CN117289430A - Optical imaging lens - Google Patents

Optical imaging lens Download PDF

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Publication number
CN117289430A
CN117289430A CN202311334504.2A CN202311334504A CN117289430A CN 117289430 A CN117289430 A CN 117289430A CN 202311334504 A CN202311334504 A CN 202311334504A CN 117289430 A CN117289430 A CN 117289430A
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China
Prior art keywords
lens
optical imaging
image
optical
imaging lens
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CN202311334504.2A
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Chinese (zh)
Inventor
丁玲
吕赛锋
李明
闻人建科
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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Priority to CN202311334504.2A priority Critical patent/CN117289430A/en
Publication of CN117289430A publication Critical patent/CN117289430A/en
Pending legal-status Critical Current

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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
    • 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
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces

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

Abstract

The application discloses optical imaging lens, this camera lens includes in order from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The first lens has negative focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has optical power; the third lens has positive focal power; the fourth lens has positive focal power; the fifth lens has optical power; the sixth lens has optical power; and the seventh lens has negative focal power, and both the object side surface and the image side surface of the seventh lens are concave surfaces. The maximum effective half caliber DT72 of the image side surface of the seventh lens and the maximum effective half caliber DT71 of the object side surface of the seventh lens satisfy the conditions of 1.5 < DT72/DT71 < 2.

Description

Optical imaging lens
Statement of divisional application
The present application is a divisional application of chinese invention patent application with the name of "optical imaging lens" and application number 201810872496.X submitted on the date 08 and 02 of 2018.
Technical Field
The present application relates to an optical imaging lens, and more particularly, to an optical imaging lens including seven lenses.
Background
In recent years, with the rapid updating of portable electronic products such as smart phones and tablet computers, the market demands for product-end imaging lenses are increasing. The imaging lens is required to have characteristics such as high resolution, large aperture, large image plane, etc., a wide angle of view, and excellent imaging quality. However, in the trend of light and thin portable electronic products, how to meet the above requirements of the market becomes a challenge in the field of lens design.
Disclosure of Invention
The present application provides an optical imaging lens applicable to portable electronic products that at least solves or partially solves at least one of the above-mentioned drawbacks of the prior art.
In one aspect, the present application provides an optical imaging lens sequentially including, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The first lens element may have negative refractive power, wherein an object-side surface thereof may be convex, and an image-side surface thereof may be concave; the second lens has optical power; the third lens may have positive optical power; the fourth lens may have positive optical power; the fifth lens has optical power; the sixth lens has optical power; and the seventh lens may have negative optical power, and both the object-side surface and the image-side surface thereof may be concave. The effective focal length f1 of the first lens and the total effective focal length f of the optical imaging lens can meet the condition that f1/f is less than-3.5.
In one embodiment, the total effective focal length f of the optical imaging lens, the effective focal length f2 of the second lens, and the effective focal length f5 of the fifth lens may satisfy |f/f2|+|f/f5| < 0.6.
In one embodiment, the effective focal length f4 of the fourth lens and the effective focal length f3 of the third lens may satisfy 0 < f4/f3 < 0.5.
In one embodiment, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R2 of the image-side surface of the first lens may satisfy 2 < R1/R2 < 3.
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 0.5 < R3/R4 < 1.5.
In one embodiment, the radius of curvature R7 of the object side surface of the fourth lens and the total effective focal length f of the optical imaging lens may satisfy 1 < R7/f < 1.8.
In one embodiment, the radius of curvature R14 of the image side of the seventh lens and the radius of curvature R13 of the object side of the seventh lens may satisfy-2.1 < R14/R13 < 0.
In one embodiment, the distance T12 between the first lens and the second lens on the optical axis and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens may satisfy 0.7 < T12/ImgH < 1.2.
In one embodiment, the center thickness CT6 of the sixth lens element on the optical axis and the distance TTL between the object side surface of the first lens element and the imaging surface of the optical imaging lens element on the optical axis may satisfy 0.7 < CT6/ttl×10 < 1.7.
In one embodiment, the center thickness CT7 of the seventh lens on the optical axis and the effective focal length f7 of the seventh lens satisfy-0.8 < CT7/f7 < 0.
In one embodiment, the maximum effective half-caliber DT11 of the object side surface of the first lens and the maximum effective half-caliber DT12 of the image side surface of the first lens may satisfy 1.8 < DT11/DT12 < 2.3.
In one embodiment, the maximum effective half-caliber DT72 of the image side of the seventh lens and the maximum effective half-caliber DT71 of the object side of the seventh lens may satisfy 1.5 < DT72/DT71 < 2.
In one embodiment, the maximum half field angle HFOV of the optical imaging lens may satisfy 72 < HFOV < 92.
In one embodiment, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy f/EPD < 2.0.
In another aspect, the present application provides an optical imaging lens comprising, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The first lens element may have negative refractive power, wherein an object-side surface thereof may be convex, and an image-side surface thereof may be concave; the second lens has optical power; the third lens may have positive optical power; the fourth lens may have positive optical power; the fifth lens has optical power; the sixth lens has optical power; and the seventh lens may have negative optical power, and both the object-side surface and the image-side surface thereof may be concave. The maximum effective half-caliber DT72 of the image side surface of the seventh lens and the maximum effective half-caliber DT71 of the object side surface of the seventh lens can satisfy 1.5 < DT72/DT71 < 2.
In yet another aspect, the present application provides an optical imaging lens including, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The first lens element may have negative refractive power, wherein an object-side surface thereof may be convex, and an image-side surface thereof may be concave; the second lens has optical power; the third lens may have positive optical power; the fourth lens may have positive optical power; the fifth lens has optical power; the sixth lens has optical power; and the seventh lens may have negative optical power, and both the object-side surface and the image-side surface thereof may be concave. The curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens can satisfy 2 < R1/R2 < 3.
In yet another aspect, the present application provides an optical imaging lens including, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The first lens element may have negative refractive power, wherein an object-side surface thereof may be convex, and an image-side surface thereof may be concave; the second lens has optical power; the third lens may have positive optical power; the fourth lens may have positive optical power; the fifth lens has optical power; the sixth lens has optical power; and the seventh lens may have negative optical power, and both the object-side surface and the image-side surface thereof may be concave. The curvature radius R3 of the object side surface of the second lens and the curvature radius R4 of the image side surface of the second lens can satisfy 0.5 < R3/R4 < 1.5.
In yet another aspect, the present application provides an optical imaging lens including, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The first lens element may have negative refractive power, wherein an object-side surface thereof may be convex, and an image-side surface thereof may be concave; the second lens has optical power; the third lens may have positive optical power; the fourth lens may have positive optical power; the fifth lens has optical power; the sixth lens has optical power; and the seventh lens may have negative optical power, and both the object-side surface and the image-side surface thereof may be concave. The maximum effective half-caliber DT11 of the object side surface of the first lens and the maximum effective half-caliber DT12 of the image side surface of the first lens can satisfy 1.8 < DT11/DT12 < 2.3.
Seven lenses are adopted, and the focal power, the surface shape, the center thickness of each lens, the axial spacing between each lens and the like of each lens are reasonably distributed, so that the optical imaging lens has at least one beneficial effect of wide angle, large aperture, miniaturization, high imaging quality and the like.
Drawings
Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:
Fig. 1 shows a schematic configuration diagram of an optical imaging lens according to embodiment 1 of the present application;
fig. 2A to 2D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 1;
fig. 3 shows a schematic structural view of an optical imaging lens according to embodiment 2 of the present application;
fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 2;
fig. 5 shows a schematic structural view of an optical imaging lens according to embodiment 3 of the present application;
fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 3;
fig. 7 shows a schematic structural diagram of 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 magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 4;
fig. 9 shows a schematic structural view of 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 magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 5;
Fig. 11 shows a schematic structural view of 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 magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 6;
fig. 13 shows a schematic structural view of 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 magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 7;
fig. 15 shows a schematic structural view of an optical imaging lens according to embodiment 8 of the present application;
fig. 16A to 16D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 8;
fig. 17 shows a schematic structural diagram of an optical imaging lens according to embodiment 9 of the present application;
fig. 18A to 18D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 9;
fig. 19 shows a schematic structural view of an optical imaging lens according to embodiment 10 of the present application;
fig. 20A to 20D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 10.
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 these detailed description are merely illustrative of exemplary embodiments of the application and are not intended to limit the scope of the 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 the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object side is referred to as the object side of the lens, and the surface of each lens closest to the image side is referred to as the image side of the lens.
It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," 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. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the present application, use of "may" means "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, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. 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.
The optical imaging lens according to the exemplary embodiment of the present application may include, for example, seven lenses having optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The seven lenses are sequentially arranged from the object side to the image side along the optical axis, and each adjacent lens can have an air space therebetween.
In an exemplary embodiment, the first lens may have negative optical power, an object-side surface thereof may be convex, and an image-side surface thereof may be concave; the second lens has positive optical power or negative optical power; the third lens may have positive optical power; the fourth lens may have positive optical power; the fifth lens has positive optical power or negative optical power; the sixth lens has positive optical power or negative optical power; and the seventh lens element may have negative optical power, wherein the object-side surface thereof may be concave and the image-side surface thereof may be concave. The optical power of the system is reasonably distributed, excessive concentration of the optical power is avoided, the sensitivity of a single lens can be reduced, and loose tolerance conditions are provided for actual machining and assembly processes.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition-3.5 < f1/f < -2, where f is the total effective focal length of the optical imaging lens and f1 is the effective focal length of the first lens. More specifically, f and f1 may further satisfy-3.27.ltoreq.f1/f.ltoreq.2.01. Satisfying the condition-3.5 < f1/f < -2, the angle of view can be increased, the incidence angle of light at the second lens can be slowed down, the caliber of the subsequent lens can be reduced, and the miniaturization of the lens can be maintained.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy a conditional expression of |f/f2|+|f/f5| < 0.6, where f is a total effective focal length of the optical imaging lens, f2 is an effective focal length of the second lens, and f5 is an effective focal length of the fifth lens. More specifically, f2 and f5 may further satisfy 0 < |f/f2|+|f/f5| < 0.6, e.g., 0.05+|f/f 2|+|f/f 5|+|0.54. The focal power of the second lens and the fifth lens is reasonably controlled, so that the high-level coma aberration and the vertical axis chromatic aberration generated by the second lens and the fifth lens can be effectively balanced, and the caliber of the third lens and the caliber of the fourth lens can be reduced.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < f4/f3 < 0.5, where f4 is an effective focal length of the fourth lens and f3 is an effective focal length of the third lens. More specifically, f4 and f3 may further satisfy 0.01.ltoreq.f4/f3.ltoreq.0.25. The optical power of the third lens and the fourth lens is reasonably distributed, so that the advanced spherical aberration and astigmatism generated by the third lens and the fourth lens can be effectively reduced, the deflection angle of light rays in the third lens and the fourth lens can be alleviated, and the sensitivity of the two lenses is reduced.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-0.8 < CT7/f7 < 0, where CT7 is the center thickness of the seventh lens element on the optical axis, and f7 is the effective focal length of the seventh lens element. More specifically, CT7 and f7 may further satisfy-0.67.ltoreq.CT 7/f 7.ltoreq.0.20. The focal power and the center thickness of the seventh lens are reasonably controlled, so that the distortion and the chromatic aberration which are not completely eliminated by the front lens can be effectively balanced while the size of the system is reduced, and the imaging quality of the lens is further improved.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 2 < R1/R2 < 3, where R1 is a radius of curvature of an object side surface of the first lens, and R2 is a radius of curvature of an image side surface of the first lens. More specifically, R1 and R2 may further satisfy 2.18.ltoreq.R1/R2.ltoreq.2.68. The curvature radiuses of the object side surface and the image side surface of the first lens are reasonably distributed, so that overlarge incidence angle and emergence angle of light rays on the first lens are avoided, the sensitivity of the lens is reduced, and meanwhile, the acceptable field angle range of the lens is enlarged.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.5 < R3/R4 < 1.5, where R3 is a radius of curvature of an object side surface of the second lens and R4 is a radius of curvature of an image side surface of the second lens. More specifically, R3 and R4 may further satisfy 0.57.ltoreq.R3/R4.ltoreq.1.41. The curvature radius of the object side surface and the image side surface of the second lens is reasonably controlled, so that the deflection angle of light rays in the second lens can be alleviated, and meanwhile, chromatic aberration and distortion generated by the first lens can be effectively balanced.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition of 1 < R7/f < 1.8, where R7 is a radius of curvature of an object side surface of the fourth lens, and f is a total effective focal length of the optical imaging lens. More specifically, R7 and f may further satisfy 1.14.ltoreq.R7/f.ltoreq.1.66. The curvature radius of the object side surface of the fourth lens and the total effective focal length of the optical imaging lens are reasonably controlled, so that the incident angle of light rays on the fourth lens can be slowed down, and the residual advanced spherical aberration and astigmatism of the front lens can be effectively balanced.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-2.1 < R14/R13 < 0, where R14 is a radius of curvature of an image side surface of the seventh lens element and R13 is a radius of curvature of an object side surface of the seventh lens element. More specifically, R14 and R13 may further satisfy-2.09.ltoreq.R14/R13.ltoreq.0.01. The curvature radius of the object side surface and the image side surface of the seventh lens is reasonably controlled, so that the incidence angle of light rays on the image surface can be reduced, the illumination of the marginal view field is enhanced, and meanwhile, the lens is matched with the Chief Ray Angle (CRA) of the chip.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 72 ° < HFOV < 92 °, where HFOV is the maximum half field angle of the optical imaging lens. More specifically, HFOV's further may satisfy 72.5 DEG.ltoreq.HFOV.ltoreq.91.0°. On the premise of ensuring miniaturization of the lens, by controlling the field angle, overlarge aberration and lower illuminance of the marginal field of view can be avoided, and the lens is favorable for ensuring excellent imaging quality in a wider field angle.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition that f/EPD < 2.0, where f is the total effective focal length of the optical imaging lens and EPD is the entrance pupil diameter of the optical imaging lens. More specifically, f and EPD may further satisfy 1.78.ltoreq.f/EPD.ltoreq.1.86. The f/EPD is controlled to be less than 2.0, so that the light quantity in unit time of the lens can be effectively increased, the illumination of the edge view field is improved, and the lens is ensured to have good shooting effect in a dark environment.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.7 < T12/ImgH < 1.2, where T12 is the distance between the first lens and the second lens on the optical axis, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens. More specifically, T12 and ImgH may further satisfy 0.97.ltoreq.T12/ImgH.ltoreq.1.14. The air interval of the first lens and the second lens on the optical axis is reasonably controlled, so that the assembly of the lens is facilitated, the size of the lens can be shortened, the incident angle of light entering the second lens can be slowed down, and the sensitivity of the lens is reduced.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition that 1.8 < DT11/DT12 < 2.3, where DT11 is the maximum effective half-caliber of the object side surface of the first lens and DT12 is the maximum effective half-caliber of the image side surface of the first lens. More specifically, DT11 and DT12 may further satisfy 1.92.ltoreq.DT 11/DT 12.ltoreq.2.21. The maximum effective half calibers of the object side surface and the image side surface of the first lens are controlled within a reasonable range, so that the size of the front end of the lens is reduced, the light flux of unit time of the edge view field is increased, and the illuminance of the edge view field is improved.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition that DT72/DT71 < 2 is less than 1.5, wherein DT72 is the maximum effective half-caliber of the image side surface of the seventh lens, and DT71 is the maximum effective half-caliber of the object side surface of the seventh lens. More specifically, DT72 and DT71 may further satisfy 1.63.ltoreq.DT 72/DT 71.ltoreq.1.84. The size of the rear end of the lens can be reduced by controlling the maximum effective half calibers of the object side surface and the image side surface of the seventh lens, and meanwhile, the illumination of the marginal view field is ensured. In addition, the lens is beneficial to blocking light rays with poor imaging quality of an edge view field and guaranteeing excellent imaging quality of the lens.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.7 < CT6/TTL 10 < 1.7, where CT6 is a center thickness of the sixth lens element on the optical axis, and TTL is a distance between an object side surface of the first lens element and an imaging surface of the optical imaging lens element on the optical axis. More specifically, CT6 and TTL can further satisfy CT6/TTL of 0.96.ltoreq.CT6/TTL 10.ltoreq.1.58. The center thickness of the sixth lens on the optical axis and the axial distance from the object side surface of the first lens to the imaging surface are reasonably controlled, so that the problems such as processing difficulty and the like caused by over-thinness of the lens can be avoided while miniaturization of the lens is ensured. In addition, the conditional expression 0.7 < CT6/TTL 10 < 1.7 is satisfied, and the deflection angle of light rays in the sixth lens is further facilitated to be alleviated, and the advanced coma and astigmatism which are not completely eliminated by the front-end lens are further balanced.
In an exemplary embodiment, the optical imaging lens may further include a diaphragm to improve imaging quality of the lens. Optionally, a stop may be provided between the third lens and the fourth 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 located on the imaging surface.
The optical imaging lens according to the above-described embodiments of the present application may employ a plurality of lenses, such as seven lenses described above. By reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial spacing between each lens and the like, the volume of the lens can be effectively reduced, the sensitivity of the lens can be reduced, and the processability of the lens can be improved, so that the optical imaging lens is more beneficial to production and processing and is applicable to portable electronic products. The optical imaging lens with the configuration can also have the beneficial effects of wide angle, large aperture, good imaging quality and the like.
In an embodiment of the present application, at least one of the mirrors of each lens is an aspherical mirror. The aspherical 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 a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality.
However, it will be appreciated by those skilled in the art that the number of lenses making up the optical imaging lens may be varied to achieve the various results and advantages described in the specification without departing from the technical solutions claimed herein. For example, although seven lenses are described as an example 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 the optical imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying 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 configuration diagram of an optical imaging lens according to embodiment 1 of the present application.
As shown in fig. 1, an optical imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, and the imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is convex. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is convex and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Optionally, a diaphragm (not shown) may be disposed between the third lens E3 and the fourth lens E4 to enhance the imaging quality of the lens.
Table 1 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the optical imaging lens of example 1, in which the units of the radii of curvature and the thicknesses are millimeters (mm).
TABLE 1
As can be seen from table 1, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspheric. In the present embodiment, the surface shape x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:
wherein x is the distance from the top of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis directionThe distance vector height of the point; c is the paraxial curvature of the aspheric surface, c=1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is the conic coefficient (given in table 1); ai is the correction coefficient of the aspherical i-th order. Table 2 below shows the higher order coefficients A that can be used for each of the aspherical mirrors S1-S14 in example 1 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 And A 20 。
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 1.5210E-03 -3.8000E-04 9.4300E-05 -2.2000E-05 3.2100E-06 -2.8000E-07 1.5100E-08 -4.3000E-10 4.9200E-12
S2 5.6050E-03 -4.1760E-02 1.1020E-01 -1.5605E-01 1.3941E-01 -7.8330E-02 2.7064E-02 -5.2600E-03 4.4400E-04
S3 -2.6300E-03 -3.1700E-02 9.7536E-02 -2.9315E-01 5.2235E-01 -5.8974E-01 4.0308E-01 -1.5251E-01 2.4569E-02
S4 1.5569E-02 -1.0074E-01 3.0540E-01 -9.4765E-01 1.7507E+00 -2.0505E+00 1.5051E+00 -6.2760E-01 1.1321E-01
S5 -6.3940E-02 2.7900E-04 -2.7197E-01 1.0139E+00 -2.1509E+00 3.0204E+00 -2.6341E+00 1.2637E+00 -2.5387E-01
S6 -8.4600E-03 -2.9500E-02 -1.6720E-02 5.3413E-01 -1.8709E+00 3.5992E+00 -3.9235E+00 2.2171E+00 -5.0357E-01
S7 9.6840E-03 -4.5800E-02 2.7208E-01 -9.6827E-01 2.1969E+00 -3.1502E+00 2.7733E+00 -1.3720E+00 2.9449E-01
S8 -9.0830E-02 7.5815E-02 -2.5627E-01 1.8383E+00 -7.3440E+00 1.7014E+01 -2.2726E+01 1.6272E+01 -4.8404E+00
S9 -3.9100E-01 5.0559E-01 -1.8943E+00 6.4922E+00 -1.4699E+01 2.2015E+01 -2.0728E+01 1.0760E+01 -2.2793E+00
S10 -1.2171E-01 -4.1811E-01 2.1518E+00 -5.5034E+00 9.7928E+00 -1.1733E+01 8.9162E+00 -3.8817E+00 7.3836E-01
S11 2.7709E-02 -9.9310E-02 4.2224E-01 -8.5033E-01 1.0106E+00 -7.5866E-01 3.5590E-01 -9.5700E-02 1.1308E-02
S12 -1.6518E-01 1.1709E-01 -2.8910E-02 -8.9500E-02 9.6302E-02 -3.1550E-02 -9.8300E-03 1.0568E-02 -2.2900E-03
S13 -3.8304E-01 1.5580E-01 -1.0646E-01 3.9396E-01 -8.4420E-01 9.5411E-01 -6.0319E-01 2.0408E-01 -2.8970E-02
S14 -6.2840E-02 1.2590E-02 5.7450E-03 -6.7800E-03 2.8160E-03 -6.5000E-04 8.7000E-05 -5.6000E-06 9.6200E-08
TABLE 2
Table 3 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 1, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 to the imaging surface S15 of the first lens E1, and the maximum half field angle HFOV.
f1(mm) -3.55 f6(mm) 2.14
f2(mm) 7.75 f7(mm) -1.87
f3(mm) 56.00 f(mm) 1.65
f4(mm) 2.94 TTL(mm) 7.70
f5(mm) -5.10 HFOV(°) 91.0
TABLE 3 Table 3
The optical imaging lens in embodiment 1 satisfies:
f1/f= -2.15, where f is the total effective focal length of the optical imaging lens and f1 is the effective focal length of the first lens E1;
f/f 2+|f/f 5|=0.54, where f is the total effective focal length of the optical imaging lens, f2 is the effective focal length of the second lens E2, and f5 is the effective focal length of the fifth lens E5;
f4/f3=0.05, where f4 is the effective focal length of the fourth lens E4 and f3 is the effective focal length of the third lens E3;
CT 7/f7= -0.57, wherein CT7 is the center thickness of the seventh lens E7 on the optical axis, and f7 is the effective focal length of the seventh lens E7;
r1/r2=2.65, wherein R1 is a radius of curvature of the object-side surface S1 of the first lens element E1, and R2 is a radius of curvature of the image-side surface S2 of the first lens element E1;
r3/r4=0.57, wherein R3 is a radius of curvature of the object-side surface S3 of the second lens element E2, and R4 is a radius of curvature of the image-side surface S4 of the second lens element E2;
r7/f=1.30, where R7 is a radius of curvature of the object side surface S7 of the fourth lens element E4, and f is a total effective focal length of the optical imaging lens;
r14/r13= -1.21, where R14 is the radius of curvature of the image side surface S14 of the seventh lens element E7, and R13 is the radius of curvature of the object side surface S13 of the seventh lens element E7;
f/EPD = 1.78, where f is the total effective focal length of the optical imaging lens, EPD is the entrance pupil diameter of the optical imaging lens;
T12/imgh=1.06, where T12 is the distance between the first lens E1 and the second lens E2 on the optical axis, and ImgH is half of the diagonal length of the effective pixel region on the imaging surface S15;
DT 11/dt12=2.03, wherein DT11 is the maximum effective half-caliber of the object side surface S1 of the first lens element E1, and DT12 is the maximum effective half-caliber of the image side surface S2 of the first lens element E1;
DT72/DT71 = 1.70, wherein DT72 is the maximum effective half-caliber of the image side surface S14 of the seventh lens element E7, and DT71 is the maximum effective half-caliber of the object side surface S13 of the seventh lens element E7;
CT 6/ttl=10.25, wherein CT6 is the center thickness of the sixth lens element E6 on the optical axis, and TTL is the distance between the object side surface S1 of the first lens element E1 and the imaging surface S15 on the optical axis.
Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which indicates the deviation of the converging focus after light rays of different wavelengths pass through the lens. Fig. 2B shows an astigmatism curve of the optical imaging lens of embodiment 1, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values in the case of different fields of view. Fig. 2D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 1, which represents deviations of light rays at different image heights on an imaging plane after passing through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens provided in 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 portions similar to embodiment 1 will be omitted for 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 according to the exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, and the imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is convex and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Optionally, a diaphragm (not shown) may be disposed between the third lens E3 and the fourth lens E4 to enhance the imaging quality of the lens.
Table 4 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the optical imaging lens of example 2, in which the units of the radii of curvature and the thicknesses are millimeters (mm).
TABLE 4 Table 4
As can be seen from table 4, in embodiment 2, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 5 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 2, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 2.7790E-03 -1.8000E-04 -2.5000E-05 7.9500E-06 -2.1000E-06 3.4500E-07 -3.0000E-08 1.3500E-09 -2.6000E-11
S2 -1.4670E-02 -1.6910E-02 7.2330E-02 -1.2664E-01 1.3806E-01 -9.3990E-02 3.9270E-02 -9.2200E-03 9.4200E-04
S3 2.1637E-02 -7.2840E-02 5.5389E-02 -1.5449E-01 2.2512E-01 -1.9194E-01 1.0309E-01 -2.9410E-02 2.8850E-03
S4 4.9291E-02 -1.6569E-01 3.0903E-01 -1.3293E+00 3.3180E+00 -5.0876E+00 4.9582E+00 -2.7674E+00 6.6996E-01
S5 -3.3300E-03 -9.0580E-02 5.4912E-02 -2.0358E-01 3.5136E-01 -3.1312E-01 5.4000E-01 -6.5968E-01 2.7339E-01
S6 3.1220E-03 2.5278E-02 -3.7902E-01 1.9758E+00 -6.0571E+00 1.0985E+01 -1.1394E+01 6.1882E+00 -1.3582E+00
S7 6.4420E-03 1.5714E-02 -2.1610E-02 6.4886E-01 -3.8550E+00 1.0689E+01 -1.5901E+01 1.2323E+01 -3.9268E+00
S8 -6.9810E-02 1.4968E-01 -4.8586E-01 2.4619E+00 -8.3050E+00 1.7556E+01 -2.2412E+01 1.5834E+01 -4.7684E+00
S9 -2.0842E-01 -2.7342E-01 1.6615E+00 -6.4976E+00 1.8568E+01 -3.5791E+01 4.3273E+01 -2.9600E+01 8.7083E+00
S10 -3.8700E-02 -4.6346E-01 1.8985E+00 -4.6377E+00 8.0793E+00 -9.7169E+00 7.5920E+00 -3.4471E+00 6.8752E-01
S11 -2.2740E-02 5.8464E-02 3.0093E-02 -2.0547E-01 3.0025E-01 -2.4029E-01 1.1556E-01 -3.1790E-02 3.8850E-03
S12 -1.3740E-01 5.3255E-02 1.0461E-01 -3.4350E-01 4.7373E-01 -3.9110E-01 1.8904E-01 -4.7240E-02 4.4730E-03
S13 -2.8947E-01 3.6742E-02 1.7088E-01 -3.2244E-01 3.1077E-01 -1.6724E-01 4.0954E-02 3.4300E-03 -2.6800E-03
S14 -5.0760E-02 -1.0210E-02 3.0616E-02 -2.5430E-02 1.2202E-02 -3.7700E-03 7.3000E-04 -8.0000E-05 3.7800E-06
TABLE 5
Table 6 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 2, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 to the imaging surface S15 of the first lens E1, and the maximum half field angle HFOV.
f1(mm) -3.40 f6(mm) 2.18
f2(mm) -66.12 f7(mm) -1.98
f3(mm) 13.84 f(mm) 1.60
f4(mm) 2.45 TTL(mm) 7.60
f5(mm) -5.76 HFOV(°) 89.8
TABLE 6
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which indicates the deviation of the converging focus after light rays of different wavelengths pass through the lens. Fig. 4B shows an astigmatism curve of the optical imaging lens of embodiment 2, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values in the case of different fields of view. Fig. 4D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 2, which represents deviations of light rays at different image heights on an imaging plane after passing through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens provided in 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 according to the exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, and the imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is convex and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Optionally, a diaphragm (not shown) may be disposed between the third lens E3 and the fourth lens E4 to enhance the imaging quality of the lens.
Table 7 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the optical imaging lens of example 3, in which the units of the radii of curvature and the thicknesses are millimeters (mm).
TABLE 7
As is clear from table 7, in embodiment 3, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 8 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 3, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
TABLE 8
Table 9 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 3, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 to the imaging surface S15 of the first lens E1, and the maximum half field angle HFOV.
f1(mm) -3.32 f6(mm) 2.14
f2(mm) 61.05 f7(mm) -1.97
f3(mm) 21.89 f(mm) 1.60
f4(mm) 2.45 TTL(mm) 7.60
f5(mm) -5.24 HFOV(°) 73.8
TABLE 9
Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve of the optical imaging lens of embodiment 3, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values in the case of different fields of view. Fig. 6D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 3, which represents deviations of light rays at different image heights on an imaging plane after passing through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens provided in 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 according to the exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, and the imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Optionally, a diaphragm (not shown) may be disposed between the third lens E3 and the fourth lens E4 to enhance the imaging quality of the lens.
Table 10 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the optical imaging lens of example 4, in which the units of the radii of curvature and the thicknesses are millimeters (mm).
Table 10
As can be seen from table 10, in example 4, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 11 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 4, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 1.9526E-03 -4.6000E-04 -3.0000E-06 1.2700E-05 -1.9000E-06 1.4800E-07 -8.8000E-09 4.3000E-10 -1.0000E-11
S2 -2.7546E-02 -5.5000E-03 6.1282E-02 -1.2133E-01 1.3874E-01 -9.6760E-02 4.0790E-02 -9.5700E-03 9.6700E-04
S3 2.3017E-02 -7.4540E-02 1.3126E-01 -4.6252E-01 8.9579E-01 -1.0381E+00 7.2798E-01 -2.8343E-01 4.7029E-02
S4 4.6887E-02 -1.2925E-01 3.1133E-02 -3.0601E-01 1.0336E+00 -1.5885E+00 1.4208E+00 -7.1636E-01 1.5712E-01
S5 8.8619E-03 -1.2739E-01 -7.3300E-02 4.0423E-01 -6.5290E-01 9.8500E-01 -1.1528E+00 6.9028E-01 -1.5030E-01
S6 2.6900E-02 -2.4700E-02 -3.8058E-01 2.2691E+00 -6.7837E+00 1.2402E+01 -1.3675E+01 8.0620E+00 -1.9160E+00
S7 1.0794E-02 -1.6400E-02 2.2530E-01 -1.2916E+00 4.3554E+00 -9.1934E+00 1.1910E+01 -8.6922E+00 2.7678E+00
S8 -9.6430E-02 1.0861E-01 3.0031E-02 2.2112E-02 -1.2554E+00 5.1920E+00 -9.6114E+00 8.6875E+00 -3.0794E+00
S9 2.9150E-03 -1.6322E+00 6.2486E+00 -1.8374E+01 4.2088E+01 -6.7975E+01 7.1113E+01 -4.3604E+01 1.2018E+01
S10 2.6093E-02 -1.0366E+00 3.2216E+00 -6.8263E+00 1.3662E+01 -2.1916E+01 2.2767E+01 -1.3142E+01 3.2003E+00
S11 1.4952E-01 -4.5168E-01 5.9041E-01 8.3714E-01 -3.8664E+00 5.5603E+00 -4.1080E+00 1.5744E+00 -2.4843E-01
S12 -1.2956E-01 9.5687E-02 -5.2560E-02 -3.8150E-02 1.7872E-02 8.5145E-02 -1.2581E-01 6.8959E-02 -1.3500E-02
S13 -3.2198E-01 1.8804E-01 -4.2323E-01 1.2056E+00 -2.3631E+00 2.8923E+00 -2.0996E+00 8.3162E-01 -1.3799E-01
S14 -7.0883E-02 2.5429E-02 -4.2900E-03 -2.7100E-03 2.0690E-03 -6.9000E-04 1.3100E-04 -1.4000E-05 6.5500E-07
TABLE 11
Table 12 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 4, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 to the imaging surface S15 of the first lens E1, and the maximum half field angle HFOV.
f1(mm) -3.34 f6(mm) 2.52
f2(mm) 45.44 f7(mm) -1.74
f3(mm) 272.93 f(mm) 1.56
f4(mm) 2.35 TTL(mm) 7.46
f5(mm) 129.82 HFOV(°) 72.5
Table 12
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve of the optical imaging lens of embodiment 4, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values in the case of different fields of view. Fig. 8D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 4, which represents deviations of light rays at different image heights on an imaging plane after passing through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens provided in 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, an optical imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, and the imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Optionally, a diaphragm (not shown) may be disposed between the third lens E3 and the fourth lens E4 to enhance the imaging quality of the lens.
Table 13 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the optical imaging lens of example 5, in which the units of the radii of curvature and the thicknesses are millimeters (mm).
TABLE 13
As is clear from table 13, in example 5, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 14 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 5, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 1.8036E-03 -5.7300E-04 3.4000E-05 1.1200E-05 -2.6000E-06 2.6700E-07 -1.5000E-08 4.7500E-10 -6.4000E-12
S2 -2.4582E-02 -2.2918E-02 1.0535E-01 -1.9410E-01 2.0883E-01 -1.3757E-01 5.4942E-02 -1.2260E-02 1.1830E-03
S3 6.0986E-02 -4.9779E-01 2.1328E+00 -5.9828E+00 1.0422E+01 -1.1454E+01 7.7344E+00 -2.9269E+00 4.7508E-01
S4 3.2160E-02 -6.4926E-02 -2.6978E-01 9.5226E-01 -2.5075E+00 4.2570E+00 -4.1017E+00 2.0651E+00 -4.2097E-01
S5 1.2551E-02 8.7477E-02 -1.7392E+00 8.2555E+00 -2.3577E+01 4.1551E+01 -4.3868E+01 2.5316E+01 -6.1371E+00
S6 -1.3508E-02 1.1294E-01 -4.0568E-01 8.9192E-01 8.8039E-01 -1.0832E+01 2.6863E+01 -2.9698E+01 1.2621E+01
S7 9.0710E-03 9.4223E-02 -4.5027E-01 1.3592E+00 -2.5098E+00 2.2432E+00 -2.2223E-01 -1.0831E+00 6.0138E-01
S8 -4.1282E-02 -2.5895E-01 3.0436E+00 -1.7147E+01 5.9371E+01 -1.2710E+02 1.6337E+02 -1.1495E+02 3.3855E+01
S9 -3.1274E-01 -4.9257E-01 3.1661E+00 -1.2403E+01 3.8472E+01 -7.9531E+01 9.8985E+01 -6.7369E+01 1.9420E+01
S10 1.4741E-01 -2.5341E+00 1.0875E+01 -2.8527E+01 5.1748E+01 -6.3729E+01 5.0356E+01 -2.2903E+01 4.5366E+00
S11 3.9288E-01 -2.2978E+00 8.1901E+00 -1.8772E+01 2.8422E+01 -2.8351E+01 1.7930E+01 -6.5165E+00 1.0364E+00
S12 -1.3044E-01 2.0703E-01 -6.4464E-01 1.4913E+00 -2.3176E+00 2.2611E+00 -1.3037E+00 4.0297E-01 -5.1340E-02
S13 -3.0974E-01 2.3228E-01 -8.0791E-01 2.2816E+00 -4.0940E+00 4.6792E+00 -3.2748E+00 1.2781E+00 -2.1229E-01
S14 -4.7662E-02 2.0901E-03 1.3822E-02 -1.2750E-02 6.1280E-03 -1.7700E-03 3.0600E-04 -2.9000E-05 1.1100E-06
TABLE 14
Table 15 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 5, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 to the imaging surface S15 of the first lens E1, and the maximum half field angle HFOV.
TABLE 15
Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve of the optical imaging lens of embodiment 5, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values in the case of different fields of view. Fig. 10D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the deviation of light rays at different image heights on the imaging plane after passing through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens provided in 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 diagram of an optical imaging lens according to embodiment 6 of the present application.
As shown in fig. 11, an optical imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, and the imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Optionally, a diaphragm (not shown) may be disposed between the third lens E3 and the fourth lens E4 to enhance the imaging quality of the lens.
Table 16 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the optical imaging lens of example 6, in which the units of the radii of curvature and the thicknesses are millimeters (mm).
Table 16
As is clear from table 16, in example 6, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 17 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 6, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 2.7850E-03 -8.8000E-04 6.6400E-05 2.0800E-05 -6.6000E-06 8.7300E-07 -6.3000E-08 2.4300E-09 -4.0000E-11
S2 -1.9280E-02 -1.9370E-02 1.1551E-01 -2.4966E-01 2.9501E-01 -2.0452E-01 8.3329E-02 -1.8530E-02 1.7500E-03
S3 2.2800E-02 -7.5990E-02 1.0792E-01 -3.1177E-01 5.1276E-01 -5.3722E-01 3.6923E-01 -1.4748E-01 2.5302E-02
S4 5.1628E-02 -2.2943E-01 5.5504E-01 -1.9774E+00 4.3400E+00 -5.6424E+00 4.4403E+00 -1.9720E+00 3.7947E-01
S5 -2.6330E-02 -9.4580E-02 2.4488E-01 -5.9725E-01 2.6555E-01 2.0971E+00 -4.4759E+00 3.5044E+00 -9.8615E-01
S6 -2.3900E-03 -8.2820E-02 1.0275E+00 -5.1996E+00 1.5655E+01 -3.0243E+01 3.6946E+01 -2.6307E+01 8.3139E+00
S7 -1.0830E-02 3.4720E-02 -2.6017E-01 2.9131E+00 -1.5573E+01 4.4057E+01 -6.9414E+01 5.7506E+01 -1.9395E+01
S8 -1.9994E-01 3.2719E-01 -1.2785E+00 8.2214E+00 -3.2459E+01 7.7214E+01 -1.0528E+02 7.3150E+01 -1.8126E+01
S9 1.2528E-01 -2.3624E+00 4.3364E+00 1.0812E+01 -9.8590E+01 3.0958E+02 -5.2008E+02 4.5704E+02 -1.6376E+02
S10 1.8756E-01 -2.4988E+00 9.8351E+00 -2.4602E+01 4.2637E+01 -4.8038E+01 3.0216E+01 -6.6921E+00 -1.1049E+00
S11 3.4548E-01 -1.9687E+00 7.5957E+00 -1.7993E+01 2.6612E+01 -2.4738E+01 1.3930E+01 -4.2708E+00 5.2875E-01
S12 -2.0865E-01 3.9843E-01 -1.1518E+00 2.6859E+00 -4.2841E+00 4.2777E+00 -2.5070E+00 7.8331E-01 -1.0049E-01
S13 -3.4200E-01 2.4983E-01 -4.1933E-01 4.0597E-01 4.3858E-02 -6.8032E-01 8.3588E-01 -4.1505E-01 7.2618E-02
S14 -8.3900E-02 3.9773E-02 -1.8270E-02 4.7480E-03 2.6200E-04 -7.5000E-04 2.7400E-04 -4.6000E-05 3.0700E-06
TABLE 17
Table 18 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 6, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 to the imaging surface S15 of the first lens E1, and the maximum half field angle HFOV.
f1(mm) -2.73 f6(mm) 2.23
f2(mm) 24.58 f7(mm) -2.02
f3(mm) 71.93 f(mm) 1.34
f4(mm) 2.92 TTL(mm) 7.45
f5(mm) 12.33 HFOV(°) 78.0
TABLE 18
Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve of the optical imaging lens of embodiment 6, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 12C shows a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values in the case of different fields of view. Fig. 12D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the deviation of light rays at different image heights on the imaging plane after passing through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens provided in 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 shows a schematic structural diagram of an optical imaging lens according to embodiment 7 of the present application.
As shown in fig. 13, the optical imaging lens according to the exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, and the imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Optionally, a diaphragm (not shown) may be disposed between the third lens E3 and the fourth lens E4 to enhance the imaging quality of the lens.
Table 19 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the optical imaging lens of example 7, in which the units of the radii of curvature and the thicknesses are millimeters (mm).
TABLE 19
As is clear from table 19, in example 7, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 20 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 7, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Table 20
Table 21 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 7, a total effective focal length f of the optical imaging lens, a distance TTL on the optical axis from the object side surface S1 to the imaging surface S15 of the first lens E1, and a maximum half field angle HFOV.
f1(mm) -3.15 f6(mm) -24.07
f2(mm) 37.55 f7(mm) -5.66
f3(mm) 139.17 f(mm) 1.53
f4(mm) 2.18 TTL(mm) 7.92
f5(mm) 8.37 HFOV(°) 82.5
Table 21
Fig. 14A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 7, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 14B shows an astigmatism curve of the optical imaging lens of embodiment 7, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 14C shows a distortion curve of the optical imaging lens of embodiment 7, which represents distortion magnitude values in the case of different fields of view. Fig. 14D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 7, which represents the deviation of light rays at different image heights on the imaging plane after passing through the lens. As can be seen from fig. 14A to 14D, the optical imaging lens provided in embodiment 7 can achieve good imaging quality.
Example 8
An optical imaging lens according to embodiment 8 of the present application is described below with reference to fig. 15 to 16D. Fig. 15 shows a schematic structural diagram of an optical imaging lens according to embodiment 8 of the present application.
As shown in fig. 15, the optical imaging lens according to the exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, and the imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave, and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Optionally, a diaphragm (not shown) may be disposed between the third lens E3 and the fourth lens E4 to enhance the imaging quality of the lens.
Table 22 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the optical imaging lens of example 8, in which the units of the radii of curvature and the thicknesses are millimeters (mm).
Table 22
As can be seen from table 22, in example 8, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 23 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 8, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 1.7083E-03 7.5100E-04 -9.0000E-04 3.1300E-04 -6.0000E-05 7.0600E-06 -5.1000E-07 2.0300E-08 -3.5000E-10
S2 2.9549E-02 -2.1529E-01 5.5348E-01 -8.2521E-01 7.6953E-01 -4.5266E-01 1.6309E-01 -3.2840E-02 2.8340E-03
S3 1.9497E-02 -5.7620E-02 -2.2020E-02 1.8263E-01 -5.2655E-01 7.4044E-01 -5.5889E-01 2.2345E-01 -3.7500E-02
S4 6.0513E-02 -3.2968E-01 1.1149E+00 -3.4592E+00 6.6269E+00 -7.7646E+00 5.5338E+00 -2.2087E+00 3.7776E-01
S5 -3.3314E-02 7.4802E-02 -1.0062E+00 4.3992E+00 -1.1920E+01 2.0774E+01 -2.2381E+01 1.3482E+01 -3.5109E+00
S6 3.6705E-02 -6.9220E-02 3.6284E-01 -1.8814E+00 6.3218E+00 -1.2956E+01 1.6047E+01 -1.1359E+01 3.4778E+00
S7 9.8757E-03 2.2867E-01 -2.0977E+00 9.7045E+00 -2.7409E+01 4.8319E+01 -5.1810E+01 3.0922E+01 -7.8805E+00
S8 -5.7626E-02 -4.6265E-01 4.7647E+00 -2.2972E+01 6.8116E+01 -1.2496E+02 1.3780E+02 -8.3284E+01 2.1078E+01
S9 -1.1453E-01 -4.1878E-01 -3.8684E+00 3.0202E+01 -9.9828E+01 1.9720E+02 -2.3661E+02 1.5775E+02 -4.4597E+01
S10 4.3778E-01 -1.7885E+00 -3.0019E+00 2.9196E+01 -7.6800E+01 1.1030E+02 -9.3328E+01 4.3667E+01 -8.7064E+00
S11 7.0628E-01 -5.3290E-01 -1.1851E+01 6.2579E+01 -1.6084E+02 2.4889E+02 -2.3823E+02 1.3136E+02 -3.2248E+01
S12 -9.4990E-01 1.4064E+00 -1.6935E+00 1.5283E+00 -8.7766E-01 1.2351E-01 1.9240E-01 -1.1668E-01 1.8812E-02
S13 -8.7664E-01 6.4856E-01 3.8527E-01 -2.1645E+00 3.7958E+00 -3.9225E+00 2.4704E+00 -8.6799E-01 1.2963E-01
S14 -7.0714E-03 -6.0620E-02 8.7286E-02 -6.7700E-02 3.2428E-02 -9.8900E-03 1.8700E-03 -2.0000E-04 9.3300E-06
Table 23
Table 24 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 8, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 to the imaging surface S15 of the first lens E1, and the maximum half field angle HFOV.
f1(mm) -3.00 f6(mm) -20.25
f2(mm) 33.68 f7(mm) -6.18
f3(mm) 143.95 f(mm) 1.49
f4(mm) 2.19 TTL(mm) 7.95
f5(mm) 8.95 HFOV(°) 77.5
Table 24
Fig. 16A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 8, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 16B shows an astigmatism curve of the optical imaging lens of embodiment 8, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 16C shows a distortion curve of the optical imaging lens of embodiment 8, which represents distortion magnitude values in the case of different fields of view. Fig. 16D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 8, which represents the deviation of light rays at different image heights on the imaging plane after passing through the lens. As can be seen from fig. 16A to 16D, the optical imaging lens provided in embodiment 8 can achieve good imaging quality.
Example 9
An optical imaging lens according to embodiment 9 of the present application is described below with reference to fig. 17 to 18D. Fig. 17 shows a schematic configuration diagram of an optical imaging lens according to embodiment 9 of the present application.
As shown in fig. 17, the optical imaging lens according to the exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, and the imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is convex and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Optionally, a diaphragm (not shown) may be disposed between the third lens E3 and the fourth lens E4 to enhance the imaging quality of the lens.
Table 25 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the optical imaging lens of example 9, in which the units of the radii of curvature and the thicknesses are millimeters (mm).
Table 25
As is clear from table 25, in example 9, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 26 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 9, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 3.7129E-03 -2.2400E-03 7.5800E-04 -1.7000E-04 2.7700E-05 -2.9000E-06 1.8200E-07 -6.5000E-09 9.7900E-11
S2 5.3639E-02 -2.5949E-01 6.2965E-01 -9.1136E-01 8.2728E-01 -4.7336E-01 1.6633E-01 -3.2850E-02 2.8040E-03
S3 2.5635E-02 -6.4250E-02 5.8672E-02 -1.7449E-01 2.5176E-01 -2.0821E-01 1.0631E-01 -3.0310E-02 3.5880E-03
S4 5.3707E-02 -2.5816E-01 7.1843E-01 -2.5197E+00 5.1991E+00 -6.2776E+00 4.5132E+00 -1.7997E+00 3.0673E-01
S5 -2.6949E-02 3.0459E-01 -3.7314E+00 1.8968E+01 -5.7347E+01 1.0708E+02 -1.2060E+02 7.4768E+01 -1.9524E+01
S6 6.7291E-02 -1.1418E+00 1.0621E+01 -5.8035E+01 2.0037E+02 -4.3903E+02 5.9064E+02 -4.4564E+02 1.4450E+02
S7 -1.7931E-02 4.7736E-01 -4.4685E+00 2.5331E+01 -8.8380E+01 1.9045E+02 -2.4666E+02 1.7548E+02 -5.2552E+01
S8 -6.3702E-02 -5.8986E-01 7.7603E+00 -4.6967E+01 1.7225E+02 -3.9042E+02 5.3299E+02 -4.0083E+02 1.2723E+02
S9 8.7236E-02 -2.2782E+00 7.4007E+00 -1.2531E+01 2.0552E-01 4.9094E+01 -1.0375E+02 9.3084E+01 -3.1737E+01
S10 1.0895E-01 -1.5934E+00 5.6762E+00 -1.4309E+01 2.9123E+01 -4.3494E+01 4.2330E+01 -2.3445E+01 5.5672E+00
S11 2.2747E-01 -8.9852E-01 1.9413E+00 -1.6285E+00 -1.4021E+00 4.6061E+00 -4.5159E+00 2.0869E+00 -3.8514E-01
S12 -5.2546E-02 -1.5721E-01 6.5082E-01 -1.4134E+00 2.0044E+00 -1.9627E+00 1.2054E+00 -4.0253E-01 5.5092E-02
S13 -3.1975E-01 3.4890E-01 -2.5106E+00 8.8878E+00 -1.7421E+01 2.0415E+01 -1.4378E+01 5.6564E+00 -9.5630E-01
S14 2.9333E-02 -2.1008E-01 2.5502E-01 -1.8088E-01 8.2984E-02 -2.4940E-02 4.7320E-03 -5.1000E-04 2.4400E-05
Table 26
Table 27 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 9, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 to the imaging surface S15 of the first lens E1, and the maximum half field angle HFOV.
Table 27
Fig. 18A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 9, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 18B shows an astigmatism curve of the optical imaging lens of embodiment 9, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 18C shows a distortion curve of the optical imaging lens of embodiment 9, which represents distortion magnitude values in the case of different fields of view. Fig. 18D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 9, which represents deviations of light rays at different image heights on an imaging plane after passing through the lens. As can be seen from fig. 18A to 18D, the optical imaging lens provided in embodiment 9 can achieve good imaging quality.
Example 10
An optical imaging lens according to embodiment 10 of the present application is described below with reference to fig. 19 to 20D. Fig. 19 shows a schematic structural diagram of an optical imaging lens according to embodiment 10 of the present application.
As shown in fig. 19, the optical imaging lens according to the exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, and the imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Optionally, a diaphragm (not shown) may be disposed between the third lens E3 and the fourth lens E4 to enhance the imaging quality of the lens.
Table 28 shows the surface types, radii of curvature, thicknesses, materials, and cone coefficients of the respective lenses of the optical imaging lens of example 10, wherein the radii of curvature and thicknesses are each in millimeters (mm).
Table 28
As can be seen from table 28, in embodiment 10, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 29 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 10, where each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Table 29
Table 30 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 10, a total effective focal length f of the optical imaging lens, a distance TTL on the optical axis from an object side surface S1 to an imaging surface S15 of the first lens E1, and a maximum half field angle HFOV.
f1(mm) -3.92 f6(mm) 1.88
f2(mm) -19.25 f7(mm) -1.36
f3(mm) 15.00 f(mm) 1.20
f4(mm) 2.18 TTL(mm) 6.68
f5(mm) 362.90 HFOV(°) 77.5
Table 30
Fig. 20A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 10, which indicates the deviation of the converging focus after light rays of different wavelengths pass through the lens. Fig. 20B shows an astigmatism curve of the optical imaging lens of embodiment 10, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 20C shows a distortion curve of the optical imaging lens of embodiment 10, which represents distortion magnitude values in the case of different fields of view. Fig. 20D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 10, which represents the deviation of light rays at different image heights on the imaging plane after passing through the lens. As can be seen from fig. 20A to 20D, the optical imaging lens provided in embodiment 10 can achieve good imaging quality.
In summary, examples 1 to 10 satisfy the relationships shown in table 31, respectively.
Table 31
The present application also provides an imaging device, the electron-sensitive element of which may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be a stand alone imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a cell phone. The imaging device is equipped with the optical imaging lens described above.
The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It will be appreciated by persons skilled in the art that the scope of the invention referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the invention. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.

Claims (10)

1. The optical imaging lens sequentially comprises, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens,
It is characterized in that the method comprises the steps of,
the first lens has negative focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface;
the second lens has optical power;
the third lens has positive optical power;
the fourth lens has positive focal power;
the fifth lens has optical power;
the sixth lens has optical power;
the seventh lens has negative focal power, and both the object side surface and the image side surface of the seventh lens are concave surfaces; and
the maximum effective half caliber DT72 of the image side surface of the seventh lens and the maximum effective half caliber DT71 of the object side surface of the seventh lens satisfy 1.5 < DT72/DT71 < 2.
2. The optical imaging lens of claim 1, wherein a radius of curvature R1 of an object side surface of the first lens and a radius of curvature R2 of an image side surface of the first lens satisfy 2 < R1/R2 < 3.
3. The optical imaging lens as claimed in claim 1, wherein a radius of curvature R3 of an object side surface of the second lens and a radius of curvature R4 of an image side surface of the second lens satisfy 0.5 < R3/R4 < 1.5.
4. The optical imaging lens of claim 3, wherein a total effective focal length f of the optical imaging lens, an effective focal length f2 of the second lens, and an effective focal length f5 of the fifth lens satisfy |f/f2|+|f/f5| < 0.6.
5. The optical imaging lens as claimed in claim 1, wherein a radius of curvature R7 of an object side surface of the fourth lens and a total effective focal length f of the optical imaging lens satisfy 1 < R7/f < 1.8.
6. The optical imaging lens of claim 5, wherein an effective focal length f4 of the fourth lens and an effective focal length f3 of the third lens satisfy 0 < f4/f3 < 0.5.
7. The optical imaging lens as claimed in claim 1, wherein a radius of curvature R14 of an image side surface of the seventh lens and a radius of curvature R13 of an object side surface of the seventh lens satisfy-2.1 < R14/R13 < 0.
8. The optical imaging lens as claimed in claim 7, wherein a center thickness CT7 of the seventh lens on the optical axis and an effective focal length f7 of the seventh lens satisfy-0.8 < CT7/f7 < 0.
9. The optical imaging lens as claimed in claim 1, wherein a maximum effective half-caliber DT11 of an object side surface of the first lens and a maximum effective half-caliber DT12 of an image side surface of the first lens satisfy 1.8 < DT11/DT12 < 2.3.
10. The optical imaging lens of claim 9, wherein an effective focal length f1 of the first lens and a total effective focal length f of the optical imaging lens satisfy-3.5 < f1/f < -2.
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