CN117631214A

CN117631214A - Optical imaging lens

Info

Publication number: CN117631214A
Application number: CN202311599034.2A
Authority: CN
Inventors: 姚泽杰; 刘浩鹏; 徐胡伟; 方荣波; 闻人建科; 戴付建
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2023-11-27
Filing date: 2023-11-27
Publication date: 2024-03-01

Abstract

The present invention provides an optical imaging lens comprising: the lens group sequentially comprises first lenses to fifth lenses which are arranged at intervals from the object side to the image side of the optical imaging lens; a plurality of spacers; the lens barrel, the lens group and the plurality of spacers are accommodated in the lens barrel; wherein, half of the half-FOV of the maximum field angle of the optical imaging lens satisfies: 60 ° < Semi-FOV <70 °; the distance EP01 from the object side end surface of the lens barrel to the object side surface of the first isolation piece along the optical axis direction of the optical imaging lens, the distance EP12 from the image side surface of the first isolation piece to the object side surface of the second isolation piece along the optical axis direction, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens meet the following conditions: -3< (EP 01+ EP 12)/(f1 + f 2) <1. The invention solves the problem of serious stray light at the front end of the optical imaging lens in the prior art.

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

With the development of the electronic product industry, the use of ultra-wide-angle optical imaging lenses mounted on electronic products is continuously changing. For the five-piece ultra-wide angle optical imaging lens, the visual field of the lens is wide, a large amount of light enters the optical imaging lens, and meanwhile, the edge of the lens at the front end of the lens is subjected to large-angle refraction, so that a large amount of stray light is generated at a non-effective diameter position, and the imaging quality of the lens is greatly influenced. Therefore, how to control the light path of the front end of the optical imaging lens and the position and size of the spacer, and effectively shield the excessive light and reduce the generation of stray light while ensuring an ultra-wide angle is an important problem.

Disclosure of Invention

The invention mainly aims to provide an optical imaging lens so as to solve the problem of serious stray light at the front end of the optical imaging lens in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided an optical imaging lens comprising: the lens group sequentially comprises first to fifth lenses arranged at intervals from the object side to the image side of the optical imaging lens, wherein the first lens has negative focal power, the object side of the first lens is concave, the second lens has positive focal power, the object side of the third lens is convex, and the object side of the fifth lens is convex; a plurality of spacers positioned on the image side of the first lens and at least partially contacting the image side of the first lens, a second spacer positioned on the image side of the second lens and at least partially contacting the image side of the second lens, an inner diameter of an object side of the second spacer being smallest among inner diameters of object sides of all spacers of the plurality of spacers, an inner diameter of an image side of the second spacer being smallest among inner diameters of image sides of all spacers of the plurality of spacers; the lens barrel, the lens group and the plurality of spacers are accommodated in the lens barrel; wherein, half of the half-FOV of the maximum field angle of the optical imaging lens satisfies: 60 ° < Semi-FOV <70 °; the distance EP01 from the object side end surface of the lens barrel to the object side surface of the first isolation piece along the optical axis direction of the optical imaging lens, the distance EP12 from the image side surface of the first isolation piece to the object side surface of the second isolation piece along the optical axis direction, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens meet the following conditions: -3< (EP 01+ EP 12)/(f1 + f 2) <1.

According to another aspect of the present invention, there is provided an optical imaging lens comprising: the lens group sequentially comprises first to fifth lenses arranged at intervals from the object side to the image side of the optical imaging lens, wherein the first lens has negative focal power, the object side of the first lens is concave, the second lens has positive focal power, the object side of the third lens is convex, and the object side of the fifth lens is convex; a plurality of spacers positioned on the image side of the first lens and at least partially contacting the image side of the first lens, a second spacer positioned on the image side of the second lens and at least partially contacting the image side of the second lens, an inner diameter of an object side of the second spacer being smallest among inner diameters of object sides of all spacers of the plurality of spacers, an inner diameter of an image side of the second spacer being smallest among inner diameters of image sides of all spacers of the plurality of spacers; the lens barrel, the lens group and the plurality of spacers are accommodated in the lens barrel; wherein, half of the half-FOV of the maximum field angle of the optical imaging lens satisfies: 60 ° < Semi-FOV <70 °; the inner diameter d1s of the object side surface of the first separator and the inner diameter d2s of the object side surface of the second separator satisfy the following conditions: 1< d1s/d2s <3, the inner diameter d1s of the object side surface of the first spacer, the inner diameter d2s of the object side surface of the second spacer, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy the following conditions: -0.5< (d 1s-d2 s)/(f 1-f 2) <0. The application provides an optical imaging lens of super wide angle of five formula, optical imaging lens's field of vision scope is wide, a large amount of light gets into optical imaging lens, because first lens has negative focal power, the second lens has positive focal power, the positive negative sign of focal power of first lens and second lens is opposite, the refraction of great angle takes place at the edge of two preceding lenses for light, thereby produce a large amount of stray light, the internal diameter of control second separator is less, while shielding a large amount of stray light that produce in second lens department, but still there is the reflection stray light that the light produced in the non-effective footpath position of first lens and second lens. According to the optical imaging lens, the effective focal length of the first lens and the effective focal length of the second lens are controlled, the inner diameter of the first isolation piece and the inner diameter of the second isolation piece are controlled to be the smallest, the propagation path of marginal light can be limited by the first isolation piece and the second isolation piece, the light generating stray light is blocked, the stray light quality of the optical imaging lens is effectively improved, and the imaging performance of the optical imaging lens is improved. Meanwhile, the second isolation piece further ensures the effect of intercepting stray light under the condition of ensuring illumination so as to avoid the back propagation of stray light to the optical imaging lens.

Further, the inner diameter d1s of the object side surface of the first separator and the inner diameter d2s of the object side surface of the second separator satisfy: 1< d1s/d2s <3, the inner diameter d1s of the object side surface of the first spacer, the inner diameter d2s of the object side surface of the second spacer, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy the following conditions: -0.5< (d 1s-d2 s)/(f 1-f 2) <0.

Further, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the outer diameter D2m of the image side surface of the second spacer, and the inner diameter D2m of the image side surface of the second spacer satisfy: -3< (f2+f3)/(D2 m-D2 m) <2.

Further, the distance EP01 between the object side end surface of the lens barrel and the object side surface of the first spacer along the optical axis direction, the center thickness CT1 of the first lens, the distance EP12 between the image side surface of the first spacer and the object side surface of the second spacer along the optical axis direction, and the center thickness CT2 of the second lens satisfy: 0< EP01/CT1-EP12/CT2<3.

Further, the inner diameter d1s of the object side surface of the first spacer, the entrance pupil diameter EPD of the optical imaging lens, and half of the maximum field angle Semi-FOV of the optical imaging lens satisfy: 3< d1s/EPD tan (Semi-FOV) <8.

Further, the plurality of spacers are located at the image side of the third lens and at least partially contacted with the image side of the third lens, the positive and negative signs of the optical power of the third lens and the optical power of the fourth lens are opposite, and the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy the following conditions: -9< f3/f4<0, the inner diameter d3s of the object side of the third spacer, the center thickness CT3 of the third lens, the on-axis distance T34 from the image side of the third lens to the object side of the fourth lens, the center thickness CT4 of the fourth lens satisfying: 1< d3 s/(CT3+T34+CT4) <2.

Further, the plurality of spacers are located at the image side of the third lens and at least partially contacted with the image side of the third lens, and the outer diameter D3m of the image side of the third spacer, the inner diameter D3s of the object side of the third spacer, and the combined focal length f34 of the third lens and the fourth lens satisfy the following conditions: 1< (D3 m-D3 s)/f 34<4.

Further, the plurality of spacers are located at the image side of the third lens and at least partially contacted with the image side of the third lens, the plurality of spacers are located at the image side of the fourth lens and at least partially contacted with the image side of the fourth lens, and the distance EP23 from the image side of the second spacer to the object side of the third spacer along the optical axis direction, the effective focal length f3 of the third lens, the distance EP34 from the image side of the third spacer to the object side of the fourth spacer along the optical axis direction, and the effective focal length f4 of the fourth lens satisfy the following conditions: -1< EP23/f3-EP34/f4<1.

Further, the plurality of spacers are at least partially in contact with the image side of the fourth lens element, and the on-axis distance from the image side of the fourth lens element to the object side of the fifth lens element is the smallest among the on-axis distances of any two adjacent lens elements in the lens group, and the on-axis distance T45 from the image side of the fourth lens element to the object side of the fifth lens element and the maximum thickness CP4 of the fourth spacers satisfy: 0< T45/CP4<5, the outer diameter D4s of the object side surface of the fourth spacer, the curvature radius R8 of the image side surface of the fourth lens, the outer diameter D4m of the image side surface of the fourth spacer, and the curvature radius R9 of the object side surface of the fifth lens satisfy the following conditions: -10< D4s/R8+D4m/R9<11.

Further, the plurality of spacers are located at the image side of the fourth lens and at least partially contact with the image side of the fourth lens, the positive and negative signs of the focal power of the fifth lens and the focal power of the fourth lens are opposite, and the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy: -2< f4/f5<0, the inner diameter d4s of the object side surface of the fourth spacer, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens satisfying: -1< d4 s/(f 4-f 5) <2.

Further, the plurality of spacers are located at the image side of the fourth lens and at least partially contact with the image side of the fourth lens, and the inner diameter d1s of the object side surface of the first spacer and the inner diameter d0s of the object side end surface of the lens barrel satisfy the following conditions: 0.2< d1s/d0s <0.5, and the inner diameter d4s of the object side surface of the fourth spacer and the inner diameter d0m of the image side end surface of the lens barrel satisfy: 0.3< d4s/d0m <0.5.

Further, the inner diameter d0m of the image side end surface of the lens barrel, the inner diameter d0s of the object side end surface of the lens barrel, and the entrance pupil diameter EPD of the optical imaging lens satisfy: 1< (d 0m-d0 s)/EPD <3.

Further, the plurality of spacers are located on the image side of the third lens and AT least partially contact with the image side of the third lens, the plurality of spacers are located on the image side of the fourth lens and AT least partially contact with the image side of the fourth lens, and the sum Σat of the distances on the axes of any two adjacent lenses from the first lens to the fifth lens, and the sum Σcp of the maximum thicknesses of the first spacer to the fourth spacer satisfy the following conditions: 7< ΣAT/ΣCP <11.

Further, the sum of the inflection points on the object side surface of the fourth lens, the image side surface of the fourth lens, the object side surface of the fifth lens and the image side surface of the fifth lens is at least two.

Further, the plurality of spacers are located on the image side of the fourth lens and at least partially contacted with the image side of the fourth lens, the plurality of spacers are located on the image side of the fourth spacer and at least partially contacted with the image side of the fourth spacer, and the maximum thickness CP4b of the fourth auxiliary spacer and the maximum thickness CP4 of the fourth spacer satisfy: CP4b > CP4.

By applying the technical scheme of the invention, the optical imaging lens comprises a lens group, a plurality of spacers and a lens cone, wherein the lens group sequentially comprises a first lens to a fifth lens which are arranged at intervals from the object side of the optical imaging lens to the image side, the first lens has negative focal power, the object side of the first lens is a concave surface, the second lens has positive focal power, the object side of the third lens is a convex surface, and the object side of the fifth lens is a convex surface; the plurality of spacers are positioned on the image side of the first lens and at least partially contacted with the image side of the first lens, the plurality of spacers are positioned on the image side of the second lens and at least partially contacted with the image side of the second lens, the inner diameter of the object side of the second spacer is the smallest in the inner diameters of the object sides of all spacers of the plurality of spacers, and the inner diameter of the image side of the second spacer is the smallest in the inner diameters of the image sides of all spacers of the plurality of spacers; the lens group and the plurality of spacers are accommodated in the lens cone; wherein, half of the half-FOV of the maximum field angle of the optical imaging lens satisfies: 60 ° < Semi-FOV <70 °; the distance EP01 from the object side end surface of the lens barrel to the object side surface of the first isolation piece along the optical axis direction of the optical imaging lens, the distance EP12 from the image side surface of the first isolation piece to the object side surface of the second isolation piece along the optical axis direction, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens meet the following conditions: -3< (EP 01+ EP 12)/(f1 + f 2) <1.

The application provides an optical imaging lens of super wide angle of five formula, optical imaging lens's field of vision scope is wide, a large amount of light gets into optical imaging lens, because first lens has negative focal power, the second lens has positive focal power, the positive negative sign of focal power of first lens and second lens is opposite, the refraction of great angle takes place at the edge of two preceding lenses for light, thereby produce a large amount of stray light, the internal diameter of control second separator is less, while shielding a large amount of stray light that produce in second lens department, but still there is the reflection stray light that the light produced in the non-effective footpath position of first lens and second lens. This application is through the effective focal length of control first lens and second lens to and the thing side terminal surface of lens cone, first separator, the second separator is along the transverse distance of optical axis direction, the internal diameter that combines control second separator is minimum, can combine lens cone front end and first separator and second separator better, through limiting its transverse position, thereby limit the route of marginal light in the non-effective footpath position of first lens and second lens, play the effect of eliminating the non-effective footpath position reflection stray light of first lens and second lens, the second separator further guarantees the effect of interception stray light under the circumstances of guaranteeing the illuminance simultaneously, in order to avoid the rear propagation of stray light to optical imaging lens.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 is a schematic view of a portion of parameters of an optical imaging lens according to an alternative embodiment of the present invention;

FIG. 2 is a schematic view of another part of parameters of an optical imaging lens according to an alternative embodiment of the present invention;

fig. 3 is a schematic structural diagram of an optical imaging lens according to a first embodiment of the present invention;

fig. 4 to 7 show a magnification chromatic aberration curve, an on-axis chromatic aberration curve, an astigmatism curve, and a distortion curve, respectively, according to the first embodiment of the present invention;

fig. 8 is a schematic structural diagram of an optical imaging lens according to a second embodiment of the present invention;

fig. 9 is a schematic structural view of an optical imaging lens according to a third embodiment of the present invention;

fig. 10 is a schematic structural view of an optical imaging lens according to a fourth embodiment of the present invention;

fig. 11 to 14 show a magnification chromatic aberration curve, an on-axis chromatic aberration curve, an astigmatism curve, and a distortion curve, respectively, of the fourth embodiment of the present invention;

fig. 15 is a schematic structural diagram of an optical imaging lens according to a fifth embodiment of the present invention;

Fig. 16 is a schematic diagram showing the structure of an optical imaging lens according to a sixth embodiment of the present invention;

fig. 17 is a schematic structural diagram of an optical imaging lens according to a seventh embodiment of the present invention;

fig. 18 to 21 show a magnification chromatic aberration curve, an on-axis chromatic aberration curve, an astigmatism curve, and a distortion curve, respectively, of embodiment seven of the present invention;

fig. 22 is a schematic diagram showing the structure of an optical imaging lens according to an eighth embodiment of the present invention;

fig. 23 is a schematic structural view showing an optical imaging lens according to a ninth embodiment of the present invention;

fig. 24 shows a stray light energy diagram of an optical imaging lens according to an alternative embodiment of the present invention under the conditions of Semi-fov= 62.23 °, (EP 01+ep 12)/(f1+f2) = -2.57;

fig. 25 shows a stray light energy diagram of an optical imaging lens according to another alternative embodiment of the present invention under the conditions of semifov= 62.23 °, (EP 01+ep 12)/(f1+f2) =0.92;

fig. 26 shows a stray light energy diagram of an optical imaging lens in the prior art under the conditions of semifov= 62.23 °, (EP 01+ep12)/(f1+f2) = -5;

fig. 27 shows a stray light energy diagram of an optical imaging lens in the related art under the conditions of semifov= 62.23 °, (EP 01+ep12)/(f1+f2) =0.92.

Wherein the above figures include the following reference numerals:

P0, lens barrel; e1, a first lens; s1, an object side surface of a first lens; s2, an image side surface of the first lens; p1, a first spacer; e2, a second lens; s3, the object side surface of the second lens; s4, the image side surface of the second lens; p2, a second spacer;

e3, a third lens; s5, the object side surface of the third lens; s6, the image side surface of the third lens; p3, a third spacer; e4, a fourth lens; s7, the object side surface of the fourth lens; s8, the image side surface of the fourth lens is provided; p4, fourth spacers; p4b, fourth auxiliary spacers; e5, a fifth lens; s9, the object side surface of the fifth lens; s10, an image side surface of the fifth lens.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that 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 unless otherwise indicated.

In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present invention.

In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for convenience of explanation. Specifically, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are 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, then 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 determination of the surface shape in the paraxial region can be performed by a determination method by a person skilled in the art by positive or negative determination of the concave-convex with R value (R means the radius of curvature of the paraxial region, and generally means the R value on a lens database (lens data) in optical software). In 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 image side, the concave surface is determined when the R value is positive, and the convex surface is determined when the R value is negative.

The invention provides an optical imaging lens for solving the problem that stray light at the front end of the optical imaging lens is serious in the prior art.

First embodiment

As shown in fig. 1 to 25, the optical imaging lens includes a lens group, a plurality of spacers, and a lens barrel, and the lens group sequentially includes, from an object side to an image side of the optical imaging lens, first lenses to fifth lenses arranged at intervals, the first lenses having negative optical power, an object side of the first lenses being concave, the second lenses having positive optical power, an object side of the third lenses being convex, and an object side of the fifth lenses being convex; the plurality of spacers are positioned on the image side of the first lens and at least partially contacted with the image side of the first lens, the plurality of spacers are positioned on the image side of the second lens and at least partially contacted with the image side of the second lens, the inner diameter of the object side of the second spacer is the smallest in the inner diameters of the object sides of all spacers of the plurality of spacers, and the inner diameter of the image side of the second spacer is the smallest in the inner diameters of the image sides of all spacers of the plurality of spacers; the lens group and the plurality of spacers are accommodated in the lens cone; wherein, half of the half-FOV of the maximum field angle of the optical imaging lens satisfies: 60 ° < Semi-FOV <70 °; the distance EP01 from the object side end surface of the lens barrel to the object side surface of the first isolation piece along the optical axis direction of the optical imaging lens, the distance EP12 from the image side surface of the first isolation piece to the object side surface of the second isolation piece along the optical axis direction, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens meet the following conditions: -3< (EP 01+ EP 12)/(f1 + f 2) <1.

Preferably, 61 ° < Semi-FOV <65 °.

Preferably, -2.80< (EP 01+ EP 12)/(f1 + f 2) <0.95.

The comparison between the optical imaging lens of the prior art and the optical imaging lens of the present application on the premise that the Semi-FOV is 62.23 ° is shown in table 1, for example.

TABLE 1

As shown in table 1 and fig. 26, the optical imaging lens of the prior art has stronger stray light energy under the condition that (EP 01+ EP 12)/(f1 + f 2) = -5 is satisfied. As shown in table 1 and fig. 27, the optical imaging lens of the related art is also strong in stray light energy under the condition that (EP 01+ EP 12)/(f1 + f 2) =5 is satisfied.

As shown in table 1 and fig. 24, the optical imaging lens of the present application has weaker stray light energy under the condition that (EP 01+ EP 12)/(f1 + f 2) = -2.57 is satisfied. As shown in table 1 and fig. 25, the optical imaging lens of the present application is weak in stray light energy under the condition that (EP 01+ep 12)/(f1+f2) =0.92 is satisfied. Compared with the prior art shown in fig. 26 and 27, the optical imaging lens can effectively improve stray light and imaging effect.

In the present embodiment, the inner diameter d1s of the object side surface of the first separator and the inner diameter d2s of the object side surface of the second separator satisfy: 1< d1s/d2s <3, the inner diameter d1s of the object side surface of the first spacer, the inner diameter d2s of the object side surface of the second spacer, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy the following conditions: -0.5< (d 1s-d2 s)/(f 1-f 2) <0. The inner diameters of the first and second spacers are effectively controlled by limiting d1s/d2s (d 1s-d2 s)/(f 1-f 2) within a reasonable range, and the first and second spacers are utilized to block light rays generating stray light, so that the stray light quality of the optical imaging lens is effectively improved, and the imaging performance of the optical imaging lens is improved. Preferably, 1.05< d1s/d2s <2.85, -0.4< (d 1s-d2 s)/(f 1-f 2) <0.

In the present embodiment, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the outer diameter D2m of the image side surface of the second spacer, and the inner diameter D2m of the image side surface of the second spacer satisfy the following conditions: -3< (f2+f3)/(D2 m-D2 m) <2. The difference value between the inner diameter and the outer diameter of the second isolation piece is effectively controlled by limiting (f2+f3)/(D2 m-D2 m) in a reasonable range, so that the machinability of the second isolation piece is ensured, the second isolation piece can shield redundant light, stray light of the optical imaging lens is improved, and the imaging quality of the optical imaging lens is improved. Preferably, -2.5< (f2+f3)/(D2 m-D2 m) <0.

In the present embodiment, a distance EP01 between an object side end surface of the lens barrel and an object side surface of the first spacer in the optical axis direction, a center thickness CT1 of the first lens, a distance EP12 between an image side surface of the first spacer and an object side surface of the second spacer in the optical axis direction, and a center thickness CT2 of the second lens satisfy: 0< EP01/CT1-EP12/CT2<3. Through limiting the EP01/CT1-EP12/CT2 within a reasonable range, the center thickness of the first lens and the second lens is controlled, the uniformity of the thickness of the first lens and the second lens is effectively ensured, the forming of the first lens and the second lens is facilitated, and the forming yield of the first lens and the second lens is improved. Preferably 0.1< EP01/CT1-EP12/CT2<2.8.

In the present embodiment, the inner diameter d1s of the object side surface of the first spacer, the entrance pupil diameter EPD of the optical imaging lens, and half of the maximum field angle Semi-FOV of the optical imaging lens satisfy: 3< d1s/EPD tan (Semi-FOV) <8. Through limiting d1s/EPD (Semi-FOV) within a reasonable range, the inner diameter of the first lens and the entrance pupil diameter of the optical imaging lens are effectively controlled, the light flux of the optical imaging lens can be effectively controlled, and reflected light at the position is effectively intercepted by controlling the inner diameter of the first isolation piece, so that the imaging quality is improved. Preferably, 3.5< d1s/EPD tan (Semi-FOV) <7.8.

In the present embodiment, the plurality of spacers are located on the image side of the third lens and at least partially contact the image side of the third lens, and the positive and negative signs of the optical power of the third lens and the optical power of the fourth lens are opposite, so that the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy: -9< f3/f4<0, the inner diameter d3s of the object side of the third spacer, the center thickness CT3 of the third lens, the on-axis distance T34 from the image side of the third lens to the object side of the fourth lens, the center thickness CT4 of the fourth lens satisfying: 1< d3 s/(CT3+T34+CT4) <2. By limiting f3/f4 and d3 s/(CT 3+T34+CT4) within a reasonable range, the assembly stability of the third lens and the fourth lens is improved, the problem of low yield caused by the matching amount is solved, the molding and reasonable sequencing of the lens group and the lens barrel structure are ensured, and the assembly stability of the lens group is ensured. Preferably, -8.5< f3/f4< -0.3,1.3< d3 s/(CT3+T34+CT4) <1.8.

In the present embodiment, the plurality of spacers are located on the image side of the third lens and at least partially in contact with the image side surface of the third lens, and the outer diameter D3m of the image side surface of the third spacer, the inner diameter D3s of the object side surface of the third spacer, and the combined focal length f34 of the third lens and the fourth lens satisfy the following conditions: 1< (D3 m-D3 s)/f 34<4. The difference value of the inner diameter and the outer diameter of the third isolation piece can be effectively controlled by limiting (D3 m-D3 s)/f 34 in a reasonable range, so that the processing feasibility of the third isolation piece is ensured, meanwhile, the third isolation piece can shield redundant light, stray light generated by the third lens is improved, and the imaging quality is improved. Preferably 1.2< (D3 m-D3 s)/f 34<3.5.

In the present embodiment, the third spacer is located on the image side of the third lens and is at least partially in contact with the image side of the third lens, the fourth spacer is located on the image side of the fourth lens and is at least partially in contact with the image side of the fourth lens, and the distance EP23 from the image side of the second spacer to the object side of the third spacer in the optical axis direction, the effective focal length f3 of the third lens, the distance EP34 from the image side of the third spacer to the object side of the fourth spacer in the optical axis direction, and the effective focal length f4 of the fourth lens satisfy the following conditions: -1< EP23/f3-EP34/f4<1. By limiting EP23/f3-EP34/f4 to a reasonable range, the spacing between the second spacer, the third spacer and the fourth spacer is controlled, so that the second spacer and the third spacer can be inserted between lenses; the larger the EP23 and EP34 are, the easier the spacer is to select, and the larger the flare improvement space is, which is advantageous for improving the overall flare quality of the optical imaging lens. Preferably, -0.8< EP23/f3-EP34/f4<0.8.

In the present embodiment, the plurality of spacers are the fourth spacers located on the image side of the fourth lens and at least partially in contact with the image side of the fourth lens, and the axial distance from the image side of the fourth lens to the object side of the fifth lens is the smallest among the axial distances between any two adjacent lenses in the lens group, and the axial distance T45 between the image side of the fourth lens and the object side of the fifth lens and the maximum thickness CP4 of the fourth spacers satisfy: 0< T45/CP4<5, the outer diameter D4s of the object side surface of the fourth spacer, the curvature radius R8 of the image side surface of the fourth lens, the outer diameter D4m of the image side surface of the fourth spacer, and the curvature radius R9 of the object side surface of the fifth lens satisfy the following conditions: -10< D4s/R8+D4m/R9<11. The T45/CP4 and D4s/R8+D4m/R9 are limited in a reasonable range, the size of the T45 is controlled, and the axial distance between the fourth lens and the fifth lens is adjusted, so that the compensation of the curvature of field change of the optical imaging lens is facilitated, and the imaging quality of the optical imaging lens is improved. Preferably, 0.5< T45/CP4<4.8, -9.5< D4s/R8+D4m/R9<8.5.

In the present embodiment, the plurality of spacers are located on the image side of the fourth lens and at least partially contact the image side of the fourth lens, and the positive and negative signs of the optical power of the fifth lens and the optical power of the fourth lens are opposite, so that the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy: -2< f4/f5<0, the inner diameter d4s of the object side surface of the fourth spacer, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens satisfying: -1< d4 s/(f 4-f 5) <2. By limiting f4/f5 and d4 s/(f 4-f 5) within a reasonable range, the difference value of the inner diameter and the outer diameter of the fourth isolation piece can be effectively controlled, the processing feasibility of the fourth isolation piece is ensured, the fourth isolation piece can shield redundant light, stray light generated by the third lens is improved, and the imaging quality is improved. Preferably, -1.8< f4/f5< -0.5, -0.8< d4 s/(f 4-f 5) <1.5.

In the present embodiment, the plurality of spacers are located on the image side of the fourth lens element and at least partially in contact with the image side surface of the fourth lens element, and the inner diameter d1s of the object side surface of the first spacer and the inner diameter d0s of the object side end surface of the lens barrel satisfy the following conditions: 0.2< d1s/d0s <0.5, and the inner diameter d4s of the object side surface of the fourth spacer and the inner diameter d0m of the image side end surface of the lens barrel satisfy: 0.3< d4s/d0m <0.5. The uniformity of the inner diameter gear structure of the lens barrel is improved by limiting d1s/d0s and d4s/d0m in a reasonable range, so that the assembly stability of the lens is improved; redundant light can be intercepted by the first isolating piece and the fourth isolating piece, and stray light of the lens is reduced. Preferably, 0.25< d1s/d0s <0.45,0.35< d4s/d0m <0.47.

In the present embodiment, the inner diameter d0m of the image side end surface of the lens barrel, the inner diameter d0s of the object side end surface of the lens barrel, and the entrance pupil diameter EPD of the optical imaging lens satisfy: 1< (d 0m-d0 s)/EPD <3. By limiting (d 0m-d0 s)/EPD to a reasonable range, the difference between the inner diameter of the image side end surface and the inner diameter of the object side surface of the lens barrel is effectively controlled, so that the uniformity of the lens barrel structure can be improved, and the assembly stability can be improved. Preferably 1.2< (d 0m-d0 s)/EPD <2.8.

In the present embodiment, the third spacer is located on the image side of the third lens and is AT least partially in contact with the image side of the third lens, the fourth spacer is located on the image side of the fourth lens and is AT least partially in contact with the image side of the fourth lens, and the sum Σat of the distances on the axes of any two adjacent lenses from the first lens to the fifth lens, and the sum Σcp of the maximum thicknesses of the first spacer to the fourth spacer satisfy the following conditions: 7< ΣAT/ΣCP <11. The sigma AT/sigma CP is limited in a reasonable range, so that the total thickness of the lens group is controlled, and the length of the lens barrel is controlled, thereby compressing the length of the optical imaging lens, reducing the volume of the optical imaging lens and realizing the miniaturization of the module. Preferably, 7.10< ΣAT/ΣCPs <10.98.

In the present embodiment, the sum of the inflection points on the object side surface of the fourth lens, the image side surface of the fourth lens, the object side surface of the fifth lens, and the image side surface of the fifth lens is at least two. The fourth lens and the fifth lens are optimized by adopting an aspheric equation, and the inflection points appear in the effective diameter, so that the optimization of the optical imaging lens is facilitated, the ring ghost image can be improved, the imaging precision is improved, and the imaging is obviously beneficial.

In the present embodiment, the fourth spacer is located on the image side of the fourth lens and is at least partially in contact with the image side of the fourth lens, the fourth auxiliary spacer is located on the image side of the fourth spacer and is at least partially in contact with the image side of the fourth spacer, and the maximum thickness CP4b of the fourth auxiliary spacer and the maximum thickness CP4 of the fourth spacer satisfy: CP4b > CP4. Through control CP4b > CP4, carry out effective control to the thickness of fourth auxiliary isolation spare, fourth auxiliary isolation spare has realized the section difference transition between fourth lens and the fifth lens, has realized the stable bearing of structure, has promoted the assemblage stability of camera lens.

Second embodiment

As shown in fig. 1 to 25, the optical imaging lens includes a lens group, a plurality of spacers, and a lens barrel, and the lens group sequentially includes, from an object side to an image side of the optical imaging lens, first lenses to fifth lenses arranged at intervals, the first lenses having negative optical power, an object side of the first lenses being concave, the second lenses having positive optical power, an object side of the third lenses being convex, and an object side of the fifth lenses being convex; the plurality of spacers are positioned on the image side of the first lens and at least partially contacted with the image side of the first lens, the plurality of spacers are positioned on the image side of the second lens and at least partially contacted with the image side of the second lens, the inner diameter of the object side of the second spacer is the smallest in the inner diameters of the object sides of all spacers of the plurality of spacers, and the inner diameter of the image side of the second spacer is the smallest in the inner diameters of the image sides of all spacers of the plurality of spacers; the lens group and the plurality of spacers are accommodated in the lens cone; wherein, half of the half-FOV of the maximum field angle of the optical imaging lens satisfies: 60 ° < Semi-FOV <70 °; the inner diameter d1s of the object side surface of the first separator and the inner diameter d2s of the object side surface of the second separator satisfy the following conditions: 1< d1s/d2s <3, the inner diameter d1s of the object side surface of the first spacer, the inner diameter d2s of the object side surface of the second spacer, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy the following conditions: -0.5< (d 1s-d2 s)/(f 1-f 2) <0.

The application provides an optical imaging lens of super wide angle of five formula, optical imaging lens's field of vision scope is wide, a large amount of light gets into optical imaging lens, because first lens has negative focal power, the second lens has positive focal power, the positive negative sign of focal power of first lens and second lens is opposite, the refraction of great angle takes place at the edge of two preceding lenses for light, thereby produce a large amount of stray light, the internal diameter of control second separator is less, while shielding a large amount of stray light that produce in second lens department, but still there is the reflection stray light that the light produced in the non-effective footpath position of first lens and second lens. According to the optical imaging lens, the effective focal length of the first lens and the effective focal length of the second lens are controlled, the inner diameter of the first isolation piece and the inner diameter of the second isolation piece are controlled to be the smallest, the propagation path of marginal light can be limited by the first isolation piece and the second isolation piece, the light generating stray light is blocked, the stray light quality of the optical imaging lens is effectively improved, and the imaging performance of the optical imaging lens is improved. Meanwhile, the second isolation piece further ensures the effect of intercepting stray light under the condition of ensuring illumination so as to avoid the back propagation of stray light to the optical imaging lens.

Preferably, 61 ° < Semi-FOV <65 °.

Preferably 1.05< d1s/d2s <2.85.

Preferably, -0.4< (d 1s-d2 s)/(f 1-f 2) <0.

Other conditional expressions in the first embodiment may also be included in this embodiment, and will not be described in detail here.

Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on the imaging surface. The optical imaging lens in the present application may employ a plurality of lenses, for example, five lenses as described above. By reasonably distributing the effective focal length, the surface shape, the center 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 processability 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 and the like.

However, those skilled in the art will appreciate that the number of lenses making up an optical imaging lens may be varied to achieve the various results and advantages described in the specification without departing from the technical solutions claimed herein. For example, although the description is given by taking five lenses as an example 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, if desired.

Fig. 1 and 2 show a schematic structural view of an optical imaging lens of the present application. Parameters D0s, D3s, D4m, etc. are also marked in fig. 1 to clearly and intuitively understand the meaning of the parameters. In order to facilitate the presentation of the optical imaging lens structure and the specific surface shape, these parameters are not further shown in the drawings when describing the specific embodiments.

In fig. 2, dis refers to the outer diameter of the object side surface of the i-th spacer, dis refers to the inner diameter of the object side surface of the i-th spacer, dim refers to the outer diameter of the image side surface of the i-th spacer, dim refers to the inner diameter of the image side surface of the i-th spacer, cpci refers to the maximum thickness of the i-th spacer, that is, the maximum distance from the object side surface of the i-th spacer to the image side surface in the optical axis direction, epi j refers to the distance from the image side surface of the i-th spacer to the object side surface of the j-th spacer in the optical axis direction, wherein i and j are positive integers equal to or greater than 1. And D0s is the inner diameter of the object side end surface of the lens barrel, and D0m is the outer diameter of the image side end surface of the lens barrel.

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

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

Example 1

As shown in fig. 3 to 7, an optical imaging lens of the first embodiment of the present application is described.

As shown in fig. 3, the optical imaging lens includes, in order from an object side to an image side, a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, and a fifth lens E5. Wherein, two adjacent lenses all bear with the spacer of centre gripping in the middle of it, and the internal diameter of first spacer to second spacer reduces gradually, and the internal diameter of second spacer to fourth spacer increases gradually, when guaranteeing camera lens illuminance, limit the propagation path of marginal light to reduce the incidence of light to the non-effective footpath part of lens and produce stray light.

As shown in fig. 3, the first lens element has a negative focal power, the object side surface S1 of the first lens element is a concave surface, the image side surface S2 of the first lens element is a convex surface, the second lens element has a positive focal power, the object side surface S3 of the second lens element is a concave surface, the image side surface S4 of the second lens element is a convex surface, the third lens element has a negative focal power, the object side surface S5 of the third lens element is a convex surface, the image side surface S6 of the third lens element is a concave surface, the fourth lens element has a positive focal power, the object side surface S7 of the fourth lens element is a concave surface, the image side surface S8 of the fourth lens element is a convex surface, the fifth lens element has a negative focal power, the object side surface S9 of the fifth lens element is a convex surface, and the image side surface S10 of the fifth lens element is a concave surface.

Table 2 shows a basic structural parameter table of the optical imaging lens of the first embodiment, in which the units of the radius of curvature, thickness/distance, effective focal length, and effective radius are all millimeter mm.

Face number	Surface type	Radius of curvature	Thickness of (L)	Refractive index	Abbe number	Effective radius
							OBJ	Spherical surface	Infinity is provided	Infinity is provided
S1	Aspherical surface	-2.9570	0.6248	1.54	55.92	1.6292
							S2	Aspherical surface	-6.2723	0.4507			1.0582
STO	Spherical surface	Infinity is provided	0.1000			0.3632
							S3	Aspherical surface	-7.5077	0.4612	1.54	55.92	0.4220
S4	Aspherical surface	-1.1397	0.1087			0.5840
							S5	Aspherical surface	1.8704	0.2000	1.67	19.24	0.7696
S6	Spherical surface	1.3545	0.1431			0.9644
							S7	Aspherical surface	-1.7184	0.9134	1.54	55.92	1.0773
S8	Aspherical surface	-0.5090	0.1000			1.1796
							S9	Aspherical surface	2.6836	0.3400	1.66	20.37	1.4886
S10	Aspherical surface	0.7215	0.4558			1.9352
							S11	Spherical surface	Infinity is provided	0.2100	1.52	64.20	4.0000
S12	Spherical surface	Infinity is provided	0.3900			4.0000
							S13	Spherical surface	Infinity is provided	0.0000

TABLE 2

Also shown in table 2 are the object side S11 of the filter, the image side S12 of the filter, and the imaging plane S13.

In this embodiment, the image side surface of the third lens element is a spherical lens element, and the object side surface and the image side surface of the remaining lens elements are aspheric, and the surface shape of each aspheric lens element can be defined by, but not limited to, the following aspheric formula:

wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspherical surface, c=1/R, i.e. paraxial curvature c is the reciprocal of the radius of curvature R in table 2 above; k is a conic coefficient; ai is the correction coefficient of the aspherical i-th order. The higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for each of the aspherical mirrors in this example are given in Table 3 below.

Face number

A4

A6

A8

A10

A12

A14

A16

S1

3.1328E-01

-7.4801E-01

2.2944E+00

-5.7013E+00

1.0282E+01

-1.3342E+01

1.2569E+01

S2

3.3770E-01

1.4846E-01

-9.1873E+00

6.7620E+01

-2.9004E+02

8.3862E+02

-1.7182E+03

S3

-4.0790E-01

-4.3645E+00

5.1103E+02

-3.1275E+04

1.1057E+06

-2.4975E+07

3.7962E+08

S4

-1.0675E+00

-1.6724E+01

7.5476E+02

-1.5901E+04

2.2031E+05

-2.1397E+06

1.4934E+07

S5

-2.2208E+00

8.9940E+00

-1.3524E+02

2.1688E+03

-2.1949E+04

1.4924E+05

-7.1529E+05

S6

-5.6718E-01

-4.5155E+00

4.0055E+01

-1.5873E+02

3.2308E+02

-5.7093E+01

-1.6896E+03

S7

1.1142E+00

-1.4174E+00

-1.5741E+01

1.5116E+02

-7.1866E+02

2.2221E+03

-4.8240E+03

S8

2.8170E+00

-1.8621E+01

1.0444E+02

-4.5523E+02

1.4904E+03

-3.6249E+03

6.5478E+03

S9

1.6550E+00

-1.1572E+01

4.8680E+01

-1.4818E+02

3.2550E+02

-5.1531E+02

5.9056E+02

S10

-9.3445E-01

1.8709E+00

-5.2364E+00

1.1337E+01

-1.6530E+01

1.6471E+01

-1.1524E+01

Face number

A18

A20

A22

A24

A26

A28

A30

S1

-8.6524E+00

4.3475E+00

-1.5756E+00

4.0083E-01

-6.7884E-02

6.8701E-03

-3.1422E-04

S2

2.5479E+03

-2.7486E+03

2.1379E+03

-1.1683E+03

4.2545E+02

-9.2637E+01

9.1147E+00

S3

-3.9928E+09

2.9384E+10

-1.5068E+11

5.2677E+11

-1.1951E+12

1.5843E+12

-9.3036E+11

S4

-7.5700E+07

2.7862E+08

-7.3569E+08

1.3554E+09

-1.6506E+09

1.1909E+09

-3.8416E+08

S5

2.4697E+06

-6.1751E+06

1.1081E+07

-1.3907E+07

1.1587E+07

-5.7537E+06

1.2882E+06

S6

5.4789E+03

-9.6561E+03

1.0984E+04

-8.2785E+03

4.0096E+03

-1.1332E+03

1.4234E+02

S7

7.6030E+03

-8.7958E+03

7.4151E+03

-4.4347E+03

1.7814E+03

-4.3045E+02

4.7216E+01

S8

-8.7814E+03

8.6931E+03

-6.2573E+03

3.1801E+03

-1.0805E+03

2.2004E+02

-2.0294E+01

S9

-4.9151E+02

2.9625E+02

-1.2771E+02

3.8315E+01

-7.5887E+00

8.9101E-01

-4.6926E-02

S10

5.7603E+00

-2.0680E+00

5.2923E-01

-9.4239E-02

1.1097E-02

-7.7683E-04

2.4479E-05

TABLE 3 Table 3

Fig. 4 shows a chromatic aberration of magnification curve of the optical imaging lens according to the first embodiment, which represents deviations of different image heights on the imaging plane after the light passes through the optical imaging lens. Fig. 5 shows an on-axis chromatic aberration curve of the optical imaging lens of the first embodiment, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the optical imaging lens. Fig. 6 shows an astigmatism curve of the optical imaging lens of the first embodiment, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 7 shows a distortion curve of the optical imaging lens of the first embodiment, which represents distortion magnitude values corresponding to different angles of view.

As can be seen from fig. 4 to fig. 7, the optical imaging lens according to the first embodiment can achieve good imaging quality.

Example two

The difference from the first embodiment is that parameters of the lens barrel P0 and the spacer are different.

As shown in fig. 8, an optical imaging lens of the second embodiment of the present application is described. For brevity, a description of portions similar to those of the first embodiment will be omitted.

The parameters such as the radius of curvature, the center thickness, etc. of the first to fifth lenses of the optical imaging lens and the distance between the lenses thereof are the same as those of the first to fifth embodiments, as shown in tables 2 and 3, but at least some of the parameters such as the lens barrel P0, the thickness of the spacer, the inner diameter of the spacer, the outer diameter of the spacer, and the distance between the spacers are different. The imaging quality of the optical imaging lens of the present embodiment is thus as shown in fig. 4 to 7.

As shown in fig. 8, the first lens and the second lens are buckled to form a buckling structure, the first spacer is disposed at the inner side of the buckling structure, and the first lens and the second lens are abutted at the outer side of the buckling structure.

Example III

As shown in fig. 9, an optical imaging lens of the third embodiment of the present application is described. For brevity, a description of portions similar to those of the first embodiment will be omitted.

The parameters such as the radius of curvature, the center thickness, etc. of the first to fifth lenses of the optical imaging lens and the distance between the lenses thereof are the same as those of the third embodiment, as shown in tables 2 and 3, but at least some of the parameters such as the lens barrel P0, the thickness of the spacer, the inner diameter of the spacer, the outer diameter of the spacer, and the distance between the spacers are different. The imaging quality of the optical imaging lens of the present embodiment is thus as shown in fig. 4 to 7.

As shown in fig. 9, the first lens to the third lens are sequentially buckled to form a buckling structure, the first spacers and the second spacers are respectively arranged at the inner sides of the two buckling structures, and two adjacent lenses are abutted at the outer sides of the buckling structures.

Example IV

The difference from the first embodiment is that parameters of the lens barrel P0, the spacer, and the lens are different.

As shown in fig. 10 to 14, an optical imaging lens of the fourth embodiment of the present application is described. For brevity, a description of portions similar to those of the first embodiment will be omitted.

As shown in fig. 10, the optical imaging lens includes, in order from an object side to an image side, a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, and a fifth lens E5. Wherein, two adjacent lenses all bear with the spacer of centre gripping in the middle of it, and the internal diameter of first spacer to second spacer reduces gradually, and the internal diameter of second spacer to fourth spacer increases gradually, when guaranteeing camera lens illuminance, limit the propagation path of marginal light to reduce the incidence of light to the non-effective footpath part of lens and produce stray light.

As shown in fig. 10, the first lens element has a negative focal power, the object side surface S1 of the first lens element is concave, the image side surface S2 of the first lens element is concave, the second lens element has a positive focal power, the object side surface S3 of the second lens element is convex, the image side surface S4 of the second lens element is concave, the third lens element has a positive focal power, the object side surface S5 of the third lens element is convex, the image side surface S6 of the third lens element is convex, the fourth lens element has a negative focal power, the object side surface S7 of the fourth lens element is convex, the image side surface S8 of the fourth lens element is concave, the fifth lens element has a positive focal power, the object side surface S9 of the fifth lens element is convex, and the image side surface S10 of the fifth lens element is convex.

Table 4 shows a basic structural parameter table of an optical imaging lens of the fourth embodiment, in which the units of radius of curvature, thickness/distance, effective focal length, and effective radius are all millimeter mm.

Face number	Surface type	Radius of curvature	Thickness of (L)	Refractive index	Abbe number	Effective radius
							OBJ	Spherical surface	Infinity is provided	Infinity is provided
S1	Aspherical surface	-16.1109	0.2251	1.54	55.92	1.8542
							S2	Aspherical surface	0.7634	0.3875			1.2798
S3	Aspherical surface	0.8078	0.4229	1.56	37.32	0.8828
							S4	Aspherical surface	1.2845	0.3722			0.5726
STO	Spherical surface	Infinity is provided	0.2014			0.4028
							S5	Aspherical surface	3.5874	0.6637	1.54	55.92	0.6912
S6	Spherical surface	-1.2092	0.1610			0.7848
							S7	Aspherical surface	1.1402	0.2200	1.67	19.24	0.8565
S8	Aspherical surface	0.6665	0.1000			1.1173
							S9	Aspherical surface	3.1093	0.7713	1.54	55.92	1.3195
S10	Aspherical surface	-1.5852	1.0742			1.4649
							S11	Spherical surface	Infinity is provided	0.2100	1.52	64.20	4.0000
S12	Spherical surface	Infinity is provided	0.3904			4.0000
							S13	Spherical surface	Infinity is provided	0.0000

TABLE 4 Table 4

Also shown in table 4 are the object side S11 of the filter, the image side S12 of the filter, and the imaging plane S13.

In this embodiment, the image side surface of the third lens element is a spherical lens element, and the object side surface and the image side surface of the other lens element are aspheric, and the surface shape of each aspheric lens element can be defined by, but not limited to, equation (1) in embodiment one.

Table 5 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in this example.

TABLE 5

Fig. 11 shows a magnification chromatic aberration curve of the optical imaging lens of the fourth embodiment, which represents deviations of different image heights on the imaging plane after light passes through the optical imaging lens. Fig. 12 shows an on-axis chromatic aberration curve of the optical imaging lens of the fourth embodiment, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the optical imaging lens. Fig. 13 shows an astigmatism curve of the optical imaging lens of the fourth embodiment, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 14 shows a distortion curve of the optical imaging lens of the fourth embodiment, which represents distortion magnitude values corresponding to different angles of view.

As can be seen from fig. 11 to 14, the optical imaging lens according to the fourth embodiment can achieve good imaging quality.

Example five

The difference from the fourth embodiment is that parameters of the lens barrel P0 and the spacer are different.

As shown in fig. 15, an optical imaging lens of embodiment five of the present application is described. For brevity, descriptions of parts similar to those of the fourth embodiment will be omitted.

Parameters such as the radius of curvature, the center thickness, etc. of the first to fifth lenses of the optical imaging lens and the distance between the lenses thereof are the same as those of the fourth embodiment, as shown in tables 4 and 5, but at least some of the parameters such as the lens barrel P0, the thickness of the spacer, the inner diameter of the spacer, the outer diameter of the spacer, and the distance between the spacers are different. The imaging quality of the optical imaging lens of the present embodiment is thus as shown in fig. 11 to 14.

As shown in fig. 15, the first lens and the second lens are buckled to form a buckling structure, the first spacer is disposed at the inner side of the buckling structure, and the first lens and the second lens are abutted at the outer side of the buckling structure.

Example six

As shown in fig. 16, an optical imaging lens of embodiment six of the present application is described. For brevity, descriptions of parts similar to those of the fourth embodiment will be omitted.

As shown in fig. 16, the first lens to the third lens are sequentially buckled to form a buckling structure, the first spacers and the second spacers are respectively arranged at the inner sides of the two buckling structures, and two adjacent lenses are abutted at the outer sides of the buckling structures.

Example seven

As shown in fig. 17 to 21, an optical imaging lens of embodiment seven of the present application is described. For brevity, a description of portions similar to those of the first embodiment will be omitted.

As shown in fig. 17, the optical imaging lens includes, in order from an object side to an image side, a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, and a fifth lens E5. Wherein, two adjacent lenses all bear with the spacer of centre gripping in the middle of it, and the internal diameter of first spacer to second spacer reduces gradually, and the internal diameter of second spacer to fourth spacer increases gradually, when guaranteeing camera lens illuminance, limit the propagation path of marginal light to reduce the incidence of light to the non-effective footpath part of lens and produce stray light.

As shown in fig. 17, the first lens element has a negative focal power, the object side surface S1 of the first lens element is concave, the image side surface S2 of the first lens element is concave, the second lens element has a positive focal power, the object side surface S3 of the second lens element is convex, the image side surface S4 of the second lens element is convex, the third lens element has a negative focal power, the object side surface S5 of the third lens element is convex, the image side surface S6 of the third lens element is concave, the fourth lens element has a positive focal power, the object side surface S7 of the fourth lens element is convex, the image side surface S8 of the fourth lens element is convex, the fifth lens element has a negative focal power, 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.

Table 6 shows a basic structural parameter table of an optical imaging lens of the seventh embodiment, in which the units of radius of curvature, thickness/distance, effective focal length, and effective radius are all millimeter mm.

Face number	Surface type	Radius of curvature	Thickness of (L)	Refractive index	Abbe number	Effective radius
							OBJ	Spherical surface	Infinity is provided	Infinity is provided
S1	Aspherical surface	-3.2051	0.4930	1.54	56.11	1.4737
							S2	Aspherical surface	2.8606	0.7642			0.8142
STO	Spherical surface	Infinity is provided	-0.0003			0.4562
							S3	Aspherical surface	2.5522	0.7438	1.54	56.11	0.4728
S4	Aspherical surface	-1.5954	0.2186			0.6385
							S5	Aspherical surface	4.4536	0.2600	1.67	19.24	0.7228
S6	Spherical surface	2.3785	0.0863			0.9711
							S7	Aspherical surface	109.4979	0.9364	1.54	56.11	1.0863
S8	Aspherical surface	-0.6125	0.0300			1.1833
							S9	Aspherical surface	1.4649	0.2800	1.66	20.37	1.5058
S10	Aspherical surface	0.5481	0.5978			1.8883
							S11	Spherical surface	Infinity is provided	0.2100	1.52	64.20	4.0000
S12	Spherical surface	Infinity is provided	0.2662			4.0000
							S13	Spherical surface	Infinity is provided	0.0000

TABLE 6

Also shown in table 6 are the object side S11 of the filter, the image side S12 of the filter, and the imaging plane S13.

Table 7 shows the higher order coefficients that can be used for each aspherical mirror in this example.

Face number

A4

A6

A8

A10

A12

A14

A16

S1

5.8865E-01

-1.0891E+00

2.1483E+00

-3.4279E+00

3.9821E+00

-3.0684E+00

1.2333E+00

S2

1.0254E+00

-5.8603E+00

1.0111E+02

-1.3500E+03

1.2421E+04

-7.9579E+04

3.6240E+05

S3

-5.9221E-02

-1.3787E+01

1.0693E+03

-4.8967E+04

1.4373E+06

-2.8703E+07

4.0327E+08

S4

-3.2811E-01

-1.2600E+01

3.5571E+02

-6.0339E+03

6.8182E+04

-5.3820E+05

3.0452E+06

S5

-8.8247E-01

3.6970E+00

-8.3214E+01

1.3689E+03

-1.5406E+04

1.1914E+05

-6.4785E+05

S6

-2.0844E-01

-5.8163E+00

9.4713E+01

-8.3240E+02

4.7232E+03

-1.8557E+04

5.2318E+04

S7

1.4390E-01

-5.7733E+00

7.3227E+01

-5.1000E+02

2.3115E+03

-7.2941E+03

1.6571E+04

S8

1.4035E+00

-8.8839E+00

4.6646E+01

-1.7845E+02

5.1020E+02

-1.1258E+03

1.9524E+03

S9

-3.0734E-01

-4.4010E+00

3.1077E+01

-1.1374E+02

2.7065E+02

-4.4851E+02

5.3382E+02

S10

-2.3327E+00

6.3379E+00

-1.4178E+01

2.3878E+01

-2.9826E+01

2.7665E+01

-1.9114E+01

Face number

A18

A20

A22

A24

A26

A28

A30

S1

2.1460E-01

-6.5254E-01

4.5409E-01

-1.8092E-01

4.4515E-02

-6.3495E-03

4.0520E-04

S2

-1.1872E+06

2.8031E+06

-4.7242E+06

5.5388E+06

-4.2885E+06

1.9696E+06

-4.0595E+05

S3

-4.0538E+09

2.9272E+10

-1.5049E+11

5.3713E+11

-1.2639E+12

1.7621E+12

-1.1019E+12

S4

-1.2505E+07

3.7305E+07

-7.9951E+07

1.1979E+08

-1.1892E+08

7.0153E+07

-1.8575E+07

S5

2.5207E+06

-7.0619E+06

1.4146E+07

-1.9778E+07

1.8342E+07

-1.0140E+07

2.5294E+06

S6

-1.0758E+05

1.6168E+05

-1.7567E+05

1.3428E+05

-6.8457E+04

2.0883E+04

-2.8821E+03

S7

-2.7521E+04

3.3474E+04

-2.9486E+04

1.8299E+04

-7.5831E+03

1.8819E+03

-2.1139E+02

S8

-2.6593E+03

2.7986E+03

-2.2114E+03

1.2585E+03

-4.8387E+02

1.1201E+02

-1.1753E+01

S9

-4.6238E+02

2.9170E+02

-1.3251E+02

4.2177E+01

-8.9195E+00

1.1247E+00

-6.3952E-02

S10

9.8359E+00

-3.7474E+00

1.0413E+00

-2.0498E-01

2.7074E-02

-2.1517E-03

7.7779E-05

TABLE 7

Fig. 18 shows a magnification chromatic aberration curve of the optical imaging lens of the seventh embodiment, which represents deviations of different image heights on the imaging plane after light passes through the optical imaging lens. Fig. 19 shows an on-axis chromatic aberration curve of the optical imaging lens of the seventh embodiment, which represents a convergent focus deviation of light rays of different wavelengths after passing through the optical imaging lens. Fig. 20 shows an astigmatism curve of the optical imaging lens of the seventh embodiment, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 21 shows a distortion curve of the optical imaging lens of the seventh embodiment, which represents distortion magnitude values corresponding to different angles of view.

As can be seen from fig. 18 to 21, the optical imaging lens according to the seventh embodiment can achieve good imaging quality.

Example eight

The difference from the seventh embodiment is that parameters of the lens barrel P0 and the spacer are different.

As shown in fig. 22, an optical imaging lens of an eighth embodiment of the present application is described. For brevity, descriptions of parts similar to those of the seventh embodiment will be omitted.

Parameters such as the radius of curvature, the center thickness, and the like of the first to fifth lenses of the optical imaging lens and the distance between the lenses thereof are the same as those shown in tables 6 and 7, but at least some of the parameters such as the lens barrel P0, the thickness of the spacer, the inner diameter of the spacer, the outer diameter of the spacer, and the distance between the spacers are different. The imaging quality of the optical imaging lens of the present embodiment is thus as shown in fig. 18 to 21.

As shown in fig. 22, the first lens and the second lens are buckled to form a buckling structure, the first spacer is disposed at the inner side of the buckling structure, and the first lens and the second lens are abutted at the outer side of the buckling structure.

Example nine

As shown in fig. 23, an optical imaging lens of embodiment nine of the present application is described. For brevity, descriptions of parts similar to those of the seventh embodiment will be omitted.

As shown in fig. 23, a fourth auxiliary spacer P4b is further disposed between the fourth lens and the fifth lens, and the object side surface of the fourth auxiliary spacer is supported against the image side surface of the fourth spacer, so that the support stability of the large-level-difference position is improved, the edge-to-thickness ratio of the fourth lens to the fifth lens is also facilitated to be controlled, and the lens molding yield is improved.

In summary, examples one to nine satisfy the relationships shown in table 8, respectively.

Condition/example	1	2	3	4	5	6	7	8	9
										(EP01+EP12)/(f1+f2)	-0.20	-0.20	-0.20	0.87	0.87	0.92	-2.53	-2.57	-2.47
d1s/d2s	1.12	1.20	1.26	2.77	2.77	2.29	1.09	1.07	1.11
										(d1s-d2s)/(f1-f2)	-0.01	-0.02	-0.03	-0.34	-0.34	-0.30	-0.03	-0.02	-0.03
(f2+f3)/(D2m-d2m)	-1.32	-1.38	-0.75	-1.97	-1.97	-1.35	-0.66	-0.67	-0.66
										EP01/CT1-EP12/CT2	0.39	0.55	0.20	2.72	2.72	2.53	1.34	1.30	1.40
d1s/EPD*tan(Semi-FOV)	4.35	4.35	4.88	7.49	7.49	7.49	4.21	3.87	4.22
										f3/f4	-8.22	-8.22	-8.22	-0.60	-0.60	-0.60	-7.10	-7.10	-7.10
d3s/(CT3+T34+CT4)	1.63	1.63	1.63	1.56	1.56	1.56	1.60	1.60	1.63
										(D3m-d3s)/f34	3.01	3.09	3.09	1.37	1.37	1.41	2.79	2.87	2.84
EP23/f3-EP34/f4	-0.55	-0.62	-0.49	0.62	0.61	0.59	-0.56	-0.58	-0.43
										T45/CP4	3.03	2.44	3.03	4.55	3.33	4.55	0.91	0.81	1.67
D4s/R8+D4m/R9	-8.82	-8.97	-8.97	10.09	10.27	10.27	-5.26	-5.45	-5.35
										f4/f5	-0.66	-0.66	-0.66	-1.43	-1.43	-1.43	-0.75	-0.75	-0.75
d4s/(f4-f5)	0.99	1.02	0.95	-0.50	-0.51	-0.51	1.00	1.01	0.92
										d1s/d0s	0.34	0.34	0.38	0.41	0.41	0.41	0.30	0.28	0.30
d4s/d0m	0.42	0.44	0.41	0.40	0.41	0.41	0.43	0.43	0.40
										(d0m-d0s)/EPD	2.47	2.46	2.46	1.33	1.33	1.33	1.71	1.90	1.71
∑AT/∑CP	7.92	7.16	7.92	10.91	9.62	10.91	9.56	9.24	9.90

TABLE 8

Table 9 gives part of parameters of the optical imaging lenses of embodiments one to nine.

TABLE 9

Table 20 gives part of the optical parameters of the first to fifth lenses of the optical imaging lenses of the first to ninth embodiments.

Basic data/embodiment	1	2	3	4	5	6	7	8	9
										f1(mm)	-10.98	-10.98	-10.98	-1.33	-1.33	-1.33	-2.69	-2.69	-2.69
f2(mm)	2.40	2.40	2.40	2.89	2.89	2.89	1.92	1.92	1.92
										f3(mm)	-8.60	-8.60	-8.60	1.74	1.74	1.74	-7.94	-7.94	-7.94
f4(mm)	1.05	1.05	1.05	-2.92	-2.92	-2.92	1.12	1.12	1.12
										f5(mm)	-1.59	-1.59	-1.59	2.04	2.04	2.04	-1.50	-1.50	-1.50
f34(mm)	1.13	1.13	1.13	2.77	2.77	2.77	1.21	1.21	1.21
										f(mm)	1.47	1.47	1.47	1.42	1.42	1.42	1.35	1.35	1.35
Semi-FOV(°)	61.69	61.69	61.69	61.86	61.86	61.86	62.23	62.23	62.23

Table 20

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

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the 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 in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated 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 the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. 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:

the lens group comprises first to fifth lenses which are arranged at intervals in sequence from the object side to the image side of the optical imaging lens, wherein the first lens has negative focal power, the object side of the first lens is concave, the second lens has positive focal power, the object side of the third lens is convex, and the object side of the fifth lens is convex;

a plurality of spacers, the plurality of spacers being located on and at least partially in contact with the image side of the first lens, the plurality of spacers being located on and at least partially in contact with the image side of the second lens, the second spacers having an inner diameter that is smallest among the inner diameters of the object sides of all of the plurality of spacers, the second spacers having an inner diameter that is smallest among the inner diameters of the image sides of all of the plurality of spacers;

A lens barrel in which the lens group and the plurality of spacers are accommodated;

wherein, half of the half-FOV of the maximum field angle of the optical imaging lens satisfies: 60 ° < Semi-FOV <70 °;

the distance EP01 between the object side end surface of the lens barrel and the object side surface of the first spacer along the optical axis direction of the optical imaging lens, the distance EP12 between the image side surface of the first spacer and the object side surface of the second spacer along the optical axis direction, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy:

-3<(EP01+EP12)/(f1+f2)<1。

2. the optical imaging lens according to claim 1, wherein an inner diameter d1s of the object side surface of the first spacer and an inner diameter d2s of the object side surface of the second spacer satisfy: 1< d1s/d2s <3, the inner diameter d1s of the object side surface of the first spacer, the inner diameter d2s of the object side surface of the second spacer, the effective focal length f1 of the first lens, and the effective focal length f2 of the second lens satisfy the following conditions: -0.5< (d 1s-d2 s)/(f 1-f 2) <0.

3. The optical imaging lens of claim 1, wherein an effective focal length f2 of the second lens, an effective focal length f3 of the third lens, an outer diameter D2m of an image side surface of the second spacer, and an inner diameter D2m of the image side surface of the second spacer satisfy: -3< (f2+f3)/(D2 m-D2 m) <2.

4. The optical imaging lens according to claim 1, wherein a distance EP01 between an object side end surface of the lens barrel and an object side surface of the first spacer in the optical axis direction, a center thickness CT1 of the first lens, a distance EP12 between an image side surface of the first spacer and an object side surface of the second spacer in the optical axis direction, a center thickness CT2 of the second lens satisfy: 0< EP01/CT1-EP12/CT2<3.

5. The optical imaging lens of claim 1, wherein an inner diameter d1s of an object side surface of the first spacer, an entrance pupil diameter EPD of the optical imaging lens, and a half of a maximum field angle Semi-FOV of the optical imaging lens satisfy: 3< d1s/EPD tan (Semi-FOV) <8.

6. The optical imaging lens as claimed in claim 1, wherein a third spacer is located on an image side of the third lens and at least partially contacts the image side of the third lens, and the optical power of the third lens and the optical power of the fourth lens are opposite in sign, and the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy: -9< f3/f4<0, the inner diameter d3s of the object side of the third spacer, the central thickness CT3 of the third lens, the on-axis distance T34 of the image side of the third lens to the object side of the fourth lens, the central thickness CT4 of the fourth lens satisfying between: 1< d3 s/(CT3+T34+CT4) <2.

7. The optical imaging lens of claim 1, wherein a third spacer is located on and at least partially contacting an image side of the third lens in the plurality of spacers, and an outer diameter D3m of the image side of the third spacer, an inner diameter D3s of the object side of the third spacer, and a combined focal length f34 of the third lens and the fourth lens satisfy: 1< (D3 m-D3 s)/f 34<4.

8. The optical imaging lens according to claim 1, wherein among the plurality of spacers, a third spacer is located on an image side of the third lens and is at least partially in contact with an image side of the third lens, a fourth spacer is located on an image side of the fourth lens and is at least partially in contact with an image side of the fourth lens, a distance EP23 from an image side of the second spacer to an object side of the third spacer in the optical axis direction, an effective focal length f3 of the third lens, a distance EP34 from an image side of the third spacer to an object side of the fourth spacer in the optical axis direction, and an effective focal length f4 of the fourth lens satisfy: -1< EP23/f3-EP34/f4<1.

9. The optical imaging lens as claimed in claim 1, wherein the plurality of spacers are fourth spacers located on the image side of the fourth lens and at least partially in contact with the image side of the fourth lens, an on-axis distance from the image side of the fourth lens to the object side of the fifth lens is smallest among on-axis distances from any two adjacent lenses in the lens group, and an on-axis distance T45 from the image side of the fourth lens to the object side of the fifth lens and a maximum thickness CP4 of the fourth spacers satisfy: 0< T45/CP4<5, the outer diameter D4s of the object side surface of the fourth spacer, the curvature radius R8 of the image side surface of the fourth lens, the outer diameter D4m of the image side surface of the fourth spacer, and the curvature radius R9 of the object side surface of the fifth lens satisfy the following conditions: -10< D4s/R8+D4m/R9<11.

10. The optical imaging lens as claimed in claim 1, wherein a fourth spacer is located on an image side of a fourth lens and is at least partially in contact with the image side of the fourth lens, and an optical power of the fifth lens is opposite to a positive sign of the optical power of the fourth lens, and an effective focal length f4 of the fourth lens and an effective focal length f5 of the fifth lens satisfy: -2< f4/f5<0, the inner diameter d4s of the object side of the fourth spacer, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens satisfying: -1< d4 s/(f 4-f 5) <2.