CN114815157A - Optical imaging lens - Google Patents

Optical imaging lens Download PDF

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Publication number
CN114815157A
CN114815157A CN202210463118.2A CN202210463118A CN114815157A CN 114815157 A CN114815157 A CN 114815157A CN 202210463118 A CN202210463118 A CN 202210463118A CN 114815157 A CN114815157 A CN 114815157A
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China
Prior art keywords
lens
optical imaging
imaging lens
optical
image
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Granted
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CN202210463118.2A
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Chinese (zh)
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CN114815157B (en
Inventor
柯再霖
邢天祥
黄林
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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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

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 an optical power; a second lens having an optical power; a third lens having a positive optical power; a fourth lens having a positive optical power; a fifth lens element with negative refractive power having a concave object-side surface and a convex image-side surface; and a sixth lens having optical power. The optical imaging lens satisfies: ImgH > 5.0mm, wherein ImgH is half the length of the diagonal line of the effective pixel area on the imaging surface 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
In daily life, portable electronic products such as smart phones are not only communication equipment, but also facilities for daily entertainment of people. Among them, the shooting capability of portable electronic products such as smart phones is one of the important functions that people pay attention to. With the development of science and technology, the shooting specialty of portable electronic products such as smart phones is gradually improved. Therefore, how to design an optical imaging lens with a large image plane and mounted on a portable electronic product has become one of the problems to be solved by many lens designers.
Disclosure of Invention
An aspect of the present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: a first lens having an optical power; a second lens having an optical power; a third lens having a positive optical power; a fourth lens having a positive optical power; a fifth lens element with negative refractive power having a concave object-side surface and a convex image-side surface; and a sixth lens having a focal power. The optical imaging lens can satisfy the following conditions: ImgH > 5.0mm, wherein ImgH is half the length of the diagonal line of the effective pixel area on the imaging surface 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 aspherical mirror surface.
In one embodiment, the optical imaging lens may satisfy: 1.5 < f1/R1 < 2.0, wherein f1 is the effective focal length of the first lens and R1 is the radius of curvature of the object side of the first lens.
In one embodiment, the optical imaging lens may satisfy: -2.5 < f/f2 < -1.5, wherein f is the total effective focal length of the optical imaging lens, and f2 is the effective focal length of the second lens.
In one embodiment, the optical imaging lens may satisfy: -2.0 < f3/R6 < -1.5, wherein f3 is the effective focal length of the third lens and R6 is the radius of curvature of the image-side surface of the third lens.
In one embodiment, the optical imaging lens may satisfy: 1.0 < f4/R7 < 2.0, 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.
In one embodiment, the optical imaging lens may satisfy: 2.0 < f6/f5 < 4.5, wherein f5 is the effective focal length of the fifth lens and f6 is the effective focal length of the sixth lens.
In one embodiment, the optical imaging lens may satisfy: 1.0 < (R3+ R4)/(R3-R4) < 2.0, 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.
In one embodiment, the optical imaging lens may satisfy: -2.0 < (R9+ R10)/(R9-R10) < -1.0, wherein R9 is the radius of curvature of the object-side surface 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 may satisfy: 1.5 < ET5/ET4 < 3.0, wherein ET4 is the edge thickness of the fourth lens and ET5 is the edge thickness of the fifth lens.
In one embodiment, the optical imaging lens may satisfy: 3.0 < ∑ AT/T45 < 4.0, where Σ AT is the sum of the air intervals on the optical axis of any adjacent two lenses of the first lens to the sixth lens, and T45 is the air interval on the optical axis of the fourth lens and the fifth lens.
In one embodiment, the optical imaging lens may satisfy: 4.5 < ∑ CT/CT4 < 5.5, where Σ CT is the sum of the central thicknesses of the first lens to the sixth lens on the optical axis, and CT4 is the central thickness of the fourth lens on the optical axis.
In one embodiment, the optical imaging lens may satisfy: 1.0 < T56/CT6 < 2.0, wherein CT6 is the central thickness of the sixth lens on the optical axis, and T56 is the air space between the fifth lens and the sixth lens on the optical axis.
In one embodiment, the optical imaging lens may satisfy: 1.5 < (SAG51-SAG52)/(SAG51+ SAG52) < 3.5, wherein SAG51 is a distance on an 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, and SAG52 is a distance 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 the image side surface of the fifth lens.
In one embodiment, the optical imaging lens may satisfy: 1.0 < (SAG41-SAG42)/(SAG41+ SAG42) < 3.0, wherein SAG41 is a distance on an optical axis from an intersection point of an object side surface of the fourth lens and the optical axis to an effective radius vertex of the object side surface of the fourth lens, and SAG42 is a distance on the optical axis from an intersection point of an image side surface of the fourth lens and the optical axis to an effective radius vertex of the image side surface of the fourth lens.
In one embodiment, the optical imaging lens may satisfy: -3.0 < SAG11/SAG32 < -1.5, wherein SAG11 is the distance on the optical axis from the intersection point of the object side surface of the first lens and the optical axis to the effective radius vertex of the object side surface of the first lens, and SAG32 is the distance on the optical axis from the intersection point of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens.
In one embodiment, the optical imaging lens may satisfy: f/EPD is less than or equal to 2.5, wherein f is the total effective focal length of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens.
In one embodiment, the optical imaging lens may satisfy: 20 < FOV < 40, where FOV is the maximum field angle of the optical imaging lens.
In one embodiment, the optical imaging lens may satisfy: TTL/f is less than 1.1, wherein TTL is the distance between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis, and f is the total effective focal length of the optical imaging lens.
In one embodiment, the optical imaging lens further includes a folding device located between the object side and the first lens, for folding the light rays at the object side to the object side of the first lens.
The optical imaging lens is applicable to portable electronic products and has at least one beneficial effect of large image plane, good imaging quality 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 shows a schematic structural view of an optical imaging lens according to embodiment 1 of the present application;
fig. 2A to 2D 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 1;
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;
fig. 14A to 14D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of an optical imaging lens of embodiment 7; and
fig. 15 shows a schematic structural diagram of an optical imaging lens according to an exemplary embodiment of the present application.
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 accompanying drawings in conjunction with embodiments.
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 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 adjacent two lenses of the first lens to the sixth lens can have a spacing distance therebetween.
In an exemplary embodiment, the first lens may have a positive power or a negative power; the second lens may have a positive or negative optical power; the third lens may have a positive optical power; the fourth lens may have a positive optical power; the fifth lens element can have negative focal power, and the object-side surface can be a concave surface and the image-side surface can be a convex surface; and the sixth lens may have a positive power or a negative power.
In the exemplary embodiment, by setting the third lens and the fourth lens to have positive power, the field angle of the optical imaging lens is favorably increased, and the incident angle of light rays at the object side is favorably compressed, pupil aberration is reduced, and imaging quality is improved; the fifth lens is set to have negative focal power, the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a convex surface, so that the incident angle of off-axis light rays is favorably reduced, and the tolerance sensitivity of the lens is reduced.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: ImgH > 5.0mm, wherein ImgH is half the length of the diagonal line of the effective pixel area on the imaging surface of the optical imaging lens. The requirement that ImgH is larger than 5.0mm is met, the imaging effect of a large image plane of the optical imaging lens can be realized, and the lens has higher resolution.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.5 < f1/R1 < 2.0, wherein f1 is the effective focal length of the first lens and R1 is the radius of curvature of the object side of the first lens. The requirement that f1/R1 is more than 1.5 and less than 2.0 is met, the deflection angle of the marginal field of view in the first lens is favorably and reasonably controlled, and the sensitivity of the lens is favorably and effectively reduced.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -2.5 < f/f2 < -1.5, wherein f is the total effective focal length of the optical imaging lens, and f2 is the effective focal length of the second lens. Satisfy-2.5 < f/f2 < -1.5, be favorable to constraining the epaxial spherical aberration that the second lens produced in reasonable interval, be favorable to guaranteeing the imaging quality of epaxial field of vision.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -2.0 < f3/R6 < -1.5, wherein f3 is the effective focal length of the third lens and R6 is the radius of curvature of the image-side surface of the third lens. The optical lens meets the condition that f3/R6 is more than-2.0 and less than-1.5, is favorable for better correcting chromatic aberration, improves the imaging quality, and is favorable for reducing the problem of increase of tolerance sensitivity of the lens caused by over concentration of focal power and over bending of the surface of the third lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.0 < f4/R7 < 2.0, 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. The requirement that f4/R7 is more than 1.0 and less than 2.0 is met, the optical power distribution of each lens is favorably and reasonably controlled, the total length of the lens is shortened, the miniaturization of the lens is realized, and the tolerance sensitivity of the lens is favorably reduced.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2.0 < f6/f5 < 4.5, wherein f5 is the effective focal length of the fifth lens and f6 is the effective focal length of the sixth lens. Satisfying 2.0 < f6/f5 < 4.5, the deflection angle of light between the fifth lens and the sixth lens can be reduced, thereby reducing the sensitivity of the lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.0 < (R3+ R4)/(R3-R4) < 2.0, 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. Satisfy 1.0 < (R3+ R4)/(R3-R4) < 2.0, can correct chromatic aberration of the optical imaging lens, can make the aberration produced by the second lens offset with the aberration produced by other lenses at the same time, and then reduce the aberration of the whole lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -2.0 < (R9+ R10)/(R9-R10) < -1.0, wherein R9 is the radius of curvature of the object-side surface of the fifth lens and R10 is the radius of curvature of the image-side surface of the fifth lens. Satisfy-2.0 < (R9+ R10)/(R9-R10) < -1.0, can effectively control the aberration generated by the optical imaging lens at the fifth lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.5 < ET5/ET4 < 3.0, wherein ET4 is the edge thickness of the fourth lens and ET5 is the edge thickness of the fifth lens. The requirements that ET5/ET4 is more than 1.5 and less than 3.0 are met, the size distribution of the lenses of each lens is uniform, the size of the optical imaging lens is effectively reduced, the overlarge volume of the optical imaging lens is avoided, the assembly difficulty of the lenses is reduced, and the high space utilization rate is realized.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 3.0 < ∑ AT/T45 < 4.0, where Σ AT is the sum of the air intervals on the optical axis of any adjacent two lenses of the first lens to the sixth lens, and T45 is the air interval on the optical axis of the fourth lens and the fifth lens. Satisfies 3.0 < ∑ AT/T45 < 4.0, not only can effectively reduce the gap sensitivity of the lens, but also can correct the curvature of field of the lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 4.5 < ∑ CT/CT4 < 5.5, where Σ CT is the sum of the central thicknesses of the first lens to the sixth lens on the optical axis, and CT4 is the central thickness of the fourth lens on the optical axis. Satisfy 4.5 < ∑ CT/CT4 < 5.5, not only can effectively reduce the thickness sensitivity of the lens, but also can satisfy the requirement of miniaturization of the lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.0 < T56/CT6 < 2.0, wherein CT6 is the central thickness of the sixth lens on the optical axis, and T56 is the air space between the fifth lens and the sixth lens on the optical axis. The lens meets the requirement that T56/CT6 is more than 1.0 and less than 2.0, which is beneficial to ensuring the uniform size distribution of each lens, improving the assembly stability, reducing the integral aberration of the lens and shortening the total length of the lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.5 < (SAG51-SAG52)/(SAG51+ SAG52) < 3.5, wherein SAG51 is a distance on an 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, and SAG52 is a distance 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 the image side surface of the fifth lens. Satisfy 1.5 < (SAG51-SAG52)/(SAG51+ SAG52) < 3.5, be favorable to adjusting optical imaging lens's chief ray angle, be favorable to effectively improving optical imaging lens's relative luminance, promote image plane definition.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.0 < (SAG41-SAG42)/(SAG41+ SAG42) < 3.0, wherein SAG41 is a distance on an optical axis from an intersection point of an object side surface of the fourth lens and the optical axis to an effective radius vertex of the object side surface of the fourth lens, and SAG42 is a distance on the optical axis from an intersection point of an image side surface of the fourth lens and the optical axis to an effective radius vertex of the image side surface of the fourth lens. The requirement that 1.0 < (SAG41-SAG42)/(SAG41+ SAG42) < 3.0 is met, the fourth lens is prevented from being bent too much, the processing difficulty is reduced, and the optical imaging lens is enabled to have higher stability in assembly.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -3.0 < SAG11/SAG32 < -1.5, wherein SAG11 is the distance on the optical axis from the intersection point of the object side surface of the first lens and the optical axis to the effective radius vertex of the object side surface of the first lens, and SAG32 is the distance on the optical axis from the intersection point of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens. Satisfy-3.0 < SAG11/SAG32 < -1.5, be favorable to reducing the sensitivity of first lens and third lens, be favorable to the machine-shaping of lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: f/EPD is less than or equal to 2.5, wherein f is the total effective focal length of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens. The F/EPD is less than or equal to 2.5, so that the optical imaging lens has the characteristics of large image plane and small F number, the lens has large aperture and good imaging quality in dark environment.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 20 < FOV < 40, where FOV is the maximum field angle of the optical imaging lens. Illustratively, the FOV may further satisfy: 34 < FOV < 40. The condition that FOV is more than 20 degrees and less than 40 degrees is met, and the imaging range of the lens can be effectively controlled.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: TTL/f is less than 1.1, wherein TTL is the distance between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis, and f is the total effective focal length of the optical imaging lens. The TTL/f is less than 1.1, and the optical imaging lens has a long-focus characteristic.
In an exemplary embodiment, the total effective focal length f of the optical imaging lens may be in a range of 14.5mm to 15.5 mm; the effective focal length f1 of the first lens can be in the range of 8.5 mm-10.0 mm; the effective focal length f2 of the second lens can be in the range of-8.5 mm to-7.0 mm; the effective focal length f3 of the third lens can be in the range of 13.5 mm-16.0 mm; the effective focal length f4 of the fourth lens can be in the range of 11.0 mm-13.5 mm; the effective focal length f5 of the fifth lens can be in the range of-14.0 mm to-9.0 mm; and the effective focal length f6 of the sixth lens can be in the range of-45 mm to-25 mm.
In an exemplary embodiment, a distance TTL on the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens may be in a range of 15mm to 20 mm; the half ImgH of the diagonal length of an effective pixel area on an imaging surface of the optical imaging lens can be within the range of 5.0 mm-6.0 mm; and a half of the Semi-FOV of the maximum field angle of the optical imaging lens may be in a range of 17 ° to 22 °.
In an exemplary embodiment, as shown in fig. 15, the optical imaging lens according to the present application further includes a folding device L located between the object side and the first lens for folding the light rays at the object side to the object side surface of the first lens. The catadioptric device L may include a prism having a transmission and/or reflection function for light, and the total length of the optical imaging lens can be shortened and the lens can be miniaturized by disposing the catadioptric device L between the object side and the first lens.
In an exemplary embodiment, an optical imaging lens according to the present application further includes a stop 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 with the characteristics of miniaturization, long focus, large image plane, large aperture, high imaging quality and the like. The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, the above six lenses. By reasonably distributing the focal power and the surface shape of each lens, the central thickness of each lens, the on-axis distance between each lens and the like, incident light can be effectively converged, the optical total length of the imaging lens is reduced, the machinability of the imaging lens is improved, and the optical imaging lens is more beneficial to 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, thereby improving the imaging quality. 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, and the sixth lens is an aspheric mirror surface. Optionally, each of the first, second, third, fourth, fifth, and sixth lenses has an object-side surface and an image-side surface that 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: an aperture 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 forming surface S15.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex 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 positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a concave image-side surface S12. The filter E7 has an object side S13 and an image side S14. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface 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 millimeters (mm).
Figure BDA0003621061380000081
TABLE 1
In the present example, the total effective focal length f of the optical imaging lens is 15.43mm, 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) is 16.00mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens is 5.27mm, and the half Semi-FOV of the maximum angle of view of the optical imaging lens is 18.4.
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 both aspheric, and the profile x of each aspheric lens can be defined by, but is not limited to, the following aspheric formula:
Figure BDA0003621061380000082
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1 to S12 used in example 1 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 And A 20 。
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -7.0753E-03 -3.7969E-03 2.2237E-04 3.9397E-04 1.7269E-04 6.6902E-05 2.1235E-05 1.0415E-05 5.5167E-06
S2 1.1090E-01 -1.3132E-02 2.7557E-03 -4.1979E-04 -3.1383E-05 2.7182E-05 1.0263E-04 -6.5427E-07 -9.0539E-07
S3 -1.9959E-01 2.1712E-02 -2.6489E-03 -1.0698E-04 -1.4245E-04 -4.1377E-05 6.0514E-05 -7.0790E-06 -5.4337E-07
S4 -3.2151E-01 2.8733E-02 -7.3604E-04 9.5421E-05 -2.6575E-04 -8.0156E-05 1.9570E-05 -1.4557E-06 -6.8046E-07
S5 1.8974E-02 -5.5985E-03 4.0905E-03 -6.7427E-06 -3.2933E-04 -1.6601E-04 3.3756E-05 1.5079E-06 -5.2724E-06
S6 -2.3393E-02 -1.0882E-02 1.0083E-03 3.4494E-04 -1.6517E-04 -5.5229E-05 2.8324E-05 -5.1704E-06 1.2035E-07
S7 -4.5093E-02 8.6535E-03 8.4957E-04 5.2704E-04 -1.3122E-04 1.1613E-05 2.7866E-05 -7.7168E-06 9.3403E-07
S8 -1.4126E-01 1.3313E-02 -1.2811E-04 5.2301E-04 5.7951E-06 1.0478E-05 1.1708E-05 -2.2719E-06 1.6133E-06
S9 1.3371E-02 -1.5321E-02 7.9117E-04 7.6569E-04 -6.5961E-05 3.9770E-05 4.6520E-06 -2.5733E-06 9.9060E-07
S10 2.2215E-01 -1.7613E-02 -8.0935E-04 7.1245E-04 -1.2530E-04 7.9230E-06 -3.4681E-07 -5.0749E-06 1.1909E-06
S11 -3.7101E-01 7.9723E-03 -5.8021E-03 3.8982E-04 -1.8755E-04 -8.3902E-06 -1.0185E-05 -1.2925E-05 -3.1236E-06
S12 -6.2220E-01 1.9190E-02 -8.4937E-03 7.8485E-04 -2.9685E-04 1.0753E-05 -5.7138E-06 -1.2251E-05 2.8925E-06
TABLE 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 a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different image heights. 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 the imaging plane after light passes through the lens. As can be seen from fig. 2A to 2D, 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. 3 to 4D. 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. 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: an aperture 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 forming surface S15.
The first lens element E1 has positive 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 has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object passes through the respective surfaces S1 to S14 in order 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 15.40mm, the total length TTL of the optical imaging lens is 16.00mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens is 5.32mm, and the half Semi-FOV of the maximum field angle of the optical imaging lens is 18.6 °.
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 millimeters (mm). Table 4 shows 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 formula (1) given in example 1 above.
Figure BDA0003621061380000101
TABLE 3
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -5.3744E-03 -4.7332E-03 -1.5357E-04 2.2583E-04 8.0869E-05 2.2945E-05 -2.8962E-07 2.7706E-06 -1.1739E-06
S2 1.0995E-01 -1.1916E-02 2.7010E-03 -3.7035E-04 -1.0832E-04 3.1310E-05 8.8325E-05 -2.8837E-05 -6.1681E-06
S3 -2.0164E-01 2.2898E-02 -2.4626E-03 -1.4882E-05 -1.2607E-04 -2.5570E-05 6.6562E-05 -1.3385E-05 -1.3950E-06
S4 -3.2496E-01 2.8513E-02 -2.2595E-04 4.5009E-04 -3.6284E-06 4.0412E-05 6.2840E-05 7.7197E-06 3.8336E-06
S5 2.0573E-02 -6.0630E-03 4.1468E-03 8.8662E-05 -3.3566E-04 -1.4028E-04 5.1957E-05 -4.8394E-07 -1.2100E-06
S6 -9.7491E-02 -3.3017E-02 -4.3066E-03 -5.1140E-03 -2.6136E-03 -3.8895E-04 -1.4367E-04 -1.3211E-04 -6.2614E-06
S7 -4.5638E-02 8.8720E-03 8.6708E-04 5.1682E-04 -1.4125E-04 7.1998E-06 2.6310E-05 -8.2465E-06 7.9142E-07
S8 -1.4340E-01 1.3122E-02 -1.1056E-04 5.6277E-04 1.9977E-06 1.1459E-05 1.1399E-05 -4.2570E-06 1.3023E-06
S9 1.4045E-02 -1.5615E-02 5.9634E-04 8.6614E-04 -6.0009E-05 3.1729E-05 -3.8855E-07 -7.1061E-06 1.7371E-06
S10 2.2252E-01 -1.8081E-02 -8.7685E-04 7.9719E-04 -1.0148E-04 1.4156E-05 1.0487E-06 -5.1960E-06 8.9215E-07
S11 -3.7179E-01 8.6765E-03 -5.0400E-03 5.7710E-04 -1.1789E-04 3.7162E-05 4.5677E-06 -8.6068E-06 -9.4979E-07
S12 -6.2459E-01 2.1179E-02 -7.7896E-03 9.2575E-04 -2.6254E-04 3.3705E-05 -2.4897E-07 -1.1838E-05 2.2693E-06
TABLE 4
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents 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 image heights. Fig. 4D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the 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: an aperture 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 forming surface S15.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex 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 positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object passes through the respective surfaces S1 to S14 in order 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 15.38mm, the total length TTL of the optical imaging lens is 16.01mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens is 5.35mm, and the half Semi-FOV of the maximum field angle of the optical imaging lens is 18.6 °.
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). Table 6 shows high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Figure BDA0003621061380000111
TABLE 5
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -7.1731E-03 -3.1997E-03 6.4773E-04 5.1025E-04 1.5805E-04 5.7942E-05 1.4826E-05 9.5101E-06 -2.1924E-07
S2 1.1274E-01 -1.1620E-02 3.8976E-03 -2.2779E-04 1.8977E-04 9.2556E-05 8.8748E-05 -1.5929E-05 -1.3898E-05
S3 -2.0217E-01 2.2587E-02 -2.5007E-03 -8.0537E-05 -1.8872E-05 3.2103E-06 5.9644E-05 -5.6149E-06 -5.6296E-06
S4 -3.2752E-01 2.9512E-02 -4.3301E-04 7.2622E-04 1.3130E-04 7.4114E-05 6.3474E-05 9.7083E-06 2.3499E-06
S5 2.0664E-02 -6.0467E-03 4.5756E-03 2.4745E-04 -1.9520E-04 -9.2471E-05 7.1870E-05 6.5682E-07 7.7693E-07
S6 -2.2836E-02 -1.0766E-02 9.7511E-04 3.6058E-04 -1.6883E-04 -5.7740E-05 2.9200E-05 -5.0167E-06 1.5205E-07
S7 -4.5408E-02 8.6899E-03 8.7111E-04 5.0019E-04 -1.3708E-04 1.0067E-05 2.5518E-05 -8.2160E-06 8.1488E-07
S8 -1.4537E-01 1.3192E-02 -3.3801E-04 5.4209E-04 -1.6404E-05 6.2083E-06 1.3396E-05 -4.4004E-06 9.5541E-07
S9 1.2808E-02 -1.6421E-02 3.2958E-04 7.8283E-04 -8.3572E-05 2.6671E-05 1.8708E-07 -4.2266E-06 6.8556E-07
S10 3.9194E-01 -4.8282E-02 3.3327E-03 1.6001E-03 -1.0840E-03 -1.6359E-04 -5.7666E-05 1.6941E-05 1.0842E-05
S11 -3.7344E-01 9.6255E-03 -5.3198E-03 5.5599E-04 -9.2139E-05 3.8934E-05 3.2752E-06 -7.1367E-06 4.4616E-08
S12 -6.2878E-01 2.0052E-02 -8.1032E-03 8.8089E-04 -2.3454E-04 3.6635E-05 -7.0942E-07 -1.2433E-05 2.2449E-06
TABLE 6
Fig. 6A shows on-axis chromatic aberration curves of the optical imaging lens of embodiment 3, which represent 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 image heights. 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 the 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: an aperture 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 forming surface S15.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex 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 positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex 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. Filter E7 has an object side S13 and an image side S14. The light from the object passes through the respective surfaces S1 to S14 in order 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 15.22mm, the total length TTL of the optical imaging lens is 16.00mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens is 5.40mm, and the half Semi-FOV of the maximum field angle of the optical imaging lens is 18.9 °.
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). Table 8 shows 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 formula (1) given in example 1 above.
Figure BDA0003621061380000131
TABLE 7
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -1.1489E-02 -2.0658E-03 1.0491E-03 5.2253E-04 1.5322E-04 3.9849E-05 4.4965E-06 3.4305E-06 -1.2001E-06
S2 1.1119E-01 -6.8254E-03 6.9645E-03 3.5852E-04 7.4354E-04 -3.8068E-05 2.1442E-04 -5.6872E-05 2.4443E-05
S3 -2.0456E-01 2.2543E-02 -2.3600E-03 -8.0034E-05 2.4780E-04 -1.4848E-04 1.2882E-04 -4.7091E-05 7.7252E-06
S4 -3.3104E-01 2.9012E-02 -1.2630E-03 7.0569E-04 1.2514E-04 6.1212E-05 5.5614E-05 -2.8484E-07 -2.5438E-06
S5 2.3196E-02 -5.4348E-03 4.8222E-03 4.2815E-04 -1.0622E-04 -4.9204E-05 8.4745E-05 2.0297E-06 -3.1974E-06
S6 -2.2427E-02 -1.1013E-02 9.0496E-04 4.0582E-04 -1.6073E-04 -5.8325E-05 3.2855E-05 -4.6862E-06 1.1389E-07
S7 -4.4812E-02 8.7406E-03 6.3470E-04 4.7058E-04 -1.3964E-04 1.1249E-05 2.4419E-05 -7.3171E-06 6.4657E-07
S8 -1.4823E-01 1.3433E-02 -6.8095E-04 4.8180E-04 -1.7840E-05 -2.9675E-06 1.3546E-05 -3.2991E-06 6.1348E-07
S9 9.3778E-03 -1.7182E-02 -4.7743E-05 7.1107E-04 -9.5148E-05 1.8708E-05 5.6889E-06 -3.5066E-06 2.9904E-07
S10 4.0590E-01 -5.0065E-02 1.7404E-03 2.0550E-03 -6.4463E-04 3.8222E-06 -2.4192E-05 -4.2295E-06 2.2317E-06
S11 -3.5745E-01 7.6035E-03 -5.7700E-03 4.5564E-04 -1.2979E-04 2.7947E-05 6.7596E-06 -6.3017E-06 6.6105E-07
S12 -6.2812E-01 1.7719E-02 -8.2169E-03 7.9397E-04 -2.4560E-04 3.0720E-05 8.7418E-06 -1.0094E-05 1.3599E-06
TABLE 8
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which represents 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 image heights. Fig. 8D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 4, which represents the 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: an aperture 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 forming surface S15.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex 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 positive power, and has a concave object-side surface S5 and a convex 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 concave object-side surface S9 and a convex 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. Filter E7 has an object side S13 and an image side S14. The light from the object passes through the respective surfaces S1 to S14 in order 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 15.19mm, the total length TTL of the optical imaging lens is 16.00mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens is 5.40mm, and the half Semi-FOV of the maximum field angle of the optical imaging lens is 19.0 °.
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). Table 10 shows 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 formula (1) given in example 1 above.
Figure BDA0003621061380000141
TABLE 9
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -9.0600E-03 -9.1968E-04 1.3519E-03 5.8102E-04 1.6761E-04 4.2385E-05 3.9683E-06 2.5867E-06 -1.4903E-06
S2 1.0825E-01 -5.7569E-03 8.6462E-03 3.8263E-04 8.6243E-04 -1.4448E-04 2.3177E-04 -6.3872E-05 3.8510E-05
S3 -2.0924E-01 2.0088E-02 -1.7111E-03 -2.5267E-04 3.2243E-04 -2.1596E-04 1.2931E-04 -5.4505E-05 9.7284E-06
S4 -3.2794E-01 3.1136E-02 -3.9284E-04 1.0277E-03 2.6394E-04 1.1929E-04 7.6984E-05 3.4834E-06 -3.1590E-06
S5 2.7220E-02 -4.6243E-03 4.7854E-03 5.0378E-04 -7.2234E-05 -2.3252E-05 9.7848E-05 8.4147E-06 -1.9222E-06
S6 -2.3408E-02 -1.1336E-02 6.9713E-04 3.9010E-04 -1.6961E-04 -6.2723E-05 3.3105E-05 -4.0387E-06 -4.5632E-09
S7 -4.6053E-02 8.0869E-03 5.2040E-04 4.7742E-04 -1.3395E-04 1.5426E-05 2.4352E-05 -7.1382E-06 5.1318E-07
S8 -1.4799E-01 1.3145E-02 -1.0132E-03 4.7750E-04 -1.2268E-05 -3.4151E-06 1.1802E-05 -2.8488E-06 5.5678E-07
S9 1.1834E-02 -1.6963E-02 -1.2004E-04 7.7920E-04 -1.0554E-04 1.8876E-05 5.2344E-06 -3.1000E-06 2.9896E-07
S10 4.0025E-01 -5.2831E-02 1.8429E-03 1.9474E-03 -6.1502E-04 3.2575E-05 -9.3420E-06 -5.1139E-06 8.9057E-07
S11 -3.4681E-01 4.5659E-03 -5.8310E-03 3.4589E-04 -1.3248E-04 1.8290E-05 5.8786E-06 -6.4376E-06 7.2554E-07
S12 -6.2024E-01 1.6234E-02 -7.8620E-03 7.3946E-04 -2.2615E-04 2.4084E-05 9.3093E-06 -8.9888E-06 1.2416E-06
Watch 10
Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the deviation of the convergent focal points 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 a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 5, which represents a deviation of different image heights on the 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: an aperture 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 forming surface S15.
The first lens element E1 has positive 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 has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a concave object-side surface S5 and a convex 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 concave object-side surface S9 and a convex 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. Filter E7 has an object side S13 and an image side S14. The light from the object passes through the respective surfaces S1 to S14 in order 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 14.94mm, the total length TTL of the optical imaging lens is 16.00mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens is 5.46mm, and the half Semi-FOV of the maximum field angle of the optical imaging lens is 19.5 °.
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). Table 12 shows 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 formula (1) given in example 1 above.
Figure BDA0003621061380000161
TABLE 11
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -7.1638E-03 -4.2463E-04 1.5239E-03 6.4160E-04 1.5755E-04 2.3529E-05 1.8482E-06 3.9986E-07 -7.5012E-07
S2 1.0448E-01 7.6458E-03 6.1379E-03 8.8517E-04 -1.2667E-03 -1.4308E-04 -1.5550E-04 -1.8566E-05 2.7501E-05
S3 -2.0951E-01 2.7843E-02 -3.7139E-03 9.5083E-04 -5.8412E-04 6.4471E-05 -3.2409E-05 -3.2659E-05 1.1289E-05
S4 -3.3004E-01 3.2004E-02 -2.1209E-04 9.6773E-04 1.4962E-04 1.3549E-04 4.2757E-05 -1.8362E-05 -3.3001E-06
S5 3.4309E-02 -6.1085E-03 4.9677E-03 5.2183E-04 -1.1463E-04 7.1737E-06 1.0010E-04 2.7466E-07 -4.7224E-06
S6 -2.7348E-02 -1.1469E-02 5.9230E-04 4.1396E-04 -1.7845E-04 -6.1571E-05 3.3698E-05 -3.1844E-06 -3.4152E-07
S7 -4.7944E-02 7.9991E-03 5.1444E-04 4.9064E-04 -1.2687E-04 1.3374E-05 2.2766E-05 -7.2549E-06 5.3440E-07
S8 -1.5244E-01 1.3415E-02 -1.1282E-03 4.8505E-04 -5.6634E-06 -7.4584E-06 9.8331E-06 -2.1168E-06 4.0947E-07
S9 1.4361E-02 -1.6478E-02 5.7250E-05 8.6422E-04 -9.1564E-05 1.2409E-05 8.8133E-06 -3.1178E-06 1.7289E-07
S10 4.0445E-01 -5.4951E-02 9.4811E-04 1.8039E-03 -4.2341E-04 4.5493E-05 1.3307E-05 -8.9749E-06 -3.9117E-08
S11 -3.1072E-01 6.8812E-04 -5.6248E-03 6.7523E-06 -1.4281E-04 -4.1978E-06 1.8675E-06 -3.7797E-06 1.2998E-06
S12 -1.2521E+00 -2.1954E-02 -3.0662E-02 -1.5071E-03 -1.4313E-03 -4.7666E-05 -6.3090E-05 -3.3040E-06 3.8007E-06
TABLE 12
Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the deviation of the convergent focal points 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 a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values corresponding to different image heights. 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 surface 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 structural view showing 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: an aperture 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 forming surface S15.
The first lens element E1 has positive 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 has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex 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. Filter E7 has an object side S13 and an image side S14. 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 14.91mm, the total length TTL of the optical imaging lens is 16.00mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens is 5.51mm, and the half Semi-FOV of the maximum field angle of the optical imaging lens is 19.6 °.
Table 13 shows a basic parameter table of the optical imaging lens of embodiment 7, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 14 shows high-order term coefficients that can be used for each aspherical mirror surface in example 7, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Figure BDA0003621061380000171
Watch 13
Figure BDA0003621061380000172
Figure BDA0003621061380000181
TABLE 14
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 a distortion curve of the optical imaging lens of embodiment 7, which represents distortion magnitude values corresponding to different image heights. 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 surface 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.
Figure BDA0003621061380000182
Figure BDA0003621061380000191
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 appreciated by those skilled in the art that the scope of the invention herein disclosed is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above 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 (10)

1. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:
a first lens having an optical power;
a second lens having an optical power;
a third lens having a positive optical power;
a fourth lens having a positive optical power;
a fifth lens element with negative refractive power having a concave object-side surface and a convex image-side surface; and
a sixth lens having optical power;
the optical imaging lens satisfies the following conditions: ImgH > 5.0mm, wherein ImgH is half of the diagonal length of an effective pixel area on an imaging surface of the optical imaging lens.
2. The optical imaging lens according to claim 1, characterized in that the optical imaging lens satisfies: 1.5 < f1/R1 < 2.0, wherein f1 is the effective focal length of the first lens and R1 is the radius of curvature of the object side of the first lens.
3. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies: -2.5 < f/f2 < -1.5, wherein f is the total effective focal length of the optical imaging lens, and f2 is the effective focal length of the second lens.
4. The optical imaging lens according to claim 1, characterized in that the optical imaging lens satisfies: -2.0 < f3/R6 < -1.5, wherein f3 is the effective focal length of the third lens and R6 is the radius of curvature of the image-side surface of the third lens.
5. The optical imaging lens according to claim 1, characterized in that the optical imaging lens satisfies: 1.0 < f4/R7 < 2.0, 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.
6. The optical imaging lens according to claim 1, characterized in that the optical imaging lens satisfies: 2.0 < f6/f5 < 4.5, wherein f5 is the effective focal length of the fifth lens and f6 is the effective focal length of the sixth lens.
7. The optical imaging lens according to claim 1, characterized in that the optical imaging lens satisfies: 1.0 < (R3+ R4)/(R3-R4) < 2.0, 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.
8. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies: -2.0 < (R9+ R10)/(R9-R10) < -1.0, wherein R9 is the radius of curvature of the object-side surface of the fifth lens and R10 is the radius of curvature of the image-side surface of the fifth lens.
9. The optical imaging lens according to claim 1, characterized in that the optical imaging lens satisfies: 1.5 < ET5/ET4 < 3.0, wherein ET4 is the edge thickness of the fourth lens and ET5 is the edge thickness of the fifth lens.
10. The optical imaging lens according to claim 1, characterized in that the optical imaging lens satisfies: 3.0 < ∑ AT/T45 < 4.0, where Σ AT is a sum of air spaces on the optical axis of any adjacent two lenses of the first lens to the sixth lens, and T45 is an air space on the optical axis of the fourth lens and the fifth lens.
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Citations (4)

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Publication number Priority date Publication date Assignee Title
CN105319688A (en) * 2014-07-29 2016-02-10 先进光电科技股份有限公司 Optical imaging system
CN206757166U (en) * 2017-06-05 2017-12-15 浙江舜宇光学有限公司 Imaging lens
CN107765394A (en) * 2016-08-22 2018-03-06 大立光电股份有限公司 Optical camera system group, image capturing device and electronic device
CN112285900A (en) * 2020-12-29 2021-01-29 常州市瑞泰光电有限公司 Image pickup optical lens

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105319688A (en) * 2014-07-29 2016-02-10 先进光电科技股份有限公司 Optical imaging system
CN107765394A (en) * 2016-08-22 2018-03-06 大立光电股份有限公司 Optical camera system group, image capturing device and electronic device
CN206757166U (en) * 2017-06-05 2017-12-15 浙江舜宇光学有限公司 Imaging lens
CN112285900A (en) * 2020-12-29 2021-01-29 常州市瑞泰光电有限公司 Image pickup optical lens

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