CN117706735A - Optical imaging lens - Google Patents

Optical imaging lens Download PDF

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Publication number
CN117706735A
CN117706735A CN202311805235.3A CN202311805235A CN117706735A CN 117706735 A CN117706735 A CN 117706735A CN 202311805235 A CN202311805235 A CN 202311805235A CN 117706735 A CN117706735 A CN 117706735A
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CN
China
Prior art keywords
lens
optical imaging
image
imaging lens
optical
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Pending
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CN202311805235.3A
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Chinese (zh)
Inventor
丁玲
闻人建科
贺凌波
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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Application filed by Zhejiang Sunny Optics Co Ltd filed Critical Zhejiang Sunny Optics Co Ltd
Priority to CN202311805235.3A priority Critical patent/CN117706735A/en
Publication of CN117706735A publication Critical patent/CN117706735A/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
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration

Abstract

The application discloses optical imaging lens, this optical imaging lens includes in proper order along the optical axis from the thing side to the image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens having optical power. The first lens has positive 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 positive focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a convex surface; the third lens has negative focal power, the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a concave surface; the sixth lens has negative focal power, and the image side surface of the sixth lens is a concave surface; the object side surface of the seventh lens is a convex surface; the number of lenses of the optical imaging lens having optical power is eight; the distance T34 between the effective pixel area and the diagonal line of the half ImgH, the distance T56 between the third lens and the fourth lens and the distance T56 between the fifth lens and the sixth lens on the optical axis on the imaging surface of the optical imaging lens satisfy the condition that 1.6 < ImgH/(T34+T56) < 2.1.

Description

Optical imaging lens
Filing and applying for separate cases
The present application is a divisional application of China patent application with the application number 201811230489.6, which is filed on the 10 th month 22 th 2018, and has the name of optical imaging lens.
Technical Field
The present application relates to an optical imaging lens, and in particular, to an optical imaging lens including eight lenses.
Background
In recent years, with rapid updating of portable electronic devices such as smart phones and tablet computers, there is an increasing demand for imaging lenses to be used in combination. In addition to the characteristics of high resolution, large image plane, large aperture, and the like, imaging lenses are required to have excellent imaging quality for long-range view. However, how to achieve long focal length, high resolution, and high imaging quality of an imaging lens while achieving miniaturization, so that the imaging lens can be suitable for portable electronic devices that are increasingly light and thin is a problem to be solved in the field of lens design at present.
Disclosure of Invention
The present application provides an optical imaging lens, e.g., a tele lens, applicable to portable electronic products that may at least address or partially address 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, a seventh lens, and an eighth lens having optical power. The first lens has positive 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 positive focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a convex surface; the third lens has negative focal power, the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a concave surface; the sixth lens has negative focal power, and the image side surface of the sixth lens is a concave surface; the object side surface of the seventh lens is a convex surface; the number of lenses of the optical imaging lens having optical power is eight; the distance T34 between the effective pixel area and the diagonal line of the half ImgH, the distance T56 between the third lens and the fourth lens and the distance T56 between the fifth lens and the sixth lens on the optical axis on the imaging surface of the optical imaging lens satisfy the condition that 1.6 < ImgH/(T34+T56) < 2.1.
In one embodiment, the distances TTL between the central thickness CT1 of the first lens on the optical axis, the central thickness CT4 of the fourth lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis and the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis satisfy 1.8 < (CT1+CT4+CT5) ×10/TTL < 2.3.
In one embodiment, the center thickness CT7 of the seventh lens on the optical axis, the separation distance T78 of the seventh lens and the eighth lens on the optical axis, and the center thickness CT8 of the eighth lens on the optical axis satisfy 0.6 < CT 7/(T78+CT8) < 1.6.
In one embodiment, the total effective focal length f of the optical imaging lens, the radius of curvature R1 of the object side surface of the first lens, the radius of curvature R2 of the image side surface of the first lens, the radius of curvature R3 of the object side surface of the second lens, and the radius of curvature R4 of the image side surface of the second lens may satisfy 1.5 < f/(r1+r2+r3+r4) < 2.0.
In one embodiment, the radius of curvature R5 of the object side surface of the third lens, the radius of curvature R6 of the image side surface of the third lens and the total effective focal length f of the optical imaging lens may satisfy 0.9 < |r5+r6|/f < 1.4.
In one embodiment, the radius of curvature R12 of the image side of the sixth lens element and the radius of curvature R13 of the object side of the seventh lens element may satisfy 0 < R12/R13 < 0.5.
In one embodiment, the distance TTL between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis and the total effective focal length f of the optical imaging lens satisfy 0.87.ltoreq.TTL/f < 1.0.
In one embodiment, the total effective focal length f of the optical imaging lens and the combined focal length f12 of the first lens and the second lens satisfy 2 < f/f12 < 2.5.
In one embodiment, the effective focal length f3 of the third lens and the effective focal length f6 of the sixth lens satisfy 0.7 < f3/f6 < 1.2.
In one embodiment, half of the maximum field angle semi-FOV of the optical imaging lens may satisfy 20 ° < semi-FOV < 25 °.
In one embodiment, the maximum effective half-caliber DT11 of the object side of the first lens and the maximum effective half-caliber DT31 of the object side of the third lens may satisfy 1.2 < DT11/DT31 < 1.7.
In one embodiment, the maximum effective half-caliber DT82 of the image side of the eighth lens and the maximum effective half-caliber DT32 of the image side of the third lens may satisfy 2.3 < DT82/DT32 < 3.3.
The eight 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 long focal length, 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;
fig. 21 shows a schematic structural view of an optical imaging lens according to embodiment 11 of the present application;
fig. 22A to 22D 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 11;
fig. 23 shows a schematic structural view of an optical imaging lens according to embodiment 12 of the present application;
fig. 24A to 24D 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 12.
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 is referred to as the object side of the lens, and the surface of each lens closest to the imaging plane 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, eight lenses having optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The eight 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 positive 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 negative optical power, and an image side surface thereof may be concave; the fourth lens has positive focal power or negative focal power; the fifth lens has positive optical power or negative optical power; the sixth lens may have negative optical power; the seventh lens has positive optical power or negative optical power; and the eighth lens has positive optical power or negative optical power. The optical power of the system is reasonably distributed, so that the spherical aberration and chromatic aberration of the system can be effectively corrected, the optical power can be prevented from being excessively concentrated in a single lens, the sensitivity of the lens is reduced, and loose tolerance conditions are provided for actual processing and assembly processes.
In an exemplary embodiment, the second lens may have positive optical power, and the object-side surface thereof may be convex, and the image-side surface thereof may be convex.
In an exemplary embodiment, the object side surface of the third lens may be concave.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy a condition that TTL/f < 1.0, where TTL is a distance between an object side surface of the first lens and an imaging surface of the optical imaging lens on an optical axis, and f is a total effective focal length of the optical imaging lens. More specifically, TTL and f can further satisfy 0.87.ltoreq.TTL/f.ltoreq.0.93. The lens satisfies TTL/f < 1.0, can have longer focal length while keeping miniaturization of the lens, so as to have good imaging effect in long-range shooting.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional 20 ° < semi-FOV < 25 °, wherein semi-FOV is half of the maximum field angle of the optical imaging lens. More specifically, the semi-FOV may further satisfy 21.1.ltoreq.semi-FOV.ltoreq.22.0. The visual angle of the system is reasonably controlled, and the edge visual field can be ensured to have higher resolution and higher relative brightness during long-range shooting.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.7 < f3/f6 < 1.2, where f3 is an effective focal length of the third lens and f6 is an effective focal length of the sixth lens. More specifically, f3 and f6 may further satisfy 0.8.ltoreq.f3/f6.ltoreq.1.0, for example, 0.81.ltoreq.f3/f6.ltoreq.0.94. The optical power of the third lens and the optical power of the sixth lens are reasonably distributed, astigmatism and vertical axis chromatic aberration generated by the two lenses can be effectively balanced, and deflection of light rays between the two lenses can be slowed down, so that effective calibers of the fourth lens and the fifth lens are reduced.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition that f/(r1+r2+r3+r4) < 2.0, where f is the total effective focal length of the optical imaging lens, R1 is the radius of curvature of the object side of the first lens, R2 is the radius of curvature of the image side of the first lens, R3 is the radius of curvature of the object side of the second lens, and R4 is the radius of curvature of the image side of the second lens. More specifically, f, R1, R2, R3 and R4 may further satisfy 1.53.ltoreq.f/(R1+R2+R3+R4). Ltoreq.1.81. By controlling the radius of curvature of the first lens and the second lens, the incidence angle and the emergence angle of light rays on the two lenses are reduced, the sensitivity of the lenses is reduced, and the high-level coma generated by the two lenses can be effectively balanced.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition that f/f12 is less than 2.5, where f is the total effective focal length of the optical imaging lens, and f12 is the combined focal length of the first lens and the second lens. More specifically, f and f12 may further satisfy 2.18.ltoreq.fF12.ltoreq.2.30. The ratio of the total focal length of the system to the combined focal length of the first lens and the second lens is reasonably controlled, so that excessive concentration of the focal power on the two lenses can be avoided, and meanwhile, larger spherical aberration and chromatic aberration of the two lenses can be avoided.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < R12/R13 < 0.5, where R12 is a radius of curvature of an image side surface of the sixth lens element and R13 is a radius of curvature of an object side surface of the seventh lens element. More specifically, R12 and R13 may further satisfy 0.15.ltoreq.R12/R13.ltoreq.0.42. By controlling the ratio of the radii of curvature of the image side surface of the sixth lens and the object side surface of the seventh lens within a reasonable range, the deflection of light rays from the image side surface of the sixth lens to the object side surface of the seventh lens is smoother, and meanwhile, the coma, astigmatism and field curvature generated by the two lenses can be effectively reduced. Alternatively, the image side surface of the sixth lens element may be concave, and the object side surface of the seventh lens element may be convex.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.9 < |r5+r6|/f < 1.4, where R5 is a radius of curvature of an object side surface of the third lens, R6 is a radius of curvature of an image side surface of the third lens, and f is a total effective focal length of the optical imaging lens. More specifically, R5, R6 and f may further satisfy 1.07.ltoreq.R5+R6|/f.ltoreq.1.14. The curvature radius of the object side surface and the image side surface of the third lens is reasonably distributed, so that the incidence angle and the emergence angle of light rays at the third lens can be reduced, the sensitivity of the lens is reduced, and in addition, the advanced spherical aberration and the astigmatism generated by the first two lenses (namely the first lens and the second lens) can be effectively balanced.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition that (CT 1+ct4+ct 5) ×10/TTL < 2.3, where CT1 is a central thickness of the first lens on the optical axis, CT4 is a central thickness of the fourth lens on the optical axis, CT5 is a central thickness of the fifth lens on the optical axis, and TTL is a distance between an object side surface of the first lens and an imaging surface of the optical imaging lens on the optical axis. More specifically, CT1, CT4, CT5 and TTL can further satisfy 1.94.ltoreq.Ct1+Ct4+Ct5). Times.10/TTL.ltoreq.2.00. Through the reasonable control of the central thickness of the first lens, the fourth lens and the fifth lens on the optical axis, the size of the front end of the lens can be reduced on the premise of ensuring manufacturability, and coma and axial chromatic aberration generated by the three lenses can be effectively balanced.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.6 < CT 7/(t78+ct8) < 1.6, where CT7 is the center thickness of the seventh lens on the optical axis, T78 is the distance between the seventh lens and the eighth lens on the optical axis, and CT8 is the center thickness of the eighth lens on the optical axis. More specifically, CT7, T78 and CT8 may further satisfy 0.61.ltoreq.CT7/(T78 + CT 8). Ltoreq.1.59. The method satisfies the condition that CT 7/(T78+CT8) < 1.6, can reduce the size of the rear end of the lens on the premise of satisfying manufacturability, and is beneficial to further balancing distortion and field curvature which are not completely eliminated by the front end lens.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition that 1.2 < DT11/DT31 < 1.7, where DT11 is the maximum effective half-caliber of the object side surface of the first lens and DT31 is the maximum effective half-caliber of the object side surface of the third lens. More specifically, DT11 and DT31 may further satisfy 1.50.ltoreq.DT 11/DT 31.ltoreq.1.58. The maximum effective half calibers of the first lens and the third lens object side face are reasonably distributed, the size of the front end of the lens can be reduced, the light flux of the edge view field can be 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 DT82/DT32 is less than 3.3, where DT82 is the maximum effective half-caliber of the image side of the eighth lens element and DT32 is the maximum effective half-caliber of the image side of the third lens element. More specifically, DT82 and DT32 may further satisfy 2.54.ltoreq.DT 82/DT 32.ltoreq.3.19. The size of the rear end of the lens can be reduced by controlling the maximum effective half calibers of the image side surfaces of the eighth lens and the third lens, and meanwhile, on the premise of ensuring the illumination of the edge view field, the light rays with poor imaging quality are eliminated, and the excellent imaging quality is ensured.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition of 1.6 < ImgH/(t34+t56) < 2.1, where ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, T34 is the distance between the third lens and the fourth lens on the optical axis, and T56 is the distance between the fifth lens and the sixth lens on the optical axis. More specifically, imgH, T34 and T56 may further satisfy 1.81.ltoreq.ImgH/(T34+T56). Ltoreq.1.94. The condition that ImgH/(T34+T56) < 2.1 is satisfied, the edge view field has higher resolution in long-range shooting, and the lens size can be further shortened. In addition, such an arrangement also eases the angle at which light enters the fourth and sixth lenses, reducing the sensitivity of both lenses.
In an exemplary embodiment, the optical imaging lens may further include a diaphragm to improve imaging quality of the lens. It will be appreciated by those skilled in the art that the diaphragm may be positioned at any location as desired.
Optionally, the 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, for example, eight lenses as 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 imaging lens is more beneficial to production and processing and can be suitable for portable electronic products such as mobile phones and the like. The imaging lens configured as described above can also have characteristics of long focal length, small size, high resolution, high 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, i.e., at least one of the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth 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. Optionally, the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are aspherical mirror surfaces.
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 eight lenses are described as an example in the embodiment, the optical imaging lens is not limited to include eight 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, the eighth lens E8, the filter E9, and the imaging surface S19.
The first lens element E1 has positive 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 convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, 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 concave 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 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 positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is convex. The eighth lens element E8 has positive refractive power, wherein an object-side surface S15 thereof is concave and an image-side surface S16 thereof is convex. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
The optical imaging lens in this embodiment may also be provided with a stop for restricting the light beam to improve the imaging quality.
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 eighth lens element E8 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 vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=1/R (i.e., paraxial curvature c is the 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-S16 in example 1 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 And A 20 。
TABLE 2
Table 3 shows the effective focal lengths f1 to f8 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 S19 of the first lens E1, half ImgH of the diagonal length of the effective pixel region on the imaging surface S19, and half semi-FOV of the maximum field angle.
f1(mm) 4.15 f7(mm) 11.01
f2(mm) 10.08 f8(mm) 28.42
f3(mm) -3.93 f(mm) 6.97
f4(mm) 49.79 TTL(mm) 6.35
f5(mm) -245.70 ImgH(mm) 2.78
f6(mm) -4.39 semi-FOV(°) 21.8
TABLE 3 Table 3
The optical imaging lens in embodiment 1 satisfies:
TTL/f=0.91, where TTL is a distance between the object side surface S1 of the first lens E1 and the imaging surface S19 on the optical axis, and f is a total effective focal length of the optical imaging lens;
f3/f6=0.90, where f3 is the effective focal length of the third lens E3 and f6 is the effective focal length of the sixth lens E6;
f/(r1+r2+r3+r4) =1.71, where f is the total effective focal length of the optical imaging lens, R1 is the radius of curvature of the object-side surface S1 of the first lens element E1, R2 is the radius of curvature of the image-side surface S2 of the first lens element E1, R3 is the radius of curvature of the object-side surface S3 of the second lens element E2, and R4 is the radius of curvature of the image-side surface S4 of the second lens element E2;
ff12=2.23, where f is the total effective focal length of the optical imaging lens, and f12 is the combined focal length of the first lens E1 and the second lens E2;
r12/r13=0.34, where R12 is a radius of curvature of the image side surface S12 of the sixth lens element E6, and R13 is a radius of curvature of the object side surface S13 of the seventh lens element E7;
r5+ R6/f = 1.12, where R5 is the radius of curvature of the object-side surface S5 of the third lens element E3, R6 is the radius of curvature of the image-side surface S6 of the third lens element E3, and f is the total effective focal length of the optical imaging lens assembly;
(ct1+ct4+ct5) ×10/ttl=1.97, where CT1 is the center thickness of the first lens element E1 on the optical axis, CT4 is the center thickness of the fourth lens element E4 on the optical axis, CT5 is the center thickness of the fifth lens element E5 on the optical axis, and TTL is the distance from the object side surface S1 of the first lens element E1 to the imaging surface S19 on the optical axis;
CT 7/(t78+ct 8) =1.50, where CT7 is the center thickness of the seventh lens E7 on the optical axis, T78 is the interval distance between the seventh lens E7 and the eighth lens E8 on the optical axis, and CT8 is the center thickness of the eighth lens E8 on the optical axis;
DT11/DT31 = 1.55, wherein DT11 is the maximum effective half-caliber of the object side surface S1 of the first lens E1, and DT31 is the maximum effective half-caliber of the object side surface S5 of the third lens E3;
DT82/DT32 = 3.01, wherein DT82 is the maximum effective half-caliber of the image side surface S16 of the eighth lens element E8, and DT32 is the maximum effective half-caliber of the image side surface S6 of the third lens element E3;
ImgH/(t34+t56) =1.86, where ImgH is half the diagonal length of the effective pixel region on the imaging surface S19, T34 is the distance between the third lens E3 and the fourth lens E4 on the optical axis, and T56 is the distance between the fifth lens E5 and the sixth lens E6 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 the 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 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, the eighth lens E8, the filter E9, and the imaging surface S19.
The first lens element E1 has positive 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 convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, 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 concave 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 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 positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The eighth lens element E8 has positive refractive power, wherein an object-side surface S15 thereof is convex, and an image-side surface S16 thereof is convex. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
The optical imaging lens in this embodiment may also be provided with a stop for restricting the light beam to improve the imaging quality.
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 eighth lens element E8 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.
TABLE 5
Table 6 shows the effective focal lengths f1 to f8 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 S19 of the first lens E1, half ImgH of the diagonal length of the effective pixel region on the imaging surface S19, and half semi-FOV of the maximum field angle.
f1(mm) 4.15 f7(mm) 66.38
f2(mm) 10.08 f8(mm) 9.17
f3(mm) -3.93 f(mm) 6.95
f4(mm) 50.43 TTL(mm) 6.37
f5(mm) -269.33 ImgH(mm) 2.79
f6(mm) -4.44 semi-FOV(°) 22.0
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 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 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, the eighth lens E8, the filter E9, and the imaging surface S19.
The first lens element E1 has positive 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 convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, 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 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 positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The eighth lens element E8 has positive refractive power, and its object-side surface S15 is convex and its image-side surface S16 is concave. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
The optical imaging lens in this embodiment may also be provided with a stop for restricting the light beam to improve the imaging quality.
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 can be seen from table 7, in example 3, the object side surface and the image side surface of any one of the first lens element E1 to the eighth lens element E8 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 f8 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 S19 of the first lens E1, half ImgH of the diagonal length of the effective pixel region on the imaging surface S19, and half semi-FOV of the maximum field angle.
f1(mm) 4.15 f7(mm) 315.32
f2(mm) 10.08 f8(mm) 8.74
f3(mm) -3.92 f(mm) 6.95
f4(mm) 23.53 TTL(mm) 6.31
f5(mm) -32.65 ImgH(mm) 2.73
f6(mm) -4.42 semi-FOV(°) 21.7
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 the 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 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, the eighth lens E8, the filter E9, and the imaging surface S19.
The first lens element E1 has positive 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 convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, 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 concave 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 concave and an image-side surface S10 thereof is convex. 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 an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The eighth lens element E8 has positive refractive power, and its object-side surface S15 is convex and its image-side surface S16 is concave. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
The optical imaging lens in this embodiment may also be provided with a stop for restricting the light beam to improve the imaging quality.
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 eighth lens element E8 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.
TABLE 11
Table 12 shows the effective focal lengths f1 to f8 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 S19 of the first lens E1, half ImgH of the diagonal length of the effective pixel region on the imaging surface S19, and half semi-FOV of the maximum field angle.
f1(mm) 4.15 f7(mm) -38.25
f2(mm) 10.08 f8(mm) 5.97
f3(mm) -3.93 f(mm) 6.95
f4(mm) 65.66 TTL(mm) 6.40
f5(mm) 520.05 ImgH(mm) 2.79
f6(mm) -4.18 semi-FOV(°) 21.9
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 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 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, the eighth lens E8, the filter E9, and the imaging surface S19.
The first lens element E1 has positive 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 convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, 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 concave 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 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 positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is convex. The eighth lens element E8 has negative refractive power, wherein an object-side surface S15 thereof is concave and an image-side surface S16 thereof is convex. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
The optical imaging lens in this embodiment may also be provided with a stop for restricting the light beam to improve the imaging quality.
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).
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TABLE 13
As can be seen 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 eighth lens element E8 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 -4.4774E-03 3.0680E-04 -7.4500E-03 1.4017E-02 -1.7730E-02 1.2743E-02 -5.3400E-03 1.1020E-03 -7.8000E-05
S2 2.2984E-02 -1.1764E-02 7.2277E-02 -1.2343E-01 1.3037E-01 -1.0325E-01 5.3198E-02 -1.4950E-02 1.7310E-03
S3 2.1876E-02 -1.4148E-02 1.1707E-01 -2.1224E-01 2.3055E-01 -1.7191E-01 8.1945E-02 -2.1520E-02 2.3250E-03
S4 1.3823E-02 1.1017E-02 2.2834E-02 -8.9820E-02 1.3515E-01 -1.1785E-01 6.2210E-02 -1.8580E-02 2.3930E-03
S5 -9.2964E-03 6.0066E-02 1.0820E-01 -6.5956E-01 1.5121E+00 -1.9764E+00 1.5373E+00 -6.6522E-01 1.2380E-01
S6 -1.2924E-02 9.0184E-02 4.2991E-02 -1.8547E-01 -2.2500E-01 1.9092E+00 -3.3864E+00 2.6055E+00 -7.4151E-01
S7 -1.3582E-01 1.1857E-02 -8.7980E-02 3.4191E-01 -5.7536E-01 6.3588E-01 -4.2886E-01 1.6801E-01 -3.0570E-02
S8 -1.1970E-01 4.3172E-02 -2.3871E-01 7.4775E-01 -1.1916E+00 1.1760E+00 -7.1505E-01 2.4816E-01 -3.7550E-02
S9 2.4051E-02 -1.4314E-01 2.9089E-01 -3.5692E-01 3.4760E-01 -2.7292E-01 1.4750E-01 -4.5600E-02 5.9510E-03
S10 4.2936E-02 -1.5346E-01 3.0584E-01 -3.7046E-01 3.1391E-01 -1.9178E-01 7.9224E-02 -1.9250E-02 2.0360E-03
S11 -9.8379E-02 -1.0458E-01 2.9246E-01 -4.4391E-01 4.4432E-01 -2.7913E-01 1.0435E-01 -2.1100E-02 1.7760E-03
S12 -2.4196E-01 2.6549E-01 -2.3776E-01 1.2869E-01 -3.9820E-02 6.1080E-03 -1.1000E-04 -9.4000E-05 9.0400E-06
S13 -2.4581E-01 4.5523E-01 -5.0171E-01 3.3737E-01 -1.4865E-01 4.3985E-02 -8.4600E-03 9.5000E-04 -4.7000E-05
S14 -1.7456E-01 3.1015E-01 -3.5529E-01 2.4128E-01 -1.0626E-01 3.1211E-02 -5.8800E-03 6.3500E-04 -3.0000E-05
S15 7.2310E-03 3.3755E-02 -5.4830E-02 2.0397E-02 6.7900E-04 -2.1700E-03 5.6100E-04 -6.0000E-05 2.4300E-06
S16 -1.3568E-01 1.4354E-01 -9.7710E-02 3.9253E-02 -9.4800E-03 1.3820E-03 -1.2000E-04 5.5500E-06 -1.1000E-07
TABLE 14
Table 15 shows the effective focal lengths f1 to f8 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 S19 of the first lens E1, half ImgH of the diagonal length of the effective pixel region on the imaging surface S19, and half semi-FOV of the maximum field angle.
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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 different image heights on the imaging plane after light passes 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, the eighth lens E8, the filter E9, and the imaging surface S19.
The first lens element E1 has positive 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 convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, 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 concave 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 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 an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The eighth lens element E8 has positive refractive power, and its object-side surface S15 is convex and its image-side surface S16 is concave. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
The optical imaging lens in this embodiment may also be provided with a stop for restricting the light beam to improve the imaging quality.
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 can be seen 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 eighth lens element E8 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 -4.4774E-03 3.0680E-04 -7.4500E-03 1.4016E-02 -1.7730E-02 1.2743E-02 -5.3400E-03 1.1020E-03 -7.8000E-05
S2 2.2984E-02 -1.1764E-02 7.2278E-02 -1.2343E-01 1.3037E-01 -1.0325E-01 5.3198E-02 -1.4950E-02 1.7310E-03
S3 2.1876E-02 -1.4147E-02 1.1707E-01 -2.1224E-01 2.3055E-01 -1.7191E-01 8.1944E-02 -2.1510E-02 2.3250E-03
S4 1.3823E-02 1.1017E-02 2.2836E-02 -8.9830E-02 1.3516E-01 -1.1786E-01 6.2217E-02 -1.8580E-02 2.3930E-03
S5 -8.7875E-03 5.1673E-02 1.6176E-01 -8.3491E-01 1.8351E+00 -2.3150E+00 1.7263E+00 -7.0897E-01 1.2395E-01
S6 -1.3513E-02 9.8387E-02 1.1010E-03 -8.5440E-02 -3.3831E-01 1.9586E+00 -3.3870E+00 2.6059E+00 -7.4163E-01
S7 -1.3582E-01 1.1821E-02 -8.7700E-02 3.4076E-01 -5.7273E-01 6.3231E-01 -4.2601E-01 1.6678E-01 -3.0340E-02
S8 -1.1970E-01 4.3139E-02 -2.3840E-01 7.4643E-01 -1.1886E+00 1.1719E+00 -7.1187E-01 2.4681E-01 -3.7310E-02
S9 2.4034E-02 -1.4295E-01 2.9005E-01 -3.5490E-01 3.4472E-01 -2.7042E-01 1.4620E-01 -4.5220E-02 5.9060E-03
S10 4.2950E-02 -1.5360E-01 3.0640E-01 -3.7167E-01 3.1547E-01 -1.9300E-01 7.9792E-02 -1.9400E-02 2.0520E-03
S11 -9.8383E-02 -1.0455E-01 2.9232E-01 -4.4360E-01 4.4393E-01 -2.7884E-01 1.0423E-01 -2.1070E-02 1.7730E-03
S12 -2.4194E-01 2.6546E-01 -2.3770E-01 1.2862E-01 -3.9780E-02 6.0910E-03 -1.0000E-04 -9.5000E-05 9.0800E-06
S13 -1.9338E-01 2.7019E-01 -2.5231E-01 1.4498E-01 -5.3680E-02 1.3112E-02 -2.0600E-03 1.8900E-04 -7.6000E-06
S14 -1.4900E-01 1.9596E-01 -2.4328E-01 1.8395E-01 -8.5190E-02 2.4389E-02 -4.1900E-03 3.9400E-04 -1.6000E-05
S15 -7.5872E-02 1.8271E-01 -1.9780E-01 1.1652E-01 -4.1710E-02 9.3210E-03 -1.2700E-03 9.6300E-05 -3.1000E-06
S16 -1.7682E-01 2.4926E-01 -1.9317E-01 9.0653E-02 -2.7030E-02 5.1370E-03 -6.0000E-04 3.9200E-05 -1.1000E-06
TABLE 17
Table 18 shows the effective focal lengths f1 to f8 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 S19 of the first lens E1, half ImgH of the diagonal length of the effective pixel region on the imaging surface S19, and half semi-FOV of the maximum field angle.
f1(mm) 4.15 f7(mm) -67.65
f2(mm) 10.08 f8(mm) 8.37
f3(mm) -3.93 f(mm) 7.04
f4(mm) 48.93 TTL(mm) 6.33
f5(mm) -247.51 ImgH(mm) 2.82
f6(mm) -4.27 semi-FOV(°) 21.9
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 different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens 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, the eighth lens E8, the filter E9, and the imaging surface S19.
The first lens element E1 has positive 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 convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, 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 concave 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 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 positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The eighth lens element E8 has negative refractive power, wherein an object-side surface S15 thereof is concave and an image-side surface S16 thereof is convex. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
The optical imaging lens in this embodiment may also be provided with a stop for restricting the light beam to improve the imaging quality.
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 can be seen 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 eighth lens element E8 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.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -4.4774E-03 3.0680E-04 -7.4500E-03 1.4017E-02 -1.7730E-02 1.2743E-02 -5.3400E-03 1.1020E-03 -7.8000E-05
S2 2.2984E-02 -1.1764E-02 7.2277E-02 -1.2343E-01 1.3037E-01 -1.0325E-01 5.3198E-02 -1.4950E-02 1.7310E-03
S3 2.1876E-02 -1.4148E-02 1.1707E-01 -2.1224E-01 2.3055E-01 -1.7191E-01 8.1945E-02 -2.1520E-02 2.3250E-03
S4 1.3823E-02 1.1017E-02 2.2834E-02 -8.9820E-02 1.3515E-01 -1.1785E-01 6.2210E-02 -1.8580E-02 2.3930E-03
S5 -8.7840E-03 5.1617E-02 1.6211E-01 -8.3594E-01 1.8367E+00 -2.3162E+00 1.7264E+00 -7.0860E-01 1.2380E-01
S6 -1.3516E-02 9.8410E-02 1.0190E-03 -8.5340E-02 -3.3822E-01 1.9582E+00 -3.3864E+00 2.6055E+00 -7.4151E-01
S7 -1.3582E-01 1.1857E-02 -8.7980E-02 3.4191E-01 -5.7536E-01 6.3588E-01 -4.2886E-01 1.6801E-01 -3.0570E-02
S8 -1.1970E-01 4.3172E-02 -2.3871E-01 7.4775E-01 -1.1916E+00 1.1760E+00 -7.1505E-01 2.4816E-01 -3.7550E-02
S9 2.4051E-02 -1.4314E-01 2.9089E-01 -3.5692E-01 3.4760E-01 -2.7292E-01 1.4750E-01 -4.5600E-02 5.9510E-03
S10 4.2936E-02 -1.5346E-01 3.0584E-01 -3.7046E-01 3.1391E-01 -1.9178E-01 7.9224E-02 -1.9250E-02 2.0360E-03
S11 -9.8379E-02 -1.0458E-01 2.9246E-01 -4.4391E-01 4.4432E-01 -2.7913E-01 1.0435E-01 -2.1100E-02 1.7760E-03
S12 -2.4196E-01 2.6549E-01 -2.3776E-01 1.2869E-01 -3.9820E-02 6.1080E-03 -1.1000E-04 -9.4000E-05 9.0400E-06
S13 -1.9232E-01 2.5910E-01 -2.1180E-01 9.9610E-02 -2.7480E-02 4.2720E-03 -3.0000E-04 -3.5000E-06 1.2100E-06
S14 1.2344E-02 -7.6490E-02 5.8213E-02 -2.3900E-02 5.5060E-03 -7.0000E-04 6.1000E-05 -6.7000E-06 4.9000E-07
S15 1.0511E-02 7.4797E-02 -1.3727E-01 9.4664E-02 -3.6200E-02 8.4150E-03 -1.1900E-03 9.3300E-05 -3.2000E-06
S16 -1.8130E-01 3.0192E-01 -2.7503E-01 1.4363E-01 -4.6360E-02 9.5060E-03 -1.2100E-03 8.7900E-05 -2.8000E-06
Table 20
Table 21 shows effective focal lengths f1 to f8 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 S19 of the first lens E1, a half ImgH of the diagonal length of the effective pixel region on the imaging surface S19, and a half semi-FOV of the maximum field angle.
f1(mm) 4.15 f7(mm) 11.71
f2(mm) 10.08 f8(mm) -336.10
f3(mm) -3.93 f(mm) 7.13
f4(mm) 48.55 TTL(mm) 6.30
f5(mm) -240.50 ImgH(mm) 2.81
f6(mm) -4.44 semi-FOV(°) 21.7
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 different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 14A to 14D, the optical imaging lens 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, the eighth lens E8, the filter E9, and the imaging surface S19.
The first lens element E1 has positive 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 convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, 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 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 positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The eighth lens element E8 has positive refractive power, wherein an object-side surface S15 thereof is concave and an image-side surface S16 thereof is convex. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
The optical imaging lens in this embodiment may also be provided with a stop for restricting the light beam to improve the imaging quality.
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 eighth lens element E8 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.
Table 23
Table 24 shows effective focal lengths f1 to f8 of the respective lenses in embodiment 8, 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 S19 of the first lens E1, a half ImgH of a diagonal length of an effective pixel region on the imaging surface S19, and a half semi-FOV of a maximum field angle.
f1(mm) 4.15 f7(mm) 29.35
f2(mm) 10.08 f8(mm) 43.72
f3(mm) -3.92 f(mm) 7.20
f4(mm) 22.14 TTL(mm) 6.28
f5(mm) -31.17 ImgH(mm) 2.78
f6(mm) -4.80 semi-FOV(°) 21.1
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 different image heights on the imaging plane after light passes 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, the eighth lens E8, the filter E9, and the imaging surface S19.
The first lens element E1 has positive 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 convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is concave. The fourth lens element E4 has negative 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 concave and an image-side surface S10 thereof is convex. 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 positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The eighth lens element E8 has positive refractive power, and its object-side surface S15 is convex and its image-side surface S16 is concave. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
The optical imaging lens in this embodiment may also be provided with a stop for restricting the light beam to improve the imaging quality.
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).
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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 eighth lens element E8 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 -4.6110E-03 4.5660E-04 -7.4900E-03 1.4061E-02 -1.7810E-02 1.2798E-02 -5.3600E-03 1.1060E-03 -7.9000E-05
S2 2.2989E-02 -1.1772E-02 7.2264E-02 -1.2338E-01 1.3031E-01 -1.0320E-01 5.3181E-02 -1.4950E-02 1.7300E-03
S3 2.1872E-02 -1.4162E-02 1.1719E-01 -2.1254E-01 2.3093E-01 -1.7220E-01 8.2076E-02 -2.1550E-02 2.3290E-03
S4 1.3826E-02 1.0991E-02 2.2930E-02 -9.0020E-02 1.3539E-01 -1.1804E-01 6.2307E-02 -1.8610E-02 2.3960E-03
S5 -9.1008E-03 5.7423E-02 1.2014E-01 -6.7112E-01 1.4433E+00 -1.7256E+00 1.1801E+00 -4.2416E-01 6.0087E-02
S6 -1.3611E-02 1.0852E-01 -1.5770E-01 9.8802E-01 -4.2714E+00 1.0389E+01 -1.3988E+01 9.8681E+00 -2.8380E+00
S7 -1.3602E-01 1.1572E-02 -7.6440E-02 2.8784E-01 -4.5358E-01 4.7876E-01 -3.0954E-01 1.1825E-01 -2.1780E-02
S8 -1.1898E-01 3.2421E-02 -1.6833E-01 5.0035E-01 -6.8547E-01 5.5311E-01 -2.6000E-01 6.6196E-02 -6.8600E-03
S9 2.3401E-02 -1.3451E-01 2.4903E-01 -2.5120E-01 1.9242E-01 -1.3558E-01 7.5227E-02 -2.4760E-02 3.4180E-03
S10 4.2740E-02 -1.5346E-01 3.0966E-01 -3.8329E-01 3.3302E-01 -2.0729E-01 8.6340E-02 -2.0990E-02 2.2110E-03
S11 -9.8673E-02 -1.0334E-01 2.9071E-01 -4.4208E-01 4.4296E-01 -2.7851E-01 1.0420E-01 -2.1090E-02 1.7760E-03
S12 -2.4356E-01 2.6930E-01 -2.4459E-01 1.3603E-01 -4.4720E-02 8.1530E-03 -6.2000E-04 -2.1000E-05 4.7100E-06
S13 -1.6843E-01 2.3922E-01 -1.9571E-01 9.2992E-02 -2.7750E-02 5.5690E-03 -7.9000E-04 7.4200E-05 -3.5000E-06
S14 -6.0811E-02 -2.7759E-02 6.5381E-02 -3.8660E-02 8.0620E-03 8.2700E-04 -6.7000E-04 1.1000E-04 -6.2000E-06
S15 -1.5152E-03 -3.1036E-02 4.7944E-02 -3.6600E-02 1.5049E-02 -3.5000E-03 4.6400E-04 -3.3000E-05 9.4400E-07
S16 -6.1695E-02 9.6071E-02 -7.5840E-02 3.3630E-02 -9.5200E-03 1.8420E-03 -2.4000E-04 1.8700E-05 -6.4000E-07
Table 26
Table 27 shows effective focal lengths f1 to f8 of the respective lenses in embodiment 9, 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 S19 of the first lens E1, a half ImgH of a diagonal length of an effective pixel region on the imaging surface S19, and a half semi-FOV of a maximum field angle.
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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 the deviation of different image heights on the imaging plane after light passes 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, the eighth lens E8, the filter E9, and the imaging surface S19.
The first lens element E1 has positive 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 convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, 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 concave 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 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 positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is convex. The eighth lens element E8 has positive refractive power, wherein an object-side surface S15 thereof is convex, and an image-side surface S16 thereof is convex. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
The optical imaging lens in this embodiment may also be provided with a stop for restricting the light beam to improve the imaging quality.
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 eighth lens element E8 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.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -4.4774E-03 3.0680E-04 -7.4500E-03 1.4016E-02 -1.7730E-02 1.2743E-02 -5.3400E-03 1.1020E-03 -7.8000E-05
S2 2.2984E-02 -1.1764E-02 7.2278E-02 -1.2343E-01 1.3037E-01 -1.0325E-01 5.3198E-02 -1.4950E-02 1.7310E-03
S3 2.1876E-02 -1.4147E-02 1.1707E-01 -2.1224E-01 2.3055E-01 -1.7191E-01 8.1944E-02 -2.1510E-02 2.3250E-03
S4 1.3823E-02 1.1017E-02 2.2836E-02 -8.9830E-02 1.3516E-01 -1.1786E-01 6.2217E-02 -1.8580E-02 2.3930E-03
S5 -8.7807E-03 5.1560E-02 1.6250E-01 -8.3737E-01 1.8398E+00 -2.3200E+00 1.7291E+00 -7.0962E-01 1.2395E-01
S6 -1.3516E-02 9.8428E-02 8.8100E-04 -8.4900E-02 -3.3885E-01 1.9586E+00 -3.3865E+00 2.6056E+00 -7.4154E-01
S7 -1.3582E-01 1.1820E-02 -8.7700E-02 3.4076E-01 -5.7273E-01 6.3231E-01 -4.2601E-01 1.6677E-01 -3.0340E-02
S8 -1.1970E-01 4.3139E-02 -2.3840E-01 7.4643E-01 -1.1886E+00 1.1719E+00 -7.1187E-01 2.4681E-01 -3.7310E-02
S9 2.3338E-02 -1.3451E-01 2.4986E-01 -2.5448E-01 1.9836E-01 -1.4148E-01 7.8542E-02 -2.5760E-02 3.5420E-03
S10 4.2207E-02 -1.4598E-01 2.7575E-01 -3.0697E-01 2.3577E-01 -1.3366E-01 5.3477E-02 -1.3000E-02 1.3950E-03
S11 -9.8383E-02 -1.0455E-01 2.9232E-01 -4.4360E-01 4.4393E-01 -2.7884E-01 1.0423E-01 -2.1070E-02 1.7730E-03
S12 -2.4194E-01 2.6546E-01 -2.3770E-01 1.2862E-01 -3.9780E-02 6.0910E-03 -1.0000E-04 -9.5000E-05 9.0800E-06
S13 -1.8537E-01 2.8344E-01 -2.5885E-01 1.4081E-01 -4.8160E-02 1.0595E-02 -1.4700E-03 1.1700E-04 -4.1000E-06
S14 -2.3923E-02 9.2868E-03 -3.4440E-02 3.3565E-02 -1.6950E-02 5.0060E-03 -8.6000E-04 7.9500E-05 -3.0000E-06
S15 8.0812E-02 -4.7695E-02 1.1125E-02 -3.4300E-03 1.5200E-03 -4.2000E-04 6.2900E-05 -4.9000E-06 1.6000E-07
S16 -3.0942E-02 7.8545E-02 -6.3270E-02 2.5404E-02 -6.0300E-03 8.9500E-04 -8.2000E-05 4.2800E-06 -9.8000E-08
Table 29
Table 30 shows effective focal lengths f1 to f8 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 S19 of the first lens E1, a half ImgH of a diagonal length of an effective pixel region on the imaging surface S19, and a half semi-FOV of a maximum field angle.
f1(mm) 4.15 f7(mm) 12.29
f2(mm) 10.08 f8(mm) 35.05
f3(mm) -3.93 f(mm) 7.01
f4(mm) 47.85 TTL(mm) 6.34
f5(mm) -216.96 ImgH(mm) 2.77
f6(mm) -4.40 semi-FOV(°) 21.6
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 different image heights on the imaging plane after light passes 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.
Example 11
An optical imaging lens according to embodiment 11 of the present application is described below with reference to fig. 21 to 22D. Fig. 21 shows a schematic structural diagram of an optical imaging lens according to embodiment 11 of the present application.
As shown in fig. 21, 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, the eighth lens E8, the filter E9, and the imaging surface S19.
The first lens element E1 has positive 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 convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, 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 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 positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The eighth lens element E8 has positive refractive power, wherein an object-side surface S15 thereof is convex, and an image-side surface S16 thereof is convex. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
The optical imaging lens in this embodiment may also be provided with a stop for restricting the light beam to improve the imaging quality.
Table 31 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 11, in which the units of the radii of curvature and the thicknesses are millimeters (mm).
Table 31
As can be seen from table 31, in example 11, the object side surface and the image side surface of any one of the first lens element E1 to the eighth lens element E8 are aspherical surfaces. Table 32 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 11, where 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 -4.3030E-03 -3.9700E-04 -6.6500E-03 1.3759E-02 -1.7870E-02 1.2881E-02 -5.3800E-03 1.1060E-03 -7.8000E-05
S2 2.3048E-02 -1.1520E-02 7.1458E-02 -1.2244E-01 1.2978E-01 -1.0307E-01 5.3177E-02 -1.4950E-02 1.7310E-03
S3 2.1637E-02 -1.3754E-02 1.1677E-01 -2.1214E-01 2.3054E-01 -1.7191E-01 8.1945E-02 -2.1520E-02 2.3250E-03
S4 1.3907E-02 1.0931E-02 2.2867E-02 -8.9820E-02 1.3515E-01 -1.1785E-01 6.2210E-02 -1.8580E-02 2.3930E-03
S5 -1.3258E-02 1.3250E-01 -4.2495E-01 1.4447E+00 -3.4352E+00 5.1716E+00 -4.6908E+00 2.3386E+00 -4.9213E-01
S6 -2.0746E-02 2.4573E-01 -1.2913E+00 6.3720E+00 -2.0321E+01 4.1059E+01 -5.0470E+01 3.4424E+01 -9.9661E+00
S7 -1.3837E-01 3.0054E-02 -1.0542E-01 2.7500E-01 -3.8611E-01 4.3063E-01 -3.2273E-01 1.4693E-01 -3.1050E-02
S8 -1.2297E-01 8.8240E-02 -5.2360E-01 1.6793E+00 -2.9705E+00 3.2494E+00 -2.1653E+00 8.0689E-01 -1.2864E-01
S9 2.6564E-02 -1.8275E-01 4.8562E-01 -8.5097E-01 1.0726E+00 -9.1332E-01 4.8375E-01 -1.4234E-01 1.7702E-02
S10 4.1340E-02 -1.3586E-01 2.3115E-01 -2.0603E-01 1.0620E-01 -3.4110E-02 7.9930E-03 -1.5800E-03 1.8200E-04
S11 -1.0059E-01 -1.0461E-01 3.0841E-01 -4.8945E-01 5.0656E-01 -3.2672E-01 1.2508E-01 -2.5910E-02 2.2370E-03
S12 -2.4060E-01 2.6376E-01 -2.3811E-01 1.3286E-01 -4.4920E-02 9.0690E-03 -1.0300E-03 5.7300E-05 -9.9000E-07
S13 -2.1543E-01 3.3631E-01 -3.4298E-01 2.0311E-01 -7.0690E-02 1.4173E-02 -1.4300E-03 3.1400E-05 3.6200E-06
S14 -8.1226E-02 8.9559E-02 -7.2950E-02 -1.8000E-04 2.6932E-02 -1.5300E-02 4.0470E-03 -5.4000E-04 2.9500E-05
S15 -4.7631E-02 1.3783E-01 -1.4880E-01 7.8929E-02 -2.6990E-02 6.4950E-03 -1.0700E-03 1.0600E-04 -4.7000E-06
S16 -1.6573E-01 2.4766E-01 -2.1197E-01 1.1568E-01 -4.1910E-02 9.8630E-03 -1.4300E-03 1.1500E-04 -3.8000E-06
Table 32
Table 33 shows effective focal lengths f1 to f8 of the respective lenses in embodiment 11, 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 S19 of the first lens E1, a half ImgH of a diagonal length of an effective pixel region on the imaging surface S19, and a half semi-FOV of a maximum field angle.
f1(mm) 4.15 f7(mm) 83.79
f2(mm) 10.08 f8(mm) 16.95
f3(mm) -3.92 f(mm) 7.05
f4(mm) 21.01 TTL(mm) 6.33
f5(mm) -31.72 ImgH(mm) 2.76
f6(mm) -4.69 semi-FOV(°) 21.4
Table 33
Fig. 22A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 11, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 22B shows an astigmatism curve of the optical imaging lens of embodiment 11, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 22C shows a distortion curve of the optical imaging lens of embodiment 11, which represents distortion magnitude values in the case of different fields of view. Fig. 22D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 11, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 22A to 22D, the optical imaging lens provided in embodiment 11 can achieve good imaging quality.
Example 12
An optical imaging lens according to embodiment 12 of the present application is described below with reference to fig. 23 to 24D. Fig. 23 shows a schematic configuration diagram of an optical imaging lens according to embodiment 12 of the present application.
As shown in fig. 23, the optical imaging lens according to the 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, the eighth lens E8, the filter E9, and the imaging surface S19.
The first lens element E1 has positive 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 convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, 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 convex and an image-side surface S12 thereof is concave. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The eighth lens element E8 has positive refractive power, wherein an object-side surface S15 thereof is concave and an image-side surface S16 thereof is convex. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
The optical imaging lens in this embodiment may also be provided with a stop for restricting the light beam to improve the imaging quality.
Table 34 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 12, in which the units of the radii of curvature and the thicknesses are millimeters (mm).
Watch 34
As can be seen from table 34, in example 12, the object side surface and the image side surface of any one of the first lens element E1 to the eighth lens element E8 are aspherical surfaces. Table 35 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 12, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Table 35
Table 36 shows effective focal lengths f1 to f8 of the respective lenses in embodiment 12, 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 S19 of the first lens E1, a half ImgH of a diagonal length of an effective pixel region on the imaging surface S19, and a half semi-FOV of a maximum field angle.
f1(mm) 4.15 f7(mm) 13.27
f2(mm) 10.08 f8(mm) 24.09
f3(mm) -3.93 f(mm) 6.83
f4(mm) 66.95 TTL(mm) 6.34
f5(mm) 5747.12 ImgH(mm) 2.70
f6(mm) -4.62 semi-FOV(°) 21.8
Table 36
Fig. 24A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 12, which indicates the deviation of the converging focus after light rays of different wavelengths pass through the lens. Fig. 24B shows an astigmatism curve of the optical imaging lens of embodiment 12, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 24C shows a distortion curve of the optical imaging lens of embodiment 12, which represents distortion magnitude values in the case of different fields of view. Fig. 24D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 12, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 24A to 24D, the optical imaging lens provided in embodiment 12 can achieve good imaging quality.
In summary, examples 1 to 12 each satisfy the relationship shown in table 37.
Conditional\embodiment 1 2 3 4 5 6
TTL/f 0.91 0.92 0.91 0.92 0.89 0.90
semi-FOV(°) 21.8 22.0 21.7 21.9 22.0 21.9
f3/f6 0.90 0.88 0.89 0.94 0.81 0.92
f/(R1+R2+R3+R4) 1.71 1.70 1.56 1.81 1.75 1.73
f/f12 2.23 2.22 2.22 2.22 2.24 2.25
R12/R13 0.34 0.38 0.36 0.37 0.15 0.40
|R5+R6|/f 1.12 1.12 1.11 1.12 1.11 1.10
(CT1+CT4+CT5)×10/TTL 1.97 1.96 1.99 1.94 1.99 1.97
CT7/(T78+CT8) 1.50 0.73 1.15 0.61 1.59 0.64
DT11/DT31 1.55 1.55 1.56 1.55 1.54 1.53
DT82/DT32 3.01 3.02 3.06 3.09 2.71 2.94
ImgH/(T34+T56) 1.86 1.87 1.83 1.94 1.86 1.89
/>
Table 37
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, a seventh lens and an eighth lens having optical power, characterized in that,
The first lens has positive 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 positive focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a convex surface;
the third lens has negative focal power, the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a concave surface;
the sixth lens has negative focal power, and the image side surface of the sixth lens is a concave surface;
the object side surface of the seventh lens is a convex surface;
the number of lenses of the optical imaging lens with focal power is eight;
the distance T34 between the effective pixel area on the imaging surface of the optical imaging lens and the third lens and the distance T56 between the third lens and the fourth lens on the optical axis satisfy the ratio of 1.6 < ImgH/(T34+T56) < 2.1.
2. The optical imaging lens according to claim 1, wherein a center thickness CT1 of the first lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, a center thickness CT5 of the fifth lens on the optical axis, and a distance TTL from an object side surface of the first lens to an imaging surface of the optical imaging lens on the optical axis satisfy 1.8 < (CT 1+ct4+ct 5) ×10/TTL < 2.3.
3. The optical imaging lens according to claim 1, wherein a center thickness CT7 of the seventh lens on the optical axis, a separation distance T78 of the seventh lens and the eighth lens on the optical axis, and a center thickness CT8 of the eighth lens on the optical axis satisfy 0.6 < CT 7/(t78+ct 8) < 1.6.
4. The optical imaging lens as claimed in claim 1, wherein a total effective focal length f of the optical imaging lens, a radius of curvature R1 of an object side surface of the first lens, a radius of curvature R2 of an image side surface of the first lens, 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 1.5 < f/(r1+r2+r3+r4) < 2.0.
5. The optical imaging lens as claimed in claim 1, wherein a radius of curvature R5 of an object side surface of the third lens, a radius of curvature R6 of an image side surface of the third lens, and a total effective focal length f of the optical imaging lens satisfy 0.9 < |r5+r6|/f < 1.4.
6. The optical imaging lens as claimed in claim 1, wherein a radius of curvature R12 of an image side surface of the sixth lens and a radius of curvature R13 of an object side surface of the seventh lens satisfy 0 < R12/R13 < 0.5.
7. The optical imaging lens according to any one of claims 2 to 6, wherein a distance TTL from an object side surface of the first lens to an imaging surface of the optical imaging lens on the optical axis and a total effective focal length f of the optical imaging lens satisfy 0.87 +.ttl/f < 1.0.
8. The optical imaging lens of claim 1, wherein a total effective focal length f of the optical imaging lens and a combined focal length f12 of the first lens and the second lens satisfy 2 < f/f12 < 2.5.
9. The optical imaging lens as claimed in claim 1, wherein an effective focal length f3 of the third lens and an effective focal length f6 of the sixth lens satisfy 0.7 < f3/f6 < 1.2.
10. The optical imaging lens of claim 1, wherein a half of a maximum field angle semi-FOV of the optical imaging lens satisfies 20 ° < semi-FOV < 25 °.
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