CN113960754A

CN113960754A - Optical imaging lens

Info

Publication number: CN113960754A
Application number: CN202111250884.2A
Authority: CN
Inventors: 吕赛锋; 何旦; 赵烈烽; 戴付建
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2022-01-21
Anticipated expiration: 2041-10-26
Also published as: CN113960754B

Abstract

The invention provides an optical imaging lens. The optical imaging lens sequentially comprises from an object side to an image side along an optical axis: a first lens; the object side surface of the second lens is a concave surface; a third lens; a fourth lens; a fifth lens; the image side surface of the sixth lens is a convex surface; wherein, the maximum field angle FOV of the optical imaging lens satisfies: 100 ° < FOV <180 °; the distance BFL from the image side surface of the sixth lens to the imaging surface on the optical axis satisfies the following condition: BFL is greater than 1.9 mm; the air interval T12 of the first lens and the second lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy that: 1.5< T12/CT3< 3.5. The invention solves the problem that the optical imaging lens in the prior art has large image plane, large field angle and miniaturization which are difficult to be simultaneously considered.

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 rapid development of consumer electronic terminal devices such as smart phones, the competition in the field of optical imaging lenses with high imaging quality is becoming more and more intense. The types of optical imaging lenses are various, taking a mobile phone lens as an example, along with the continuous upgrading of the camera shooting effect of each terminal on the mobile phone lens, the optical imaging lens matched with the electronic photosensitive element is also continuously upgraded and updated. Mobile phone manufacturers have made higher demands on various performances of the mobile phone lens design process. The prior art provides an optical imaging lens which can satisfy a large image plane and a large field angle, but the lens itself has a large volume and is difficult to satisfy the requirement of miniaturization.

That is, the optical imaging lens in the prior art has the problem that the large image plane, the large field angle and the miniaturization are difficult to be simultaneously 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 is difficult to simultaneously consider large image plane, large field angle and miniaturization.

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 along an optical axis: a first lens; the object side surface of the second lens is a concave surface; a third lens; a fourth lens; a fifth lens; the image side surface of the sixth lens is a convex surface; wherein, the maximum field angle FOV of the optical imaging lens satisfies: 100 ° < FOV <180 °; the distance BFL from the image side surface of the sixth lens to the imaging surface on the optical axis satisfies the following condition: BFL is greater than 1.9 mm; the air interval T12 of the first lens and the second lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy that: 1.5< T12/CT3< 3.5.

Further, a combined focal length f12 of the first lens and the second lens and a combined focal length f34 of the third lens and the fourth lens satisfy: -1.0< f34/f12 <0.

Further, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, and the combined focal length f3456 of the third lens, the fourth lens, the fifth lens, and the sixth lens satisfy: 0< f3456/(f4+ f5+ f6) < 1.0.

Further, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, and the combined focal length f234 of the second lens, the third lens, and the fourth lens satisfy: 0< f234/(f3-f4-f5) < 1.0.

Further, a center thickness CT4 of the fourth lens on the optical axis and a maximum effective radius DT41 of an object side surface of the fourth lens satisfy: 0< CT4/DT41< 1.0.

Further, the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT21 of the object side surface of the second lens satisfy: 0< DT21/DT11< 1.0.

Further, a distance BFL between an image-side surface of the sixth lens element and the image plane on the optical axis and a total thickness Σ CT between the first lens element and the sixth lens element on the optical axis satisfy: 0< BFL/sigma CT < 1.0.

Further, the edge thickness ET1 of the first lens, the edge thickness ET2 of the second lens, the edge thickness ET5 of the fifth lens and the edge thickness ET6 of the sixth lens satisfy: 0.7< (ET1+ ET2)/(ET5+ ET6) < 1.2.

Further, an on-axis distance SAG11 between an intersection point of the object-side surface of the first lens and the optical axis to an effective radius vertex of the object-side surface of the first lens and 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 satisfy: 0.3< SAG11/SAG12< 0.8.

Further, 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, an on-axis distance SAG51 between an intersection point of the object-side surface of the fifth lens and the effective radius vertex of the object-side surface of the fifth lens, and an on-axis distance SAG62 between an intersection point of the image-side surface of the sixth lens and the optical axis to the effective radius vertex of the image-side surface of the sixth lens satisfy: 0< SAG62/(SAG42+ SAG51) < 1.0.

Further, the refractive index N2 of the second lens, the refractive index N3 of the third lens and the refractive index N5 of the fifth lens satisfy: (N2+ N3+ N5)/3> 1.6.

Further, the abbe number V1 of the first lens, the abbe number V2 of the second lens, the abbe number V3 of the third lens and the abbe number V5 of the fifth lens satisfy: v2+ V5< V1+ V3.

Further, the radius of curvature R1 of the object-side surface of the first lens, the radius of curvature R2 of the image-side surface of the first lens, and the effective focal length f1 of the first lens satisfy: -1.0< (R1+ R2)/f1< 0.

Further, a curvature radius R3 of the object-side surface of the second lens, a curvature radius R4 of the image-side surface of the second lens, a curvature radius R7 of the object-side surface of the fourth lens, and a curvature radius R8 of the image-side surface of the fourth lens satisfy: 0.3< (R3+ R4)/(R8-R7) < 1.3.

Further, a radius of curvature R9 of the object-side surface of the fifth lens, a radius of curvature R11 of the object-side surface of the sixth lens, and a radius of curvature R12 of the image-side surface of the sixth lens satisfy: -1.5< (R9-R12)/R11< 0.

Furthermore, the first lens has negative focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; and/or the image side surface of the second lens is convex.

Furthermore, the third lens has positive focal power, and the image side surface of the third lens is a convex surface; and/or the fourth lens has positive focal power, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface.

Furthermore, the fifth lens has negative focal power, the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a concave surface; and/or the sixth lens has positive focal power, and the object side surface of the sixth lens is a convex surface.

Further, the material of the first lens to the sixth lens includes one or more of glass and plastic.

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 along an optical axis: a first lens; the object side surface of the second lens is a concave surface; a third lens; a fourth lens; a fifth lens; the image side surface of the sixth lens is a convex surface; wherein, the maximum field angle FOV of the optical imaging lens satisfies: 100 ° < FOV <180 °; the distance BFL from the image side surface of the sixth lens to the imaging surface on the optical axis satisfies the following condition: BFL is greater than 1.9 mm; the distance BFL from the image side surface of the sixth lens to the imaging surface on the optical axis and the thickness sum Sigma CT of the first lens to the sixth lens on the optical axis respectively satisfy that: 0< BFL/sigma CT < 1.0.

Further, an air interval T12 of the first lens and the second lens on the optical axis and a center thickness CT3 of the third lens on the optical axis satisfy: 1.5< T12/CT3< 3.5; the combined focal length f12 of the first lens and the second lens and the combined focal length f34 of the third lens and the fourth lens satisfy that: -1.0< f34/f12 <0.

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, a fifth lens and a sixth lens from an object side to an image side along an optical axis, wherein the object side surface of the second lens is a concave surface; the image side surface of the sixth lens is a convex surface; wherein, the maximum field angle FOV of the optical imaging lens satisfies: 100 ° < FOV <180 °; the distance BFL from the image side surface of the sixth lens to the imaging surface on the optical axis satisfies the following condition: BFL is greater than 1.9 mm; the air interval T12 of the first lens and the second lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy that: 1.5< T12/CT3< 3.5.

The aberration generated by the optical imaging lens is balanced by reasonably distributing the surface types of the lenses, and the imaging quality of the optical imaging lens is greatly improved. The maximum field angle FOV of the optical imaging lens is reasonably restricted, so that the characteristic of ensuring the large field angle of the optical imaging lens is facilitated. Distance BFL from the image side face of the sixth lens to the imaging face on the optical axis is reasonably restrained, the ratio of air space T12 of the first lens and the second lens on the optical axis to center thickness CT3 of the third lens on the optical axis is in a reasonable range, on the basis that the optical imaging lens is guaranteed to have better imaging quality, the detectable range of the system is enlarged, the size of the whole optical imaging lens is reduced, the reduction of the caliber of the first lens of the optical system is facilitated, and meanwhile, on the basis that the caliber of the sixth lens is guaranteed, the size of BFL is enlarged, and the photosensitive area of the system is enlarged.

In addition, the optical imaging lens has the advantages of large image surface, low sensitivity, miniaturization and large field angle.

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

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

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

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

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

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

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

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

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

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

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

fig. 25 is a schematic structural view showing an optical imaging lens of example seven of the present invention;

fig. 26 to 28 show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens in fig. 25, respectively;

fig. 29 is a schematic structural view showing an optical imaging lens of example eight of the present invention;

fig. 30 to 32 show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens in fig. 29, respectively;

fig. 33 is a schematic view showing a configuration of an optical imaging lens of example nine of the present invention;

fig. 34 to 36 show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens in fig. 33, 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, sixth lens; s11, the object-side surface of the sixth lens element; s12, an image side surface of the sixth lens element; e7, optical filters; s13, the object side surface of the optical filter; s14, the image side surface of the optical filter; and S15, 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 optical imaging lens in the prior art has large image plane, large field angle and small size which are difficult to be simultaneously considered.

Example one

As shown in fig. 1 to 36, the optical imaging lens includes, in order from an object side to an image side along an optical axis, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element, where an object-side surface of the second lens element is a concave surface; the image side surface of the sixth lens is a convex surface; wherein, the maximum field angle FOV of the optical imaging lens satisfies: 100 ° < FOV <180 °; the distance BFL from the image side surface of the sixth lens to the imaging surface on the optical axis satisfies the following condition: BFL is greater than 1.9 mm; the air interval T12 of the first lens and the second lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy that: 1.5< T12/CT3< 3.5.

Preferably 109 ° < FOV <130 °.

Preferably, 1.6< T12/CT3< 2.2.

In the present embodiment, a combined focal length f12 of the first lens and the second lens and a combined focal length f34 of the third lens and the fourth lens satisfy: -1.0< f34/f12 <0. Satisfying the conditional expression is beneficial to increasing the detectable range and increasing the depth of field. Preferably, -0.8< f34/f12< -0.4.

In the present embodiment, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, and the combined focal length f3456 of the third lens, the fourth lens, the fifth lens, and the sixth lens satisfy: 0< f3456/(f4+ f5+ f6) < 1.0. After the detectable range is enlarged, the light ray deflection is aggravated, and the trend of the light ray deflection can be slowed down through reasonably distributing the effective focal lengths of the fourth lens and the sixth lens, so that the sensitivity is reduced. Preferably, 0.3< f3456/(f4+ f5+ f6) < 0.8.

In the present embodiment, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, and the combined focal length f234 of the second lens, the third lens, and the fourth lens satisfy: 0< f234/(f3-f4-f5) < 1.0. Because the detectable scope is enlarged, the light deflection can be aggravated, and the trend of the light deflection can be slowed down through reasonably distributing the effective focal lengths of the second lens, the third lens, the fourth lens and the fifth lens, so that the sensitivity is reduced. Preferably 0.3< f234/(f3-f4-f5) < 0.5.

In the present embodiment, the central thickness CT4 of the fourth lens on the optical axis and the maximum effective radius DT41 of the object side surface of the fourth lens satisfy: 0< CT4/DT41< 1.0. The condition is satisfied, the light height is reduced, and the miniaturization of the aperture of the optical imaging lens is guaranteed. Preferably 0.7< CT4/DT41< 0.9.

In the present embodiment, the maximum effective radius DT11 of the object-side surface of the first lens and the maximum effective radius DT21 of the object-side surface of the second lens satisfy: 0< DT21/DT11< 1.0. The condition is satisfied, which is beneficial to increasing the detectable range of the system and the angle of the visual field. Preferably 0.5< DT21/DT11< 0.7.

In this embodiment, a distance BFL between the image-side surface of the sixth lens element and the image plane on the optical axis and a total thickness Σ CT between the first lens element and the sixth lens element on the optical axis satisfy: 0< BFL/sigma CT < 1.0. The ratio of the distance BFL from the image side surface of the sixth lens to the imaging surface on the optical axis to the sum of the thicknesses sigma CT of the first lens to the sixth lens on the optical axis is in a reasonable range, so that the thicknesses of the lenses are favorably distributed, the processing characteristics of the lenses are favorably ensured, and the BFL is increased. Preferably, 0.5< BFL/sigma CT < 1.0.

In the present embodiment, the edge thicknesses ET1, ET2, ET5 of the first lens, ET6 of the second lens and the sixth lens satisfy: 0.7< (ET1+ ET2)/(ET5+ ET6) < 1.2. Satisfying the condition is beneficial to reasonably distributing the edge thickness among the lenses, ensuring the processing property of the lenses and ensuring the processing procedure. Preferably, 0.8< (ET1+ ET2)/(ET5+ ET6) < 1.1.

In this embodiment, the on-axis distance SAG11 between the intersection point of the object-side surface of the first lens and the optical axis to the effective radius vertex of the object-side surface of the first lens and 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 satisfy: 0.3< SAG11/SAG12< 0.8. Satisfying this conditional expression, being favorable to restricting the lens structure of first lens, on the basis of increase visual field angle, ensuring the processing rationality of first lens. Preferably 0.5< SAG11/SAG12< 0.7.

In the present embodiment, 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, the on-axis distance SAG51 between the intersection point of the object-side surface of the fifth lens and the effective radius vertex of the object-side surface of the fifth lens, and the on-axis distance SAG62 between the intersection point of the image-side surface of the sixth lens and the optical axis to the effective radius vertex of the image-side surface of the sixth lens satisfy: 0< SAG62/(SAG42+ SAG51) < 1.0. The lens processing performance is ensured by reasonably distributing the rise of each lens, and on the other hand, the calibers of the fourth lens, the fifth lens and the sixth lens are reduced, so that the BFL is increased. Preferably, 0.3< SAG62/(SAG42+ SAG51) < 0.7.

In the present embodiment, the refractive index N2 of the second lens, the refractive index N3 of the third lens, and the refractive index N5 of the fifth lens satisfy: (N2+ N3+ N5)/3> 1.6. Through the refractive indexes of the second lens, the third lens and the fifth lens, the aberration of the system can be reasonably improved, and the imaging quality of the system can be improved. Preferably, 1.6< (N2+ N3+ N5)/3< 1.7.

In the present embodiment, the abbe number V1 of the first lens, the abbe number V2 of the second lens, the abbe number V3 of the third lens, and the abbe number V5 of the fifth lens satisfy: v2+ V5< V1+ V3. By distributing the dispersion coefficients of the lenses, the chromatic aberration of the system is improved.

In the present embodiment, the radius of curvature R1 of the object-side surface of the first lens, the radius of curvature R2 of the image-side surface of the first lens, and the effective focal length f1 of the first lens satisfy: -1.0< (R1+ R2)/f1< 0. Satisfying this conditional expression is advantageous for increasing the angle of field of view of the system, while the workability of the first lens can be ensured by reasonably distributing the radius of curvature of the first lens. Preferably, -0.9< (R1+ R2)/f1< -0.5.

In the present embodiment, the radius of curvature R3 of the object-side surface of the second lens, the radius of curvature R4 of the image-side surface of the second lens, the radius of curvature R7 of the object-side surface of the fourth lens, and the radius of curvature R8 of the image-side surface of the fourth lens satisfy: 0.3< (R3+ R4)/(R8-R7) < 1.3. By limiting the curvature radius of the second lens and the curvature radius of the fourth lens, the imaging quality of the system is improved. Preferably, 0.5< (R3+ R4)/(R8-R7) < 1.0.

In the present embodiment, the radius of curvature R9 of the object-side surface of the fifth lens, the radius of curvature R11 of the object-side surface of the sixth lens, and the radius of curvature R12 of the image-side surface of the sixth lens satisfy: -1.5< (R9-R12)/R11< 0. The conditional expression is satisfied, the calibers of the fifth lens and the sixth lens are reduced, the BFL of the system is increased, and the miniaturization of the system is guaranteed. Preferably, -1.3< (R9-R12)/R11< -0.2.

In this embodiment, the first lens element has a negative refractive power, the object-side surface of the first lens element is a convex surface, and the image-side surface of the first lens element is a concave surface; and the image side surface of the second lens is convex. This arrangement is advantageous for increasing the field angle of the system.

In this embodiment, the third lens element has positive refractive power, and the image-side surface of the third lens element is convex; and the fourth lens has positive focal power, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface. The light deflection of the system is favorably slowed down, and the sensitivity is reduced.

In this embodiment, the fifth lens element has negative refractive power, the object-side surface of the fifth lens element is concave, and the image-side surface of the fifth lens element is concave; and the sixth lens has positive focal power, and the object side surface of the sixth lens is a convex surface. Therefore, the aperture of the fifth lens and the aperture of the sixth lens are reduced, the BFL of the system is increased, and the miniaturization of the system is ensured.

In this embodiment, the material of the first lens element to the sixth lens element includes one or more of glass and plastic. The optical imaging lens in the application can be a system mixed by glass and plastic, and the material of the lens can be selected according to actual conditions.

Example two

As shown in fig. 1 to 36, the optical imaging lens includes, in order from an object side to an image side along an optical axis, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element, where an object-side surface of the second lens element is a concave surface; the image side surface of the sixth lens is a convex surface; wherein, the maximum field angle FOV of the optical imaging lens satisfies: 100 ° < FOV <180 °; the distance BFL from the image side surface of the sixth lens to the imaging surface on the optical axis satisfies the following condition: BFL is greater than 1.9 mm; the distance BFL from the image side surface of the sixth lens to the imaging surface on the optical axis and the thickness sum Sigma CT of the first lens to the sixth lens on the optical axis respectively satisfy that: 0< BFL/sigma CT < 1.0.

Preferably 109 ° < FOV <130 °.

Preferably, 0.5< BFL/sigma CT < 1.0.

The aberration generated by the optical imaging lens is balanced by reasonably distributing the surface types of the lenses, and the imaging quality of the optical imaging lens is greatly improved. The maximum field angle FOV of the optical imaging lens is reasonably restricted, so that the characteristic of ensuring the large field angle of the optical imaging lens is facilitated. The ratio of the distance BFL from the image side surface of the sixth lens to the imaging surface on the optical axis to the sum of the thicknesses sigma CT of the first lens to the sixth lens on the optical axis is in a reasonable range, so that the thicknesses of the lenses are favorably distributed, the processing characteristics of the lenses are favorably ensured, and the BFL is increased. This application is on the basis of guaranteeing that optical imaging lens has better imaging quality, and the detectable scope of increase system reduces whole optical imaging lens's volume, is favorable to reducing optical system's the bore of first lens, and on the basis of guaranteeing the bore of sixth lens, through increaseing BFL size, the photosensitive zone of increase system simultaneously.

In the present embodiment, the air interval T12 of the first lens and the second lens on the optical axis and the center thickness CT3 of the third lens on the optical axis satisfy: 1.5< T12/CT3< 3.5. Satisfying this conditional expression, on the basis of guaranteeing that optical imaging lens has better image quality, increasing the detectable scope of system, reducing the volume of whole optical imaging lens, be favorable to reducing optical system's the bore of first lens, on the basis of guaranteeing the bore of sixth lens simultaneously, through increaseing BFL size, increase system's photosensitive zone. Preferably, 1.6< T12/CT3< 2.2.

In the present embodiment, a combined focal length f12 of the first lens and the second lens and a combined focal length f34 of the third lens and the fourth lens satisfy: -1.0< f34/f12 <0. Satisfying the conditional expression is beneficial to increasing the detectable range and increasing the depth of field. Preferably, -0.8< f34/f12< -0.4. Satisfying the conditional expression is beneficial to increasing the detectable range and increasing the depth of field. Preferably, -0.8< f34/f12< -0.4.

The above-described optical imaging lens may further optionally include a filter for correcting color deviation 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, the above-mentioned six 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 large aperture and large field angle. The advantages of ultra-thin and good imaging quality can meet the miniaturization requirement of intelligent electronic products.

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

However, it will be appreciated by those skilled in the art that the number of lenses constituting an optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although six lenses are exemplified in the embodiment, the optical imaging lens is not limited to include six 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 nine is applicable to all embodiments of the present application.

Example one

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

As shown in fig. 1, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

The first lens element E1 has negative power, and the object-side surface S1 of the first lens element is convex and the image-side surface S2 of the first lens element is concave. The second lens element E2 has negative power, and the object-side surface S3 of the second lens element is concave, and the image-side surface S4 of the second lens element is convex. The third lens element E3 has positive refractive power, and the object-side surface S5 and the image-side surface S6 of the third lens element are convex. The fourth lens element E4 has positive refractive power, and the object-side surface S7 and the image-side surface S8 of the fourth lens element are convex. The fifth lens E5 has negative power, and the object-side surface S9 of the fifth lens is concave, and the image-side surface S10 of the fifth lens is concave. The sixth lens element E6 has positive refractive power, and has a convex object-side surface S11 and a convex image-side surface S12. The filter E7 has an object side surface S13 of the filter and an image side surface S14 of the filter. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

In this example, the total effective focal length f of the optical imaging lens is 2.35mm, the total length TTL of the optical imaging lens is 7.81mm, and the image height ImgH is 3.13 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 sixth lens element E6 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-S12 in example one.

TABLE 2

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

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

Example two

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

As shown in fig. 5, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

In this example, the total effective focal length f of the optical imaging lens is 2.35mm, the total length TTL of the optical imaging lens is 7.81mm, and the image height ImgH is 3.14 mm.

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

TABLE 3

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

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

-4.7604E-01

2.8239E-02

-5.4577E-04

6.4738E-04

1.9214E-05

7.7965E-07

1.5663E-08

S2

7.5115E-02

-6.1143E-03

-6.9018E-03

-2.8769E-03

-8.3854E-04

-2.8451E-04

-1.4222E-04

S3

1.9937E-02

-9.4686E-03

1.1180E-03

4.1049E-04

1.3916E-05

0.0000E+00

S4

3.4651E-02

-7.5277E-03

1.0203E-03

8.4651E-05

8.6294E-07

0.0000E+00

S5

3.4768E-02

-2.4157E-03

1.5106E-04

-2.4161E-05

0.0000E+00

S6

1.9184E-02

2.0711E-03

-6.9137E-04

-6.3056E-05

0.0000E+00

S7

4.8696E-03

-4.1272E-03

2.0300E-04

-1.9601E-04

-5.4258E-06

0.0000E+00

S8

4.9705E-03

-1.4804E-02

5.1938E-03

-8.8946E-04

-2.4273E-05

-1.0612E-06

0.0000E+00

S9

-7.3043E-03

-1.2250E-02

4.2288E-03

-3.4253E-04

-8.2619E-06

-3.6187E-07

0.0000E+00

S10

-4.2671E-02

1.8514E-02

-2.5297E-03

2.6908E-04

2.4489E-06

0.0000E+00

S11

-1.2419E-01

2.9319E-02

-6.5205E-03

6.5714E-04

2.2090E-06

0.0000E+00

S12

1.2906E-01

1.2167E-02

-4.9192E-04

-7.9956E-04

-2.1209E-05

-7.8280E-07

0.0000E+00

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

0.0000E+00

S2

-4.1608E-05

-2.7909E-05

-1.8496E-07

-5.1117E-06

4.3800E-06

1.5873E-06

1.5649E-05

S3

0.0000E+00

S4

0.0000E+00

S5

0.0000E+00

S6

0.0000E+00

S7

0.0000E+00

S8

0.0000E+00

S9

0.0000E+00

S10

0.0000E+00

S11

0.0000E+00

S12

0.0000E+00

TABLE 4

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

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

Example III

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

As shown in fig. 9, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

The first lens element E1 has negative power, and the object-side surface S1 of the first lens element is convex and the image-side surface S2 of the first lens element is concave. The second lens element E2 has positive refractive power, and the object-side surface S3 of the second lens element is concave, and the image-side surface S4 of the second lens element is convex. The third lens element E3 has positive refractive power, and the object-side surface S5 and the image-side surface S6 of the third lens element are convex. The fourth lens element E4 has positive refractive power, and the object-side surface S7 and the image-side surface S8 of the fourth lens element are convex. The fifth lens E5 has negative power, and the object-side surface S9 of the fifth lens is concave, and the image-side surface S10 of the fifth lens is concave. The sixth lens element E6 has positive refractive power, and has a convex object-side surface S11 and a convex image-side surface S12. The filter E7 has an object side surface S13 of the filter and an image side surface S14 of the filter. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

In this example, the total effective focal length f of the optical imaging lens is 2.45mm, the total length TTL of the optical imaging lens is 7.81mm, and the image height ImgH is 3.02 mm.

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

TABLE 5

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

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

-5.9938E-01

3.4070E-02

3.1032E-03

-4.6466E-04

-2.5851E-05

-2.0903E-06

-1.8262E-07

S2

4.9222E-02

-1.0007E-02

-6.7273E-03

-2.4148E-03

-7.6928E-04

-2.6782E-04

-1.3658E-04

S3

2.0011E-02

-1.1711E-02

4.3292E-04

3.9288E-04

1.1577E-05

0.0000E+00

S4

9.4252E-02

-6.0465E-03

1.8527E-03

2.4583E-04

3.4426E-06

0.0000E+00

S5

4.6904E-02

-1.5471E-03

8.2490E-04

-4.6836E-05

3.6503E-08

0.0000E+00

S6

2.0097E-02

1.3789E-03

9.8628E-04

2.3386E-05

0.0000E+00

S7

3.6150E-02

-1.1458E-02

5.7447E-04

-2.5196E-04

-2.8972E-06

-4.8589E-08

0.0000E+00

S8

6.5658E-02

-9.9265E-03

2.5464E-03

-4.7067E-04

-2.0841E-05

-1.4561E-06

0.0000E+00

S9

5.5188E-02

-6.6236E-03

7.6636E-03

-1.0998E-03

-3.5184E-05

-1.8797E-06

0.0000E+00

S10

5.7092E-04

1.5143E-02

3.4157E-04

-2.2148E-04

-1.9312E-06

0.0000E+00

S11

-1.2107E-01

3.1319E-02

-5.6300E-03

1.8610E-04

-1.2141E-07

0.0000E+00

S12

7.8978E-02

1.7705E-02

-2.5887E-03

-1.1827E-03

-3.0639E-05

-1.0751E-06

-4.8543E-08

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

0.0000E+00

S2

-4.1698E-05

-2.9960E-05

-4.4609E-06

-1.0248E-05

-2.0896E-06

-5.2975E-06

1.1228E-05

S3

0.0000E+00

S4

0.0000E+00

S5

0.0000E+00

S6

0.0000E+00

S7

0.0000E+00

S8

0.0000E+00

S9

0.0000E+00

S10

0.0000E+00

S11

0.0000E+00

S12

0.0000E+00

TABLE 6

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

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

Example four

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

As shown in fig. 13, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

In this example, the total effective focal length f of the optical imaging lens is 2.45mm, the total length TTL of the optical imaging lens is 7.81mm, and the image height ImgH is 2.99 mm.

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

TABLE 7

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

TABLE 8

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

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

Example five

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

As shown in fig. 17, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

The first lens element E1 has negative power, and the object-side surface S1 of the first lens element is convex and the image-side surface S2 of the first lens element is concave. The second lens element E2 has negative power, and the object-side surface S3 of the second lens element is concave, and the image-side surface S4 of the second lens element is convex. The third lens element E3 has positive refractive power, and the object-side surface S5 of the third lens element is concave, and the image-side surface S6 of the third lens element is convex. The fourth lens element E4 has positive refractive power, and the object-side surface S7 and the image-side surface S8 of the fourth lens element are convex. The fifth lens E5 has negative power, and the object-side surface S9 of the fifth lens is concave, and the image-side surface S10 of the fifth lens is concave. The sixth lens element E6 has positive refractive power, and has a convex object-side surface S11 and a convex image-side surface S12. The filter E7 has an object side surface S13 of the filter and an image side surface S14 of the filter. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

In this example, the total effective focal length f of the optical imaging lens is 2.55mm, the total length TTL of the optical imaging lens is 7.81mm, and the image height ImgH is 3.06 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 one above.

Watch 10

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

As can be seen from fig. 18 to 20, the optical imaging lens according to example five can achieve good imaging quality.

Example six

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

As shown in fig. 21, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

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 of the aspherical mirror surfaces in example six, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

TABLE 12

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

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

Example seven

As shown in fig. 25 to 28, an optical imaging lens of example seven of the present application is described. Fig. 25 shows a schematic diagram of an optical imaging lens structure of example seven.

As shown in fig. 25, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

Table 13 shows a basic structural parameter table of the optical imaging lens of example seven, in which the units of the radius of curvature, the thickness/distance, the focal length, and the effective radius are all millimeters (mm).

Watch 13

Table 14 shows the high-order term coefficients that can be used for each of the aspherical mirror surfaces in example seven, wherein each of the aspherical mirror surface types can be defined by formula (1) given in example one above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

-4.6821E-01

9.4060E-03

4.1248E-03

-1.5673E-04

-2.0821E-06

-1.4275E-08

0.0000E+00

S2

1.9394E-02

-1.5928E-02

-6.5646E-03

-2.2374E-03

-6.8270E-04

-2.1061E-04

-7.3062E-05

S3

3.9325E-02

-5.2205E-03

-4.7362E-04

-1.5729E-05

-3.6927E-07

0.0000E+00

S4

8.2549E-02

2.6464E-04

6.8233E-04

6.7602E-05

1.6775E-06

0.0000E+00

S5

2.7966E-02

1.4420E-03

3.6663E-04

-9.2974E-05

2.4998E-07

0.0000E+00

S6

-1.3681E-02

1.8631E-03

2.5560E-04

-9.8594E-05

0.0000E+00

S7

5.1944E-02

-4.9969E-03

7.7421E-04

-1.7429E-04

-4.8132E-06

0.0000E+00

S8

3.3671E-02

4.8194E-04

3.0120E-03

-3.6025E-04

-6.9508E-06

0.0000E+00

S9

1.9324E-01

-1.1024E-02

3.9160E-03

-2.3011E-04

-1.1687E-05

-8.4312E-07

0.0000E+00

S10

1.3725E-01

8.4694E-03

-1.4485E-03

2.4548E-04

2.9807E-06

5.0414E-08

0.0000E+00

S11

-2.1644E-01

3.5866E-02

-2.1875E-03

-5.5815E-04

-1.3196E-07

0.0000E+00

S12

9.9039E-03

2.1219E-02

7.2033E-04

-1.5900E-03

-1.8899E-05

-3.9179E-07

-1.6230E-08

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

0.0000E+00

S2

-5.7337E-06

-7.0549E-07

6.5569E-06

-2.5708E-06

-2.5275E-06

-6.9515E-06

2.8910E-06

S3

0.0000E+00

S4

0.0000E+00

S5

0.0000E+00

S6

0.0000E+00

S7

0.0000E+00

S8

0.0000E+00

S9

0.0000E+00

S10

0.0000E+00

S11

0.0000E+00

S12

0.0000E+00

TABLE 14

Fig. 26 shows an on-axis chromatic aberration curve of the optical imaging lens of example seven, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the optical imaging lens. Fig. 27 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the optical imaging lens of example seven. Fig. 28 shows distortion curves of the optical imaging lens of example seven, which represent distortion magnitude values corresponding to different angles of view.

As can be seen from fig. 26 to 28, the optical imaging lens according to example seven can achieve good imaging quality.

Example eight

As shown in fig. 29 to 32, an optical imaging lens of example eight of the present application is described. Fig. 29 shows a schematic diagram of an optical imaging lens structure of example eight.

As shown in fig. 29, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

In this example, the total effective focal length f of the optical imaging lens is 2.55mm, the total length TTL of the optical imaging lens is 7.81mm, and the image height ImgH is 3.03 mm.

Table 15 shows a basic structural parameter table of the optical imaging lens of example eight, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

Watch 15

Table 16 shows the high-order term coefficients that can be used for each aspherical mirror surface in example eight, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

-6.7174E-01

2.3811E-02

9.7448E-03

-1.3927E-03

-5.1407E-05

-3.2438E-06

-2.2479E-07

S2

1.5516E-02

-1.4434E-02

-5.9508E-03

-2.2169E-03

-6.8579E-04

-2.3917E-04

-1.0251E-04

S3

8.1946E-02

-1.1970E-02

8.0623E-04

3.8080E-04

1.3621E-05

0.0000E+00

S4

1.5608E-01

2.7800E-03

3.4805E-03

4.4532E-04

9.7476E-06

1.6757E-07

0.0000E+00

S5

1.2015E-02

-9.5934E-04

1.0745E-03

-1.2660E-04

6.9810E-08

0.0000E+00

S6

-1.7557E-03

-8.5125E-05

4.0005E-04

-3.5813E-05

0.0000E+00

S7

4.3208E-02

-5.9690E-03

4.3011E-04

-1.2435E-04

-2.2359E-06

0.0000E+00

S8

1.1624E-01

8.7286E-03

2.7357E-03

-1.7827E-04

-4.1317E-06

1.1217E-08

0.0000E+00

S9

3.5744E-01

-4.5572E-03

7.7604E-03

-4.2857E-04

-4.3039E-05

-1.3639E-06

6.9898E-07

S10

1.8645E-01

8.1076E-03

-8.8342E-04

5.0054E-04

4.4804E-06

0.0000E+00

S11

-2.8749E-01

5.4316E-02

-3.8632E-03

-1.5057E-03

-8.3985E-06

0.0000E+00

S12

-1.0935E-01

4.0698E-02

-1.1481E-03

-2.4481E-03

-5.6048E-05

-1.8645E-06

-7.5959E-08

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

0.0000E+00

S2

-3.8080E-05

-2.9479E-05

-2.0426E-05

-2.3716E-05

-1.8428E-05

-1.6271E-05

-2.3128E-06

S3

0.0000E+00

S4

0.0000E+00

S5

0.0000E+00

S6

0.0000E+00

S7

0.0000E+00

S8

0.0000E+00

S9

0.0000E+00

S10

0.0000E+00

S11

0.0000E+00

S12

0.0000E+00

TABLE 16

Fig. 30 shows an on-axis chromatic aberration curve of the optical imaging lens of example eight, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the optical imaging lens. Fig. 31 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the optical imaging lens of example eight. Fig. 32 shows distortion curves of the optical imaging lens of example eight, which represent distortion magnitude values corresponding to different angles of view.

As can be seen from fig. 30 to 32, the optical imaging lens according to example eight can achieve good imaging quality.

Example nine

As shown in fig. 33 to 36, an optical imaging lens of example nine of the present application is described. Fig. 33 shows a schematic diagram of an optical imaging lens structure of example nine.

As shown in fig. 33, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

In this example, the total effective focal length f of the optical imaging lens is 2.55mm, the total length TTL of the optical imaging lens is 7.81mm, and the image height ImgH is 3.00 mm.

Table 17 shows a basic structural parameter table of the optical imaging lens of example nine, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 17

Table 18 shows the high-order term coefficients that can be used for each aspherical mirror surface in example nine, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Watch 18

Fig. 34 shows an on-axis chromatic aberration curve of the optical imaging lens of example nine, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the optical imaging lens. Fig. 35 shows astigmatism curves of the optical imaging lens of example nine, which represent meridional field curvature and sagittal field curvature. Fig. 36 shows distortion curves of the optical imaging lens of example nine, which represent distortion magnitude values corresponding to different angles of view.

As can be seen from fig. 34 to 36, the optical imaging lens according to example nine can achieve good imaging quality.

To sum up, examples one to nine satisfy the relationships shown in table 19, respectively.

Conditional formula/example	1	2	3	4	5	6	7	8	9
										T12/CT3	2.16	2.19	1.89	1.82	1.71	1.78	1.78	1.66	1.62
f34/f12	-0.71	-0.78	-0.53	-0.53	-0.49	-0.48	-0.45	-0.44	-0.42
										f3456/(f4+f5+f6)	0.74	0.76	0.54	0.48	0.34	0.42	0.49	0.34	0.37
f234/(f3-f4-f5)	0.32	0.34	0.41	0.44	0.45	0.49	0.42	0.45	0.45
										CT4/DT41	0.78	0.80	0.76	0.76	0.76	0.73	0.71	0.76	0.75
DT21/DT11	0.59	0.61	0.59	0.62	0.64	0.61	0.63	0.64	0.64
										BFL/ΣCT	0.89	0.96	0.79	0.78	0.68	0.72	0.72	0.62	0.59
(ET1+ET2)/(ET5+ET6)	0.88	0.89	1.01	1.01	0.99	0.95	0.97	0.95	0.94
										SAG11/SAG12	0.59	0.66	0.56	0.56	0.62	0.65	0.67	0.65	0.68
SAG62/(SAG42+SAG51)	0.58	0.63	0.43	0.45	0.40	0.35	0.39	0.40	0.36
										(N2+N3+N5)/3	1.64	1.65	1.62	1.62	1.63	1.62	1.62	1.63	1.63
V2+V5<V1+V3	0.43	0.47	0.35	0.35	0.35	0.35	0.37	0.36	0.37
										(R1+R2)/f1	-0.79	-0.81	-0.72	-0.65	-0.55	-0.56	-0.56	-0.52	-0.53
(R3+R4)/(R8-R7)	0.83	0.99	0.62	0.57	0.65	0.67	0.67	0.60	0.59
										(R9-R12)/R11	-1.13	-1.25	-0.61	-0.37	-0.38	-0.83	-1.20	-0.55	-0.87

Watch 19

Table 20 gives effective focal lengths f of the optical imaging lenses of example one to example nine, effective focal lengths f1 to f6 of the respective lenses, and the like.

Watch 20

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 along an optical axis:

a first lens;

a second lens, an object side surface of the second lens being a concave surface;

a third lens;

a fourth lens;

a fifth lens;

the image side surface of the sixth lens is a convex surface;

wherein the maximum field angle FOV of the optical imaging lens satisfies: 100 ° < FOV <180 °; the distance BFL from the image side surface of the sixth lens to the imaging surface on the optical axis satisfies the following condition: BFL is greater than 1.9 mm; an air interval T12 of the first lens and the second lens on the optical axis and a center thickness CT3 of the third lens on the optical axis satisfy: 1.5< T12/CT3< 3.5.

2. The optical imaging lens of claim 1, wherein a combined focal length f12 of the first and second lenses and a combined focal length f34 of the third and fourth lenses satisfy: -1.0< f34/f12 <0.

3. The optical imaging lens of claim 1, wherein an effective focal length f4 of the fourth lens, an effective focal length f5 of the fifth lens, an effective focal length f6 of the sixth lens, and a combined focal length f3456 of the third lens, the fourth lens, the fifth lens, and the sixth lens satisfy: 0< f3456/(f4+ f5+ f6) < 1.0.

4. The optical imaging lens of claim 1, wherein an effective focal length f3 of the third lens, an effective focal length f4 of the fourth lens, an effective focal length f5 of the fifth lens, and a combined focal length f234 of the second lens, the third lens, and the fourth lens satisfy: 0< f234/(f3-f4-f5) < 1.0.

5. The optical imaging lens of claim 1, wherein a center thickness CT4 of the fourth lens on the optical axis and a maximum effective radius DT41 of an object side surface of the fourth lens satisfy: 0< CT4/DT41< 1.0.

6. The optical imaging lens of claim 1, wherein a maximum effective radius DT11 of the object side surface of the first lens and a maximum effective radius DT21 of the object side surface of the second lens satisfy: 0< DT21/DT11< 1.0.

7. The optical imaging lens of claim 1, wherein a distance BFL between an image side surface of the sixth lens and an imaging surface on the optical axis and a sum Σ CT of thicknesses of the first lens to the sixth lens on the optical axis, respectively, satisfy: 0< BFL/sigma CT < 1.0.

8. The optical imaging lens according to claim 1, characterized in that the edge thickness ET1 of the first lens, the edge thickness ET2 of the second lens, the edge thickness ET5 of the fifth lens and the edge thickness ET6 of the sixth lens satisfy: 0.7< (ET1+ ET2)/(ET5+ ET6) < 1.2.

9. The optical imaging lens according to claim 1, wherein an on-axis distance SAG11 between an intersection point of the object-side surface of the first lens and the optical axis to an effective radius vertex of the object-side surface of the first lens and 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 satisfy: 0.3< SAG11/SAG12< 0.8.

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

a first lens;

a third lens;

a fourth lens;

a fifth lens;

the image side surface of the sixth lens is a convex surface;

wherein the maximum field angle FOV of the optical imaging lens satisfies: 100 ° < FOV <180 °; the distance BFL from the image side surface of the sixth lens to the imaging surface on the optical axis satisfies the following condition: BFL is greater than 1.9 mm; the distance BFL from the image side surface of the sixth lens to the imaging surface on the optical axis and the thickness sum Sigma CT of the first lens to the sixth lens on the optical axis respectively satisfy the following conditions: 0< BFL/sigma CT < 1.0.