CN213276106U - Optical imaging lens - Google Patents

Optical imaging lens Download PDF

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Publication number
CN213276106U
CN213276106U CN202022687376.8U CN202022687376U CN213276106U CN 213276106 U CN213276106 U CN 213276106U CN 202022687376 U CN202022687376 U CN 202022687376U CN 213276106 U CN213276106 U CN 213276106U
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lens
optical imaging
image
optical axis
optical
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张爽
张晓彬
闻人建科
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: the first lens with positive focal power has a convex object-side surface and a plane image-side surface; an iris diaphragm; a second lens having a negative optical power; a third lens having optical power; the image side surface of the fourth lens is a convex surface; a fifth lens having optical power; a sixth lens having positive optical power; and a seventh lens having a negative optical power. The first lens is a glass lens. The image side surface of the first lens is a spherical mirror surface.

Description

Optical imaging lens
Technical Field
The application relates to the field of optical elements, in particular to an optical imaging lens.
Background
In recent years, with the rapid development of portable electronic products such as smart phones, the shooting functions of the portable electronic products such as smart phones are gradually powerful, and the shooting effect is better. Because portable electronic products such as smart phones are small in size, light in weight and portable, industries such as camera shooting and photography tend to select portable electronic products such as smart phones as main tools for photography.
At present, mobile phone photography is not only used for recording the life of people, but also is even widely embedded into some brand promotion documents. Meanwhile, with the development of the mobile phone photography industry, higher requirements are put forward on the camera lens shot by the mobile phone in the market. The traditional mobile phone lens cannot simultaneously take long depth of field when long-range scenes are shot, and can be well-arranged when short-range scenes are shot. Therefore, how to meet the requirements of lens miniaturization and realizing different shooting scenes is one of the problems to be solved by many lens designers at present.
SUMMERY OF THE UTILITY MODEL
The present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: the first lens with positive focal power has a convex object-side surface and a plane image-side surface; an iris diaphragm; a second lens having a negative optical power; a third lens having optical power; the image side surface of the fourth lens is a convex surface; a fifth lens having optical power; a sixth lens having positive optical power; and a seventh lens having a negative optical power. The first lens is a glass lens, and the image side surface of the first lens is a spherical mirror surface.
In one embodiment, the object-side surface of the second lens element and the image-side surface of the seventh lens element have at least one aspheric mirror surface.
In one embodiment, the maximum entrance pupil diameter EPDmax of the optical imaging lens, the minimum entrance pupil diameter EPDmin of the optical imaging lens, and the effective focal length f1 of the first lens may satisfy: f 1/(EPDMmax-EPDMmin) is more than 4.0 and less than 5.0.
In one embodiment, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, and the effective focal length f7 of the seventh lens may satisfy: 1.0 < f3/(f2+ f7) < 2.0.
In one embodiment, the effective focal length f4 of the fourth lens and the radius of curvature R7 of the object side of the fourth lens may satisfy: 1.2 < f4/R7 < 1.7.
In one embodiment, the radius of curvature R12 of the image-side surface of the sixth lens, the radius of curvature R11 of the object-side surface of the sixth lens, and the effective focal length f6 of the sixth lens may satisfy: 1.2 < (R11+ R12)/f6 < 1.7.
In one embodiment, the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens may satisfy: 1.8 < R3/R4 < 2.3.
In one embodiment, the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R6 of the image-side surface of the third lens may satisfy: 1.4 < R5/R6 < 2.0.
In one embodiment, a central thickness CT1 of the first lens on the optical axis, a central thickness CT2 of the second lens on the optical axis, a central thickness CT3 of the third lens on the optical axis, a separation distance T12 of the first lens and the second lens on the optical axis, and a separation distance T23 of the second lens and the third lens on the optical axis may satisfy: 0.8 < (CT1+ T12)/(CT2+ T23+ CT3) < 1.2.
In one embodiment, the effective radius DT31 of the object-side surface of the third lens, the effective radius DT32 of the image-side surface of the third lens, and the effective radius DT11 of the object-side surface of the first lens may satisfy: 1.6 < (DT31+ DT32)/DT11 < 2.0.
In one embodiment, the combined focal length f12 of the first and second lenses and the combined focal length f34 of the third and fourth lenses may satisfy: 2.9 < f34/f12 < 4.9.
In one embodiment, the combined focal length f56 of the fifth lens and the sixth lens, the central thickness CT5 of the fifth lens on the optical axis, and the central thickness CT6 of the sixth lens on the optical axis may satisfy: 6.5 < f56/(CT5+ CT6) < 7.5.
In one embodiment, a distance SAG52 on the optical axis from the intersection point of the image-side surface of the fifth lens and the optical axis to the effective radius vertex of the image-side surface of the fifth lens, a 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, a distance SAG72 on the optical axis from the intersection point of the image-side surface of the seventh lens and the effective radius vertex of the image-side surface of the seventh lens and a distance SAG71 on the optical axis from the intersection point of the object-side surface of the seventh lens and the optical axis to the effective radius vertex of the object-side surface of the seventh lens may satisfy: 1.1 < (SAG71+ SAG72)/(SAG51+ SAG52) < 1.8.
In one embodiment, the fifth lens element has a convex object-side surface and a concave image-side surface.
In one embodiment, the sixth lens element has a convex object-side surface and a concave image-side surface.
Another aspect of the present application provides an optical imaging lens. The optical imaging lens sequentially comprises from an object side to an image side along an optical axis: the first lens with positive focal power has a convex object-side surface and a plane image-side surface; an iris diaphragm; a second lens having a negative optical power; a third lens having optical power; the image side surface of the fourth lens is a convex surface; a fifth lens having optical power; a sixth lens having positive optical power; and a seventh lens having a negative optical power. The maximum entrance pupil diameter EPDmax of the optical imaging lens, the minimum entrance pupil diameter EPDmin of the optical imaging lens, and the effective focal length f1 of the first lens may satisfy: f 1/(EPDMmax-EPDMmin) is more than 4.0 and less than 5.0.
In one embodiment, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, and the effective focal length f7 of the seventh lens may satisfy: 1.0 < f3/(f2+ f7) < 2.0.
In one embodiment, the effective focal length f4 of the fourth lens and the radius of curvature R7 of the object side of the fourth lens may satisfy: 1.2 < f4/R7 < 1.7.
In one embodiment, the radius of curvature R12 of the image-side surface of the sixth lens, the radius of curvature R11 of the object-side surface of the sixth lens, and the effective focal length f6 of the sixth lens may satisfy: 1.2 < (R11+ R12)/f6 < 1.7.
In one embodiment, the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens may satisfy: 1.8 < R3/R4 < 2.3.
In one embodiment, the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R6 of the image-side surface of the third lens may satisfy: 1.4 < R5/R6 < 2.0.
In one embodiment, a central thickness CT1 of the first lens on the optical axis, a central thickness CT2 of the second lens on the optical axis, a central thickness CT3 of the third lens on the optical axis, a separation distance T12 of the first lens and the second lens on the optical axis, and a separation distance T23 of the second lens and the third lens on the optical axis may satisfy: 0.8 < (CT1+ T12)/(CT2+ T23+ CT3) < 1.2.
In one embodiment, the effective radius DT31 of the object-side surface of the third lens, the effective radius DT32 of the image-side surface of the third lens, and the effective radius DT11 of the object-side surface of the first lens may satisfy: 1.6 < (DT31+ DT32)/DT11 < 2.0.
In one embodiment, the combined focal length f12 of the first and second lenses and the combined focal length f34 of the third and fourth lenses may satisfy: 2.9 < f34/f12 < 4.9.
In one embodiment, the combined focal length f56 of the fifth lens and the sixth lens, the central thickness CT5 of the fifth lens on the optical axis, and the central thickness CT6 of the sixth lens on the optical axis may satisfy: 6.5 < f56/(CT5+ CT6) < 7.5.
In one embodiment, a distance SAG52 on the optical axis from the intersection point of the image-side surface of the fifth lens and the optical axis to the effective radius vertex of the image-side surface of the fifth lens, a 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, a distance SAG72 on the optical axis from the intersection point of the image-side surface of the seventh lens and the effective radius vertex of the image-side surface of the seventh lens and a distance SAG71 on the optical axis from the intersection point of the object-side surface of the seventh lens and the optical axis to the effective radius vertex of the object-side surface of the seventh lens may satisfy: 1.1 < (SAG71+ SAG72)/(SAG51+ SAG52) < 1.8.
In one embodiment, the first lens is a glass lens, and an image-side surface of the first lens is a spherical mirror surface.
In one embodiment, the fifth lens element has a convex object-side surface and a concave image-side surface.
In one embodiment, the sixth lens element has a convex object-side surface and a concave image-side surface.
The optical imaging lens adopts a plurality of lenses (for example, seven lenses), and has at least one beneficial effect of miniaturization, compact structure, iris diaphragm, high imaging quality and the like by reasonably distributing the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like.
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 is a schematic view showing a configuration of an optical imaging lens having an aperture value of 1.39 according to embodiment 1 of the present application;
fig. 2 is a schematic structural view showing an optical imaging lens having an aperture value of 2.04 according to embodiment 1 of the present application;
fig. 3A to 3C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of example 1 having an aperture value of 1.39, respectively;
fig. 4A to 4C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of example 1 having an aperture value of 2.04, respectively;
fig. 5 is a schematic view showing a configuration of an optical imaging lens having an aperture value of 1.39 according to embodiment 2 of the present application;
fig. 6 is a schematic diagram showing a configuration of an optical imaging lens having an aperture value of 2.05 according to embodiment 2 of the present application;
fig. 7A to 7C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of example 2 having an aperture value of 1.39, respectively;
fig. 8A to 8C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of example 2 having an aperture value of 2.05, respectively;
fig. 9 is a schematic view showing a configuration of an optical imaging lens having an aperture value of 1.39 according to embodiment 3 of the present application;
fig. 10 is a schematic view showing a configuration of an optical imaging lens having an aperture value of 2.04 according to embodiment 3 of the present application;
fig. 11A to 11C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of an optical imaging lens of example 3 having an aperture value of 1.39, respectively;
fig. 12A to 12C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of example 3 having an aperture value of 2.04, respectively;
fig. 13 is a schematic view showing a configuration of an optical imaging lens having an aperture value of 1.39 according to embodiment 4 of the present application;
fig. 14 is a schematic structural view showing an optical imaging lens having an aperture value of 2.04 according to embodiment 4 of the present application;
fig. 15A to 15C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of an optical imaging lens of example 4 having an aperture value of 1.39, respectively;
fig. 16A to 16C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of example 4 having an aperture value of 2.04, respectively;
fig. 17 is a schematic view showing a configuration of an optical imaging lens having an aperture value of 1.40 according to embodiment 5 of the present application;
fig. 18 is a schematic structural view showing an optical imaging lens of aperture value 2.04 according to embodiment 5 of the present application;
fig. 19A to 19C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of example 5 having an aperture value of 1.40, respectively;
fig. 20A to 20C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of example 5 having an aperture value of 2.04, respectively;
fig. 21 is a schematic view showing a configuration of an optical imaging lens having an aperture value of 1.40 according to embodiment 6 of the present application;
fig. 22 is a schematic diagram showing a configuration of an optical imaging lens having an aperture value of 2.05 according to embodiment 6 of the present application;
fig. 23A to 23C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of an optical imaging lens of example 6 having an aperture value of 1.40, respectively; and
fig. 24A to 24C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of example 6 having an aperture value of 2.05, 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 an example or illustration.
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 features, principles, and other aspects of the present application are described in detail below.
An optical imaging lens according to an exemplary embodiment of the present application may include seven lenses having optical powers, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, respectively. The seven lenses are arranged along the optical axis in sequence from the object side to the image side. Any adjacent two lenses of the first lens to the seventh lens may have a spacing distance therebetween.
In an exemplary embodiment, the first lens may have a positive optical power, and the object side surface thereof may be a convex surface and the image side surface thereof may be a planar surface; the second lens can have negative focal power; the third lens may have a positive optical power or a negative optical power; the fourth lens can have positive focal power, and the image side surface of the fourth lens can be a convex surface; the fifth lens may have a positive power or a negative power; the sixth lens may have a positive optical power; and the seventh lens may have a negative optical power.
In an exemplary embodiment, an optical imaging lens according to the present application further includes an iris disposed between the first lens and the second lens. As shown in fig. 1 and 2, the optical imaging lens is provided with the variable stop STO, so that the effect of continuously varying the magnitude of the aperture value of the optical imaging lens can be achieved, and the aperture value of the lens has a wide variation range.
In an exemplary embodiment, the first lens has a positive power and can well converge light. The object side surface of the first lens is a convex surface, the image side surface of the first lens is a plane, so that the optical imaging lens can be ensured that light rays can be stably emitted into the optical imaging lens, and the image side surface of the first lens is a plane and can be well matched with the diaphragm surface. Through the reasonable distribution of the focal power and the surface type of the second lens to the seventh lens, the structure of the optical lens can be more compact, and the light transmission is more stable.
In an exemplary embodiment, the first lens may be a glass lens; at least one of the second lens element to the seventh lens element may be a plastic lens element. The first lens adopts a glass lens, so that the optical imaging lens can be formed by combining the glass lens and the plastic lens, and the optical performance of the lens is improved.
In an exemplary embodiment, the image side surface of the first lens may be a spherical mirror surface. Therefore, the iris diaphragm can stably move at the image side surface of the first lens, and the lens has stronger stability in the process of switching the size of the aperture.
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 seventh 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 in imaging can be eliminated as much as possible, and the imaging quality is further 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 seventh lens is an aspheric mirror surface. Optionally, the object-side surface of the first lens and the object-side surface and the image-side surface of each of the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are aspheric mirror surfaces.
In an exemplary embodiment, the object-side surface of the fifth lens element may be convex, and the image-side surface may be concave. The surface type arrangement of the fifth lens can ensure that light is transmitted smoothly, and the phenomenon that a lens is unstable due to the fact that a light transmission path is too steep is avoided. Meanwhile, on the basis that the lens has a certain total length, the surface type arrangement of the fifth lens is also beneficial to enlarging the imaging surface of the lens.
In an exemplary embodiment, the object-side surface of the sixth lens element may be convex, and the image-side surface may be concave. The surface type of the sixth lens can ensure that light is transmitted smoothly, and the phenomenon that a lens is unstable due to the fact that a light transmission path is too steep is avoided. Meanwhile, on the basis that the lens has a certain total length, the plane type arrangement of the sixth lens is also beneficial to enlarging the imaging surface of the lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 4.0 < f 1/(EPDMmax-EPDMmin) < 5.0, where EPDMmax is the maximum entrance pupil diameter of the optical imaging lens, EPDMmin is the minimum entrance pupil diameter of the optical imaging lens, and f1 is the effective focal length of the first lens. More specifically, f1, EPDmax, and EPDmin may further satisfy: 4.1 < f 1/(EPDMmax-EPDMmin) < 4.4. The requirements that f 1/(EPDMmax-EPDMmin) is more than 4.0 and less than 5.0 are met, so that the optical imaging lens has good imaging performance under large aperture and small aperture.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.0 < f3/(f2+ f7) < 2.0, where f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, and f7 is the effective focal length of the seventh lens. More specifically, f3, f2, and f7 may further satisfy: 1.3 < f3/(f2+ f7) < 1.7. Satisfying 1.0 < f3/(f2+ f7) < 2.0 is advantageous for comprehensively correcting spherical aberration caused by the three lenses by changing the amount of contribution of spherical aberration among the third lens, the second lens and the seventh lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.2 < f4/R7 < 1.7, wherein f4 is the effective focal length of the fourth lens and R7 is the radius of curvature of the object side of the fourth lens. More specifically, f4 and R7 may further satisfy: f4/R7 is more than 1.3 and less than 1.6. Satisfying 1.2 < f4/R7 < 1.7, the shape of the fourth lens can be reasonably set, the spherical aberration caused by the fourth lens is reduced, and meanwhile, the fourth lens and the third lens can be combined by changing the shape of the fourth lens so as to comprehensively correct the chromatic aberration of the lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.2 < (R11+ R12)/f6 < 1.7, wherein R12 is the radius of curvature of the image-side surface of the sixth lens, R11 is the radius of curvature of the object-side surface of the sixth lens, and f6 is the effective focal length of the sixth lens. Satisfy 1.2 < (R11+ R12)/f6 < 1.7, be favorable to optimizing the edge angle of sixth lens, and then the edge angle of accessible control sixth lens prevents that light transmission is unusual or make mistakes, is favorable to rationally setting up the shape of sixth lens simultaneously to reduce the field curvature of lens, reduce the crisscross phenomenon inside and outside of lens field curvature.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.8 < R3/R4 < 2.3, wherein R3 is the radius of curvature of the object-side surface of the second lens and R4 is the radius of curvature of the image-side surface of the second lens. More specifically, R3 and R4 may further satisfy: 1.9 < R3/R4 < 2.2. Satisfy 1.8 < R3/R4 < 2.3, can rationally set up the focal power of second lens to accessible indirect distribution focal power makes the light of passing through first lens transmission gently transition, finally realizes reducing the effect of the holistic aberration of camera lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.4 < R5/R6 < 2.0, wherein R5 is the radius of curvature of the object-side surface of the third lens and R6 is the radius of curvature of the image-side surface of the third lens. More specifically, R5 and R6 may further satisfy: 1.5 < R5/R6 < 1.7. The optical power of the third lens can be reasonably set, the shape of the third lens can be optimized, and the spherical aberration and the coma aberration of the lens can be reduced by combining the second lens, wherein R5/R6 is more than 1.4 and less than 2.0.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.8 < (CT1+ T12)/(CT2+ T23+ CT3) < 1.2, wherein CT1 is a central thickness of the first lens on the optical axis, CT2 is a central thickness of the second lens on the optical axis, CT3 is a central thickness of the third lens on the optical axis, T12 is a spaced distance of the first lens and the second lens on the optical axis, and T23 is a spaced distance of the second lens and the third lens on the optical axis. More specifically, CT1, T12, CT2, T23, and CT3 may further satisfy: 0.9 < (CT1+ T12)/(CT2+ T23+ CT3) < 1.1. Satisfy 0.8 < (CT1+ T12)/(CT2+ T23+ CT3) < 1.2, can reduce the whole curvature of field and spherical aberration of lens through controlling the parameter of the lens of first lens to third lens, still be favorable to reducing the sensitivity of lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.6 < (DT31+ DT32)/DT11 < 2.0, wherein DT31 is the effective radius of the object-side surface of the third lens, DT32 is the effective radius of the image-side surface of the third lens, and DT11 is the effective radius of the object-side surface of the first lens. More specifically, DT31, DT32 and DT11 may further satisfy: 1.6 < (DT31+ DT32)/DT11 < 1.8. Satisfy 1.6 < (DT31+ DT32)/DT11 < 2.0, be favorable to light to continue stable transmission after the first lens is assembled, be favorable to reducing the segment difference between first lens to the third lens simultaneously, reduce the sensitivity of lens, promote optical imaging lens's yield.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2.9 < f34/f12 < 4.9, wherein f12 is the combined focal length of the first lens and the second lens, and f34 is the combined focal length of the third lens and the fourth lens. The requirement that f34/f12 is more than 2.9 and less than 4.9 is met, the focal powers of the first lens and the fourth lens can be reasonably distributed, the aberration of the lens is reduced, and the optical performance of the lens is improved.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 6.5 < f56/(CT5+ CT6) < 7.5, where f56 is the combined focal length of the fifth lens and the sixth lens, CT5 is the central thickness of the fifth lens on the optical axis, and CT6 is the central thickness of the sixth lens on the optical axis. More specifically, f56, CT5, and CT6 may further satisfy: 6.5 < f56/(CT5+ CT6) < 7.1. Satisfying 6.5 < f56/(CT5+ CT6) < 7.5 is beneficial to comprehensively distributing the relation between the focal power and the center thickness of the fifth lens and the sixth lens and simultaneously is beneficial to reducing spherical aberration and curvature of field.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.1 < (SAG71+ SAG72)/(SAG51+ SAG52) < 1.8, wherein SAG52 is a distance on an optical axis from an intersection point of an image side surface of the fifth lens and an optical axis to an effective radius vertex of the image side surface of the fifth lens, SAG51 is a distance on the optical axis from an intersection point of an object side surface of the fifth lens and the optical axis to an effective radius vertex of the object side surface of the fifth lens, SAG72 is a distance on the optical axis from an intersection point of an image side surface of the seventh lens and the optical axis to an effective radius vertex of the image side surface of the seventh lens, and SAG71 is a distance on the optical axis from an intersection point of an object side surface of the seventh lens and the optical axis to an effective radius vertex of the object side surface of the seventh lens. Satisfy 1.1 < (SAG71+ SAG72)/(SAG51+ SAG52) < 1.8, be favorable to reducing the ghost phenomenon that fifth lens and seventh lens produced, still be favorable to rationally setting up the shape of fifth lens and seventh lens simultaneously, reduce the distortion of lens, reduce astigmatism and the field curvature of lens.
In an exemplary embodiment, an optical imaging lens according to the present application may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on an imaging surface.
The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, seven lenses as described above. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like, the volume of the optical imaging lens can be effectively reduced, the processability of the optical imaging lens can be improved, and the optical imaging lens is more favorable for production and processing and can be suitable for portable electronic products. The optical imaging lens has the characteristics of ultrathin thickness, large image surface, variable aperture, compact structure, miniaturization, good imaging quality and the like, and can well meet the use requirements of various portable electronic products in a shooting scene.
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 seven lenses are exemplified in the embodiment, the optical imaging lens is not limited to include seven 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 4C. Fig. 1 and 2 show schematic structural views of optical imaging lenses having aperture values of 1.39 and 2.04 according to embodiment 1 of the present application, respectively.
As shown in fig. 1 and fig. 2, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, an iris STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a planar image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative 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 convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
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 BDA0002786976420000091
TABLE 1
In the present example, the total effective focal length F of the optical imaging lens is 4.86mm, the total length of the optical imaging lens (the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17 of the optical imaging lens) TTL is 6.55mm, the half of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens ImgH is 4.18mm, the minimum value FNOmin of the F number of the optical imaging lens is 1.39, and the maximum value FNOmax of the F number of the optical imaging lens is 2.04. When the F number is the minimum value, the relative aperture of the optical imaging lens is the maximum; when the F number takes a maximum value, the relative aperture of the optical imaging lens is minimum.
In embodiment 1, the object-side surface S1 of the first lens E1 and any one of the second lens E2 to the seventh lens E7 has an aspheric surface on both the object-side surface and the image-side surface, and the surface type x of each aspheric lens can be defined by, but is not limited to, the following aspheric formula:
Figure BDA0002786976420000101
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. The high-order term coefficients A usable for the aspherical mirror surfaces S1, S3-S14 in example 1 are shown in the following tables 2-1 and 2-24、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30、。
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -4.7848E-03 1.6962E-02 -5.7369E-02 1.2554E-01 -1.9338E-01 2.1150E-01 -1.6495E-01
S3 -4.8273E-02 5.4365E-02 -1.9774E-01 6.7581E-01 -1.5599E+00 2.4929E+00 -2.8342E+00
S4 -5.0924E-02 -1.2785E-02 1.8145E-01 -6.5504E-01 1.4676E+00 -2.1926E+00 2.2330E+00
S5 -4.1765E-02 9.8774E-02 -5.1832E-01 1.5205E+00 -3.0790E+00 4.4538E+00 -4.6859E+00
S6 -4.0967E-02 9.6008E-02 -3.0595E-01 6.4213E-01 -9.6296E-01 1.0490E+00 -8.2746E-01
S7 -4.2770E-02 8.2756E-02 -1.9421E-01 3.3974E-01 -3.9291E-01 2.7752E-01 -8.2242E-02
S8 -2.8118E-02 -7.0297E-02 3.7158E-01 -1.1194E+00 2.2119E+00 -3.0278E+00 2.9528E+00
S9 -2.3254E-02 -5.1223E-02 1.0351E-01 -6.8991E-02 -7.2195E-02 2.0587E-01 -2.2584E-01
S10 -2.8006E-02 -2.0817E-01 3.8756E-01 -4.2586E-01 3.3037E-01 -1.9126E-01 8.4476E-02
S11 5.6167E-02 -1.5189E-01 1.6438E-01 -1.4244E-01 9.9935E-02 -5.4082E-02 2.1579E-02
S12 6.4247E-02 2.2455E-02 -1.3229E-01 1.4948E-01 -9.5986E-02 4.0436E-02 -1.1835E-02
S13 -1.6670E-01 6.2549E-02 -2.3275E-02 7.9914E-03 -1.0156E-03 -4.0157E-04 2.2279E-04
S14 -2.5900E-01 1.6979E-01 -1.0170E-01 4.9938E-02 -1.8735E-02 5.2082E-03 -1.0613E-03
TABLE 2-1
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 9.1568E-02 -3.5792E-02 9.6047E-03 -1.6818E-03 1.7289E-04 -7.9086E-06 0.0000E+00
S3 2.3261E+00 -1.3824E+00 5.8930E-01 -1.7564E-01 3.4742E-02 -4.0962E-03 2.1779E-04
S4 -1.5543E+00 7.2695E-01 -2.1826E-01 3.7973E-02 -2.9082E-03 0.0000E+00 0.0000E+00
S5 3.6014E+00 -2.0018E+00 7.8293E-01 -2.0407E-01 3.1767E-02 -2.2301E-03 0.0000E+00
S6 4.6850E-01 -1.8747E-01 5.1571E-02 -9.2669E-03 9.8109E-04 -4.6681E-05 0.0000E+00
S7 -4.0902E-02 5.5257E-02 -2.6896E-02 7.0816E-03 -9.9463E-04 5.8398E-05 0.0000E+00
S8 -2.0791E+00 1.0588E+00 -3.8601E-01 9.8125E-02 -1.6503E-02 1.6489E-03 -7.4027E-05
S9 1.5189E-01 -6.8635E-02 2.1311E-02 -4.4975E-03 6.1709E-04 -4.9656E-05 1.7776E-06
S10 -2.8708E-02 7.4892E-03 -1.4739E-03 2.1080E-04 -2.0533E-05 1.2094E-06 -3.2316E-08
S11 -6.2389E-03 1.2982E-03 -1.9220E-04 1.9728E-05 -1.3331E-06 5.3292E-08 -9.5408E-10
S12 2.4725E-03 -3.7175E-04 3.9918E-05 -2.9837E-06 1.4727E-07 -4.3069E-09 5.6391E-11
S13 -5.2817E-05 7.6776E-06 -7.3859E-07 4.7447E-08 -1.9661E-09 4.7667E-11 -5.1469E-13
S14 1.5799E-04 -1.7106E-05 1.3309E-06 -7.2512E-08 2.6271E-09 -5.6889E-11 5.5741E-13
Tables 2 to 2
Fig. 3A and 4A show axial chromatic aberration curves of optical imaging lenses of example 1 having aperture values of 1.39 and 2.04, respectively, which represent convergent focus deviations of light rays of different wavelengths after passing through the lenses. Fig. 3B and 4B show astigmatism curves representing meridional field curvature and sagittal field curvature of the optical imaging lens of example 1 with aperture values of 1.39 and 2.04, respectively. Fig. 3C and 4C show distortion curves of the optical imaging lens of embodiment 1 having aperture values of 1.39 and 2.04, respectively, which represent distortion magnitude values corresponding to different image heights. As can be seen from fig. 3A to 4C, the optical imaging lens 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. 5 to 8C. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 5 and 6 are schematic structural views showing optical imaging lenses having aperture values of 1.39 and 2.05 according to embodiment 2 of the present application, respectively.
As shown in fig. 5 and fig. 6, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, an iris STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a planar image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative 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 convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In the present example, the total effective focal length F of the optical imaging lens is 4.86mm, the total length TTL of the optical imaging lens is 6.55mm, the half of the diagonal length ImgH of the effective pixel region on the imaging plane of the optical imaging lens is 4.18mm, the minimum value FNOmin of the F-number of the optical imaging lens is 1.39, and the maximum value FNOmax of the F-number of the optical imaging lens is 2.05. When the F number is the minimum value, the relative aperture of the optical imaging lens is the maximum; when the F number takes a maximum value, the relative aperture of the optical imaging lens is minimum.
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 the 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 BDA0002786976420000111
Figure BDA0002786976420000121
TABLE 3
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -4.9863E-03 1.8618E-02 -6.4308E-02 1.4308E-01 -2.2263E-01 2.4505E-01 -1.9201E-01
S3 -4.7633E-02 5.1862E-02 -1.8812E-01 6.6047E-01 -1.5630E+00 2.5505E+00 -2.9498E+00
S4 -5.1340E-02 -9.0552E-03 1.6267E-01 -5.9091E-01 1.3235E+00 -1.9754E+00 2.0103E+00
S5 -4.4593E-02 9.1661E-02 -4.6992E-01 1.3295E+00 -2.6039E+00 3.6690E+00 -3.7928E+00
S6 -4.1880E-02 9.3213E-02 -3.0158E-01 6.4702E-01 -1.0113E+00 1.1726E+00 -9.9994E-01
S7 -4.1254E-02 8.4082E-02 -2.1479E-01 4.1800E-01 -5.7148E-01 5.4150E-01 -3.4383E-01
S8 -2.8175E-02 -6.5269E-02 3.4535E-01 -1.0363E+00 2.0416E+00 -2.7913E+00 2.7233E+00
S9 -2.3808E-02 -5.2377E-02 1.0653E-01 -7.1865E-02 -7.1241E-02 2.0706E-01 -2.2799E-01
S10 -2.4718E-02 -2.1143E-01 3.9059E-01 -4.2792E-01 3.3143E-01 -1.9171E-01 8.4645E-02
S11 6.2021E-02 -1.5556E-01 1.6445E-01 -1.4040E-01 9.7666E-02 -5.2568E-02 2.0883E-02
S12 6.8744E-02 1.7348E-02 -1.2803E-01 1.4623E-01 -9.3962E-02 3.9511E-02 -1.1533E-02
S13 -1.6494E-01 6.1667E-02 -2.2956E-02 7.8596E-03 -1.0007E-03 -3.8495E-04 2.1342E-04
S14 -2.5987E-01 1.7241E-01 -1.0525E-01 5.2705E-02 -2.0119E-02 5.6764E-03 -1.1721E-03
TABLE 4-1
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 1.0700E-01 -4.1969E-02 1.1300E-02 -1.9855E-03 2.0480E-04 -9.4013E-06 0.0000E+00
S3 2.4548E+00 -1.4752E+00 6.3462E-01 -1.9058E-01 3.7947E-02 -4.5014E-03 2.4076E-04
S4 -1.3990E+00 6.5452E-01 -1.9667E-01 3.4258E-02 -2.6277E-03 0.0000E+00 0.0000E+00
S5 2.8888E+00 -1.6035E+00 6.3002E-01 -1.6566E-01 2.6080E-02 -1.8539E-03 0.0000E+00
S6 6.1925E-01 -2.7386E-01 8.4143E-02 -1.7069E-02 2.0592E-03 -1.1220E-04 0.0000E+00
S7 1.3635E-01 -2.7173E-02 -1.0037E-03 1.8310E-03 -3.7400E-04 2.5917E-05 0.0000E+00
S8 -1.9207E+00 9.8060E-01 -3.5860E-01 9.1476E-02 -1.5442E-02 1.5488E-03 -6.9804E-05
S9 1.5367E-01 -6.9564E-02 2.1637E-02 -4.5738E-03 6.2859E-04 -5.0664E-05 1.8167E-06
S10 -2.8765E-02 7.5049E-03 -1.4771E-03 2.1129E-04 -2.0582E-05 1.2124E-06 -3.2398E-08
S11 -6.0129E-03 1.2461E-03 -1.8373E-04 1.8782E-05 -1.2640E-06 5.0322E-08 -8.9724E-10
S12 2.4022E-03 -3.6005E-04 3.8539E-05 -2.8716E-06 1.4129E-07 -4.1192E-09 5.3767E-11
S13 -5.0356E-05 7.2820E-06 -6.9684E-07 4.4529E-08 -1.8354E-09 4.4264E-11 -4.7543E-13
S14 1.7663E-04 -1.9346E-05 1.5218E-06 -8.3769E-08 3.0638E-09 -6.6911E-11 6.6048E-13
TABLE 4-2
Fig. 7A and 8A show axial chromatic aberration curves of optical imaging lenses of example 2 having aperture values of 1.39 and 2.05, respectively, which represent convergent focus deviations of light rays of different wavelengths after passing through the lenses. Fig. 7B and 8B show astigmatism curves representing meridional field curvature and sagittal field curvature of the optical imaging lens of example 2 with aperture values of 1.39 and 2.05, respectively. Fig. 7C and 8C show distortion curves of the optical imaging lens of embodiment 2 having aperture values of 1.39 and 2.05, respectively, which represent distortion magnitude values corresponding to different image heights. As can be seen from fig. 7A to 8C, 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. 9 to 12C. Fig. 9 and 10 are schematic structural views showing optical imaging lenses having aperture values of 1.39 and 2.04 according to embodiment 3 of the present application, respectively.
As shown in fig. 9 and 10, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, an iris STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a planar image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative 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 convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In the present example, the total effective focal length F of the optical imaging lens is 4.86mm, the total length TTL of the optical imaging lens is 6.55mm, the half of the diagonal length ImgH of the effective pixel region on the imaging plane of the optical imaging lens is 4.18mm, the minimum value FNOmin of the F-number of the optical imaging lens is 1.39, and the maximum value FNOmax of the F-number of the optical imaging lens is 2.04. When the F number is the minimum value, the relative aperture of the optical imaging lens is the maximum; when the F number takes a maximum value, the relative aperture of the optical imaging lens is minimum.
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 the coefficients of high-order terms that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above
Figure BDA0002786976420000131
Figure BDA0002786976420000141
TABLE 5
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -4.8883E-03 1.8142E-02 -6.6610E-02 1.5637E-01 -2.5392E-01 2.8905E-01 -2.3266E-01
S3 -4.1585E-02 4.4079E-02 -1.5481E-01 5.3990E-01 -1.2594E+00 2.0087E+00 -2.2539E+00
S4 -4.6808E-02 -9.5999E-03 1.4569E-01 -5.1701E-01 1.1433E+00 -1.6973E+00 1.7285E+00
S5 -3.9110E-02 1.5993E-02 -1.1997E-01 2.7053E-01 -3.8180E-01 3.6725E-01 -2.7897E-01
S6 -2.5558E-02 -8.5712E-03 3.0620E-02 -8.1326E-02 1.0316E-01 -3.4060E-02 -7.0737E-02
S7 -2.3205E-02 2.1812E-02 -6.0565E-02 1.6443E-01 -2.9242E-01 3.4007E-01 -2.5731E-01
S8 -1.7706E-02 -1.1403E-01 5.2674E-01 -1.5115E+00 2.9124E+00 -3.9255E+00 3.7904E+00
S9 -6.9482E-05 -8.8993E-02 1.4957E-01 -1.0809E-01 -4.6155E-02 1.8882E-01 -2.1376E-01
S10 2.0102E-02 -2.5958E-01 4.1737E-01 -4.2307E-01 3.0893E-01 -1.7065E-01 7.2758E-02
S11 1.9418E-01 -2.7870E-01 2.7179E-01 -2.1822E-01 1.4096E-01 -7.0494E-02 2.6365E-02
S12 7.3675E-02 1.5981E-02 -1.2483E-01 1.3886E-01 -8.7292E-02 3.6065E-02 -1.0368E-02
S13 -1.7357E-01 7.1985E-02 -2.9081E-02 9.8783E-03 -1.3429E-03 -3.9385E-04 2.3514E-04
S14 -2.8338E-01 2.0110E-01 -1.2840E-01 6.5845E-02 -2.5489E-02 7.2775E-03 -1.5224E-03
TABLE 6-1
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 1.3258E-01 -5.3008E-02 1.4517E-02 -2.5901E-03 2.7102E-04 -1.2609E-05 0.0000E+00
S3 1.8091E+00 -1.0442E+00 4.3040E-01 -1.2380E-01 2.3644E-02 -2.6991E-03 1.3959E-04
S4 -1.2095E+00 5.7105E-01 -1.7361E-01 3.0649E-02 -2.3851E-03 0.0000E+00 0.0000E+00
S5 2.0838E-01 -1.5276E-01 8.7037E-02 -3.2166E-02 6.7026E-03 -5.9652E-04 0.0000E+00
S6 1.1228E-01 -8.0948E-02 3.4607E-02 -9.0138E-03 1.3298E-03 -8.5677E-05 0.0000E+00
S7 1.2305E-01 -3.3971E-02 3.5804E-03 6.4048E-04 -2.2372E-04 1.8417E-05 0.0000E+00
S8 -2.6529E+00 1.3470E+00 -4.9081E-01 1.2496E-01 -2.1089E-02 2.1176E-03 -9.5686E-05
S9 1.4433E-01 -6.5093E-02 2.0146E-02 -4.2363E-03 5.7910E-04 -4.6424E-05 1.6556E-06
S10 -2.4068E-02 6.1379E-03 -1.1825E-03 1.6559E-04 -1.5791E-05 9.1056E-07 -2.3822E-08
S11 -7.2431E-03 1.4462E-03 -2.0682E-04 2.0604E-05 -1.3561E-06 5.2947E-08 -9.2786E-10
S12 2.1294E-03 -3.1488E-04 3.3258E-05 -2.4456E-06 1.1876E-07 -3.4171E-09 4.4025E-11
S13 -5.6587E-05 8.3002E-06 -8.0487E-07 5.2111E-08 -2.1762E-09 5.3176E-11 -5.7869E-13
S14 2.3292E-04 -2.5952E-05 2.0802E-06 -1.1680E-07 4.3608E-09 -9.7246E-11 9.8014E-13
TABLE 6-2
Fig. 11A and 12A show axial chromatic aberration curves of optical imaging lenses of example 3 having aperture values of 1.39 and 2.04, respectively, which represent convergent focus deviations of light rays of different wavelengths after passing through the lenses. Fig. 11B and 12B show astigmatism curves representing meridional field curvature and sagittal field curvature of the optical imaging lens of example 3 with aperture values of 1.39 and 2.04, respectively. Fig. 11C and 12C show distortion curves of the optical imaging lens of embodiment 3 having aperture values of 1.39 and 2.04, respectively, which represent distortion magnitude values corresponding to different image heights. As can be seen from fig. 11A to 12C, 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. 13 to 16C. Fig. 13 and 14 are schematic structural views showing optical imaging lenses having aperture values of 1.39 and 2.04 according to embodiment 4 of the present application, respectively.
As shown in fig. 13 and 14, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, an iris STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a planar image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative 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 convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In the present example, the total effective focal length F of the optical imaging lens is 4.87mm, the total length TTL of the optical imaging lens is 6.55mm, the half of the diagonal length ImgH of the effective pixel region on the imaging plane of the optical imaging lens is 4.18mm, the minimum value FNOmin of the F-number of the optical imaging lens is 1.39, and the maximum value FNOmax of the F-number of the optical imaging lens is 2.04. When the F number is the minimum value, the relative aperture of the optical imaging lens is the maximum; when the F number takes a maximum value, the relative aperture of the optical imaging lens is minimum.
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 all millimeters (mm). Tables 8-1 and 8-2 show the high-order term coefficients 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 BDA0002786976420000151
TABLE 7
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -4.5246E-03 1.4961E-02 -5.3078E-02 1.2282E-01 -2.0007E-01 2.2998E-01 -1.8721E-01
S3 -4.0246E-02 4.0403E-02 -1.3791E-01 4.9888E-01 -1.2063E+00 1.9905E+00 -2.3080E+00
S4 -4.6733E-02 -6.5614E-03 1.2979E-01 -4.6771E-01 1.0463E+00 -1.5697E+00 1.6148E+00
S5 -3.2037E-02 -9.8957E-03 -1.7784E-02 -3.8174E-02 2.9841E-01 -7.0667E-01 9.3002E-01
S6 -1.3448E-02 -4.6054E-02 1.2882E-01 -2.7138E-01 3.7152E-01 -3.0026E-01 1.0537E-01
S7 -1.8103E-02 1.0303E-02 -6.7531E-02 2.6111E-01 -5.5596E-01 7.5917E-01 -7.0017E-01
S8 -1.5251E-02 -1.3220E-01 6.2525E-01 -1.8546E+00 3.6835E+00 -5.0984E+00 5.0400E+00
S9 4.8951E-03 -8.2312E-02 1.3283E-01 -9.2711E-02 -4.9469E-02 1.7979E-01 -2.0039E-01
S10 1.1038E-02 -2.4084E-01 3.9684E-01 -4.0863E-01 3.0178E-01 -1.6786E-01 7.1793E-02
S11 9.3107E-02 -1.6436E-01 1.6499E-01 -1.3900E-01 9.6159E-02 -5.1473E-02 2.0347E-02
S12 5.5554E-02 2.8276E-02 -1.3398E-01 1.4585E-01 -9.1501E-02 3.7926E-02 -1.0962E-02
S13 -1.8526E-01 8.0407E-02 -3.4359E-02 1.2270E-02 -1.7604E-03 -5.2220E-04 3.2824E-04
S14 -2.8571E-01 1.9647E-01 -1.1947E-01 5.8243E-02 -2.1565E-02 5.9420E-03 -1.2096E-03
TABLE 8-1
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 1.0781E-01 -4.3498E-02 1.2001E-02 -2.1539E-03 2.2640E-04 -1.0569E-05 0.0000E+00
S3 1.9133E+00 -1.1406E+00 4.8576E-01 -1.4441E-01 2.8511E-02 -3.3631E-03 1.7956E-04
S4 -1.1412E+00 5.4403E-01 -1.6694E-01 2.9733E-02 -2.3331E-03 0.0000E+00 0.0000E+00
S5 -7.5832E-01 3.9035E-01 -1.2212E-01 2.0347E-02 -1.0345E-03 -8.9274E-05 0.0000E+00
S6 4.2417E-02 -7.0674E-02 3.8772E-02 -1.1529E-02 1.8526E-03 -1.2670E-04 0.0000E+00
S7 4.4497E-01 -1.9547E-01 5.8454E-02 -1.1404E-02 1.3156E-03 -6.8527E-05 0.0000E+00
S8 -3.6025E+00 1.8646E+00 -6.9156E-01 1.7901E-01 -3.0686E-02 3.1279E-03 -1.4341E-04
S9 1.3411E-01 -6.0021E-02 1.8437E-02 -3.8476E-03 5.2196E-04 -4.1524E-05 1.4695E-06
S10 -2.3762E-02 6.0554E-03 -1.1652E-03 1.6294E-04 -1.5517E-05 8.9358E-07 -2.3346E-08
S11 -5.8337E-03 1.2045E-03 -1.7697E-04 1.8029E-05 -1.2092E-06 4.7981E-08 -8.5266E-10
S12 2.2658E-03 -3.3727E-04 3.5863E-05 -2.6546E-06 1.2976E-07 -3.7579E-09 4.8725E-11
S13 -8.2483E-05 1.2619E-05 -1.2761E-06 8.6155E-08 -3.7520E-09 9.5602E-11 -1.0849E-12
S14 1.8129E-04 -1.9882E-05 1.5740E-06 -8.7516E-08 3.2420E-09 -7.1853E-11 7.2086E-13
TABLE 8-2
Fig. 15A and 16A show axial chromatic aberration curves of optical imaging lenses of example 4 having aperture values of 1.39 and 2.04, respectively, which represent convergent focus deviations of light rays of different wavelengths after passing through the lenses. Fig. 15B and 16B show astigmatism curves representing meridional field curvature and sagittal field curvature of the optical imaging lens of example 4 with aperture values of 1.39 and 2.04, respectively. Fig. 15C and 16C show distortion curves of the optical imaging lens of example 4 having aperture values of 1.39 and 2.04, respectively, which represent distortion magnitude values corresponding to different image heights. As can be seen from fig. 15A to 16C, the optical imaging lens according to embodiment 4 can achieve good imaging quality.
Examples5
An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 17 to 20C. Fig. 17 and 18 are schematic structural views showing optical imaging lenses having aperture values of 1.40 and 2.04 according to embodiment 5 of the present application, respectively.
As shown in fig. 17 and 18, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, an iris STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a planar image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative 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 convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In the present example, the total effective focal length F of the optical imaging lens is 4.87mm, the total length TTL of the optical imaging lens is 6.55mm, the half of the diagonal length ImgH of the effective pixel region on the imaging plane of the optical imaging lens is 4.18mm, the minimum value FNOmin of the F-number of the optical imaging lens is 1.40, and the maximum value FNOmax of the F-number of the optical imaging lens is 2.04. When the F number is the minimum value, the relative aperture of the optical imaging lens is the maximum; when the F number takes a maximum value, the relative aperture of the optical imaging lens is minimum.
Table 9 shows a basic parameter table of the optical imaging lens of embodiment 5, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Tables 10-1 and 10-2 show the high-order term coefficients 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 BDA0002786976420000171
TABLE 9
Figure BDA0002786976420000172
Figure BDA0002786976420000181
TABLE 10-1
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 1.1352E-01 -4.5784E-02 1.2648E-02 -2.2764E-03 2.4027E-04 -1.1274E-05 0.0000E+00
S3 3.1714E+00 -1.8956E+00 8.0785E-01 -2.3941E-01 4.6868E-02 -5.4472E-03 2.8458E-04
S4 -1.5548E+00 7.1251E-01 -2.0981E-01 3.5849E-02 -2.7000E-03 0.0000E+00 0.0000E+00
S5 4.6765E+00 -2.5491E+00 9.6315E-01 -2.4000E-01 3.5491E-02 -2.3605E-03 0.0000E+00
S6 8.2662E-01 -3.5844E-01 1.0706E-01 -2.0938E-02 2.4121E-03 -1.2417E-04 0.0000E+00
S7 5.7410E-01 -2.1937E-01 5.6279E-02 -9.1665E-03 8.4514E-04 -3.2933E-05 0.0000E+00
S8 -2.0536E+00 1.0613E+00 -3.9247E-01 1.0115E-01 -1.7243E-02 1.7459E-03 -7.9451E-05
S9 1.0638E-01 -4.6369E-02 1.3880E-02 -2.8232E-03 3.7326E-04 -2.8940E-05 9.9817E-07
S10 -2.2773E-02 5.7830E-03 -1.1081E-03 1.5431E-04 -1.4635E-05 8.3951E-07 -2.1849E-08
S11 -5.0849E-03 1.0347E-03 -1.4976E-04 1.5028E-05 -9.9281E-07 3.8800E-08 -6.7910E-10
S12 2.2166E-03 -3.2862E-04 3.4783E-05 -2.5613E-06 1.2444E-07 -3.5781E-09 4.5996E-11
S13 -7.8546E-05 1.1966E-05 -1.2038E-06 8.0841E-08 -3.5019E-09 8.8758E-11 -1.0019E-12
S14 1.9954E-04 -2.2118E-05 1.7737E-06 -1.0003E-07 3.7607E-09 -8.4573E-11 8.6037E-13
TABLE 10-2
Fig. 19A and 20A show axial chromatic aberration curves of optical imaging lenses of example 5 having aperture values of 1.40 and 2.04, respectively, which represent convergent focus deviations of light rays of different wavelengths after passing through the lenses. Fig. 19B and 20B show astigmatism curves representing meridional field curvature and sagittal field curvature of the optical imaging lens of example 5 having aperture values of 1.40 and 2.04, respectively. Fig. 19C and 20C show distortion curves of the optical imaging lens of example 5 having aperture values of 1.40 and 2.04, respectively, which represent distortion magnitude values corresponding to different image heights. As can be seen from fig. 19A to 20C, 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. 21 to 24C. Fig. 21 and 22 are schematic structural views showing optical imaging lenses having aperture values of 1.40 and 2.05 according to embodiment 6 of the present application, respectively.
As shown in fig. 21 and 22, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, an iris STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a planar image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative 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 convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In the present example, the total effective focal length F of the optical imaging lens is 4.87mm, the total length TTL of the optical imaging lens is 6.55mm, the half of the diagonal length ImgH of the effective pixel region on the imaging plane of the optical imaging lens is 4.18mm, the minimum value FNOmin of the F-number of the optical imaging lens is 1.40, and the maximum value FNOmax of the F-number of the optical imaging lens is 2.05. When the F number is the minimum value, the relative aperture of the optical imaging lens is the maximum; when the F number takes a maximum value, the relative aperture of the optical imaging lens is minimum.
Table 11 shows a basic parameter table of the optical imaging lens of embodiment 6, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Tables 12-1 and 12-2 show the 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 BDA0002786976420000191
TABLE 11
Figure BDA0002786976420000192
Figure BDA0002786976420000201
TABLE 12-1
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 1.1282E-01 -4.5360E-02 1.2502E-02 -2.2464E-03 2.3680E-04 -1.1102E-05 0.0000E+00
S3 3.0955E+00 -1.8409E+00 7.8083E-01 -2.3039E-01 4.4922E-02 -5.2019E-03 2.7088E-04
S4 -1.4729E+00 6.7266E-01 -1.9736E-01 3.3593E-02 -2.5200E-03 0.0000E+00 0.0000E+00
S5 4.8293E+00 -2.6241E+00 9.8750E-01 -2.4487E-01 3.6006E-02 -2.3794E-03 0.0000E+00
S6 7.4909E-01 -3.2112E-01 9.4681E-02 -1.8242E-02 2.0654E-03 -1.0421E-04 0.0000E+00
S7 5.7027E-01 -2.1900E-01 5.6600E-02 -9.3212E-03 8.7426E-04 -3.5035E-05 0.0000E+00
S8 -1.8410E+00 9.4590E-01 -3.4795E-01 8.9244E-02 -1.5143E-02 1.5265E-03 -6.9164E-05
S9 1.0440E-01 -4.5411E-02 1.3565E-02 -2.7534E-03 3.6328E-04 -2.8108E-05 9.6747E-07
S10 -2.2447E-02 5.6902E-03 -1.0885E-03 1.5134E-04 -1.4331E-05 8.2082E-07 -2.1330E-08
S11 -5.4455E-03 1.1166E-03 -1.6286E-04 1.6468E-05 -1.0962E-06 4.3169E-08 -7.6135E-10
S12 2.2467E-03 -3.3361E-04 3.5365E-05 -2.6079E-06 1.2689E-07 -3.6537E-09 4.7033E-11
S13 -7.5536E-05 1.1458E-05 -1.1477E-06 7.6740E-08 -3.3098E-09 8.3527E-11 -9.3877E-13
S14 1.9909E-04 -2.2071E-05 1.7692E-06 -9.9700E-08 3.7450E-09 -8.4159E-11 8.5579E-13
TABLE 12-2
Fig. 23A and 24A show axial chromatic aberration curves of optical imaging lenses of example 6 having aperture values of 1.40 and 2.05, respectively, which represent convergent focus deviations of light rays of different wavelengths after passing through the lenses. Fig. 23B and 24B show astigmatism curves representing meridional field curvature and sagittal field curvature of the optical imaging lens of example 6 with aperture values of 1.40 and 2.05, respectively. Fig. 23C and 24C show distortion curves of the optical imaging lens of example 6 having aperture values of 1.40 and 2.05, respectively, which represent distortion magnitude values corresponding to different image heights. As can be seen from fig. 23A to 24C, the optical imaging lens according to embodiment 6 can achieve good imaging quality.
In summary, examples 1 to 6 each satisfy the relationship shown in table 13.
Conditions/examples 1 2 3 4 5 6
f1/(EPDmax-EPDmin) 4.21 4.21 4.22 4.22 4.31 4.30
f3/(f2+f7) 1.59 1.54 1.48 1.55 1.40 1.40
f4/R7 1.45 1.46 1.34 1.36 1.52 1.55
(R11+R12)/f6 1.63 1.63 1.48 1.27 1.62 1.62
R3/R4 2.00 2.00 2.08 2.13 1.95 1.95
R5/R6 1.57 1.57 1.60 1.59 1.56 1.57
(CT1+T12)/(CT2+T23+CT3) 1.00 0.99 0.99 1.00 1.00 1.00
(DT31+DT32)/DT11 1.72 1.72 1.73 1.72 1.76 1.77
f34/f12 2.92 3.05 3.07 3.10 4.78 4.78
f56/(CT5+CT6) 7.06 6.97 6.90 7.05 6.63 6.61
(SAG71+SAG72)/(SAG51+SAG52) 1.20 1.20 1.43 1.55 1.67 1.70
Watch 13
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 appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (28)

1. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:
the first lens with positive focal power has a convex object-side surface and a plane image-side surface;
an iris diaphragm;
a second lens having a negative optical power;
a third lens having optical power;
the image side surface of the fourth lens is a convex surface;
a fifth lens having optical power;
a sixth lens having positive optical power; and
a seventh lens having a negative optical power;
the first lens is a glass lens, and the image side surface of the first lens is a spherical mirror surface.
2. The optical imaging lens of claim 1, wherein the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, and the effective focal length f7 of the seventh lens satisfy: 1.0 < f3/(f2+ f7) < 2.0.
3. The optical imaging lens of claim 1, wherein the effective focal length f4 of the fourth lens and the radius of curvature R7 of the object side of the fourth lens satisfy: 1.2 < f4/R7 < 1.7.
4. The optical imaging lens of claim 1, wherein the radius of curvature R12 of the image-side surface of the sixth lens, the radius of curvature R11 of the object-side surface of the sixth lens, and the effective focal length f6 of the sixth lens satisfy: 1.2 < (R11+ R12)/f6 < 1.7.
5. The optical imaging lens of claim 1, wherein the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens satisfy: 1.8 < R3/R4 < 2.3.
6. The optical imaging lens of claim 1, wherein the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R6 of the image-side surface of the third lens satisfy: 1.4 < R5/R6 < 2.0.
7. The optical imaging lens according to claim 1, wherein a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, a separation distance T12 of the first lens and the second lens on the optical axis, and a separation distance T23 of the second lens and the third lens on the optical axis satisfy: 0.8 < (CT1+ T12)/(CT2+ T23+ CT3) < 1.2.
8. The optical imaging lens according to claim 1, wherein an effective radius DT31 of an object side surface of the third lens, an effective radius DT32 of an image side surface of the third lens, and an effective radius DT11 of an object side surface of the first lens satisfy: 1.6 < (DT31+ DT32)/DT11 < 2.0.
9. 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: 2.9 < f34/f12 < 4.9.
10. The optical imaging lens according to claim 1, wherein a combined focal length f56 of the fifth lens and the sixth lens, a center thickness CT5 of the fifth lens on the optical axis, and a center thickness CT6 of the sixth lens on the optical axis satisfy: 6.5 < f56/(CT5+ CT6) < 7.5.
11. The optical imaging lens of claim 1, wherein a distance SAG52 on the optical axis from an intersection point of an image-side surface of the fifth lens and the optical axis to an effective radius vertex of an image-side surface of the fifth lens, a distance SAG51 on the optical axis from an intersection point of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of an object-side surface of the fifth lens, a distance SAG72 on the optical axis from an intersection point of an image-side surface of the seventh lens and the optical axis to an effective radius vertex of an image-side surface of the seventh lens, and a distance SAG71 on the optical axis from an intersection point of an object-side surface of the seventh lens and the optical axis to an effective radius vertex of an object-side surface of the seventh lens satisfy: 1.1 < (SAG71+ SAG72)/(SAG51+ SAG52) < 1.8.
12. The optical imaging lens of any one of claims 1-11 wherein the maximum entrance pupil diameter EPDmax of the optical imaging lens, the minimum entrance pupil diameter EPDmin of the optical imaging lens, and the effective focal length f1 of the first lens satisfy: f 1/(EPDMmax-EPDMmin) is more than 4.0 and less than 5.0.
13. The optical imaging lens of any one of claims 1 to 11, wherein the fifth lens element has a convex object-side surface and a concave image-side surface.
14. The optical imaging lens of any one of claims 1 to 11, wherein the sixth lens element has a convex object-side surface and a concave image-side surface.
15. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:
the first lens with positive focal power has a convex object-side surface and a plane image-side surface;
an iris diaphragm;
a second lens having a negative optical power;
a third lens having optical power;
the image side surface of the fourth lens is a convex surface;
a fifth lens having optical power;
a sixth lens having positive optical power; and
a seventh lens having a negative optical power;
the maximum entrance pupil diameter EPDMmax of the optical imaging lens, the minimum entrance pupil diameter EPDMin of the optical imaging lens and the effective focal length f1 of the first lens satisfy: f 1/(EPDMmax-EPDMmin) is more than 4.0 and less than 5.0.
16. The optical imaging lens of claim 15, wherein the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, and the effective focal length f7 of the seventh lens satisfy: 1.0 < f3/(f2+ f7) < 2.0.
17. The optical imaging lens of claim 15, wherein the effective focal length f4 of the fourth lens and the radius of curvature R7 of the object side of the fourth lens satisfy: 1.2 < f4/R7 < 1.7.
18. The optical imaging lens of claim 15, wherein the radius of curvature R12 of the image-side surface of the sixth lens, the radius of curvature R11 of the object-side surface of the sixth lens, and the effective focal length f6 of the sixth lens satisfy: 1.2 < (R11+ R12)/f6 < 1.7.
19. The optical imaging lens of claim 15, wherein the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens satisfy: 1.8 < R3/R4 < 2.3.
20. The optical imaging lens of claim 15, wherein the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R6 of the image-side surface of the third lens satisfy: 1.4 < R5/R6 < 2.0.
21. The optical imaging lens of claim 15, wherein a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, a separation distance T12 of the first lens and the second lens on the optical axis, and a separation distance T23 of the second lens and the third lens on the optical axis satisfy: 0.8 < (CT1+ T12)/(CT2+ T23+ CT3) < 1.2.
22. The optical imaging lens of claim 15, wherein the effective radius DT31 of the object-side surface of the third lens, the effective radius DT32 of the image-side surface of the third lens, and the effective radius DT11 of the object-side surface of the first lens satisfy: 1.6 < (DT31+ DT32)/DT11 < 2.0.
23. The optical imaging lens of claim 15, 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: 2.9 < f34/f12 < 4.9.
24. The optical imaging lens of claim 15, wherein a combined focal length f56 of the fifth lens and the sixth lens, a center thickness CT5 of the fifth lens on the optical axis, and a center thickness CT6 of the sixth lens on the optical axis satisfy: 6.5 < f56/(CT5+ CT6) < 7.5.
25. The optical imaging lens of claim 15, wherein a distance SAG52 on the optical axis from an intersection point of an image-side surface of the fifth lens and the optical axis to an effective radius vertex of an image-side surface of the fifth lens, a distance SAG51 on the optical axis from an intersection point of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of an object-side surface of the fifth lens, a distance SAG72 on the optical axis from an intersection point of an image-side surface of the seventh lens and the optical axis to an effective radius vertex of an image-side surface of the seventh lens, and a distance SAG71 on the optical axis from an intersection point of an object-side surface of the seventh lens and the optical axis to an effective radius vertex of an object-side surface of the seventh lens satisfy: 1.1 < (SAG71+ SAG72)/(SAG51+ SAG52) < 1.8.
26. The optical imaging lens according to any one of claims 15 to 25, wherein the first lens is a glass lens, and an image side surface of the first lens is a spherical mirror surface.
27. The optical imaging lens of any one of claims 15 to 25, wherein the fifth lens element has a convex object-side surface and a concave image-side surface.
28. The optical imaging lens of any one of claims 15 to 25, wherein the sixth lens element has a convex object-side surface and a concave image-side surface.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023066339A1 (en) * 2021-10-22 2023-04-27 华为技术有限公司 Optical lens, camera module and electronic apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023066339A1 (en) * 2021-10-22 2023-04-27 华为技术有限公司 Optical lens, camera module and electronic apparatus

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