is improved. The image side surface of the first lens is controlled to be a concave surface, so that light rays can be better converged, and the system can meet the requirement of a large field angle. By controlling the second lens and the fourth lens to have positive focal power, the distortion and curvature of field of the system can be corrected, and the compactness of the system can be ensured. The object side surface of the fifth lens and the image side surface of the fifth lens are controlled to be a convex surface and a concave surface respectively, so that ghost images of the system can be effectively weakened, and the matching between the emergent ray angle of the optical imaging lens and the chip is ensured.

In addition, by controlling the relationship between the on-axis distance TTL from the object side surface of the first lens element to the imaging surface, the half ImgH of the diagonal length of the effective pixel area on the imaging surface, and the aperture value Fno of the optical imaging lens, the system can be ensured to have a larger imaging surface and more brightness, and the optical imaging lens can be miniaturized as much as possible. By restricting the maximum half field angle Semi-FOV of the optical imaging lens, the information in a larger field range of an object side can be received. The optical imaging lens has the characteristics of wide angle, small distortion and miniaturization.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. 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 an on-axis chromatic aberration curve, a magnification chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens in 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 an on-axis chromatic aberration curve, a magnification chromatic aberration curve, an astigmatism curve, and a distortion curve 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 on-axis chromatic aberration curve, a magnification chromatic aberration curve, an astigmatism curve, and a distortion 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 show an on-axis chromatic aberration curve, a magnification chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens in fig. 16, respectively;

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 on-axis chromatic aberration curve, a magnification chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens in fig. 21, respectively;

fig. 26 is a schematic structural view showing an optical imaging lens of example six of the present invention;

fig. 27 to 30 show an on-axis chromatic aberration curve, a magnification chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens in fig. 26, 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, fifth lens; s9, the object side surface of the fifth lens; s10, an image side surface of the fifth lens element; e6, optical filters; s11, the object side surface of the optical filter; s12, the image side surface of the optical filter; and S13, 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 invention.

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 invention provides an optical imaging lens, aiming at solving the problem that the miniaturization and small distortion of the optical imaging lens in the prior art can not be considered at the same time.

Example one

As shown in fig. 1 to 30, 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, a fourth lens element and a fifth lens element, wherein an image-side surface of the first lens element is a concave surface; the second lens has positive focal power; the object side surface of the third lens is a convex surface; the fourth lens has positive focal power; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the on-axis distance TTL from the object side surface of the first lens to the imaging surface, half of diagonal length imgH of an effective pixel area on the imaging surface and the aperture value Fno of the optical imaging lens meet the following conditions: 1< TTL/ImgH/Fno < 1.5; the maximum half field angle Semi-FOV of the optical imaging lens meets the following requirements: 60 ° < Semi-FOV <70 °.

In the embodiment, the effective focal length f of the optical imaging lens, the maximum half field angle Semi-FOV 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 fifth lens satisfy: 0.5< f tan (Semi-FOV)/TD < 0.6. By limiting f tan (Semi-FOV)/TD within a reasonable range, the optical size of the system can be reduced as much as possible while the field angle of the system is ensured, and the miniaturization characteristic of the optical imaging lens is met.

In this embodiment, an on-axis distance TTL from the object-side surface of the first lens element to the image plane and an on-axis distance TD from the object-side surface of the first lens element to the image-side surface of the fifth lens element satisfy: 1.2< TTL/TD < 1.3. By controlling the ratio of the on-axis distance TTL from the object side surface of the first lens to the imaging surface to the on-axis distance TD from the object side surface of the first lens to the image side surface of the fifth lens to be within a reasonable range, a sufficient distance can be left between the image side surface of the fifth lens and the imaging surface in the system, the reasonability and the machinability of structural arrangement are ensured, and in addition, the control of the total optical length of the system is facilitated.

In the embodiment, the effective focal length f of the optical imaging lens and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy: 0.5< f/ImgH < 0.7. By controlling the ratio of the effective focal length f of the optical imaging lens to the half of the diagonal length ImgH of the effective pixel area on the imaging surface within a reasonable range, the size of the object space field angle of the optical imaging lens can be effectively controlled. Preferably, 0.5< f/ImgH.ltoreq.0.6.

In this embodiment, a distance SD from the stop to the image-side surface of the fifth lens and an on-axis distance TD from the object-side surface of the first lens to the image-side surface of the fifth lens satisfy: 0.6< SD/TD < 0.7. By controlling the ratio of the distance SD from the diaphragm to the image side surface of the fifth lens to the on-axis distance TD from the object side surface of the first lens to the image side surface of the fifth lens within a reasonable range, the spherical aberration and astigmatism of the system can be effectively corrected, and the imaging definition of the system is improved.

In the present embodiment, the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens, and the effective focal length f3 of the third lens satisfy: i f1/f-f3/f < 0.6. Satisfying the conditional expression is beneficial to controlling the contribution of the first lens and the third lens to the effective focal length of the whole system and balancing the on-axis aberration and the off-axis aberration of the system. Preferably, 0.1< | f1/f-f3/f | < 0.6.

In the present embodiment, the effective focal length f of the optical imaging lens and the effective focal length f2 of the second lens satisfy: 0.8< f2/f < 1.1. By controlling the ratio of the effective focal length f of the optical imaging lens to the effective focal length f2 of the second lens within a reasonable range, contribution of the second lens behind the diaphragm to the focal length of the whole optical system is favorably controlled, and curvature of field and coma of the system are corrected.

In the present embodiment, the effective focal length f2 of the second lens, the radius of curvature R3 of the object-side surface of the second lens, and the radius of curvature R4 of the image-side surface of the second lens satisfy: 0.5< f2/(R3+ R4) < 0.7. The method satisfies the conditional expression, can control the effective focal length of the second lens, simultaneously reduces the curvatures of two surfaces as far as possible, improves the processing formability of the lens, and is beneficial to reducing the overall sensitivity of the system.

In the present embodiment, a radius of curvature R9 of the object-side surface of the fifth lens and a radius of curvature R10 of the image-side surface of the fifth lens satisfy: 0< (R9-R10)/(R9+ R10) < 0.3. By controlling the conditional expression within a reasonable range, the field curvature and distortion of the system can be corrected, and the fifth lens can be machined and formed. Preferably, 0< (R9-R10)/(R9+ R10) ≦ 0.2.

In the present embodiment, an air interval T12 on the optical axis of the first lens and the second lens and a sum Σ AT of air intervals on the optical axis between adjacent two lenses of the first lens to the fifth lens satisfy: 0.7< T12/∑ AT. By controlling the T12/sigma AT within a reasonable range, not only can the chromatic aberration and astigmatism of the system be effectively reduced, but also the optical overall length of the optical imaging system can be compressed. Preferably, 0.7< T12/∑ AT < 0.9.

In the present embodiment, the thickness CT1 of the first lens on the optical axis, the thickness CT2 of the second lens on the optical axis, the thickness CT3 of the third lens on the optical axis, and the thickness CT5 of the fifth lens on the optical axis satisfy: i CT1-CT 2I/I CT3-CT 5I < 0.5. By controlling the | CT1-CT2|/| CT3-CT5| within a reasonable range, the thickness of each lens on the optical axis can be effectively restrained, and the forming and assembling of each lens are facilitated.

In the present embodiment, the thickness CT1 of the first lens on the optical axis and the thickness CT2 of the second lens on the optical axis satisfy: 0.9< CT1/CT2< 1.1. The ratio of the thickness CT1 of the first lens on the optical axis to the thickness CT2 of the second lens on the optical axis is controlled within a reasonable range, so that on one hand, the on-axis aberration of the system is balanced, the imaging quality of the system is improved, on the other hand, the system is favorable for being better assembled, and the production yield is improved.

In the present embodiment, a sum Σ AT of air intervals on the optical axis between adjacent two lenses of the first to fifth lenses and an on-axis distance BFL from the image-side surface of the fifth lens to the imaging surface satisfy: 0.7< ∑ AT/BFL < 0.9. By controlling the conditional expression within a reasonable range, the size of the system can be further reduced on the basis of ensuring the reasonable arrangement of the lenses in space, and the characteristic of system miniaturization is embodied.

In the present embodiment, the thickness CT1 of the first lens on the optical axis and the edge thickness ET1 of the first lens satisfy: 1< CT1/ET1< 1.5. The processing and forming of the first lens are facilitated by controlling the ratio of the thickness CT1 of the first lens on the optical axis to the edge thickness ET1 of the first lens. Preferably, 1.1< CT1/ET1< 1.4.

In the present embodiment, the edge thickness ET2 of the second lens, the edge thickness ET3 of the third lens, and the edge thickness ET4 of the fourth lens satisfy: 0.3< ET4/(ET2+ ET3) < 0.4. By reasonably constraining the conditional expression, the reasonable distribution of the second lens, the third lens and the fourth lens in the space can be effectively controlled, the system is ensured to have better assemblage property, and the ghost image energy of the system is favorably weakened.

In the present embodiment, the abbe number V3 of the third lens, the abbe number V4 of the fourth lens, and the abbe number V5 of the fifth lens satisfy: v3+ V5< V4. By controlling the sum of the abbe number V3 of the third lens and the abbe number V5 of the fifth lens to be smaller than the abbe number V4 of the fourth lens, chromatic aberration of the optical imaging lens can be effectively corrected.

In the present embodiment, the maximum effective radius DT11 of the object-side surface of the first lens and the maximum effective radius DT52 of the image-side surface of the fifth lens satisfy: 0.9< DT11/DT52< 1.1. By controlling the ratio of the maximum effective radius DT11 of the object side surface of the first lens to the maximum effective radius DT52 of the image side surface of the fifth lens, the spherical aberration and chromatic aberration of the system can be effectively corrected, and the spatial arrangement among the lenses is facilitated.

In the present embodiment, the minimum value DT among the maximum effective radii of the first lens to the fifth lens_MINAnd a maximum value DT of maximum effective radii of the first to fifth lenses_MAXSatisfies the following conditions: 0.2<DT_MIN/DT_MAX<0.5. By constraining DT_MIN/DT_MAXWithin a reasonable range, the incidence angle of marginal rays on each lens can be effectively restrained, the marginal field aberration can be corrected, and the reduction of the energy of ghost images between the lenses is facilitated. Preferably, 0.2<DT_MIN/DT_MAX<0.4。

In the present embodiment, the on-axis distance SAG21 between the intersection of the object-side surface of the second lens and the optical axis to the effective radius vertex of the object-side surface of the second lens, the on-axis distance SAG22 between the intersection of the image-side surface of the second lens and the optical axis to the effective radius vertex of the image-side surface of the second lens, the on-axis distance SAG31 between the intersection of the object-side surface of the third lens and the optical axis to the effective radius vertex of the object-side surface of the third lens, and the on-axis distance SAG32 between the intersection of the image-side surface of the third lens and the optical axis to the effective radius vertex of the image-side surface of the third lens satisfy: 1< (SAG22-SAG31)/(SAG21+ SAG32) < 1.5. Satisfying the conditional expression is not only beneficial to controlling the curvature of the second lens and the third lens and reducing the overall sensitivity of the system, but also beneficial to balancing various aberrations of the system. Preferably, 1.1< (SAG22-SAG31)/(SAG21+ SAG32) < 1.4.

In the present embodiment, the on-axis distance SAG12 between the intersection point of the image-side surface of the first lens and the optical axis to the effective radius vertex of the image-side surface of the first lens, the on-axis distance SAG22 between the intersection point of the image-side surface of the second lens and the optical axis to the effective radius vertex of the image-side surface of the second lens, and the on-axis distance SAG42 between the intersection point of the image-side surface of the fourth lens and the optical axis to the effective radius vertex of the image-side surface of the fourth lens satisfy: 0.8< SAG42/(SAG12+ SAG22) <1. Satisfying the conditional expression is beneficial to controlling the shape of each lens and improving the forming and assembling yield of the lens on one hand, and is beneficial to weakening ghost images generated between the surfaces of the lens and the lens on the other hand.

In the present embodiment, the distorted DIST of the optical imaging lens at 0.8 field of view_0.8FSatisfies the following conditions: | DIST_0.8F|<0.5 percent. DIST (distortion disct) at 0.8 visual field by controlling optical imaging lens_0.8FThe method is favorable for controlling the shape and the size of the system distortion and ensures the characteristic of small system distortion. Preferably, | DIST_0.8F|<0.4％。

Example two

As shown in fig. 1 to 30, 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, a fourth lens element and a fifth lens element, wherein an image-side surface of the first lens element is a concave surface; the second lens has positive focal power; the object side surface of the third lens is a convex surface; the fourth lens has positive focal power; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the on-axis distance TTL from the object side surface of the first lens to the imaging surface, half of diagonal length imgH of an effective pixel area on the imaging surface and the aperture value Fno of the optical imaging lens meet the following conditions: 1< TTL/ImgH/Fno < 1.5; the effective focal length f of the optical imaging lens, the maximum half field angle Semi-FOV 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 fifth lens satisfy the following conditions: 0.5< f tan (Semi-FOV)/TD < 0.6.

In addition, by controlling the relationship between the on-axis distance TTL from the object side surface of the first lens element to the imaging surface, the half ImgH of the diagonal length of the effective pixel area on the imaging surface, and the aperture value Fno of the optical imaging lens, the system can be ensured to have a larger imaging surface and more brightness, and the optical imaging lens can be miniaturized as much as possible. By limiting f tan (Semi-FOV)/TD within a reasonable range, the optical size of the system can be reduced as much as possible while the field angle of the system is ensured, and the miniaturization characteristic of the optical imaging lens is met.

In the present embodiment, the maximum half field angle Semi-FOV of the optical imaging lens satisfies: 60 ° < Semi-FOV <70 °. By restricting the maximum half field angle Semi-FOV of the optical imaging lens, the information in a larger field range of an object side can be received. The optical imaging lens has the characteristics of wide angle, small distortion and miniaturization.

An on-axis distance TTL from the object side surface of the first lens to the imaging surface and an on-axis distance TD from the object side surface of the first lens to the image side surface of the fifth lens satisfy: 1.2< TTL/TD < 1.3. By controlling the ratio of the on-axis distance TTL from the object side surface of the first lens to the imaging surface to the on-axis distance TD from the object side surface of the first lens to the image side surface of the fifth lens to be within a reasonable range, a sufficient distance can be left between the image side surface of the fifth lens and the imaging surface in the system, the reasonability and the machinability of structural arrangement are ensured, and in addition, the control of the total optical length of the system is facilitated.

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 above-mentioned five lenses. 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 the advantages of wide angle, small distortion, ultra-thinness and good imaging quality, and 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 five lenses are exemplified in the embodiment, the optical imaging lens is not limited to include five 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 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: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.

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 and the image-side surface S4 of the second lens element are convex. The third lens element E3 has negative power, and the object-side surface S5 of the third lens element is convex and the image-side surface S6 of the third lens element is concave. The fourth lens element E4 has positive refractive power, and the object-side surface S7 of the fourth lens element is concave, and the image-side surface S8 of the fourth lens element is convex. The fifth lens element E5 has negative power, and the object-side surface S9 of the fifth lens element is convex and the image-side surface S10 of the fifth lens element is concave. The filter E6 has an object side surface S11 of the filter and an image side surface S12 of the filter. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.

In this example, the total effective focal length f of the optical imaging lens is 1.20mm, the maximum half field angle Semi-FOV of the optical imaging lens is 60.25 °, the total system length TTL of the optical imaging lens is 5.10mm, and the image height ImgH is 2.00 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, A22, A24, A26, A28, A30, which can be used for each of the aspherical mirrors S1-S10 in example one.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

2.0162E-01

-1.3085E-01

2.2875E-02

1.0509E-01

-1.3603E-01

4.0174E-02

7.3921E-02

S2

6.8800E-01

1.6237E+00

-7.2943E+01

1.6352E+03

-2.4354E+04

2.4962E+05

-1.7944E+06

S3

-1.0962E-01

1.3938E+00

-1.6640E+01

-4.7174E+02

1.7612E+04

-2.6958E+05

2.4819E+06

S4

2.0944E-01

-9.7695E+00

2.3264E+02

-2.9231E+03

2.3768E+04

-1.3527E+05

5.5801E+05

S5

-8.5441E-01

-5.0544E+00

1.0807E+02

-9.8658E+02

5.7928E+03

-2.3488E+04

6.6887E+04

S6

5.4384E-01

-8.4351E+00

6.1066E+01

-3.0062E+02

1.0794E+03

-2.8809E+03

5.7428E+03

S7

1.4726E+00

-5.9798E+00

1.8124E+01

-4.1507E+01

7.8972E+01

-1.4778E+02

2.8344E+02

S8

-4.6854E-01

7.3880E+00

-5.5360E+01

2.5435E+02

-7.9489E+02

1.7701E+03

-2.8732E+03

S9

-1.2664E+00

8.4229E+00

-4.9597E+01

1.8873E+02

-4.9230E+02

9.1632E+02

-1.2438E+03

S10

8.0682E-01

-3.8412E+00

9.1887E+00

-1.4045E+01

1.3535E+01

-6.7188E+00

-1.0581E+00

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

-1.0701E-01

7.2249E-02

-3.0040E-02

8.0752E-03

-1.3736E-03

1.3488E-04

-5.8380E-06

S2

9.1687E+06

-3.3440E+07

8.6384E+07

-1.5431E+08

1.8124E+08

-1.2587E+08

3.9167E+07

S3

-1.5182E+07

6.4060E+07

-1.8796E+08

3.7764E+08

-4.9636E+08

3.8501E+08

-1.3375E+08

S4

-1.6930E+06

3.7811E+06

-6.1413E+06

7.0520E+06

-5.4224E+06

2.5031E+06

-5.2414E+05

S5

-1.3259E+05

1.7517E+05

-1.3482E+05

2.5841E+04

5.2929E+04

-4.8291E+04

1.3470E+04

S6

-8.5323E+03

9.3699E+03

-7.4755E+03

4.1998E+03

-1.5706E+03

3.4995E+02

-3.5042E+01

S7

-4.7554E+02

6.0648E+02

-5.5125E+02

3.4346E+02

-1.3921E+02

3.3063E+01

-3.4927E+00

S8

3.4309E+03

-3.0084E+03

1.9115E+03

-8.5515E+02

2.5511E+02

-4.5497E+01

3.6659E+00

S9

1.2427E+03

-9.1275E+02

4.8663E+02

-1.8308E+02

4.6047E+01

-6.9426E+00

4.7417E-01

S10

4.4722E+00

-3.6366E+00

1.6859E+00

-4.9552E-01

9.1586E-02

-9.7536E-03

4.5775E-04

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 a chromatic aberration of magnification curve of the optical imaging lens of the first example, which represents the deviation of different image heights on the imaging plane after the light passes through the optical imaging lens. Fig. 4 shows astigmatism curves of the optical imaging lens of example one, which represent meridional field curvature and sagittal field curvature. Fig. 5 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 5, the optical imaging lens according to the first example can achieve good imaging quality.

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: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.

In this example, the total effective focal length f of the optical imaging lens is 1.21mm, the maximum half field angle Semi-FOV of the optical imaging lens is 61.28 °, the total system length TTL of the optical imaging lens is 5.10mm, and the image height ImgH is 2.10 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.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

1.9674E-01

-9.3170E-02

-1.2448E-01

4.5848E-01

-7.1001E-01

7.0313E-01

-4.8351E-01

S2

6.7459E-01

2.4344E+00

-9.0940E+01

1.8257E+03

-2.5023E+04

2.4209E+05

-1.6720E+06

S3

-9.7661E-02

4.7188E-01

2.7704E+01

-1.6976E+03

3.8847E+04

-5.1646E+05

4.4875E+06

S4

2.1406E-01

-9.9067E+00

2.3498E+02

-2.9520E+03

2.4027E+04

-1.3694E+05

5.6580E+05

S5

-8.5428E-01

-4.9494E+00

1.0567E+02

-9.6063E+02

5.6351E+03

-2.2950E+04

6.6224E+04

S6

5.4139E-01

-8.3645E+00

5.9916E+01

-2.8992E+02

1.0174E+03

-2.6454E+03

5.1342E+03

S7

1.4642E+00

-5.8555E+00

1.6841E+01

-3.2197E+01

3.1687E+01

1.9175E+01

-1.2880E+02

S8

-4.0934E-01

6.2078E+00

-4.5025E+01

2.0131E+02

-6.1608E+02

1.3506E+03

-2.1672E+03

S9

-1.2045E+00

7.2192E+00

-3.9533E+01

1.4064E+02

-3.4254E+02

5.9298E+02

-7.4451E+02

S10

7.8156E-01

-3.8108E+00

9.8642E+00

-1.7786E+01

2.3349E+01

-2.2564E+01

1.6105E+01

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

2.3683E-01

-8.2786E-02

2.0325E-02

-3.3754E-03

3.5225E-04

-1.9822E-05

3.9889E-07

S2

8.3001E+06

-2.9617E+07

7.5202E+07

-1.3248E+08

1.5384E+08

-1.0585E+08

3.2692E+07

S3

-2.6805E+07

1.1240E+08

-3.3114E+08

6.7228E+08

-8.9662E+08

7.0763E+08

-2.5058E+08

S4

-1.7198E+06

3.8492E+06

-6.2681E+06

7.2200E+06

-5.5722E+06

2.5835E+06

-5.4366E+05

S5

-1.3513E+05

1.9009E+05

-1.7198E+05

8.0596E+04

3.7125E+03

-2.3249E+04

7.9226E+03

S6

-7.4445E+03

8.0206E+03

-6.3305E+03

3.5596E+03

-1.3527E+03

3.1210E+02

-3.3106E+01

S7

2.4280E+02

-2.8030E+02

2.1904E+02

-1.1675E+02

4.0769E+01

-8.4124E+00

7.7680E-01

S8

2.5659E+03

-2.2356E+03

1.4135E+03

-6.2985E+02

1.8725E+02

-3.3290E+01

2.6744E+00

S9

6.8383E+02

-4.5892E+02

2.2229E+02

-7.5621E+01

1.7133E+01

-2.3208E+00

1.4222E-01

S10

-8.4842E+00

3.2785E+00

-9.1571E-01

1.7963E-01

-2.3452E-02

1.8287E-03

-6.4406E-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 a chromatic aberration of magnification curve of the optical imaging lens of example two, which represents the deviation of different image heights on the imaging plane after light passes through the optical imaging lens. Fig. 9 shows astigmatism curves of the optical imaging lens of example two, which represent meridional field curvature and sagittal field curvature. Fig. 10 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. 7 to 10, the optical imaging lens according to the second example can achieve good imaging quality.

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: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.

In this example, the total effective focal length f of the optical imaging lens is 1.21mm, the maximum half field angle Semi-FOV of the optical imaging lens is 63.70 °, the total system length TTL of the optical imaging lens is 5.10mm, and the image height ImgH is 2.25 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

1.9542E-01

-8.0867E-02

-1.8119E-01

6.1561E-01

-9.9731E-01

1.0669E+00

-8.1116E-01

S2

6.3725E-01

5.0213E+00

-1.7462E+02

3.3843E+03

-4.3465E+04

3.8859E+05

-2.4778E+06

S3

-7.9204E-02

-7.6014E-01

6.1650E+01

-2.1696E+03

4.2133E+04

-5.2259E+05

4.4165E+06

S4

2.2141E-01

-1.0390E+01

2.5017E+02

-3.2177E+03

2.6875E+04

-1.5703E+05

6.6322E+05

S5

-8.5416E-01

-4.7721E+00

9.8903E+01

-8.3982E+02

4.3411E+03

-1.3826E+04

2.1947E+04

S6

5.5366E-01

-8.7875E+00

6.6080E+01

-3.4151E+02

1.2969E+03

-3.6850E+03

7.8743E+03

S7

1.4620E+00

-5.8690E+00

1.7182E+01

-3.4648E+01

4.1471E+01

-6.6108E+00

-7.9845E+01

S8

-3.9048E-01

5.8290E+00

-4.1804E+01

1.8563E+02

-5.6680E+02

1.2444E+03

-2.0054E+03

S9

-1.1848E+00

6.7807E+00

-3.5773E+01

1.2260E+02

-2.8595E+02

4.6939E+02

-5.5151E+02

S10

7.6040E-01

-3.7532E+00

1.0099E+01

-1.9313E+01

2.7109E+01

-2.8032E+01

2.1369E+01

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

4.4946E-01

-1.8234E-01

5.3594E-02

-1.1104E-02

1.5367E-03

-1.2738E-04

4.7790E-06

S2

1.1410E+07

-3.8012E+07

9.0731E+07

-1.5124E+08

1.6718E+08

-1.1013E+08

3.2735E+07

S3

-2.6261E+07

1.1120E+08

-3.3388E+08

6.9487E+08

-9.5326E+08

7.7517E+08

-2.8294E+08

S4

-2.0528E+06

4.6592E+06

-7.6640E+06

8.8872E+06

-6.8861E+06

3.1987E+06

-6.7341E+05

S5

1.6026E+04

-1.7555E+05

4.5062E+05

-6.4849E+05

5.6219E+05

-2.7504E+05

5.8559E+04

S6

-1.2640E+04

1.5126E+04

-1.3275E+04

8.2860E+03

-3.4803E+03

8.8133E+02

-1.0163E+02

S7

1.7289E+02

-2.0459E+02

1.5809E+02

-8.1727E+01

2.7317E+01

-5.3368E+00

4.6167E-01

S8

2.3891E+03

-2.0973E+03

1.3372E+03

-6.0117E+02

1.8037E+02

-3.2372E+01

2.6259E+00

S9

4.6611E+02

-2.8162E+02

1.1929E+02

-3.4058E+01

6.0829E+00

-5.8248E-01

1.9752E-02

S10

-1.1995E+01

4.9289E+00

-1.4615E+00

3.0398E-01

-4.2032E-02

3.4676E-03

-1.2908E-04

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 a chromatic aberration of magnification curve of the optical imaging lens of example three, which represents the deviation of different image heights on the imaging plane after light passes through the optical imaging lens. Fig. 14 shows astigmatism curves of the optical imaging lens of example three, which represent meridional field curvature and sagittal field curvature. Fig. 15 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. 12 to 15, the optical imaging lens according to the third example can achieve good imaging quality.

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.

As shown in fig. 16, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.

In this example, the total effective focal length f of the optical imaging lens is 1.17mm, the maximum half field angle Semi-FOV of the optical imaging lens is 63.39 °, the total system length TTL of the optical imaging lens is 5.19mm, and the image height ImgH is 2.20 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

2.0567E-01

-1.4657E-01

6.7323E-02

3.4206E-02

-8.7651E-02

6.9876E-02

-2.5272E-02

S2

7.9808E-01

-5.8030E+00

1.3879E+02

-2.3387E+03

2.6907E+04

-2.1634E+05

1.2408E+06

S3

-1.2468E-01

1.8413E+00

-4.7967E+01

6.4716E+02

-4.4724E+03

-3.8741E+03

4.0857E+05

S4

2.0087E-02

-2.7189E+00

1.1712E+02

-1.6956E+03

1.4380E+04

-8.1907E+04

3.3061E+05

S5

-1.1151E+00

6.9715E-01

3.6260E+01

-3.7843E+02

2.1131E+03

-7.3659E+03

1.5720E+04

S6

5.0436E-01

-8.3251E+00

6.4397E+01

-3.3562E+02

1.2606E+03

-3.4920E+03

7.2057E+03

S7

1.5990E+00

-7.6260E+00

2.9687E+01

-9.2022E+01

2.2158E+02

-4.0722E+02

5.6449E+02

S8

-1.8005E-01

3.3932E+00

-2.9221E+01

1.4629E+02

-4.8320E+02

1.1153E+03

-1.8523E+03

S9

-7.5395E-01

3.0828E+00

-2.1375E+01

8.5215E+01

-2.1080E+02

3.4385E+02

-3.7836E+02

S10

1.2955E+00

-7.8460E+00

2.5384E+01

-5.4571E+01

8.1608E+01

-8.6871E+01

6.6799E+01

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

-1.5455E-03

6.2456E-03

-3.2144E-03

8.9368E-04

-1.4780E-04

1.3721E-05

-5.5335E-07

S2

-5.1286E+06

1.5281E+07

-3.2454E+07

4.7817E+07

-4.6337E+07

2.6488E+07

-6.7448E+06

S3

-4.3650E+06

2.6148E+07

-1.0083E+08

2.5561E+08

-4.1295E+08

3.8622E+08

-1.5935E+08

S4

-9.6828E+05

2.0702E+06

-3.2029E+06

3.4940E+06

-2.5491E+06

1.1162E+06

-2.2173E+05

S5

-1.6039E+04

-1.1189E+04

6.4969E+04

-1.0376E+05

8.9200E+04

-4.1593E+04

8.2827E+03

S6

-1.1104E+04

1.2715E+04

-1.0657E+04

6.3466E+03

-2.5422E+03

6.1385E+02

-6.7492E+01

S7

-5.8370E+02

4.4373E+02

-2.4245E+02

9.1749E+01

-2.2551E+01

3.1818E+00

-1.8977E-01

S8

2.2434E+03

-1.9837E+03

1.2665E+03

-5.6825E+02

1.6990E+02

-3.0380E+01

2.4571E+00

S9

2.7839E+02

-1.2914E+02

2.9928E+01

2.3152E+00

-3.6351E+00

9.4693E-01

-8.7595E-02

S10

-3.7373E+01

1.5195E+01

-4.4365E+00

9.0540E-01

-1.2251E-01

9.8686E-03

-3.5804E-04

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 a chromatic aberration of magnification curve of the optical imaging lens of example four, which represents the deviation of different image heights on the imaging plane after light passes through the optical imaging lens. Fig. 19 shows astigmatism curves of the optical imaging lens of example four, which represent meridional field curvature and sagittal field curvature. Fig. 20 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. 17 to 20, the optical imaging lens according to example four can achieve good imaging quality.

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: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.

In this example, the total effective focal length f of the optical imaging lens is 1.16mm, the maximum half field angle Semi-FOV of the optical imaging lens is 63.81 °, the total system length TTL of the optical imaging lens is 5.15mm, and the image height ImgH is 2.20 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. 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 a chromatic aberration of magnification curve of the optical imaging lens of example five, which represents deviations of different image heights on the imaging plane after light passes through the optical imaging lens. Fig. 24 shows astigmatism curves of the optical imaging lens of example five, which represent meridional field curvature and sagittal field curvature. Fig. 25 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. 22 to 25, the optical imaging lens according to example five can achieve good imaging quality.

Example six

As shown in fig. 26 to 30, an optical imaging lens of example six of the present application is described. Fig. 26 shows a schematic diagram of an optical imaging lens structure of example six.

As shown in fig. 26, the optical imaging lens, in order from an object side to an image side, comprises: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.

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 and the image-side surface S4 of the second lens element are convex. The third lens element E3 has negative power, and the object-side surface S5 of the third lens element is convex and the image-side surface S6 of the third lens element is concave. The fourth lens element E4 has positive refractive power, and the object-side surface S7 of the fourth lens element is concave, and the image-side surface S8 of the fourth lens element is convex. The fifth lens element E5 has positive refractive power, and the object-side surface S9 of the fifth lens element is convex and the image-side surface S10 of the fifth lens element is concave. The filter E6 has an object side surface S11 of the filter and an image side surface S12 of the filter. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.

In this example, the total effective focal length f of the optical imaging lens is 1.29mm, the maximum half field angle Semi-FOV of the optical imaging lens is 60.40 °, the total system length TTL of the optical imaging lens is 5.03mm, and the image height ImgH is 2.18 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

2.7287E-01

-2.3779E-01

1.6440E-01

-1.3388E-02

-1.2640E-01

1.6725E-01

-1.1952E-01

S2

6.9272E-01

-1.0666E+00

6.6424E+00

-3.4654E+01

8.6501E+01

3.0593E+02

-3.1934E+03

S3

7.6972E-02

-8.5843E+00

2.8411E+02

-5.7569E+03

7.3015E+04

-5.9296E+05

3.0733E+06

S4

1.6555E-01

-4.1516E+00

8.8595E+01

-8.5383E+02

4.7661E+03

-1.6985E+04

3.9545E+04

S5

-9.7876E-01

-3.4464E+00

8.6538E+01

-7.0488E+02

3.4279E+03

-1.1101E+04

2.4667E+04

S6

7.2498E-01

-1.1830E+01

9.2218E+01

-4.6758E+02

1.6623E+03

-4.2738E+03

8.0447E+03

S7

1.4757E+00

-7.0219E+00

2.0625E+01

-1.2482E+01

-1.7754E+02

8.9546E+02

-2.3902E+03

S8

-1.8359E-01

1.3400E+00

-8.8834E+00

3.3155E+01

-6.9501E+01

6.4058E+01

6.2010E+01

S9

-4.7668E-01

1.0574E+00

-7.2121E+00

2.5319E+01

-5.3931E+01

7.7523E+01

-7.8918E+01

S10

6.7681E-01

-3.2156E+00

7.2104E+00

-1.0193E+01

9.4078E+00

-5.3652E+00

1.3267E+00

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

5.4785E-02

-1.6523E-02

3.1793E-03

-3.5430E-04

1.7402E-05

0.0000E+00

S2

1.1367E+04

-2.1338E+04

2.1013E+04

-8.5241E+03

0.0000E+00

S3

-9.8204E+06

1.7613E+07

-1.3557E+07

0.0000E+00

S4

-5.9136E+04

5.3342E+04

-2.4975E+04

3.9400E+03

0.0000E+00

S5

-3.7454E+04

3.7412E+04

-2.2327E+04

6.0739E+03

0.0000E+00

S6

-1.1084E+04

1.1040E+04

-7.7282E+03

3.5980E+03

-9.9494E+02

1.2065E+02

1.3184E+00

S7

4.2161E+03

-5.1907E+03

4.5027E+03

-2.7045E+03

1.0722E+03

-2.5257E+02

2.6788E+01

S8

-2.9389E+02

4.7132E+02

-4.5061E+02

2.7730E+02

-1.0813E+02

2.4392E+01

-2.4296E+00

S9

5.8073E+01

-3.0993E+01

1.1860E+01

-3.1612E+00

5.5488E-01

-5.7311E-02

2.6181E-03

S10

5.4846E-01

-6.7723E-01

3.1750E-01

-8.7655E-02

1.4837E-02

-1.4313E-03

6.0527E-05

TABLE 12

Fig. 27 shows on-axis chromatic aberration curves of the optical imaging lens of example six, which represent the deviation of the convergence focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 28 shows a chromatic aberration of magnification curve of the optical imaging lens of example six, which represents deviations of different image heights on the imaging plane after light passes through the optical imaging lens. Fig. 29 shows astigmatism curves of the optical imaging lens of example six, which represent meridional field curvature and sagittal field curvature. Fig. 30 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. 27 to 30, 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.

Conditional formula/example	1	2	3	4	5	6
							TTL/ImgH/Fno	1.42	1.28	1.19	1.28	1.06	1.17
f*tan(Semi-FOV)/TD	0.51	0.53	0.59	0.55	0.56	0.57
							TTL/TD	1.23	1.24	1.24	1.22	1.22	1.26
f/ImgH	0.60	0.58	0.54	0.53	0.53	0.59
							SD/TD	0.66	0.67	0.67	0.66	0.66	0.67
\|f1/f-f3/f\|	0.16	0.17	0.18	0.26	0.20	0.55
							f2/f	0.97	0.97	0.97	1.01	1.01	0.89
f2/(R3+R4)	0.64	0.64	0.64	0.66	0.65	0.55
							(R9-R10)/(R9+R10)	0.20	0.20	0.20	0.19	0.19	0.09
T12/∑AT	0.80	0.80	0.80	0.83	0.83	0.73
							\|CT1-CT2\|/\|CT3-CT5\|	0.10	0.10	0.11	0.14	0.02	0.48
CT1/CT2	0.99	0.99	0.99	1.01	1.00	0.92
							∑AT/BFL	0.78	0.77	0.76	0.81	0.79	0.76
CT1/ET1	1.16	1.19	1.21	1.30	1.34	1.15
							ET4/(ET2+ET3)	0.37	0.37	0.35	0.36	0.35	0.33
V3+V5	39.60	39.60	39.60	39.60	39.60	39.60
							DT11/DT52	1.05	1.03	0.98	1.03	1.02	0.95
DT_MIN/DT_MAX	0.34	0.34	0.33	0.30	0.29	0.27
							(SAG22-SAG31)/(SAG21+SAG32)	1.14	1.13	1.11	1.16	1.16	1.35
SAG42/(SAG12+SAG22)	0.98	0.98	0.95	0.89	0.91	0.90

Watch 13

Table 14 gives effective focal lengths f of the optical imaging lenses of example one to example six, and effective focal lengths f1 to f5 of the respective lenses.

Examples refer toNumber of	1	2	3	4	5	6
							f1(mm)	-2.51	-2.51	-2.51	-2.48	-2.48	-2.80
f2(mm)	1.17	1.17	1.17	1.18	1.17	1.15
							f3(mm)	-2.70	-2.72	-2.72	-2.79	-2.72	-2.08
f4(mm)	1.78	1.78	1.79	1.81	1.78	2.81
							f5(mm)	-4.06	-4.10	-4.14	-4.16	-4.30	344.66
f(mm)	1.20	1.21	1.21	1.17	1.16	1.29
							TTL(mm)	5.10	5.10	5.10	5.19	5.15	5.03
ImgH(mm)	2.00	2.10	2.25	2.20	2.20	2.18
							Semi-FOV(°)	60.25	61.28	63.70	63.39	63.81	60.40
\|DIST_0.8F\|	0.13％	0.09％	0.14％	0.39％	0.33％	0.03％

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 to an image side of the optical imaging lens:

the image side surface of the first lens is a concave surface;

a second lens having a positive optical power;

a third lens element, an object-side surface of the third lens element being convex;

a fourth lens having a positive optical power;

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

the on-axis distance TTL from the object side surface of the first lens to the imaging surface, the half of the diagonal length imgH of the effective pixel area on the imaging surface and the aperture value Fno of the optical imaging lens meet the following conditions: 1< TTL/ImgH/Fno < 1.5; the maximum half field angle Semi-FOV of the optical imaging lens meets the following requirements: 60 ° < Semi-FOV <70 °.

2. The optical imaging lens of claim 1, wherein the effective focal length f of the optical imaging lens, the maximum half field angle Semi-FOV 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 fifth lens satisfy: 0.5< f tan (Semi-FOV)/TD < 0.6.

3. The optical imaging lens of claim 1, wherein an on-axis distance TTL from an object-side surface of the first lens element to the imaging surface and an on-axis distance TD from the object-side surface of the first lens element to an image-side surface of the fifth lens element satisfy: 1.2< TTL/TD < 1.3.

4. The optical imaging lens of claim 1, wherein the effective focal length f of the optical imaging lens and the ImgH which is half of the diagonal length of the effective pixel area on the imaging surface satisfy: 0.5< f/ImgH < 0.7.

5. The optical imaging lens of claim 1, wherein a distance SD from a diaphragm to an image side surface of the fifth lens and an on-axis distance TD from an object side surface of the first lens to the image side surface of the fifth lens satisfy: 0.6< SD/TD < 0.7.

6. The optical imaging lens of claim 1, wherein the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens and the effective focal length f3 of the third lens satisfy: i f1/f-f3/f < 0.6.

7. The optical imaging lens of claim 1, wherein the effective focal length f of the optical imaging lens and the effective focal length f2 of the second lens satisfy: 0.8< f2/f < 1.1.

8. The optical imaging lens of claim 1, wherein the effective focal length f2 of the second lens, the radius of curvature R3 of the object side surface of the second lens, and the radius of curvature R4 of the image side surface of the second lens satisfy: 0.5< f2/(R3+ R4) < 0.7.

9. The optical imaging lens of claim 1, wherein a radius of curvature R9 of the object-side surface of the fifth lens and a radius of curvature R10 of the image-side surface of the fifth lens satisfy: 0< (R9-R10)/(R9+ R10) < 0.3.

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

the image side surface of the first lens is a concave surface;

a second lens having a positive optical power;

a fourth lens having a positive optical power;

the on-axis distance TTL from the object side surface of the first lens to the imaging surface, the half of the diagonal length imgH of the effective pixel area on the imaging surface and the aperture value Fno of the optical imaging lens meet the following conditions: 1< TTL/ImgH/Fno < 1.5; the effective focal length f of the optical imaging lens, the maximum half field angle Semi-FOV 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 fifth lens meet the following conditions: 0.5< f tan (Semi-FOV)/TD < 0.6.