CN217932241U - Optical imaging lens - Google Patents

Optical imaging lens Download PDF

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CN217932241U
CN217932241U CN202222029443.6U CN202222029443U CN217932241U CN 217932241 U CN217932241 U CN 217932241U CN 202222029443 U CN202222029443 U CN 202222029443U CN 217932241 U CN217932241 U CN 217932241U
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lens
optical imaging
imaging lens
image
radius
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李洋
邢天祥
戴付建
赵烈烽
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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Abstract

The application discloses an optical imaging lens, which sequentially comprises from an object side to an image side along an optical axis: a first lens having a positive optical power; a second lens having a negative optical power; a third lens; a fourth lens having a positive refractive power, an object-side surface of which is concave; a fifth lens having a negative refractive power, an image-side surface of which is concave; a sixth lens; and the optical imaging lens satisfies: 3.5mm < (f 4-f 5)/FNO <7.5mm; 1.5-straw CT2/T12<3.5;0.8 instead of f1/f tan (Semi-FOV) <2.0, where f4 is an effective focal length of the fourth lens, f5 is an effective focal length of the fifth lens, FNO is an f-number of the optical imaging lens, CT2 is a center thickness of the second lens, T12 is an air gap on the optical axis between the first lens and the second lens, f1 is an effective focal length of the first lens, f is an effective focal length of the optical imaging lens, and Semi-FOV is half of a maximum angle of view of the optical imaging lens.

Description

Optical imaging lens
Technical Field
The application relates to the field of optical elements, in particular to an optical imaging lens.
Background
With the development of science and technology, portable shooting products have become an essential part of people's life. People have higher and higher requirements on the performance of photographing equipment, and good imaging quality gradually becomes a main measurement index when a user selects a mobile phone or a camera.
The imaging quality of the camera lens is determined by the factors of the total length of the lens, the aperture, the head size and the like. Taking the front lens of the mobile phone as an example, due to the characteristics of the front lens, the relative length of the lens is determined by the ratio of the total length of the lens to the image height, the head size is influenced by the aperture and the total length of the lens, and the head size determines the size of the opening of the mobile phone screen and influences the imaging quality of the camera lens together. At present, the front lens of the mobile phone on the market generally has a large f-number (FNO > 2), the larger the f-number is, the smaller the aperture of the lens is, and the smaller the light entering amount is, so that the defect that the photographing effect of the lens is poor in a dark environment is caused.
Therefore, how to reasonably design the lens aperture, and when pursuing a large aperture, the characteristics of the total length of the lens and the smaller size of the head thereof are realized so as to improve the imaging quality of the camera lens becomes a problem which needs to be solved at present.
SUMMERY OF THE UTILITY MODEL
An aspect of the present disclosure provides an optical imaging lens, sequentially from an object side to an image side along an optical axis, comprising: a first lens having a positive optical power; a second lens having a negative optical power; a third lens; a fourth lens having a positive refractive power, an object-side surface of which is concave; a fifth lens having a negative refractive power, an image-side surface of which is concave; a sixth lens; and the optical imaging lens satisfies: 3.5mm < (f 4-f 5)/FNO <7.5mm; 1.5-straw CT2/T12<3.5; 0.8-sj f1/f tan (Semi-FOV) <2.0; wherein f4 is an effective focal length of the fourth lens, f5 is an effective focal length of the fifth lens, FNO is an f-number of the optical imaging lens, CT2 is a center thickness of the second lens, T12 is an air gap between the first lens and the second lens on the optical axis, f1 is an effective focal length of the first lens, f is an effective focal length of the optical imaging lens, and Semi-FOV is half of a maximum field angle of the optical imaging lens.
In one embodiment, at least one mirror surface of the object side surface of the first lens to the image side surface of the sixth lens is an aspheric mirror surface.
In one embodiment, the optical imaging lens satisfies: 0.4mm -1 <EPD/f/CT4<1.7mm -1 And EPD is the diameter of the entrance pupil of the optical imaging lens, f is the effective focal length of the optical imaging lens, and CT4 is the central thickness of the fourth lens.
In one embodiment, the optical imaging lens satisfies: -2.6< -f1/R2 + f5/R10< -0.5, wherein f1 is the central thickness of the first lens, R2 is the radius of curvature of the image-side surface of the first lens, f5 is the effective focal length of the fifth lens, and R10 is the radius of curvature of the image-side surface of the fifth lens.
In one embodiment, the optical imaging lens satisfies: 1.5< -R4/R10 <4.5, wherein R4 is the curvature radius of the image side surface of the second lens, and R10 is the curvature radius of the image side surface of the fifth lens.
In one embodiment, the optical imaging lens satisfies: -11.0< (R7 + R8)/CT 4< -7.0, wherein R7 is the radius of curvature of the object-side surface of the fourth lens, R8 is the radius of curvature of the image-side surface of the fourth lens, and CT4 is the center thickness of the fourth lens.
In one embodiment, the optical imaging lens satisfies: 1.4< (R9 + R10)/(R9-R10) <3.5, wherein R9 is a radius of curvature of an object-side surface of the fifth lens and R10 is a radius of curvature of an image-side surface of the fifth lens.
In one embodiment, the optical imaging lens satisfies: -2.5< -f4/R7 < -0.4, wherein f4 is the effective focal length of the fourth lens, and R7 is the radius of curvature of the object-side surface of the fourth lens.
In one embodiment, the optical imaging lens satisfies: 3.8< (DT 11+ DT 51)/CT 1<6.5, wherein DT11 is the effective radius of the object-side surface of the first lens, DT51 is the effective radius of the object-side surface of the fifth lens, and CT1 is the center thickness of the first lens.
In one embodiment, the optical imaging lens satisfies: TTL/(CT 4+ T45+ CT5+ T56) <4.5 is less than 3.0, where TTL is a distance from an object-side surface of the first lens element to an imaging surface of the optical imaging lens along the optical axis, CT4 is a center thickness of the fourth lens element, T45 is an air gap between the fourth lens element and the fifth lens element on the optical axis, CT5 is a center thickness of the fifth lens element, and T56 is an air gap between the fifth lens element and the sixth lens element on the optical axis.
In one embodiment, the optical imaging lens satisfies: 2.0< (DT 62-DT 42)/(DT 41-DT 11) <4.5, where DT62 is the effective radius of the image-side surface of the sixth lens, DT42 is the effective radius of the image-side surface of the fourth lens, DT41 is the effective radius of the object-side surface of the fourth lens, and DT11 is the effective radius of the object-side surface of the first lens.
In one embodiment, the optical imaging lens satisfies: 2.0 and < -DT61/DT 11<3.7, wherein DT61 is the effective radius of the object-side surface of the sixth lens and DT11 is the effective radius of the object-side surface of the first lens.
In one embodiment, the optical imaging lens satisfies: 2.0< -f345/(ET 3+ ET4+ ET 5)/2 < -6.5, wherein f345 is the combined focal length of the third lens, the fourth lens and the fifth lens, ET3 is the edge thickness at the maximum effective radius of the third lens, ET4 is the edge thickness at the maximum effective radius of the fourth lens, and ET5 is the edge thickness at the maximum effective radius of the fifth lens.
In one embodiment, the optical imaging lens satisfies: 1.0 plus SAG 42/(SAG 51-SAG 21) <2.7, wherein SAG42 is a distance on the optical axis from the intersection of the fourth lens image-side surface and the optical axis to the effective radius vertex of the fourth lens image-side surface, SAG51 is a distance on the optical axis from the intersection of the fifth lens object-side surface and the optical axis to the effective radius vertex of the fifth lens object-side surface, and SAG21 is a distance on the optical axis from the intersection of the second lens object-side surface and the optical axis to the effective radius vertex of the fourth lens object-side surface.
In one embodiment, the optical imaging lens satisfies: -1.8 instead of SAG41/ET4< -0.3, wherein SAG41 is the distance on the optical axis from the intersection of the fourth lens object-side surface and the optical axis to the effective radius vertex of the fourth lens object-side surface, and ET4 is the edge thickness at the maximum effective radius of the fourth lens.
In one embodiment, the optical imaging lens satisfies: 0< (ET 3+ ET5+ ET 6)/TD <0.5, wherein ET3 is the edge thickness of the third lens at the maximum effective radius, ET5 is the edge thickness of the fifth lens at the maximum effective radius, ET6 is the edge thickness of the sixth lens at the maximum effective radius, and TD is the distance from the object-side surface of the first lens to the image-side surface of the sixth lens on the optical axis.
In one embodiment, the optical imaging lens satisfies: 4.3< -DT52/ET 5<7.0, wherein DT52 is the effective radius of the image side surface of the fifth lens, and ET5 is the edge thickness at the maximum effective radius of the fifth lens.
In one embodiment, the optical imaging lens satisfies: 77.0 ° < FNO × Semi-FOV <87.0 °, wherein FNO is an f-number of the optical imaging lens and Semi-FOV is half of a maximum field angle of the optical imaging lens.
In one embodiment, the optical imaging lens satisfies: 0< (T34 + T45)/(R5 + R7) <0.8, where T34 is an air gap on the optical axis of the third lens and the fourth lens, T45 is an air gap on the optical axis of the fourth lens and the fifth lens, R5 is a radius of curvature of an object-side surface of the third lens, and R7 is a radius of curvature of an object-side surface of the fourth lens.
The six-lens type lens framework is adopted, and the ratio of the difference value of the effective focal lengths of the fourth lens and the fifth lens in the optical imaging lens to the aperture is reasonably controlled, so that the lens has a large aperture and reasonable focal power distribution, and the image quality of the lens is favorably improved; by controlling the central thickness of the second lens and the ratio of the air intervals of the first lens and the second lens on the optical axis, the processing performance of the second lens can be ensured, and the characteristics of small total length and ultrathin lens can be realized; by controlling the product of the ratio of the effective focal length of the optical imaging lens and the first lens and the tangent value of half of the maximum field angle, the reasonable distribution of the focal power of the first lens can be ensured, and the ultrathin characteristic and the smaller characteristic of the head of the lens are realized.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 shows a schematic configuration diagram of an optical imaging lens according to embodiment 1 of the present application;
fig. 2A to 2D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the optical imaging lens of embodiment 1, respectively;
fig. 3 is a schematic structural view showing an optical imaging lens according to embodiment 2 of the present application;
fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 2;
fig. 5 is a schematic structural view showing an optical imaging lens according to embodiment 3 of the present application;
fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 3;
fig. 7 is a schematic structural view showing an optical imaging lens according to embodiment 4 of the present application;
fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 4;
fig. 9 is a schematic structural view showing an optical imaging lens according to embodiment 5 of the present application;
fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 5;
fig. 11 is a schematic structural view showing an optical imaging lens according to embodiment 6 of the present application;
fig. 12A to 12D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 6;
fig. 13 is a schematic structural view showing an optical imaging lens according to embodiment 7 of the present application; and
fig. 14A to 14D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the optical imaging lens of embodiment 7, respectively.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
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 closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.
It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to examples or illustrations.
Unless otherwise defined, all terms (including 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. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
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 application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The following provides a detailed description of the features, principles, and other aspects of the present application.
An optical imaging lens according to an exemplary embodiment of the present application may include six lenses having optical powers, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, respectively. The six lenses are arranged along the optical axis in sequence from the object side to the image side. Any two adjacent lenses of the first lens to the sixth lens may have an air space therebetween.
In an exemplary embodiment, the first lens and the fourth lens may each have positive optical power; the second lens and the fifth lens both have negative focal power; the object side surface of the fourth lens is a concave surface; the image side surface of the fifth lens is a concave surface. By controlling the focal power and the surface type of the optical imaging lens, the characteristics of ultrathin optical imaging lens, larger aperture and smaller head can be ensured.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 3.5mm < (f 4-f 5)/FNO <7.5mm, wherein f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, and FNO is the f-number of the optical imaging lens. Through reasonably controlling the ratio of the difference value of the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens to the aperture FNO in the optical imaging lens, the aperture of the lens is large, and the focal power of the lens is distributed in a reasonable range, so that the image quality of the lens is improved. More specifically, the ratio of the difference between f4 and f5 to FNO further satisfies: 4.3mm < (f 4-f 5)/FNO <7.0mm.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.5< -CT2/T12 <3.5 >, CT2 is the central thickness of the second lens, and T12 is the air gap on the optical axis of the first lens and the second lens. By controlling the ratio of the central thickness CT2 of the second lens to the air interval T12 of the first lens and the second lens on the optical axis, the processability of the second lens can be ensured, the total length of the lens is smaller, and the ultrathin characteristic of the lens is realized. More specifically, the ratio of CT2 to T12 further satisfies: 2.0 sT 2/T12<2.8.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.8< -f 1/f tan (Semi-FOV) <2.0, wherein f1 is the effective focal length of the first lens, f is the effective focal length of the optical imaging lens, and the Semi-FOV is half of the maximum field angle of the optical imaging lens. By controlling the product of the ratio of the effective focal length f1 of the optical imaging lens to the effective focal length f of the first lens and the tangent tan (Semi-FOV) of half of the maximum angle of view, the distribution of the optical power of the first lens can be ensured, achieving the ultra-thin characteristic of the lens and the small head characteristic. More specifically, the product of the ratio of f1 to f and tan (Semi-FOV) further satisfies: 1.1 and n f1/f tan (Semi-FOV) <1.6.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.4mm -1 <EPD/f/CT4<1.7mm -1 EPD is the entrance pupil diameter of the optical imaging lens, f is the effective focal length of the optical imaging lens, and CT4 is the center thickness of the fourth lens. The ratio of the entrance pupil diameter EPD of the optical imaging lens to the effective focal length f of the optical imaging lens to the ratio of the center thickness CT4 of the fourth lens is controlled within a reasonable range, so that the large aperture characteristic of the optical imaging lens can be ensured, and better image quality can be achieved in a darker environment. More specifically, the ratio of EPD to f to CT4 further satisfies: 0.7mm -1 <EPD/f/CT4<1.5mm -1 。
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -2.6< -f 1/R2+ f5/R10< -0.5 >, f1 is the central thickness of the first lens, R2 is the radius of curvature of the image-side surface of the first lens, f5 is the effective focal length of the fifth lens, and R10 is the radius of curvature of the image-side surface of the fifth lens. The sum of the ratio of the central thickness f1 of the first lens, the curvature radius R2 of the image side surface of the first lens, the effective focal length f5 of the fifth lens and the curvature radius R10 of the image side surface of the fifth lens is controlled within a certain range, so that the shapes and focal powers of the first lens and the fifth lens can be controlled, the head size is small on the premise that the aperture is large, and the lens is light and thin. More specifically, the sum of the ratio of both f1, R2 and the ratio of both f5, R10 further satisfies: -2.3< -f1/R2 + f5/R10< -1.0.
In an exemplary embodiment, an optical imaging lens according to the present application satisfies: 1.5< -R4/R10 <4.5, wherein R4 is the curvature radius of the image side surface of the second lens, and R10 is the curvature radius of the image side surface of the fifth lens. By controlling the ratio of the curvature radius R4 of the image side surface of the second lens to the curvature radius R10 of the image side surface of the fifth lens within a certain range, ghost images generated by the second lens and the fifth lens can be reduced, and the imaging quality is improved. More specifically, the radius of curvature R4 of the image-side surface of the second lens and the radius of curvature R10 of the image-side surface of the fifth lens satisfy: 2.0 sR4/R10 <4.2.
In an exemplary embodiment, an optical imaging lens according to the present application satisfies: -11.0< (R7 + R8)/CT 4< -7.0, R7 being the fourth lens object side radius of curvature, R8 being the fourth lens image side radius of curvature, CT4 being the fourth lens center thickness. By controlling the ratio of the sum of the curvature radius R7 of the object side surface of the fourth lens and the curvature radius R8 of the image side surface of the fourth lens to the central thickness CT4 of the fourth lens, the curvature of the fourth lens can be controlled within a certain range, the lens is favorable for processing and forming the lens, the off-axis aberration of the lens is reduced, and the image quality is improved. More specifically, the ratio of the sum of R7 and R8 to CT4 further satisfies: -10.7< (R7 + R8)/CT 4< -7.5.
In an exemplary embodiment, an optical imaging lens according to the present application satisfies: 1.4< (R9 + R10)/(R9-R10) <3.5, R9 is the fifth lens object side curvature radius, and R10 is the fifth lens image side curvature radius. The ratio of the sum of the curvature radius R9 of the object side surface of the five lenses and the curvature radius R10 of the image side surface of the fifth lens to the difference between the sum and the difference is controlled within a certain range, so that the contribution of the image side surface and the image source side surface astigmatism of the fifth lens is favorably controlled, and the image quality of a middle view field and an aperture zone can be reasonably controlled. More specifically, the ratio of the sum of R9 and R10 to the difference therebetween may further satisfy: 1.8< (R9 + R10)/(R9-R10) <3.0.
In an exemplary embodiment, an optical imaging lens according to the present application satisfies: -2.5< -f4/R7 < -0.4 >, f4 being the effective focal length of the fourth lens and R7 being the radius of curvature of the object-side surface of the fourth lens. By controlling the ratio of the effective focal length f4 of the fourth lens to the curvature radius R7 of the object side surface of the fourth lens, the effective focal length of the fourth lens can be reasonably distributed, and the image quality of the lens is improved. More specifically, the ratio of f4 to R7 further satisfies: -2.3 sf4/R7 < -0.6.
In an exemplary embodiment, an optical imaging lens according to the present application satisfies: 3.8< (DT 11+ DT 51)/CT 1<6.5, DT11 is the effective radius of the object-side surface of the first lens, DT51 is the effective radius of the object-side surface of the fifth lens, and CT1 is the center thickness of the first lens. By controlling the ratio of the sum of the effective radius DT11 of the object side surface of the first lens and the effective radius DT51 of the object side surface of the fifth lens to the central thickness CT1 of the first lens, the effective radii of the object sides of the first lens and the fifth lens can be restricted within a certain range, and the optical imaging lens is favorable for realizing the characteristic of a small head. Further, the ratio of the sum of DT11 and DT51 to CT1 may satisfy: 4.2< (DT 11+ DT 51)/CT 1<6.0.
In an exemplary embodiment, an optical imaging lens according to the present application satisfies: 3.0< -TTL/(CT 4+ T45+ CT5+ T56) <4.5, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis, CT4 is the center thickness of the fourth lens, T45 is the air gap between the fourth lens and the fifth lens on the optical axis, CT5 is the center thickness of the fifth lens, and T56 is the air gap between the fifth lens and the sixth lens on the optical axis. The total length of the lens can be ensured within a certain range by controlling the ratio of the sum of the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis and the central thickness CT4 of the fourth lens, the air gap T45 of the fourth lens and the fifth lens on the optical axis, the central thickness CT5 of the fifth lens and the sum of the air gaps T56 of the fifth lens and the sixth lens on the optical axis to be within a certain range, so that the ultrathin characteristic of the lens is favorably realized. More specifically, the ratio of TTL to the sum of CT4, T45, CT5, T56 may further satisfy: 3.5 +/-TTL/(CT 4+ T45+ CT5+ T56) <4.2.
In an exemplary embodiment, an optical imaging lens according to the present application satisfies: 2.0< (DT 62-DT 42)/(DT 41-DT 11) <4.5, DT62 is the effective radius of the image side surface of the sixth lens, DT42 is the effective radius of the image side surface of the fourth lens, DT41 is the effective radius of the object side surface of the fourth lens, and DT11 is the effective radius of the object side surface of the first lens. By controlling the ratio of the difference between the effective radius of the sixth lens element on the object side DT61 and the effective radius of the fourth lens element on the image side DT42 to the difference between the effective radius of the fourth lens element on the object side DT41 and the effective radius of the first lens element on the object side DT11, the small head characteristic of the lens can be ensured. More specifically, the ratio of the difference between DT62 and DT42 to the difference between DT41 and DT11 further satisfies: 2.5< (DT 62-DT 42)/(DT 41-DT 11) <4.0.
In an exemplary embodiment, an optical imaging lens according to the present application satisfies: 2.0< -DT61/DT 11<3.7 >, DT61 is the sixth lens object side effective radius, and DT11 is the first lens object side effective radius. By controlling the ratio of the effective radius of the sixth lens to the effective radius of the first lens, the light transmission amount of the optical imaging lens can be increased, and the relative illumination of the edge field of view is improved. More specifically, the ratio of DT61 to DT11 further satisfies: 2.5 are constructed of DT61/DT11<3.3.
In an exemplary embodiment, an optical imaging lens according to the present application satisfies: 2.0 n/f 345/(ET 3+ ET4+ ET 5)/2 n 6.5, wherein f345 is the combined focal length of the third lens, the fourth lens and the fifth lens, ET3 is the edge thickness at the maximum effective radius of the third lens, ET4 is the edge thickness at the maximum effective radius of the fourth lens and ET5 is the edge thickness at the maximum effective radius of the fifth lens. By controlling the ratio of the combined focal length f345 of the third lens, the fourth lens and the fifth lens to the sum of the edge thickness ET3 at the maximum effective radius of the third lens, the edge thickness ET4 at the maximum effective radius of the fourth lens and the edge thickness ET5 at the maximum effective radius of the fifth lens, the inner space of the lens can be reasonably distributed, and the ultrathin characteristic of the lens is ensured. More specifically, the ratio of f345 to the sum of ET3, ET4, ET5 satisfies: 2.4-straw f345/(ET 3+ ET4+ ET 5)/2-straw 6.1.
In an exemplary embodiment, an optical imaging lens according to the present application satisfies: 1.0 instead of SAG 42/(SAG 51-SAG 21) <2.7, SAG42 is the distance on the optical axis from the intersection 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, SAG51 is the distance on the optical axis from the intersection of the object side surface of the fifth lens and the optical axis to the effective radius vertex of the object side surface of the fifth lens, and SAG21 is the distance on the optical axis from the intersection of the object side surface of the second lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens. By controlling the ratio of the difference between the distance SAG42 on the optical axis from 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 and the optical axis, and the distance SAG51 on the optical axis from the intersection point of the object side surface of the fifth lens and the optical axis to the effective radius vertex of the object side surface of the fifth lens, and the distance SAG21 on the optical axis from the intersection point of the object side surface of the second lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens, the total length of the optical imaging lens can be effectively controlled, and the volume of the system can be reduced. More specifically, the ratio of the SAG42 to the difference between SAG51 and SAG21 further satisfies: 1.5 plus SAG 42/(SAG 51-SAG 21) <2.4.
In an exemplary embodiment, an optical imaging lens according to the present application satisfies: -1.8< -SAG 41/ET4< -0.3 >, SAG41 is the distance on the optical axis from the intersection of the object-side surface of the fourth lens and the optical axis to the effective radius vertex of the object-side surface of the fourth lens, and ET4 is the edge thickness at the maximum effective radius of the fourth lens. By controlling the ratio of the distance SAG41 from the intersection point of the object-side surface of the fourth lens and the optical axis to the effective radius vertex of the object-side surface of the fourth lens on the optical axis to the edge thickness ET4 at the maximum effective radius of the fourth lens to be within a reasonable range, the shape and the edge thickness of the fourth lens can be controlled, ghost images generated by internal reflection of the fourth lens are weakened, and the imaging quality of the lens is improved. More specifically, the ratio of SAG41 to ET4 further satisfies: -1.5-woven SAG41/ET4< -0.6.
In an exemplary embodiment, an optical imaging lens according to the present application satisfies: 0< (ET 3+ ET5+ ET 6)/TD <0.5, ET3 is the edge thickness at the maximum effective radius of the third lens, ET5 is the edge thickness at the maximum effective radius of the fifth lens, ET6 is the edge thickness at the maximum effective radius of the sixth lens, and TD is the distance on the optical axis from the object side surface of the first lens to the image side surface of the sixth lens. By controlling the sum of the edge thickness ET3 at the maximum effective radius of the third lens, the edge thickness ET5 at the maximum effective radius of the fifth lens and the edge thickness ET6 at the maximum effective radius of the sixth lens to be within a certain range, the ratio of the distance TD from the object side surface of the first lens to the image side surface of the sixth lens on the optical axis can be ensured to be smaller, the edge thicknesses of the third lens, the fifth lens and the sixth lens can be ensured to be within a processing range, and the processability of the lens can be improved. More specifically, the ratio of the sum of ET3, ET5 and ET6 to TD further satisfies: 0.2< (ET 3+ ET5+ ET 6)/TD <0.4.
In an exemplary embodiment, an optical imaging lens according to the present application satisfies: 4.3 sj DT52/ET5<7.0, DT52 is the effective radius of the image side surface of the fifth lens, ET5 the edge thickness at the maximum effective radius of the fifth lens. By controlling the effective radius DT52 of the image side surface of the fifth lens and the edge thickness ET5 at the maximum effective radius of the fifth lens within a certain range, the shape of the fifth lens can be controlled, ghost images generated by internal reflection of the fifth lens are weakened, and the imaging quality is improved. More specifically, the ratio of DT52 to ET5 further satisfies: 4.5 sP DT52/ET5<6.5.
In an exemplary embodiment, an optical imaging lens according to the present application satisfies: 77.0 ° < FNO × Semi-FOV <87.0 °, FNO being the f-number of the optical imaging lens, semi-FOV being half of the maximum field angle of the optical imaging lens. By controlling the product of the f-number FNO of the optical imaging lens and half Semi-FOV of the maximum field angle of the optical imaging lens within a reasonable range, the lens can present better image quality and larger shooting range under the condition of darker light. More specifically, the product of FNO and Semi-FOV satisfies: 79.0 ° < FNO + Semi-FOV <86.0 °
In an exemplary embodiment, an optical imaging lens according to the present application satisfies: 0< (T34 + T45)/(R5 + R7) <0.8, T34 is an air gap on the optical axis of the third lens and the fourth lens, T45 is an air gap on the optical axis of the fourth lens and the fifth lens, R5 is a curvature radius of an object-side surface of the third lens, and R7 is a curvature radius of an object-side surface of the fourth lens. By controlling the ratio of the sum of the air gap T34 of the third lens and the fourth lens on the optical axis and the air gap T45 of the fourth lens and the fifth lens on the optical axis to the sum of the curvature radius R5 of the object side surface of the third lens and the curvature radius R7 of the object side surface of the fourth lens, the interval between the fourth lens and the third lens and the fifth lens can be controlled, and the bending of the object side surface of the third lens and the object side surface of the fourth lens can be controlled, so that better image quality is realized under the condition of ensuring that the total length of the lens is smaller. More specifically, the ratio of the sum of T34, T45 to the sum of R5, R7 further satisfies: 0< (T34 + T45)/(R5 + R7) <0.5.
In an exemplary embodiment, the effective focal length f of the optical imaging system may be, for example, in the range of 3.0mm to 3.5mm, the effective focal length f1 of the first lens may be, for example, in the range of 3.5mm to 4.5mm, the effective focal length f2 of the second lens may be, for example, in the range of-16 mm to-8 mm, the effective focal length f3 of the third lens may be, for example, in the range of 9mm to 18mm, the effective focal length f4 of the fourth lens may be, for example, in the range of 2.5mm to 7mm, the effective focal length f5 of the fifth lens may be, for example, in the range of-7 mm to-4 mm, and the effective focal length f6 of the sixth lens may be, for example, in the range of-36 mm to 35mm.
In an exemplary embodiment, the total length TTL of the optical imaging lens (i.e., the distance on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens) may be, for example, in the range of 4.3mm to 4.5mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens may be, for example, in the range of 3.0mm to 4.0mm, the half Semi-FOV of the maximum angle of view of the optical imaging lens may be, for example, in the range of 40 ° to 48 °, and the f-number FNO of the imaging lens may be, for example, in the range of 1.7 to 2.0.
In an exemplary embodiment, an optical imaging lens according to the present application further includes a diaphragm, which may be disposed between the object side and the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on the imaging surface.
The application provides an optical imaging lens scheme, under the relatively great prerequisite of light ring, can realize the less effect of camera lens overall length and head size. The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, six lenses as described above, and by reasonably distributing the power and surface type of each lens, the center thickness of each lens, and the on-axis distance between each lens, etc., incident light may be effectively converged, the optical overall length of the imaging lens may be reduced, and the workability of the imaging lens may be improved, so that the optical imaging lens may be more advantageous for production and processing.
In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object-side surface of the first lens to the image-side surface of the sixth 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, and the imaging quality is improved. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the sixth lens is an aspheric mirror surface. Optionally, each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens has an object-side surface and an image-side surface which are aspheric mirror surfaces.
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 including six lenses. The optical imaging lens may also include other numbers of lenses, if desired.
Specific examples of an optical imaging lens applicable to the above-described embodiments are further described below with reference to the drawings.
Example 1
An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic structural diagram of an optical imaging lens according to embodiment 1 of the present application.
As shown in fig. 1, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image plane S15.
The first lens element E1 has positive refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and the object-side surface S3 is convex and the image-side surface S4 is concave. The third lens element E3 has positive refractive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has a negative refractive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane S15.
Table 1 shows a basic parameter table of the optical imaging lens of embodiment 1, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).
Figure BDA0003779521900000101
TABLE 1
In this example, the total effective focal length f of the optical imaging lens is 3.19mm, the half Semi-FOV of the maximum field angle of the optical imaging lens is 45.33 °, the half ImgH of the diagonal length of the effective pixel region on the imaging plane S15 of the optical imaging lens is 3.43mm, the f-number FNO of the imaging lens is 1.78, and the total length TTL of the optical imaging lens is 4.34mm.
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 to the sixth lens E6 are aspheric, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric formula:
Figure BDA0003779521900000111
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 =1/R (i.e., paraxial curvature c is the reciprocal of the 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. The high-order coefficient A for each of the aspherical mirror surfaces S1 to S12 used in example 1 is shown in tables 2-1 and 2-2 below 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 And A 30 。
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -1.51E-02 1.74E-01 -1.46E+00 6.91E+00 -1.99E+01 3.51E+01 -3.75E+01
S2 -1.56E-01 1.37E-01 8.61E-02 -6.73E-01 1.03E+00 5.88E-01 -5.81E+00
S3 -2.39E-01 7.67E-01 -4.24E+00 2.45E+01 -7.08E+01 -2.87E+01 9.89E+02
S4 -1.70E-01 8.20E-01 -5.45E+00 3.95E+01 -2.05E+02 7.40E+02 -1.87E+03
S5 -2.53E-01 1.94E+00 -2.26E+01 1.70E+02 -8.67E+02 3.04E+03 -7.46E+03
S6 -1.29E-01 2.47E-01 5.69E-02 -8.53E+00 5.01E+01 -1.58E+02 3.15E+02
S7 -1.14E-01 3.81E-01 -6.84E-01 9.62E-01 -4.71E+00 1.97E+01 -4.85E+01
S8 5.73E-01 -2.65E+00 1.08E+01 -3.58E+01 8.62E+01 -1.48E+02 1.84E+02
S9 4.07E-01 -8.37E-01 1.65E+00 -4.42E+00 9.03E+00 -1.24E+01 1.17E+01
S10 -3.14E-01 1.64E+00 -4.51E+00 7.29E+00 -7.94E+00 6.13E+00 -3.44E+00
S11 -7.43E-01 6.50E-01 -5.56E-01 2.81E-01 2.71E-04 -9.31E-02 6.34E-02
S12 -7.07E-01 5.96E-01 -4.18E-01 2.07E-01 -6.97E-02 1.76E-02 -4.53E-03
TABLE 2-1
Figure BDA0003779521900000112
Figure BDA0003779521900000121
Tables 2 to 2
Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 1. Fig. 2C shows distortion curves of the optical imaging lens of embodiment 1, which represent distortion magnitude values corresponding to different fields of view. Fig. 2D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 1, which represents a deviation of different image heights on an imaging plane after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens system according to embodiment 1 can achieve good imaging quality.
Example 2
An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. Fig. 3 shows a schematic structural diagram of an optical imaging lens according to embodiment 2 of the present application.
As shown in fig. 3, the optical imaging lens includes, in order from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and image plane S15.
The first lens element E1 has positive refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and the object-side surface S3 is convex and the image-side surface S4 is concave. The third lens element E3 has positive refractive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive refractive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has a negative refractive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane S15.
In the present example, the total effective focal length f of the optical imaging lens is 3.14mm, the half Semi-FOV of the maximum field angle of the optical imaging lens is 45.79 °, the half ImgH of the diagonal length of the effective pixel region on the imaging plane S15 of the optical imaging lens is 3.43mm, the f-number FNO of the imaging lens is 1.74, and the total length TTL of the optical imaging lens is 4.35mm.
Table 3 shows a basic parameter table of the optical imaging lens of embodiment 2, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Tables 4-1 and 4-2 show high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.
Figure BDA0003779521900000122
Figure BDA0003779521900000131
TABLE 3
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -1.39E-02 2.22E-01 -2.02E+00 1.05E+01 -3.26E+01 6.15E+01 -6.93E+01
S2 -1.44E-01 9.29E-02 4.07E-01 -2.18E+00 5.54E+00 -7.80E+00 4.26E+00
S3 -2.45E-01 9.77E-01 -8.15E+00 6.23E+01 -2.99E+02 8.88E+02 -1.55E+03
S4 -1.69E-01 7.62E-01 -4.83E+00 3.27E+01 -1.60E+02 5.50E+02 -1.35E+03
S5 -2.14E-01 1.26E+00 -1.44E+01 1.06E+02 -5.30E+02 1.82E+03 -4.37E+03
S6 -9.42E-02 -7.94E-02 1.85E+00 -1.36E+01 5.50E+01 -1.42E+02 2.47E+02
S7 -8.62E-02 3.39E-01 -1.55E+00 7.47E+00 -2.86E+01 7.49E+01 -1.35E+02
S8 6.57E-01 -3.14E+00 1.20E+01 -3.56E+01 7.78E+01 -1.24E+02 1.44E+02
S9 4.94E-01 -1.42E+00 3.70E+00 -8.76E+00 1.52E+01 -1.85E+01 1.60E+01
S10 -2.80E-01 1.40E+00 -3.70E+00 5.72E+00 -5.94E+00 4.38E+00 -2.34E+00
S11 -7.41E-01 5.75E-01 -4.01E-01 9.75E-02 1.38E-01 -1.63E-01 8.73E-02
S12 -7.13E-01 5.37E-01 -2.90E-01 6.02E-02 4.08E-02 -3.99E-02 1.68E-02
TABLE 4-1
Figure BDA0003779521900000132
Figure BDA0003779521900000141
TABLE 4-2
Fig. 4A shows on-axis chromatic aberration curves of the optical imaging lens of embodiment 2, which represent the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 2. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different fields of view. Fig. 4D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 2, which represents a deviation of different image heights on an imaging plane after light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens according to embodiment 2 can achieve good imaging quality.
Example 3
An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic structural diagram of an optical imaging lens according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens includes, in order from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and image plane S15.
The first lens element E1 has positive refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and the object-side surface S3 is convex and the image-side surface S4 is concave. The third lens element E3 has positive refractive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has a negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane S15.
In the present example, the total effective focal length f of the optical imaging lens is 3.22mm, the half Semi-FOV of the maximum field angle of the optical imaging lens is 46.01 °, the half ImgH of the diagonal length of the effective pixel region on the imaging plane S15 of the optical imaging lens is 3.54mm, the f-number FNO of the imaging lens is 1.84, and the total length TTL of the optical imaging lens is 4.34mm.
Table 5 shows a basic parameter table of the optical imaging lens of embodiment 3, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Tables 6-1 and 6-2 show high-order term coefficients that can be used for each aspherical mirror in example 3, wherein each aspherical mirror type can be defined by the formula (1) given in example 1 above.
Figure BDA0003779521900000142
Figure BDA0003779521900000151
TABLE 5
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -1.71E-02 1.44E-01 -1.08E+00 4.48E+00 -1.14E+01 1.78E+01 -1.68E+01
S2 -1.62E-01 2.47E-01 -1.08E+00 5.58E+00 -1.88E+01 3.86E+01 -4.84E+01
S3 -2.52E-01 8.85E-01 -7.06E+00 5.96E+01 -3.37E+02 1.31E+03 -3.61E+03
S4 -1.89E-01 6.39E-01 -1.69E+00 1.56E+00 2.71E+01 -1.78E+02 5.54E+02
S5 -2.34E-01 1.16E+00 -1.15E+01 7.65E+01 -3.46E+02 1.07E+03 -2.28E+03
S6 -1.17E-01 -4.72E-02 2.82E+00 -2.31E+01 9.87E+01 -2.65E+02 4.76E+02
S7 -7.31E-02 -1.51E-01 3.31E+00 -1.70E+01 4.95E+01 -9.60E+01 1.30E+02
S8 4.93E-01 -2.05E+00 7.09E+00 -1.92E+01 3.66E+01 -4.75E+01 4.12E+01
S9 3.75E-01 -7.37E-01 1.61E+00 -4.67E+00 9.50E+00 -1.26E+01 1.14E+01
S10 -3.21E-01 1.77E+00 -4.80E+00 7.53E+00 -7.90E+00 5.87E+00 -3.17E+00
S11 -8.79E-01 1.09E+00 -1.24E+00 9.88E-01 -5.18E-01 1.83E-01 -4.39E-02
S12 -8.60E-01 1.03E+00 -1.09E+00 8.86E-01 -5.42E-01 2.50E-01 -8.59E-02
TABLE 6-1
Figure BDA0003779521900000152
Figure BDA0003779521900000161
TABLE 6-2
Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 3. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different fields of view. Fig. 6D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 3, which represents a deviation of different image heights on an imaging plane after light passes through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens according to embodiment 3 can achieve good imaging quality.
Example 4
An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic structural diagram of an optical imaging lens according to embodiment 4 of the present application.
As shown in fig. 7, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image plane S15.
The first lens element E1 has positive refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and the object-side surface S3 is convex and the image-side surface S4 is concave. The third lens element E3 has positive refractive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has a negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane S15.
In the present example, the total effective focal length f of the optical imaging lens is 3.23mm, the half Semi-FOV of the maximum field angle of the optical imaging lens is 46.54 °, the half ImgH of the diagonal length of the effective pixel region on the imaging plane S15 of the optical imaging lens is 3.60mm, the f-number FNO of the imaging lens is 1.82, and the total length TTL of the optical imaging lens is 4.35mm.
Table 7 shows a basic parameter table of the optical imaging lens of embodiment 4, in which the units of the radius of curvature, the thickness/distance, and the focal length are millimeters (mm). Tables 8-1 and 8-2 show the coefficients of high-order terms that can be used for each aspherical mirror surface in example 4, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.
Figure BDA0003779521900000162
Figure BDA0003779521900000171
TABLE 7
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -2.08E-02 2.23E-01 -1.81E+00 8.36E+00 -2.33E+01 3.99E+01 -4.09E+01
S2 -1.64E-01 3.17E-01 -1.75E+00 8.94E+00 -2.81E+01 5.29E+01 -6.01E+01
S3 -2.07E-01 -2.05E-01 7.27E+00 -5.76E+01 2.92E+02 -1.00E+03 2.36E+03
S4 -1.88E-01 9.59E-01 -7.20E+00 4.89E+01 -2.23E+02 6.89E+02 -1.47E+03
S5 -1.95E-01 5.90E-01 -4.34E+00 2.18E+01 -7.24E+01 1.41E+02 -8.80E+01
S6 -1.36E-01 4.92E-01 -2.17E+00 3.86E+00 4.45E+00 -4.18E+01 1.08E+02
S7 -1.18E-01 6.30E-01 -2.13E+00 6.10E+00 -1.68E+01 3.86E+01 -6.68E+01
S8 3.55E-01 -8.82E-01 1.12E+00 7.74E-01 -8.70E+00 2.41E+01 -3.92E+01
S9 3.80E-01 -7.82E-01 1.59E+00 -3.97E+00 7.34E+00 -9.14E+00 7.81E+00
S10 -2.24E-01 1.31E+00 -3.57E+00 5.47E+00 -5.55E+00 3.98E+00 -2.07E+00
S11 -8.50E-01 1.03E+00 -1.14E+00 8.83E-01 -4.56E-01 1.61E-01 -3.99E-02
S12 -8.80E-01 1.06E+00 -1.10E+00 8.66E-01 -5.08E-01 2.22E-01 -7.23E-02
TABLE 8-1
Figure BDA0003779521900000172
Figure BDA0003779521900000181
TABLE 8-2
Fig. 8A shows on-axis chromatic aberration curves of the optical imaging lens of embodiment 4, which represent the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 4. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different fields of view. Fig. 8D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 4, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens according to embodiment 4 can achieve good imaging quality.
Example 5
An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic structural diagram of an optical imaging lens according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging lens includes, in order from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and image plane S15.
The first lens element E1 has positive refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and the object-side surface S3 is convex and the image-side surface S4 is concave. The third lens element E3 has positive refractive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has a negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive refractive power, and has a convex object-side surface S11 and a concave image-side surface S12. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In the present example, the total effective focal length f of the optical imaging lens is 3.31mm, the half Semi-FOV of the maximum field angle of the optical imaging lens is 44.25 °, the half ImgH of the diagonal length of the effective pixel region on the imaging plane S15 of the optical imaging lens is 3.43mm, the f-number FNO of the imaging lens is 1.80, and the total length TTL of the optical imaging lens is 4.35mm.
Table 9 shows a basic parameter table of the optical imaging lens of example 5, in which the units of the radius of curvature, thickness/distance, and focal length are millimeters (mm). Tables 10-1 and 10-2 show the coefficients of high-order terms that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.
Figure BDA0003779521900000182
Figure BDA0003779521900000191
TABLE 9
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -6.04E-03 -1.31E-03 -7.06E-04 -1.62E-04 -7.00E-05 -1.40E-05 -1.71E-05
S2 -5.85E-02 -7.89E-04 -2.20E-03 -2.91E-05 4.17E-05 -5.63E-05 -4.87E-05
S3 -4.57E-02 8.84E-03 -3.26E-03 6.37E-04 -4.22E-05 -8.71E-05 -7.34E-05
S4 -1.62E-02 9.71E-03 -1.97E-03 1.38E-03 2.64E-04 4.98E-05 -2.27E-05
S5 -1.54E-01 -1.14E-02 6.78E-04 3.69E-03 1.79E-03 6.25E-04 -8.12E-05
S6 -1.74E-01 -5.05E-03 1.27E-02 9.35E-03 3.64E-03 1.16E-03 -2.42E-05
S7 -1.02E-02 1.22E-02 9.14E-03 -1.29E-03 -1.83E-03 2.52E-04 1.74E-04
S8 4.27E-01 4.19E-02 2.83E-02 -2.46E-02 5.60E-03 4.34E-04 1.31E-03
S9 -5.88E-01 -1.36E-01 1.25E-01 -2.06E-02 2.68E-03 -7.40E-03 2.08E-03
S10 -1.52E+00 1.84E-01 4.68E-02 -3.49E-02 -2.92E-03 8.66E-03 -2.56E-03
S11 -4.90E+00 1.48E+00 -5.51E-01 1.91E-01 -4.84E-02 5.56E-04 2.82E-03
S12 -6.08E+00 1.35E+00 -3.97E-01 1.81E-01 -6.04E-02 8.88E-03 -1.37E-02
TABLE 10-1
Figure BDA0003779521900000192
Figure BDA0003779521900000201
TABLE 10-2
Fig. 10A shows on-axis chromatic aberration curves of the optical imaging lens of embodiment 5, which represent deviation of convergence focuses of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 5. Fig. 10C shows distortion curves of the optical imaging lens of embodiment 5, which represent distortion magnitude values corresponding to different fields of view. Fig. 10D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 5, which represents deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens according to embodiment 5 can achieve good imaging quality.
Example 6
An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic structural view of an optical imaging lens according to embodiment 6 of the present application.
As shown in fig. 11, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image plane S15.
The first lens element E1 has positive refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and the object-side surface S3 is convex and the image-side surface S4 is concave. The third lens element E3 has positive refractive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive refractive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has a negative refractive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The filter E7 has an object side surface S13 and an image side surface S14. 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 3.08mm, the half Semi-FOV of the maximum field angle of the optical imaging lens is 47.43 °, the half ImgH of the diagonal length of the effective pixel region on the imaging plane S15 of the optical imaging lens is 3.60mm, the f-number FNO of the imaging lens is 1.80, and the total length TTL of the optical imaging lens is 4.35mm.
Table 11 shows a basic parameter table of the optical imaging lens of example 6, in which the units of the radius of curvature, thickness/distance, and focal length are millimeters (mm). Tables 12-1 and 12-2 show high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.
Figure BDA0003779521900000202
Figure BDA0003779521900000211
TABLE 11
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -4.00E-03 -1.68E-03 -8.30E-04 -2.54E-04 -8.95E-05 -2.46E-05 -1.63E-05
S2 -7.01E-02 -1.88E-03 -3.29E-03 -3.49E-04 1.81E-04 5.52E-05 -7.47E-06
S3 -4.19E-02 9.60E-03 -3.43E-03 5.18E-04 2.49E-04 -2.31E-05 -7.62E-05
S4 -8.34E-03 9.10E-03 -2.28E-03 1.23E-03 3.31E-04 4.36E-05 9.51E-08
S5 -1.65E-01 -1.32E-02 -7.10E-06 3.16E-03 1.69E-03 5.61E-04 -5.28E-05
S6 -1.72E-01 -1.19E-03 1.05E-02 6.72E-03 2.50E-03 8.94E-04 1.29E-04
S7 -8.75E-02 2.06E-02 9.54E-03 -5.11E-05 -2.19E-03 2.17E-04 -1.73E-05
S8 2.86E-01 6.35E-03 3.08E-02 -3.23E-02 4.40E-03 8.66E-04 2.79E-03
S9 -6.75E-01 -1.56E-01 1.45E-01 -2.58E-02 2.68E-03 -8.04E-03 3.11E-03
S10 -1.68E+00 1.98E-01 6.50E-02 -5.18E-02 4.45E-03 6.80E-03 -1.61E-03
S11 -5.44E+00 1.63E+00 -6.03E-01 2.19E-01 -6.01E-02 3.86E-03 3.37E-03
S12 -7.18E+00 1.73E+00 -5.43E-01 2.31E-01 -8.63E-02 2.07E-02 -1.37E-02
TABLE 12-1
Figure BDA0003779521900000212
Figure BDA0003779521900000221
TABLE 12-2
Fig. 12A shows on-axis chromatic aberration curves of the optical imaging lens of embodiment 6, which represent deviation of convergence focuses of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 6. Fig. 12C shows distortion curves of the optical imaging lens of embodiment 6, which represent distortion magnitude values corresponding to different fields of view. Fig. 12D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 6, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens according to embodiment 6 can achieve good imaging quality.
Example 7
An optical imaging lens according to embodiment 7 of the present application is described below with reference to fig. 13 to 14D. Fig. 13 is a schematic view showing a configuration of an optical imaging lens according to embodiment 7 of the present application.
As shown in fig. 13, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image plane S15.
The first lens element E1 has positive refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and the object-side surface S3 is convex and the image-side surface S4 is concave. The third lens element E3 has positive refractive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has a negative refractive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane S15.
In the present example, the total effective focal length f of the optical imaging lens is 3.27mm, the half Semi-FOV of the maximum field angle of the optical imaging lens is 42.73 °, the half ImgH of the diagonal length of the effective pixel region on the imaging plane S15 of the optical imaging lens is 3.43mm, the f-number FNO of the imaging lens is 1.86, and the total length TTL of the optical imaging lens is 4.35mm.
Table 13 shows a basic parameter table of the optical imaging lens of example 7, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Tables 14-1 and 14-2 show high-order term coefficients that can be used for each aspherical mirror in example 7, wherein each aspherical mirror type can be defined by the formula (1) given in example 1 above.
Figure BDA0003779521900000222
Figure BDA0003779521900000231
Watch 13
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -1.18E-02 -2.27E-03 -7.30E-04 -1.16E-04 -4.95E-05 7.24E-06 -8.06E-06
S2 -6.99E-02 -1.70E-04 -1.73E-03 1.86E-04 9.86E-05 -1.37E-05 -3.23E-05
S3 -5.46E-02 9.88E-03 -3.19E-03 7.45E-04 4.61E-05 -6.35E-05 -6.93E-05
S4 -5.46E-02 9.88E-03 -3.19E-03 7.45E-04 4.61E-05 -6.35E-05 -6.93E-05
S5 -1.78E-01 -7.98E-03 1.69E-03 4.07E-03 2.07E-03 5.98E-04 -1.58E-04
S6 -1.97E-01 -6.68E-03 1.01E-02 7.28E-03 3.02E-03 1.02E-03 2.82E-05
S7 -6.31E-02 2.59E-02 7.89E-03 -9.54E-05 -3.35E-03 1.43E-03 2.71E-04
S8 3.35E-01 2.47E-02 6.80E-03 -2.80E-02 9.58E-03 3.38E-03 5.57E-05
S9 -6.29E-01 -1.06E-01 1.45E-01 -2.99E-02 -1.60E-04 -7.20E-03 4.07E-03
S10 -1.79E+00 1.20E-01 4.92E-02 -5.85E-02 7.10E-03 4.44E-03 -1.31E-03
S11 -4.38E+00 1.40E+00 -5.37E-01 1.95E-01 -5.27E-02 5.01E-03 2.13E-04
S12 -6.13E+00 1.44E+00 -4.25E-01 1.90E-01 -6.93E-02 1.95E-02 -1.70E-02
TABLE 14-1
Figure BDA0003779521900000232
Figure BDA0003779521900000241
TABLE 14-2
Fig. 14A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 7, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 14B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 7. Fig. 14C shows distortion curves of the optical imaging lens of embodiment 7, which represent distortion magnitudes corresponding to different fields of view. Fig. 14D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 7, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 14A to 14D, the optical imaging lens according to embodiment 7 can achieve good imaging quality.
In summary, examples 1 to 7 each satisfy the relationship shown in table 15.
Conditional expression (A) example 1 2 3 4 5 6 7
(f4-f5)/FNO(mm) 4.49 4.31 4.67 5.20 6.88 4.43 4.87
CT2/T12 2.74 2.57 2.46 2.62 2.08 2.65 2.41
f1/f*tan(Semi-FOV) 1.30 1.34 1.35 1.43 1.16 1.53 1.18
EPD/f/CT4(mm -1 ) 1.11 1.04 1.12 1.13 1.32 0.88 1.12
f1/R2+f5/R10 -1.45 -1.32 -1.68 -1.70 -2.26 -1.67 -1.54
R4/R10 2.64 2.58 2.46 2.22 2.73 4.11 2.03
(R7+R8)/CT4 -9.31 -8.86 -10.21 -10.44 -10.64 -7.66 -10.14
(R9+R10)/(R9-R10) 2.00 1.85 2.24 2.39 2.87 2.47 2.13
f4/R7 -0.95 -0.86 -0.90 -0.91 -2.26 -0.85 -0.98
(DT11+DT51)/CT1 4.56 5.18 4.72 4.90 4.79 5.90 4.46
TTL/(CT4+T45+CT5+T56) 3.97 3.93 3.95 4.05 4.07 3.60 3.97
(DT62-DT42)/(DT41-DT11) 3.43 3.30 2.75 3.15 3.78 3.54 2.82
DT61/DT11 2.90 2.86 3.07 3.06 2.64 3.10 2.94
f345/(ET3+ET4+ET5)/2 3.11 2.93 2.90 2.60 6.06 2.46 2.93
SAG42/(SAG51-SAG21) 1.76 1.83 1.59 1.65 1.85 2.20 1.54
SAG41/ET4 -1.28 -1.24 -1.30 -1.33 -0.89 -0.98 -1.24
(ET3+ET5+ET6)/TD 0.32 0.34 0.30 0.30 0.28 0.36 0.30
DT52/ET5 5.06 4.82 5.56 5.53 6.39 5.22 5.45
FNO*Semi-FOV(°) 80.84 79.88 84.84 84.86 79.66 85.38 79.51
(T34+T45)/(R5+R7) 0.16 0.10 0.31 0.30 0.31 0.12 0.45
Watch 15
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.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (18)

1. The optical imaging lens, in order from an object side to an image side along an optical axis, comprises:
a first lens having a positive optical power;
a second lens having a negative optical power;
a third lens;
a fourth lens having a positive refractive power, an object-side surface of which is concave;
a fifth lens having a negative refractive power, an image-side surface of which is concave;
a sixth lens; and
the optical imaging lens satisfies the following conditions:
3.5mm<(f4-f5)/FNO<7.5mm；
1.5<CT2/T12<3.5；
0.8<f1/f*tan(Semi-FOV)<2.0，
wherein f4 is an effective focal length of the fourth lens element, f5 is an effective focal length of the fifth lens element, FNO is an f-number of the optical imaging lens, CT2 is a center thickness of the second lens element, T12 is an air gap between the first lens element and the second lens element on the optical axis, f1 is an effective focal length of the first lens element, f is an effective focal length of the optical imaging lens element, and Semi-FOV is half of a maximum field angle of the optical imaging lens element.
2. The optical imaging lens according to claim 1, characterized in that the optical imaging lens satisfies:
0.4mm -1 <EPD/f/CT4<1.7mm -1 ，
and EPD is the diameter of the entrance pupil of the optical imaging lens, f is the effective focal length of the optical imaging lens, and CT4 is the central thickness of the fourth lens.
3. The optical imaging lens according to claim 1, characterized in that the optical imaging lens satisfies:
-2.6<f1/R2+f5/R10<-0.5，
wherein f1 is the central thickness of the first lens element, R2 is the radius of curvature of the image-side surface of the first lens element, f5 is the effective focal length of the fifth lens element, and R10 is the radius of curvature of the image-side surface of the fifth lens element.
4. The optical imaging lens of claim 3, wherein the optical imaging lens satisfies:
1.5<R4/R10<4.5，
wherein R4 is a curvature radius of the image-side surface of the second lens element, and R10 is a curvature radius of the image-side surface of the fifth lens element.
5. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies:
-11.0<(R7+R8)/CT4<-7.0，
wherein R7 is a radius of curvature of the object-side surface of the fourth lens element, R8 is a radius of curvature of the image-side surface of the fourth lens element, and CT4 is a central thickness of the fourth lens element.
6. The optical imaging lens of claim 3, wherein the optical imaging lens satisfies:
1.4<(R9+R10)/(R9-R10)<3.5，
wherein R9 is a radius of curvature of the object-side surface of the fifth lens element, and R10 is a radius of curvature of the image-side surface of the fifth lens element.
7. The optical imaging lens according to claim 1, characterized in that the optical imaging lens satisfies:
-2.5<f4/R7<-0.4，
wherein f4 is an effective focal length of the fourth lens, and R7 is a curvature radius of an object side surface of the fourth lens.
8. The optical imaging lens according to claim 1, characterized in that the optical imaging lens satisfies:
3.8<(DT11+DT51)/CT1<6.5，
wherein DT11 is an effective radius of the object-side surface of the first lens, DT51 is an effective radius of the object-side surface of the fifth lens, and CT1 is a center thickness of the first lens.
9. The optical imaging lens of claim 8, wherein the optical imaging lens satisfies:
3.0<TTL/(CT4+T45+CT5+T56)<4.5，
wherein, TTL is a distance along the optical axis from the object-side surface of the first lens element to the imaging surface of the optical imaging lens, CT4 is a central thickness of the fourth lens element, T45 is an air gap between the fourth lens element and the fifth lens element on the optical axis, CT5 is a central thickness of the fifth lens element, and T56 is an air gap between the fifth lens element and the sixth lens element on the optical axis.
10. The optical imaging lens according to claim 1, characterized in that the optical imaging lens satisfies:
2.0<(DT62-DT42)/(DT41-DT11)<4.5，
DT62 is an effective radius of the image-side surface of the sixth lens element, DT42 is an effective radius of the image-side surface of the fourth lens element, DT41 is an effective radius of the object-side surface of the fourth lens element, and DT11 is an effective radius of the object-side surface of the first lens element.
11. The optical imaging lens of claim 10, wherein the optical imaging lens satisfies:
2.0<DT61/DT11<3.7，
wherein DT61 is an effective radius of the object-side surface of the sixth lens, and DT11 is an effective radius of the object-side surface of the first lens.
12. The optical imaging lens according to claim 1, characterized in that the optical imaging lens satisfies:
2.0<f345/(ET3+ET4+ET5)/2<6.5，
wherein f345 is a combined focal length of the third lens, the fourth lens and the fifth lens, ET3 is an edge thickness at a maximum effective radius of the third lens, ET4 is an edge thickness at a maximum effective radius of the fourth lens, and ET5 is an edge thickness at a maximum effective radius of the fifth lens.
13. The optical imaging lens according to claim 1, characterized in that the optical imaging lens satisfies:
1.0<SAG42/(SAG51-SAG21)<2.7，
SAG42 is a distance from an intersection point of the fourth lens image-side surface and the optical axis to an effective radius vertex of the fourth lens image-side surface on the optical axis, SAG51 is a distance from an intersection point of the fifth lens object-side surface and the optical axis to an effective radius vertex of the fifth lens object-side surface on the optical axis, and SAG21 is a distance from an intersection point of the second lens object-side surface and the optical axis to an effective radius vertex of the fourth lens object-side surface on the optical axis.
14. The optical imaging lens according to claim 13, characterized in that the optical imaging lens satisfies:
-1.8<SAG41/ET4<-0.3，
SAG41 is the distance from the intersection point of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens on the optical axis, and ET4 is the edge thickness of the fourth lens at the maximum effective radius.
15. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies:
0<(ET3+ET5+ET6)/TD<0.5，
ET3 is an edge thickness of the third lens element at the maximum effective radius, ET5 is an edge thickness of the fifth lens element at the maximum effective radius, ET6 is an edge thickness of the sixth lens element at the maximum effective radius, and TD is a distance from the object-side surface of the first lens element to the image-side surface of the sixth lens element on the optical axis.
16. The optical imaging lens according to claim 15, wherein the optical imaging lens satisfies:
4.3<DT52/ET5<7.0，
wherein DT52 is an effective radius of the image side surface of the fifth lens, and ET5 is an edge thickness at the maximum effective radius of the fifth lens.
17. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies:
77.0°<FNO*Semi-FOV<87.0°，
and FNO is the f-number of the optical imaging lens, and Semi-FOV is half of the maximum field angle of the optical imaging lens.
18. The optical imaging lens according to any one of claims 1 to 17, characterized in that the optical imaging lens satisfies:
0<(T34+T45)/(R5+R7)<0.8，
wherein T34 is an air gap between the third lens element and the fourth lens element on the optical axis, T45 is an air gap between the fourth lens element and the fifth lens element on the optical axis, R5 is a radius of curvature of the object-side surface of the third lens element, and R7 is a radius of curvature of the object-side surface of the fourth lens element.
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