CN108663780B - Optical imaging lens - Google Patents

Optical imaging lens Download PDF

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Publication number
CN108663780B
CN108663780B CN201810886101.1A CN201810886101A CN108663780B CN 108663780 B CN108663780 B CN 108663780B CN 201810886101 A CN201810886101 A CN 201810886101A CN 108663780 B CN108663780 B CN 108663780B
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lens
optical imaging
optical
image
imaging lens
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CN108663780A (en
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叶丽慧
闻人建科
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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Priority to PCT/CN2019/084949 priority patent/WO2020029613A1/en
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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

Abstract

The application discloses optical imaging lens, this camera lens includes in order from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens 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, and the image side surface of the second lens is a convex surface; the image side surface of the sixth lens is a concave surface; the seventh lens element has a convex object-side surface and a concave image-side surface. The center thickness CT4 of the fourth lens on the optical axis and the interval distance T34 of the third lens and the fourth lens on the optical axis satisfy 1.5 < CT4/T34 < 2.5.

Description

Optical imaging lens
Technical Field
The present application relates to an optical imaging lens, and more particularly, to an optical imaging lens including seven lenses.
Background
In recent years, with the rapid development of portable electronic products having a photographing function, the market has increasingly demanded miniaturized optical systems suitable for the portable electronic products. Currently, the photosensitive elements of a general imaging lens are mainly two types of photosensitive coupling elements (CCDs) or complementary metal oxide semiconductor elements (CMOS). With the improvement of performances and the reduction of sizes of photosensitive elements such as CCD, CMOS and the like, higher requirements are put forward on high imaging quality and miniaturization of the matched optical imaging lens.
Disclosure of Invention
The present application provides an optical imaging lens applicable to portable electronic products that at least solves or partially solves at least one of the above-mentioned drawbacks of the prior art.
In one aspect, the present application provides an optical imaging lens sequentially including, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. The first lens element may have positive refractive power, wherein an object-side surface thereof may be convex, and an image-side surface thereof may be concave; the second lens may have positive optical power, and an image side surface thereof may be convex; the image side surface of the sixth lens element may be concave; the object-side surface of the seventh lens element may be convex, and the image-side surface thereof may be concave. The center thickness CT4 of the fourth lens on the optical axis and the interval distance T34 between the third lens and the fourth lens on the optical axis can satisfy 1.5 < CT4/T34 < 2.5.
In one embodiment, the effective focal length f5 of the fifth lens and the effective focal length f7 of the seventh lens may satisfy 0.5 < |f5/f7| < 2.
In one embodiment, the radius of curvature R12 of the image side of the sixth lens and the total effective focal length f of the optical imaging lens may satisfy 0.5 < R12/f < 1.3.
In one embodiment, the edge thickness ET5 of the fifth lens and the center thickness CT5 of the fifth lens on the optical axis may satisfy 0.5 < ET5/CT5 < 1.
In one embodiment, the radius of curvature R13 of the object side surface of the seventh lens, the radius of curvature R14 of the image side surface of the seventh lens, and half of the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens may satisfy 0.5 < (r13+r14)/ImgH < 1.5.
In one embodiment, the center thickness CT6 of the sixth lens on the optical axis and the center thickness CT7 of the seventh lens on the optical axis may satisfy 1 < CT7/CT6 < 3.
In one embodiment, the effective focal length f1 of the first lens, the radius of curvature R1 of the object side surface of the first lens, and the radius of curvature R2 of the image side surface of the first lens may satisfy 1mm < f1×r2/(r1×5) < 2mm.
In one embodiment, the effective focal length f1 of the first lens and the total effective focal length f of the optical imaging lens can satisfy 1.ltoreq.f1/f < 1.5.
In one embodiment, the combined focal length f12 of the first lens and the second lens and the combined focal length f567 of the fifth lens, the sixth lens and the seventh lens may satisfy 0.1 < |f12/f567| < 0.5.
In one embodiment, a distance TTL between an object side surface of the first lens and an imaging surface of the optical imaging lens on an optical axis and a half of a diagonal length ImgH of an effective pixel area on the imaging surface of the optical imaging lens may satisfy TTL/ImgH < 1.4.
In one embodiment, the maximum half field angle HFOV of the optical imaging lens may satisfy HFOV 45.
In another aspect, the present application provides an optical imaging lens comprising, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. The first lens element may have positive refractive power, wherein an object-side surface thereof may be convex, and an image-side surface thereof may be concave; the second lens may have positive optical power, and an image side surface thereof may be convex; the image side surface of the sixth lens element may be concave; the object-side surface of the seventh lens element may be convex, and the image-side surface thereof may be concave. The effective focal length f1 of the first lens and the total effective focal length f of the optical imaging lens can meet the condition that f1/f is smaller than or equal to 1.5.
In still another aspect, the present application further provides an optical imaging lens, including, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. The first lens element may have positive refractive power, wherein an object-side surface thereof may be convex, and an image-side surface thereof may be concave; the second lens may have positive optical power, and an image side surface thereof may be convex; the image side surface of the sixth lens element may be concave; the object-side surface of the seventh lens element may be convex, and the image-side surface thereof may be concave. 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 half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens can meet the condition that TTL/ImgH is smaller than 1.4.
In still another aspect, the present application further provides an optical imaging lens, including, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. The first lens element may have positive refractive power, wherein an object-side surface thereof may be convex, and an image-side surface thereof may be concave; the second lens may have positive optical power, and an image side surface thereof may be convex; the image side surface of the sixth lens element may be concave; the object-side surface of the seventh lens element may be convex, and the image-side surface thereof may be concave. The effective focal length f5 of the fifth lens and the effective focal length f7 of the seventh lens can meet 0.5 < |f5/f7| < 2.
In still another aspect, the present application further provides an optical imaging lens, including, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. The first lens element may have positive refractive power, wherein an object-side surface thereof may be convex, and an image-side surface thereof may be concave; the second lens may have positive optical power, and an image side surface thereof may be convex; the image side surface of the sixth lens element may be concave; the object-side surface of the seventh lens element may be convex, and the image-side surface thereof may be concave. Wherein the combined focal length f12 of the first lens and the second lens and the combined focal length f567 of the fifth lens, the sixth lens and the seventh lens can satisfy 0.1 < |f12/f567| < 0.5.
In still another aspect, the present application further provides an optical imaging lens, including, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. The first lens element may have positive refractive power, wherein an object-side surface thereof may be convex, and an image-side surface thereof may be concave; the second lens may have positive optical power, and an image side surface thereof may be convex; the image side surface of the sixth lens element may be concave; the object-side surface of the seventh lens element may be convex, and the image-side surface thereof may be concave. The thickness ET5 of the edge of the fifth lens and the thickness CT5 of the center of the fifth lens on the optical axis can satisfy 0.5 < ET5/CT5 < 1.
In still another aspect, the present application further provides an optical imaging lens, including, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. The first lens element may have positive refractive power, wherein an object-side surface thereof may be convex, and an image-side surface thereof may be concave; the second lens may have positive optical power, and an image side surface thereof may be convex; the image side surface of the sixth lens element may be concave; the object-side surface of the seventh lens element may be convex, and the image-side surface thereof may be concave. The radius of curvature R13 of the object side surface of the seventh lens, the radius of curvature R14 of the image side surface of the seventh lens and half of the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens can satisfy 0.5 < (r13+r14)/ImgH < 1.5.
In still another aspect, the present application further provides an optical imaging lens, including, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. The first lens element may have positive refractive power, wherein an object-side surface thereof may be convex, and an image-side surface thereof may be concave; the second lens may have positive optical power, and an image side surface thereof may be convex; the image side surface of the sixth lens element may be concave; the object-side surface of the seventh lens element may be convex, and the image-side surface thereof may be concave. The effective focal length f1 of the first lens, the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens may satisfy 1mm < f1×r2/(r1×5) < 2mm.
In still another aspect, the present application further provides an optical imaging lens, including, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. The first lens element may have positive refractive power, wherein an object-side surface thereof may be convex, and an image-side surface thereof may be concave; the second lens may have positive optical power, and an image side surface thereof may be convex; the image side surface of the sixth lens element may be concave; the object-side surface of the seventh lens element may be convex, and the image-side surface thereof may be concave. The maximum half field angle HFOV of the optical imaging lens can meet the HFOV of more than or equal to 45 degrees.
Seven lenses are adopted, and the focal power, the surface shape, the center thickness of each lens, the axial spacing between each lens and the like of each lens are reasonably distributed, so that the optical imaging lens has at least one beneficial effect of ultra-thin, large aperture, excellent 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 of the optical imaging lens of embodiment 8, respectively.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that 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, seven lenses having optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The seven lenses are sequentially arranged from the object side to the image side along the optical axis, and each adjacent lens can have an air space therebetween.
In an exemplary embodiment, the first lens may have positive optical power, an object-side surface thereof may be convex, and an image-side surface thereof may be concave; the second lens may have positive optical power, and an image side surface thereof may be convex; the third lens has positive optical power or negative optical power; 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 has positive focal power or negative focal power, and the image side surface of the sixth lens can be concave; the seventh lens element with positive or negative refractive power may have a convex object-side surface and a concave image-side surface.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.5 < CT4/T34 < 2.5, where CT4 is the center thickness of the fourth lens on the optical axis, and T34 is the separation distance between the third lens and the fourth lens on the optical axis. More specifically, CT4 and T34 may further satisfy 1.56.ltoreq.CT 4/T34.ltoreq.2.24. The air interval of the third lens and the fourth lens on the optical axis and the center thickness of the fourth lens are reasonably configured, so that the lens has better distortion eliminating capability while keeping the miniaturization characteristic.
In an exemplary embodiment, the optical imaging lens can satisfy the condition that f1/f < 1.5, wherein f1 is an effective focal length of the first lens, and f is a total effective focal length of the optical imaging lens. More specifically, f1 and f may further satisfy 1.04.ltoreq.f1/f.ltoreq.1.33. The negative focal power of the first lens is controlled in a reasonable range, so that the integral focal length of the imaging lens is increased, and the effect of balancing field curvature can be achieved.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition that TTL/ImgH < 1.4, 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 ImgH is a half of a diagonal length of an effective pixel area on the imaging surface of the optical imaging lens. More specifically, TTL and ImgH can further satisfy 1.18.ltoreq.TTL/ImgH.ltoreq.1.22. The smaller the ratio of TTL to ImgH, the shorter the total optical length TTL of the lens under the condition of the same imaging surface size, thereby being beneficial to realizing the ultrathin characteristic of the optical imaging lens while meeting the imaging quality. By reasonably controlling the ratio between the total optical length and the image height of the imaging lens, the total size of the imaging lens can be effectively compressed, and the ultra-thin characteristic and miniaturization of the imaging lens are realized, so that the imaging lens can be well applied to a system with limited size.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.5 < |f5/f7| < 2, where f5 is an effective focal length of the fifth lens and f7 is an effective focal length of the seventh lens. More specifically, f5 and f7 may further satisfy 0.64.ltoreq.f5/f7.ltoreq.1.74. The focal power of the fifth lens and the seventh lens are reasonably distributed, the focal power of the rear section of the imaging lens is controlled in a smaller range, and the deflection angle of light rays can be reduced, so that the sensitivity of the imaging lens is reduced.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.5 < R12/f < 1.3, where R12 is a radius of curvature of an image side surface of the sixth lens element, and f is a total effective focal length of the optical imaging lens element. More specifically, R12 and f may further satisfy 0.64.ltoreq.R12/f.ltoreq.1.08. The curvature radius of the object side surface of the sixth lens is reasonably arranged, so that the light deflection angle can be regulated and controlled, and the system can be easily matched with a common chip.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.1 < |f12/f567| < 0.5, where f12 is a combined focal length of the first lens and the second lens, and f567 is a combined focal length of the fifth lens, the sixth lens, and the seventh lens. More specifically, f12 and f567 further satisfy 0.11.ltoreq.f12/f 567.ltoreq.0.43. The combined focal length of the first lens and the second lens and the combined focal length of the fifth lens, the sixth lens and the seventh lens are reasonably controlled, so that the distortion of a paraxial region at an image plane can be effectively corrected, and the imaging quality of the lens is improved.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.5 < ET5/CT5 < 1, where ET5 is an edge thickness of the fifth lens and CT5 is a center thickness of the fifth lens on the optical axis. More specifically, ET5 and CT5 may further satisfy 0.60.ltoreq.ET 5/CT 5.ltoreq.0.82. The edge thickness and the center thickness of the fifth lens are reasonably controlled, so that the incidence angle of light on the image side surface of the fifth lens can be effectively controlled, and the imaging quality of the optical imaging lens is improved.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition that (r13+r14)/ImgH < 1.5, where R13 is a radius of curvature of an object side surface of the seventh lens, R14 is a radius of curvature of an image side surface of the seventh lens, and ImgH is half of a diagonal length of an effective pixel region on an imaging surface of the optical imaging lens. More specifically, R13, R14 and ImgH may further satisfy 0.71.ltoreq.R13+R14/ImgH.ltoreq.1.37. The field curvature of the optical imaging lens is regulated and controlled by reasonably controlling the size and the direction of the curvature radius of the object side surface and the image side surface of the seventh lens, so that the overall aberration of the optical imaging lens is corrected.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition that 1 < CT7/CT6 < 3, where CT6 is a center thickness of the sixth lens element on the optical axis, and CT7 is a center thickness of the seventh lens element on the optical axis. More specifically, CT6 and CT7 may further satisfy 1.10.ltoreq.CT7/CT 6.ltoreq.2.92. The center thickness of the sixth lens and the center thickness of the seventh lens are reasonably controlled, so that the uniform distribution of lens sizes is facilitated, the assembly stability is ensured, the aberration of the whole optical imaging lens is reduced, and the total length of the optical imaging lens is shortened.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1mm < f1×r2/(r1×5) < 2mm, where f1 is an effective focal length of the first lens, R1 is a radius of curvature of an object side surface of the first lens, and R2 is a radius of curvature of an image side surface of the first lens. More specifically, f1, R1 and R2 may further satisfy 1.49 mm.ltoreq.f1.times.R2/(R1.times.5). Ltoreq.1.91 mm. The effective focal length of the first lens and the curvature radiuses of the object side surface and the image side surface of the first lens are reasonably configured, so that the deflection of light rays at the first lens can be effectively controlled, and the sensitivity of the lens is reduced; meanwhile, the spherical aberration, astigmatism and the like of the system are reduced, and the imaging quality of the optical imaging lens can be effectively improved.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression HFOV 45 or more, where HFOV is the maximum half field angle of the optical imaging lens. More specifically, HFOV's further may satisfy 45.1 and 47.2. On the premise of keeping the miniaturization of the lens, the problems of overlarge aberration of the marginal field of view, low illuminance and the like can be effectively avoided by controlling the field angle, and the excellent imaging quality of the lens in a wider field angle is ensured.
The optical imaging lens according to the above-described embodiments of the present application may employ a plurality of lenses, such as seven lenses described above. By reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial spacing between each lens and the like, the volume of the lens can be effectively reduced, the sensitivity of the lens can be reduced, and the processability of the lens can be improved, so that the optical imaging lens is more beneficial to production and processing and is applicable to portable electronic products. The optical imaging lens with the configuration can also have the beneficial effects of ultra-thin, large aperture, excellent imaging quality and the like.
In an embodiment of the present application, at least one of the mirrors of each lens is an aspherical mirror. The aspherical lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality.
However, it will be appreciated by those skilled in the art that the number of lenses making up the optical imaging lens may be varied to achieve the various results and advantages described in the specification without departing from the technical solutions claimed herein. For example, although seven lenses are described as an example in the embodiment, the optical imaging lens is not limited to include seven lenses. The optical imaging lens may also include other numbers of lenses, if desired.
Specific examples of the optical imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.
Example 1
An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic configuration diagram of an optical imaging lens according to embodiment 1 of the present application.
As shown in fig. 1, an optical imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging plane S17.
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 convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave, and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Table 1 shows 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).
Figure BDA0001755693930000101
Figure BDA0001755693930000111
TABLE 1
As can be seen from table 1, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspheric. In the present embodiment, the surface shape x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:
Figure BDA0001755693930000112
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-S14 in example 1 4 、A 6 、A 8 、A 10 、A 12 、A 14 And A 16 。
Figure BDA0001755693930000113
Figure BDA0001755693930000121
TABLE 2
Table 3 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 1, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 to the imaging surface S17 of the first lens E1, half the diagonal length ImgH of the effective pixel region on the imaging surface S17, and the maximum half field angle HFOV.
f1(mm) 3.69 f7(mm) -20.51
f2(mm) 6.74 f(mm) 3.28
f3(mm) -6.13 TTL(mm) 4.00
f4(mm) 16.32 ImgH(mm) 3.29
f5(mm) 13.71 HFOV(°) 45.6
f6(mm) -5.76
TABLE 3 Table 3
The optical imaging lens in embodiment 1 satisfies:
CT 4/t34=2.24, where CT4 is the center thickness of the fourth lens E4 on the optical axis, and T34 is the separation distance of the third lens E3 and the fourth lens E4 on the optical axis;
f1/f=1.12, where f1 is the effective focal length of the first lens E1, and f is the total effective focal length of the optical imaging lens;
TTL/imgh=1.22, where TTL is the distance between the object side surface S1 of the first lens E1 and the imaging surface S17 on the optical axis, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface S17;
i f5/f7 i=0.67, where f5 is the effective focal length of the fifth lens E5 and f7 is the effective focal length of the seventh lens E7;
r12/f=1.08, where R12 is the radius of curvature of the image side surface S12 of the sixth lens E6, and f is the total effective focal length of the optical imaging lens;
f12/f567|=0.38, wherein f12 is the combined focal length of the first lens E1 and the second lens E2, and f567 is the combined focal length of the fifth lens E5, the sixth lens E6 and the seventh lens E7;
ET5/CT5 = 0.81, where ET5 is the edge thickness of the fifth lens E5, CT5 is the center thickness of the fifth lens E5 on the optical axis;
(r13+r14)/imgh=1.37, where R13 is the radius of curvature of the object side surface S13 of the seventh lens element E7, R14 is the radius of curvature of the image side surface S14 of the seventh lens element E7, and ImgH is half the diagonal length of the effective pixel region on the imaging surface S17;
CT 7/ct6=1.79, wherein CT6 is the center thickness of the sixth lens E6 on the optical axis, and CT7 is the center thickness of the seventh lens E7 on the optical axis;
f1×r2/(r1×5) =1.58 mm, where f1 is the effective focal length of the first lens element E1, R1 is the radius of curvature of the object-side surface S1 of the first lens element E1, and R2 is the radius of curvature of the image-side surface S2 of the first lens element E1.
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 the corresponding distortion magnitude values at different image heights. 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: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging plane S17.
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 concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has 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 filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
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).
Figure BDA0001755693930000141
TABLE 4 Table 4
As can be seen from table 4, in embodiment 2, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 5 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 2, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16
S1 -4.0889E-02 3.3165E-01 -2.2951E+00 8.7067E+00 -1.8877E+01 2.1689E+01 -1.0355E+01
S2 -3.0519E-02 -3.4553E-02 -2.4512E-01 1.3362E+00 -3.9130E+00 4.7742E+00 -1.2999E+00
S3 -1.0784E-01 9.3054E-02 -1.4967E+00 6.6221E+00 -1.5760E+01 1.9685E+01 -8.2590E+00
S4 -1.8529E-01 -1.0683E+00 7.9844E+00 -2.5192E+01 4.3817E+01 -3.9952E+01 1.5330E+01
S5 -1.9757E-01 -1.0754E+00 6.8934E+00 -2.1032E+01 3.4916E+01 -3.1816E+01 1.2037E+01
S6 2.4903E-02 -8.0061E-01 3.8339E+00 -1.3761E+01 2.8612E+01 -3.3497E+01 1.6879E+01
S7 -5.5954E-02 -2.5344E-01 1.9576E+00 -8.4425E+00 1.8140E+01 -2.0908E+01 9.4495E+00
S8 -1.4776E-01 2.3742E-01 -2.3727E-01 1.0900E-01 -2.4923E-02 2.7765E-03 -1.2037E-04
S9 -1.3978E-01 6.3493E-02 -3.0936E-01 3.4331E-01 -1.5897E-01 -2.2289E-02 2.3945E-02
S10 -1.0938E-01 -2.1369E-02 -2.1546E-02 2.2962E-02 -6.3502E-03 -2.3064E-03 7.5995E-04
S11 1.8465E-02 -4.1479E-01 4.7647E-01 -2.6296E-01 3.4749E-02 2.3282E-02 -6.7679E-03
S12 -1.3381E-01 -2.4512E-01 8.2441E-02 7.3633E-02 -5.0280E-02 1.1054E-02 -8.5380E-04
S13 6.5432E-02 -6.4864E-01 5.8317E-01 -2.3565E-01 5.0497E-02 -5.6174E-03 2.5686E-04
S14 -2.0613E-01 -1.5815E-02 7.5766E-02 -4.3074E-02 1.0680E-02 -1.2381E-03 5.3963E-05
TABLE 5
Table 6 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 2, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 to the imaging surface S17 of the first lens E1, half the diagonal length ImgH of the effective pixel region on the imaging surface S17, and the maximum half field angle HFOV.
f1(mm) 3.94 f7(mm) 31.20
f2(mm) 4.49 f(mm) 3.26
f3(mm) -5.16 TTL(mm) 3.88
f4(mm) 62.46 ImgH(mm) 3.29
f5(mm) 36.43 HFOV(°) 45.9
f6(mm) -5.18
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 the corresponding distortion magnitude values at different image heights. 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: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging plane S17.
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 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 filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
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).
Figure BDA0001755693930000161
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Figure BDA0001755693930000171
TABLE 7
As is clear from table 7, in embodiment 3, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 8 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 3, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16
S1 -3.3707E-02 2.4864E-01 -1.6578E+00 6.0873E+00 -1.2834E+01 1.4462E+01 -6.8664E+00
S2 -2.0177E-02 -1.0394E-01 5.5330E-01 -2.7218E+00 7.2415E+00 -1.0510E+01 6.5419E+00
S3 -8.7901E-02 8.0191E-02 -8.9190E-01 3.3107E+00 -5.8638E+00 4.6637E+00 1.3045E-01
S4 -4.1420E-01 2.8562E+00 -1.6074E+01 5.4934E+01 -1.0979E+02 1.1930E+02 -5.4421E+01
S5 -5.4111E-01 2.9143E+00 -1.7153E+01 5.9045E+01 -1.2006E+02 1.3313E+02 -6.2999E+01
S6 -1.9622E-01 2.3610E-01 -5.4806E-01 -1.2471E+00 6.5843E+00 -9.9834E+00 5.5798E+00
S7 -3.3506E-02 -6.9880E-02 1.5125E+00 -5.9328E+00 1.0369E+01 -8.9773E+00 3.1278E+00
S8 -2.7033E-02 -5.0053E-01 2.5568E+00 -5.7269E+00 6.8258E+00 -4.2008E+00 1.0468E+00
S9 4.8860E-02 -8.6650E-01 1.6873E+00 -2.1899E+00 1.8832E+00 -1.1159E+00 3.1297E-01
S10 3.5368E-01 -1.1437E+00 1.5615E+00 -1.2667E+00 6.1240E-01 -1.6281E-01 1.8083E-02
S11 2.8069E-01 -6.9057E-01 4.8952E-01 -1.2077E-01 -1.5558E-02 1.3076E-02 -1.9131E-03
S12 -7.4200E-02 -1.6164E-01 -2.6494E-02 1.2295E-01 -6.0273E-02 1.1806E-02 -8.4770E-04
S13 6.6853E-02 -6.6620E-01 6.0391E-01 -2.4434E-01 5.2116E-02 -5.7378E-03 2.5826E-04
S14 -1.0249E-01 -1.4585E-01 1.5278E-01 -6.7922E-02 1.5776E-02 -1.8751E-03 8.9816E-05
TABLE 8
Table 9 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 3, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 to the imaging surface S17 of the first lens E1, half the diagonal length ImgH of the effective pixel region on the imaging surface S17, and the maximum half field angle HFOV.
Figure BDA0001755693930000172
Figure BDA0001755693930000181
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 the corresponding distortion magnitude values at different image heights. 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: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging plane S17.
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 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 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 filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
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).
Figure BDA0001755693930000191
Table 10
As can be seen from table 10, in example 4, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 11 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 4, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Figure BDA0001755693930000192
Figure BDA0001755693930000201
TABLE 11
Table 12 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 4, 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 S17 of the first lens E1, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, and a maximum half field angle HFOV.
f1(mm) 3.84 f7(mm) 24.32
f2(mm) 4.68 f(mm) 3.23
f3(mm) -5.50 TTL(mm) 3.88
f4(mm) -69.85 ImgH(mm) 3.29
f5(mm) 23.32 HFOV(°) 45.9
f6(mm) -5.37
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 the corresponding distortion magnitude values at different image heights. 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: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging plane S17.
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 convex. 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 negative refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is 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 filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
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).
Figure BDA0001755693930000211
TABLE 13
As is clear from table 13, in example 5, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 14 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 5, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16
S1 -3.2581E-03 3.5657E-02 -2.2684E-01 9.0302E-01 -2.0393E+00 2.3486E+00 -1.0708E+00
S2 -4.7654E-02 -1.2329E-02 -3.2491E-01 1.5896E+00 -4.1754E+00 5.1579E+00 -2.0855E+00
S3 -1.5882E-01 6.5376E-02 -7.6273E-01 3.0683E+00 -6.6941E+00 8.0498E+00 -3.6110E+00
S4 8.8408E-02 -3.6780E+00 1.7878E+01 -4.6323E+01 7.1293E+01 -6.1734E+01 2.3770E+01
S5 2.1672E-01 -3.6306E+00 1.5901E+01 -4.0107E+01 5.9400E+01 -4.9359E+01 1.8184E+01
S6 2.3075E-01 -8.8510E-01 2.5959E+00 -6.9975E+00 1.1876E+01 -1.1461E+01 4.9169E+00
S7 -1.1857E-01 -3.9602E-01 1.2749E+00 -2.0082E+00 1.4594E+00 -3.2383E-01 -2.2959E-01
S8 -2.8945E-02 -4.2142E-01 1.0250E+00 -1.5700E+00 1.7188E+00 -1.0675E+00 2.6350E-01
S9 1.7714E-01 -3.2277E-01 3.1791E-01 -4.7282E-01 4.2777E-01 -1.6511E-01 1.9315E-02
S10 -1.2642E-01 3.4397E-01 -5.0094E-01 3.3321E-01 -1.1348E-01 1.8713E-02 -1.0763E-03
S11 2.6554E-02 -7.2198E-02 2.7982E-03 1.2533E-02 -7.1689E-03 1.8007E-03 -1.7629E-04
S12 7.4339E-05 -7.7555E-02 3.9463E-02 -1.0963E-02 1.7483E-03 -1.4916E-04 5.3725E-06
S13 -2.3767E-01 8.4248E-02 -1.4190E-02 1.3821E-03 -8.7526E-05 4.2448E-06 -1.3278E-07
S14 -1.5832E-01 8.8522E-02 -4.1459E-02 1.2014E-02 -2.0249E-03 1.8216E-04 -6.7127E-06
TABLE 14
Table 15 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 5, 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 S17 of the first lens E1, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, and a maximum half field angle HFOV.
f1(mm) 3.97 f7(mm) -5.80
f2(mm) 5.16 f(mm) 3.23
f3(mm) -6.31 TTL(mm) 4.01
f4(mm) -198.19 ImgH(mm) 3.29
f5(mm) -10.10 HFOV(°) 46.0
f6(mm) 5.98
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 the corresponding distortion magnitude values at different image heights. 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: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging plane S17.
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 convex. 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 negative refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is 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 filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
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).
Figure BDA0001755693930000231
Figure BDA0001755693930000241
Table 16
As is clear from table 16, in example 6, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 17 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 6, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16
S1 -1.2807E-02 1.2642E-01 -7.6507E-01 2.4313E+00 -4.4988E+00 4.3215E+00 -1.7656E+00
S2 -4.0021E-02 -5.7006E-02 -4.3987E-02 2.1278E-01 -7.7926E-01 8.0893E-01 -1.2974E-01
S3 -1.3976E-01 -7.9250E-03 -2.9170E-01 1.0088E+00 -2.0825E+00 2.6610E+00 -1.1662E+00
S4 5.6950E-02 -3.3951E+00 1.7291E+01 -4.7175E+01 7.6304E+01 -6.8542E+01 2.6644E+01
S5 1.7936E-01 -3.3015E+00 1.4933E+01 -3.9512E+01 6.1816E+01 -5.3923E+01 2.0290E+01
S6 2.2528E-01 -8.8154E-01 2.6215E+00 -6.6969E+00 1.0524E+01 -9.4533E+00 3.7316E+00
S7 -1.0262E-01 -5.2638E-01 1.5058E+00 -1.7462E+00 6.2873E-01 1.9941E-01 -2.1961E-01
S8 -1.2998E-02 -5.2227E-01 9.9701E-01 -1.1829E+00 1.2138E+00 -7.8436E-01 1.9922E-01
S9 1.7915E-01 -1.3060E-01 -2.9271E-01 4.1630E-01 -2.4177E-01 8.1500E-02 -1.6344E-02
S10 -1.7172E-01 5.3276E-01 -8.3700E-01 6.7279E-01 -3.0554E-01 7.5090E-02 -7.7604E-03
S11 1.0044E-01 -1.7859E-01 8.1957E-02 -2.7519E-02 9.4868E-03 -3.2931E-03 4.9951E-04
S12 1.3044E-01 -2.4713E-01 1.5627E-01 -5.9525E-02 1.3851E-02 -1.8358E-03 1.0616E-04
S13 -2.3775E-01 8.4244E-02 -1.4189E-02 1.3820E-03 -8.7565E-05 4.2134E-06 -1.4459E-07
S14 -1.6610E-01 9.3386E-02 -4.1868E-02 1.1512E-02 -1.8426E-03 1.5956E-04 -5.7948E-06
TABLE 17
Table 18 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 6, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 to the imaging surface S17 of the first lens E1, half the diagonal length ImgH of the effective pixel region on the imaging surface S17, and the maximum half field angle HFOV.
Figure BDA0001755693930000242
Figure BDA0001755693930000251
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 the corresponding distortion magnitude values at different image heights. 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: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging plane S17.
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 convex. 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 negative refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is 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 filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
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).
Figure BDA0001755693930000261
TABLE 19
As is clear from table 19, in example 7, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 20 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 7, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Figure BDA0001755693930000262
Figure BDA0001755693930000271
Table 20
Table 21 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 7, a total effective focal length f of the optical imaging lens, a distance TTL on the optical axis from the object side surface S1 to the imaging surface S17 of the first lens E1, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, and a maximum half field angle HFOV.
f1(mm) 4.12 f7(mm) -7.45
f2(mm) 5.03 f(mm) 3.10
f3(mm) -6.52 TTL(mm) 4.03
f4(mm) -115.74 ImgH(mm) 3.29
f5(mm) -6.73 HFOV(°) 47.2
f6(mm) 4.57
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 the corresponding distortion magnitude values at different image heights. 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: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging plane S17.
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 concave and an image-side surface S4 thereof is convex. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has negative 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 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 negative refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
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).
Figure BDA0001755693930000281
Table 22
As can be seen from table 22, in example 8, the object side surface and the image side surface of any one of the first lens element E1 to the seventh lens element E7 are aspherical surfaces. Table 23 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 8, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16
S1 -3.4723E-02 2.4174E-01 -1.5543E+00 5.5235E+00 -1.1458E+01 1.2829E+01 -6.2581E+00
S2 -1.4943E-02 -1.3580E-01 9.8759E-01 -5.0836E+00 1.4198E+01 -2.1852E+01 1.3981E+01
S3 -1.0166E-01 2.0886E-01 -1.3832E+00 6.0018E+00 -1.3759E+01 1.5104E+01 -4.4588E+00
S4 -7.8578E-01 4.4876E+00 -2.1215E+01 6.9472E+01 -1.4577E+02 1.7339E+02 -8.7455E+01
S5 -7.3087E-01 3.9614E+00 -2.0980E+01 7.2603E+01 -1.6174E+02 2.0308E+02 -1.0867E+02
S6 -4.9762E-02 -4.8337E-01 2.7945E+00 -1.1645E+01 2.5770E+01 -2.9846E+01 1.4969E+01
S7 4.8126E-02 -4.6501E-01 2.7943E+00 -9.2021E+00 1.5960E+01 -1.4971E+01 6.0890E+00
S8 -7.7813E-03 -5.2622E-01 2.3301E+00 -4.8127E+00 5.4087E+00 -3.1633E+00 7.4934E-01
S9 -9.4123E-02 -4.9792E-01 1.0981E+00 -1.5408E+00 1.4644E+00 -9.9981E-01 3.1166E-01
S10 1.3953E-01 -6.8926E-01 9.9419E-01 -8.2456E-01 4.0889E-01 -1.1369E-01 1.3461E-02
S11 7.9602E-02 -3.7460E-01 1.8245E-01 1.0314E-01 -1.2406E-01 4.1895E-02 -4.9665E-03
S12 -8.2264E-02 -1.7615E-01 2.2110E-02 7.9765E-02 -4.2701E-02 8.4086E-03 -5.9419E-04
S13 6.6849E-02 -6.2755E-01 5.5599E-01 -2.2031E-01 4.6084E-02 -4.9822E-03 2.2045E-04
S14 -1.4560E-01 -7.8397E-02 1.0153E-01 -4.6416E-02 1.0714E-02 -1.2494E-03 5.8299E-05
Table 23
Table 24 shows effective focal lengths f1 to f7 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 the object side surface S1 to the imaging surface S17 of the first lens E1, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, and a maximum half field angle HFOV.
f1(mm) 3.37 f7(mm) -27.47
f2(mm) 22.43 f(mm) 3.25
f3(mm) 110.71 TTL(mm) 3.94
f4(mm) -22.17 ImgH(mm) 3.29
f5(mm) -33.66 HFOV(°) 45.1
f6(mm) -14.59
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 the corresponding distortion magnitude values at different image heights. 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.
In summary, examples 1 to 8 each satisfy the relationship shown in table 25.
Condition/example 1 2 3 4 5 6 7 8
f1/f 1.12 1.21 1.14 1.19 1.23 1.31 1.33 1.04
TTL/ImgH 1.22 1.18 1.21 1.18 1.22 1.22 1.22 1.20
|f5/f7| 0.67 1.17 0.64 0.96 1.74 0.95 0.90 1.23
R12/f 1.08 0.67 0.98 0.65 0.64 0.86 0.89 1.00
|f12/f567| 0.38 0.33 0.27 0.25 0.20 0.12 0.11 0.43
ET5/CT5 0.81 0.60 0.79 0.62 0.66 0.74 0.79 0.82
(R13+R14)/ImgH 1.37 1.06 1.30 1.06 0.82 0.73 0.71 1.31
CT4/T34 2.24 2.13 2.01 1.56 1.65 1.81 1.84 1.98
CT7/CT6 1.79 2.82 1.75 2.92 1.10 1.20 1.19 1.42
f1×R2/(R1×5)(mm) 1.58 1.49 1.54 1.50 1.74 1.85 1.91 1.53
HFOV(°) 45.6 45.9 45.6 45.9 46.0 47.2 47.2 45.1
Table 25
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 (20)

1. The optical imaging lens sequentially comprises, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens 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, and the image side surface of the second lens is a convex surface;
the image side surface of the sixth lens is a concave surface;
the object side surface of the seventh lens is a convex surface, and the image side surface is a concave surface;
the center thickness CT4 of the fourth lens on the optical axis and the interval distance T34 of the third lens and the fourth lens on the optical axis satisfy 1.5 < CT4/T34 < 2.5;
the effective focal length f1 of the first lens, the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens satisfy 1mm < f1×R2/(R1×5) < 2mm;
the number of lenses of the optical imaging lens with focal power is seven; and
at least one of the first to seventh lenses is an aspherical lens.
2. The optical imaging lens according to claim 1, wherein an effective focal length f5 of the fifth lens and an effective focal length f7 of the seventh lens satisfy 0.5 < |f5/f7| < 2.
3. 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 total effective focal length f of the optical imaging lens satisfy 0.5 < R12/f < 1.3.
4. The optical imaging lens as claimed in claim 1, wherein an edge thickness ET5 of the fifth lens and a center thickness CT5 of the fifth lens on the optical axis satisfy 0.5 < ET5/CT5 < 1.
5. The optical imaging lens as claimed in claim 1, wherein a radius of curvature R13 of an object side surface of the seventh lens, a radius of curvature R14 of an image side surface of the seventh lens, and a half of a diagonal length ImgH of an effective pixel region on an imaging surface of the optical imaging lens satisfy 0.5 < (r13+r14)/ImgH < 1.5.
6. The optical imaging lens according to claim 1, wherein a center thickness CT6 of the sixth lens on the optical axis and a center thickness CT7 of the seventh lens on the optical axis satisfy 1 < CT7/CT6 < 3.
7. The optical imaging lens as claimed in claim 1, wherein an effective focal length f1 of the first lens and a total effective focal length f of the optical imaging lens satisfy 1.ltoreq.f1/f < 1.5.
8. The optical imaging lens according to claim 1, wherein a combined focal length f12 of the first lens and the second lens and a combined focal length f567 of the fifth lens, the sixth lens and the seventh lens satisfy 0.1 < |f12/f567| < 0.5.
9. The optical imaging lens according to any one of claims 1 to 8, wherein a distance TTL on an optical axis from an object side surface of the first lens to an imaging surface of the optical imaging lens and a half of a diagonal length ImgH of an effective pixel region on the imaging surface of the optical imaging lens satisfy TTL/ImgH < 1.4.
10. The optical imaging lens of any of claims 1 to 8, wherein the maximum half field angle HFOV of the optical imaging lens satisfies HFOV ≡45 °.
11. The optical imaging lens sequentially comprises, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens 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, and the image side surface of the second lens is a convex surface;
the image side surface of the sixth lens is a concave surface;
the object side surface of the seventh lens is a convex surface, and the image side surface is a concave surface;
the effective focal length f1 of the first lens and the total effective focal length f of the optical imaging lens are more than or equal to 1 and less than or equal to 1/f and less than 1.5;
the effective focal length f1 of the first lens, the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens satisfy 1mm < f1×R2/(R1×5) < 2mm;
The number of lenses of the optical imaging lens with focal power is seven; and
at least one of the first to seventh lenses is an aspherical lens.
12. The optical imaging lens of claim 11, wherein a combined focal length f12 of the first lens and the second lens and a combined focal length f567 of the fifth lens, the sixth lens and the seventh lens satisfy 0.1 < |f12/f567| < 0.5.
13. The optical imaging lens of claim 11, wherein an effective focal length f5 of the fifth lens and an effective focal length f7 of the seventh lens satisfy 0.5 < |f5/f7| < 2.
14. The optical imaging lens of claim 11, wherein a radius of curvature R12 of an image side surface of the sixth lens and a total effective focal length f of the optical imaging lens satisfy 0.5 < R12/f < 1.3.
15. The optical imaging lens as claimed in claim 11, wherein a radius of curvature R13 of an object side surface of the seventh lens, a radius of curvature R14 of an image side surface of the seventh lens, and a half of a diagonal length ImgH of an effective pixel region on an imaging surface of the optical imaging lens satisfy 0.5 < (r13+r14)/ImgH < 1.5.
16. The optical imaging lens of claim 11, wherein the maximum half field angle HFOV of the optical imaging lens satisfies HFOV ≡45 °.
17. The optical imaging lens of any of claims 12 to 16, wherein a distance TTL on an optical axis from an object side surface of the first lens to an imaging surface of the optical imaging lens and a half of a diagonal length ImgH of an effective pixel area on the imaging surface of the optical imaging lens satisfy TTL/ImgH < 1.4.
18. The optical imaging lens of claim 17, wherein a center thickness CT4 of the fourth lens on the optical axis and a separation distance T34 of the third lens and the fourth lens on the optical axis satisfy 1.5 < CT4/T34 < 2.5.
19. The optical imaging lens of claim 17, wherein an edge thickness ET5 of the fifth lens and a center thickness CT5 of the fifth lens on the optical axis satisfy 0.5 < ET5/CT5 < 1.
20. The optical imaging lens according to claim 17, wherein a center thickness CT6 of the sixth lens on the optical axis and a center thickness CT7 of the seventh lens on the optical axis satisfy 1 < CT7/CT6 < 3.
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