CN109283665B - Imaging lens - Google Patents

Imaging lens Download PDF

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Publication number
CN109283665B
CN109283665B CN201811494063.1A CN201811494063A CN109283665B CN 109283665 B CN109283665 B CN 109283665B CN 201811494063 A CN201811494063 A CN 201811494063A CN 109283665 B CN109283665 B CN 109283665B
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Prior art keywords
lens
imaging
image
imaging lens
axis direction
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CN109283665A (en
Inventor
叶丽慧
王馨
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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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
    • 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 imaging lens, this 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 and a seventh lens. The first lens has positive focal power, and the object side surface of the first lens is a convex surface; the second lens has optical power, and the image side surface of the second lens is a concave surface; the third lens has optical power; the four lenses have optical power, the object side surface of the four lenses is a convex surface, and the image side surface of the four lenses is a concave surface; the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power, and the image side surface of the sixth lens is a concave surface; the seventh lens has negative focal power, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface; and at least one of the first lens to the seventh lens has an aspherical surface that is non-rotationally symmetrical.

Description

Imaging lens
Technical Field
The present application relates to an imaging lens, and more particularly, to an imaging lens including seven lenses.
Background
In recent years, with the rapid development of lens modules of mobile phones, particularly the popularization of large-size and high-pixel CMOS chips, manufacturers of large mobile phones have put stringent demands on imaging quality of the lenses while pursuing the ultra-thin lenses. Currently, the mainstream mobile phone lens generally adopts a rotationally symmetrical (axisymmetric) aspheric surface as its planar structure.
Currently, lenses (for example, rear lenses of mobile phones) used in portable electronic products such as mobile phones mostly adopt seven-piece structures, and the lens surfaces are mostly rotationally symmetrical (axisymmetrical) aspheric surfaces. Such rotationally symmetrical aspherical surfaces can be seen as a curve in the meridian plane which is formed by 360 ° rotation around the optical axis, and thus have sufficient degrees of freedom only in the meridian plane and do not correct off-axis aberrations well.
Disclosure of Invention
The present application provides an imaging lens applicable to portable electronic products, which can at least solve or partially solve at least one of the above-mentioned drawbacks in the prior art, such as an imaging lens applicable to a rear lens of a mobile phone.
In one aspect, the present application provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface; the second lens has positive focal power or negative focal power, and the image side surface of the second lens can be concave; the third lens has positive optical power or negative optical power; the fourth lens element with positive or negative focal power has a convex object-side surface and a concave image-side surface; the fifth lens element may have positive refractive power, and an image-side surface thereof may be convex; the sixth lens may have negative optical power, and an image side surface thereof may be concave; the seventh lens element may have negative refractive power, wherein the object-side surface thereof may be convex and the image-side surface thereof may be concave. Wherein at least one of the first to seventh lenses may have an aspherical surface that is non-rotationally symmetrical.
In one embodiment, the entrance pupil diameter EPD of the imaging lens and the effective focal length fx of the imaging lens in the X-axis direction can satisfy fx/EPD < 2.4; and the effective focal length fy of the entrance pupil diameter EPD of the imaging lens and the Y-axis direction of the imaging lens can meet the requirement that fy/EPD is less than 2.4.
In one embodiment, the effective focal length fx of the imaging lens in the X-axis direction and the effective focal length fy of the imaging lens in the Y-axis direction may satisfy 0.9 < fx/fy < 1.1.
In one embodiment, the effective focal length f7 of the seventh lens and the radius of curvature R14 in the Y-axis direction of the image side of the seventh lens may satisfy-2.9 < f7/R14 < -2.6.
In one embodiment, the effective focal length fy in the Y-axis direction of the imaging lens, the radius of curvature R13 in the Y-axis direction of the object side surface of the seventh lens, and the radius of curvature R14 in the Y-axis direction of the image side surface of the seventh lens may satisfy 0.6 < fy/(r13+r14) < 0.8.
In one embodiment, the radius of curvature R13 in the Y-axis direction of the object-side surface of the seventh lens and the radius of curvature R14 in the Y-axis direction of the image-side surface of the seventh lens may satisfy 1.8.ltoreq.R13+R14)/(R13-R14) < 2.
In one embodiment, the radius of curvature R14 in the Y-axis direction of the image side of the seventh lens and the radius of curvature R14X in the X-axis direction of the image side of the seventh lens may satisfy 0.8 < R14/R14X < 1.2.
In one embodiment, the effective focal length fy of the imaging lens in the Y-axis direction and the effective focal length f5 of the fifth lens may satisfy 1.5 < fy/f5 < 2.0.
In one embodiment, the effective focal length f5 of the fifth lens and the radius of curvature R10 of the image side surface of the fifth lens in the Y-axis direction may satisfy-2.2 < f5/R10 < -1.8.
In one embodiment, the effective half-caliber DT72 of the image side of the seventh lens and the effective half-caliber DT11 of the object side of the first lens may satisfy 3.1 < DT72/DT11 < 3.8.
In one embodiment, the edge thickness ET6 of the sixth lens and the edge thickness ET5 of the fifth lens may satisfy 1.7 < ET6/ET5 < 2.6.
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 3.1 < CT5/ET5 < 4.2.
In one embodiment, the center thickness CT5 of the fifth lens element on the optical axis and the distance TTL between the object side surface of the first lens element and the imaging surface of the imaging lens element on the optical axis may satisfy 0.1 < CT5/TTL < 0.3.
In one embodiment, a distance TTL between an object side surface of the first lens and an imaging surface of the 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 imaging lens may satisfy TTL/ImgH < 1.5.
In one embodiment, the sum Σct of the center thicknesses of the first lens element to the seventh lens element on the optical axis and the sum Σt of the air spaces of any two adjacent lens elements of the first lens element to the seventh lens element on the optical axis may satisfy 3 < Σct/Σt < 3.6.
On the other hand, the application also provides an imaging lens, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from an object side to an image side along an optical axis. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface; the second lens has positive focal power or negative focal power, and the image side surface of the second lens can be concave; the third lens has positive optical power or negative optical power; the fourth lens element with positive or negative focal power has a convex object-side surface and a concave image-side surface; the fifth lens element may have positive refractive power, and an image-side surface thereof may be convex; the sixth lens may have negative optical power, and an image side surface thereof may be concave; the seventh lens element may have negative refractive power, wherein the object-side surface thereof may be convex and the image-side surface thereof may be concave. The effective focal length fx of the entrance pupil diameter EPD of the imaging lens and the X-axis direction of the imaging lens can meet the condition that fx/EPD is smaller than 2.4; and the effective focal length fy of the entrance pupil diameter EPD of the imaging lens and the Y-axis direction of the imaging lens can meet the requirement that fy/EPD is less than 2.4.
In still another aspect, the present application further provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface; the second lens has positive focal power or negative focal power, and the image side surface of the second lens can be concave; the third lens has positive optical power or negative optical power; the fourth lens element with positive or negative focal power has a convex object-side surface and a concave image-side surface; the fifth lens element may have positive refractive power, and an image-side surface thereof may be convex; the sixth lens may have negative optical power, and an image side surface thereof may be concave; the seventh lens element may have negative refractive power, wherein the object-side surface thereof may be convex and the image-side surface thereof may be concave. The effective focal length fx of the imaging lens in the X-axis direction and the effective focal length fy of the imaging lens in the Y-axis direction can meet 0.9 < fx/fy < 1.1.
In still another aspect, the present application further provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface; the second lens has positive focal power or negative focal power, and the image side surface of the second lens can be concave; the third lens has positive optical power or negative optical power; the fourth lens element with positive or negative focal power has a convex object-side surface and a concave image-side surface; the fifth lens element may have positive refractive power, and an image-side surface thereof may be convex; the sixth lens may have negative optical power, and an image side surface thereof may be concave; the seventh lens element may have negative refractive power, wherein the object-side surface thereof may be convex and the image-side surface thereof may be concave. The radius of curvature R14 in the Y-axis direction of the image side of the seventh lens and the radius of curvature R14X in the X-axis direction of the image side of the seventh lens may satisfy 0.8 < R14/R14X < 1.2.
In still another aspect, the present application further provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface; the second lens has positive focal power or negative focal power, and the image side surface of the second lens can be concave; the third lens has positive optical power or negative optical power; the fourth lens element with positive or negative focal power has a convex object-side surface and a concave image-side surface; the fifth lens element may have positive refractive power, and an image-side surface thereof may be convex; the sixth lens may have negative optical power, and an image side surface thereof may be concave; the seventh lens element may have negative refractive power, wherein the object-side surface thereof may be convex and the image-side surface thereof may be concave. The effective focal length fy of the imaging lens in the Y-axis direction and the effective focal length f5 of the fifth lens can satisfy 1.5 < fy/f5 < 2.0.
In still another aspect, the present application further provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface; the second lens has positive focal power or negative focal power, and the image side surface of the second lens can be concave; the third lens has positive optical power or negative optical power; the fourth lens element with positive or negative focal power has a convex object-side surface and a concave image-side surface; the fifth lens element may have positive refractive power, and an image-side surface thereof may be convex; the sixth lens may have negative optical power, and an image side surface thereof may be concave; the seventh lens element may have negative refractive power, wherein the object-side surface thereof may be convex and the image-side surface thereof may be concave. The effective half-caliber DT72 of the image side surface of the seventh lens and the effective half-caliber DT11 of the object side surface of the first lens can satisfy the conditions of 3.1 < DT72/DT11 < 3.8.
In still another aspect, the present application further provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface; the second lens has positive focal power or negative focal power, and the image side surface of the second lens can be concave; the third lens has positive optical power or negative optical power; the fourth lens element with positive or negative focal power has a convex object-side surface and a concave image-side surface; the fifth lens element may have positive refractive power, and an image-side surface thereof may be convex; the sixth lens may have negative optical power, and an image side surface thereof may be concave; the seventh lens element may have negative refractive power, wherein the object-side surface thereof may be convex and the image-side surface thereof may be concave. The edge thickness ET6 of the sixth lens and the edge thickness ET5 of the fifth lens can satisfy 1.7 < ET6/ET5 < 2.6.
In still another aspect, the present application further provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface; the second lens has positive focal power or negative focal power, and the image side surface of the second lens can be concave; the third lens has positive optical power or negative optical power; the fourth lens element with positive or negative focal power has a convex object-side surface and a concave image-side surface; the fifth lens element may have positive refractive power, and an image-side surface thereof may be convex; the sixth lens may have negative optical power, and an image side surface thereof may be concave; the seventh lens element may have negative refractive power, wherein the object-side surface thereof 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 3.1 < CT5/ET5 < 4.2.
In still another aspect, the present application further provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface; the second lens has positive focal power or negative focal power, and the image side surface of the second lens can be concave; the third lens has positive optical power or negative optical power; the fourth lens element with positive or negative focal power has a convex object-side surface and a concave image-side surface; the fifth lens element may have positive refractive power, and an image-side surface thereof may be convex; the sixth lens may have negative optical power, and an image side surface thereof may be concave; the seventh lens element may have negative refractive power, wherein the object-side surface thereof may be convex and the image-side surface thereof may be concave. The sum of center thicknesses sigma CT of the first lens to the seventh lens on the optical axis and the sum of air intervals sigma T of any two adjacent lenses of the first lens to the seventh lens on the optical axis can meet 3 sigma CT/sigmaT < 3.6.
The imaging lens has at least one beneficial effect of ultra-thin, large aperture, wide angle, high image quality and the like by reasonably distributing the focal power, the surface type, the center thickness of each lens, the axial spacing between each lens and the like of the lenses. In addition, by introducing the non-rotationally symmetrical aspheric surface, the off-axis meridian aberration and the sagittal aberration of the imaging lens are corrected simultaneously, so that the improvement of the image quality is further obtained.
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 imaging lens according to embodiment 1 of the present application;
fig. 2 schematically illustrates a case where the RMS spot diameter of the imaging lens of embodiment 1 is within the first quadrant;
fig. 3 shows a schematic structural view of an imaging lens according to embodiment 2 of the present application;
FIG. 4 schematically illustrates the RMS spot diameter of the imaging lens of example 2 in the first quadrant;
fig. 5 shows a schematic structural view of an imaging lens according to embodiment 3 of the present application;
FIG. 6 schematically illustrates the RMS spot diameter of the imaging lens of example 3 in the first quadrant;
fig. 7 shows a schematic structural diagram of an imaging lens according to embodiment 4 of the present application;
FIG. 8 schematically illustrates the RMS spot diameter of the imaging lens of example 4 in the first quadrant;
fig. 9 shows a schematic structural view of an imaging lens according to embodiment 5 of the present application;
fig. 10 schematically illustrates a case where the RMS spot diameter of the imaging lens of embodiment 5 is in the first quadrant;
fig. 11 shows a schematic structural view of an imaging lens according to embodiment 6 of the present application;
FIG. 12 schematically illustrates the RMS spot diameter of the imaging lens of example 6 in the first quadrant;
fig. 13 shows a schematic structural view of an imaging lens according to embodiment 7 of the present application;
fig. 14 schematically illustrates a case where the RMS spot diameter of the imaging lens of embodiment 7 is in the first quadrant;
fig. 15 shows a schematic structural view of an imaging lens according to embodiment 8 of the present application;
fig. 16 schematically illustrates a case where the RMS spot diameter of the imaging lens of embodiment 8 is in the first quadrant;
fig. 17 shows a schematic structural diagram of an imaging lens according to embodiment 9 of the present application;
fig. 18 schematically shows a case where the RMS spot diameter of the imaging lens of embodiment 9 is in the first quadrant;
fig. 19 shows a schematic structural view of an imaging lens according to embodiment 10 of the present application;
FIG. 20 schematically illustrates the RMS spot diameter of the imaging lens of embodiment 10 within the first quadrant;
fig. 21 shows a schematic structural view of an imaging lens according to embodiment 11 of the present application;
fig. 22 schematically shows a case where the RMS spot diameter of the imaging lens of embodiment 11 is in the first quadrant.
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. In each lens, the surface closest to the subject is referred to as the subject side of the lens; in each lens, the surface closest to the imaging plane is referred to as the image side of the lens.
Herein, we define a direction parallel to the optical axis as a Z-axis direction, a direction perpendicular to the Z-axis and lying in a meridian plane as a Y-axis direction, and a direction perpendicular to the Z-axis and lying in a sagittal plane as an X-axis direction. Unless otherwise specified, each parameter symbol herein except for a parameter symbol related to a field of view represents a characteristic parameter value in the Y-axis direction of the imaging lens. For example, unless otherwise specified, R14 in the conditional expression "R14/R14X" represents a radius of curvature in the Y-axis direction of the image side surface of the seventh lens, and R14X represents a radius of curvature in the X-axis direction of the image side surface of the seventh 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 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, and its object-side surface may be convex; the second lens has positive focal power or negative focal power, and the image side surface of the second lens can be concave; the third lens has positive optical power or negative optical power; the fourth lens element with positive or negative focal power has a convex object-side surface and a concave image-side surface; the fifth lens element may have positive refractive power, and an image-side surface thereof may be convex; the sixth lens may have negative optical power, and an image side surface thereof may be concave; the seventh lens element may have negative refractive power, wherein the object-side surface thereof may be convex and the image-side surface thereof may be concave. The positive and negative distribution of the focal power of each lens of the imaging lens is reasonably configured, so that the low-order aberration of the system can be effectively balanced, and the system can obtain higher imaging quality.
In addition, the image quality may be further improved by setting the object side surface and/or the image side surface of at least one of the first to seventh lenses to be an aspherical surface that is non-rotationally symmetrical. The non-rotationally symmetrical aspheric surface is a free-form surface, and the non-rotationally symmetrical component is added on the basis of the rotationally symmetrical aspheric surface, so that the introduction of the non-rotationally symmetrical aspheric surface in the lens system is beneficial to effectively correcting off-axis meridian aberration and sagittal aberration, and greatly improving the performance of the optical system. Alternatively, the image side surface of the seventh lens may be an aspherical surface that is non-rotationally symmetrical.
In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 0.9 < fx/fy < 1.1, where fx is an effective focal length in an X-axis direction of the imaging lens and fy is an effective focal length in a Y-axis direction of the imaging lens. More specifically, fx and fy may further satisfy 0.97.ltoreq.fx/fy.ltoreq.1.01. The effective focal length of the X, Y axial direction of the imaging lens is reasonably controlled, and the off-axis meridian aberration and the sagittal aberration of the imaging lens can be effectively corrected, so that the imaging quality is effectively improved.
In an exemplary embodiment, the imaging lens of the present application may satisfy a conditional expression fx/EPD < 2.4 and/or satisfy a conditional expression fy/EPD < 2.4, where fx is an effective focal length in an X-axis direction of the imaging lens, fy is an effective focal length in a Y-axis direction of the imaging lens, and EPD is an entrance pupil diameter of the imaging lens. More specifically, fx and EPD may further satisfy 2.0 < fx/EPD < 2.4, e.g., 2.11. Ltoreq.fx/EPD. Ltoreq.2.37, and fy and EPD may further satisfy 2.0 < fy/EPD < 2.4, e.g., 2.09. Ltoreq.fy/EPD. Ltoreq.2.35. The imaging lens has larger relative aperture and stronger light collecting capability by meeting the condition that fx/EPD is smaller than 2.4 and the condition that fy/EPD is smaller than 2.4, so that the imaging lens can realize good imaging quality in a dim environment and is convenient for adapting to the brightness change of the external environment.
In an exemplary embodiment, the imaging lens of the present application may satisfy a condition that TTL/ImgH < 1.5, where TTL is a distance between an object side surface of the first lens and an imaging surface of the 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 imaging lens. More specifically, TTL and ImgH can further satisfy the formula 1.3 < TTL/ImgH < 1.5, e.g., 1.42. Ltoreq.TTL/ImgH. Ltoreq.1.49. The ultra-thin characteristic of the imaging lens is realized by restricting the ratio of TTL to ImgH.
In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 1.8+.R13+R14)/(R13-R14) < 2, where R13 is a radius of curvature of the object side surface of the seventh lens in the Y-axis direction and R14 is a radius of curvature of the image side surface of the seventh lens in the Y-axis direction. More specifically, R13 and R14 further satisfy 1.80.ltoreq.R13+R14)/(R13-R14). Ltoreq.1.96. And the curvature radius of the image side surface of the seventh lens and the curvature radius of the object side surface are reasonably arranged, so that the imaging lens can be better matched with the angle of the principal ray of the chip.
In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 0.8 < R14/R14X < 1.2, where R14 is a radius of curvature of the image side surface of the seventh lens in the Y-axis direction, and R14X is a radius of curvature of the image side surface of the seventh lens in the X-axis direction. More specifically, R14 and R14x may further satisfy 0.86.ltoreq.R14/R14x.ltoreq.1.15. The meridional aberration and the sagittal aberration of the imaging system can be effectively improved by meeting the condition that R14/R14x is smaller than 1.2, and the imaging performance of the system is improved.
In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 0.1 < CT5/TTL < 0.3, where CT5 is a center thickness of the fifth lens element on the optical axis, and TTL is a distance between an object side surface of the first lens element and an imaging surface of the imaging lens element on the optical axis. More specifically, CT5 and TTL can further satisfy 0.17.ltoreq.CT5/TTL.ltoreq.0.24. The center thickness of the fifth lens on the optical axis is reasonably controlled, so that the structural compactness of the optical lens group can be ensured, and meanwhile, the requirements on the processability and manufacturability of the lens are met.
In an exemplary embodiment, the imaging lens of the present application may satisfy the condition that Σct/Σt < 3.6, where Σct is a sum of thicknesses of centers of the first lens element to the seventh lens element on the optical axis, respectively, Σt is a sum of air intervals of any adjacent two lens elements of the first lens element to the seventh lens element on the optical axis. More specifically, sigma CT and Sigma T can further satisfy Sigma CT of 3.04.ltoreq.Sigma CT/. Ltoreq.3.53. The ratio of Sigma CT to Sigma T is reasonably controlled, which is beneficial to ensuring the miniaturization of the lens.
In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 1.5 < fy/f5 < 2.0, where fy is an effective focal length of the imaging lens in the Y-axis direction, and f5 is an effective focal length of the fifth lens. More specifically, f and f5 may further satisfy 1.59. Ltoreq.fy/f5. Ltoreq.1.95. The effective focal length of the fifth lens is reasonably controlled, so that the deflection angle of light rays can be reduced, and the sensitivity of the imaging lens is reduced.
In an exemplary embodiment, the imaging lens of the present application may satisfy the condition of-2.2 < f5/R10 < -1.8, where f5 is an effective focal length of the fifth lens, and R10 is a radius of curvature of an image side surface of the fifth lens in a Y-axis direction. More specifically, f5 and R10 may further satisfy-2.14.ltoreq.f5/R10.ltoreq.1.81. The curvature radius of the image side surface of the fifth lens is reasonably set, so that the imaging lens has good astigmatic balance capability.
In an exemplary embodiment, the imaging lens of the present application may satisfy the condition of-2.9 < f7/R14 < -2.6, where f7 is an effective focal length of the seventh lens and R14 is a radius of curvature of an image side surface of the seventh lens in a Y-axis direction. More specifically, f7 and R14 may further satisfy-2.85.ltoreq.f7/R14.ltoreq.2.67. The curvature radius of the image side surface of the seventh lens is reasonably set, which is favorable for correcting coma or curvature of field and can inhibit the increase of astigmatism.
In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 3.1 < DT72/DT11 < 3.8, where DT72 is an effective half-caliber of an image side surface of the seventh lens element and DT11 is an effective half-caliber of an object side surface of the first lens element. More specifically, DT72 and DT11 may further satisfy 3.11+.DT 72/DT 11+.3.78. The height change of the marginal view field light rays in the imaging lens can be reasonably controlled by meeting the condition that the DT72/DT11 is smaller than 3.8, and the sensitivity of the marginal view field is reduced.
In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 1.7 < ET6/ET5 < 2.6, where ET6 is an edge thickness of the sixth lens and ET5 is an edge thickness of the fifth lens. More specifically, ET6 and ET5 may further satisfy 1.72.ltoreq.ET 6/ET 5.ltoreq.2.54. The distortion of the edge view field of the imaging system can be effectively regulated and controlled by satisfying the condition formula 1.7 < ET6/ET5 < 2.6, so that the distortion of the edge view field is controlled within a reasonable range.
In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 3.1 < CT5/ET5 < 4.2, 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, CT5 and ET5 may further satisfy CT5/ET 5.ltoreq.4.15.ltoreq.3.15. The thickness ratio of the fifth lens is reasonably configured, so that the requirements of the lens on the processability and the manufacturability can be met.
In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 0.6 < fy/(r13+r14) < 0.8, where fy is an effective focal length in the Y-axis direction of the imaging lens, R13 is a radius of curvature in the Y-axis direction of the object-side surface of the seventh lens, and R14 is a radius of curvature in the Y-axis direction of the image-side surface of the seventh lens. More specifically, f, R13 and R14 may further satisfy 0.67.ltoreq.fy/(R13+R14). Ltoreq.0.79. The astigmatism contribution of the seventh lens can be reasonably controlled by satisfying the conditional expression of 0.6 < fy/(R13+R14) < 0.8, and the imaging quality of the lens is improved.
In an exemplary embodiment, the imaging lens may further include a diaphragm to improve the imaging quality of the lens. Alternatively, a diaphragm may be provided between the object side and the first lens.
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 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 imaging lens is more beneficial to production and processing and is applicable to portable electronic products. In addition, by introducing an aspherical surface which is not rotationally symmetrical, the off-axis meridian aberration and the sagittal aberration of the imaging lens are corrected, and further image quality improvement can be obtained.
In the embodiments of the present application, aspherical mirror surfaces are often used as the mirror surfaces of the respective lenses. 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, at least one of an object side surface and an image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens may be aspherical. Alternatively, each of the first, second, third, fourth, fifth, sixth, and seventh lenses may be aspherical in object side and image side.
However, it will be appreciated by those skilled in the art that the number of lenses making up the imaging lens can be varied to achieve the various results and advantages described in this specification without departing from the technical solutions claimed herein. For example, although seven lenses are described as an example in the embodiment, the imaging lens is not limited to include seven lenses. The imaging lens may also include other numbers of lenses, if desired.
Specific examples of the imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.
Example 1
An imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 and 2. Fig. 1 shows a schematic configuration diagram of an imaging lens according to embodiment 1 of the present application.
As shown in fig. 1, an 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 negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has 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 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 1 shows the surface types, the radius of curvature X, the radius of curvature Y, the thickness, the material, the conic coefficient X, and the conic coefficient Y of each lens of the imaging lens of embodiment 1, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
TABLE 1
It should be understood that the "radius of curvature X" and "conic coefficient X" not specifically indicated (blank) in the above table remain consistent with the corresponding values of "radius of curvature Y" and "conic coefficient Y". The following examples are similar.
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, the second lens element E2, the third lens element E3, the fourth lens element E4, the fifth lens element E5 and the sixth lens element E6 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-S12 in example 1 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 And A 20 。
TABLE 2
As can be further seen from table 1, the object-side surface S13 and the image-side surface S14 of the seventh lens element E7 are non-rotationally symmetric aspheric surfaces (i.e., AAS surfaces), and the surface shape of the non-rotationally symmetric aspheric surfaces can be defined by, but not limited to, the following non-rotationally symmetric aspheric surface formula:
wherein Z is the sagittal height of the plane parallel to the Z-axis direction; cx and Cy are the curvatures (=1/radius of curvature) of the vertices of the X, Y-direction surface, respectively; kx and Ky are X, Y directional cone coefficients respectively; AR, BR, CR, DR, ER, FR, GR, HR, JR are the 4 th, 6 th, 8 th, 10 th, 12 th, 14 th, 16 th, 18 th, 20 th coefficients in the aspheric rotationally symmetric component, respectively; AP, BP, CP, DP, EP, FP, GP, HP, JP are the 4 th, 6 th, 8 th, 10 th, 12 th, 14 th, 16 th, 18 th, 20 th coefficients, respectively, of the aspheric non-rotationally symmetric component. Table 3 below gives the AR, BR, CR, DR, ER, FR, GR, HR, JR coefficients and AP, BP, CP, DP, EP, FP, GP, HP, JP coefficients of the non-rotationally symmetrical aspherical surfaces S13 and S14 that can be used in example 1.
TABLE 3 Table 3
Table 4 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 1, the effective focal length fx in the X-axis direction of the imaging lens, the effective focal length fy in the Y-axis direction of the imaging lens, the total optical length TTL of the imaging lens (i.e., the distance on the optical axis from the object side surface S1 to the imaging surface S17 of the first lens E1), half of the diagonal length ImgH of the effective pixel area on the imaging surface S17, the maximum half field angle HFOV, and the entrance pupil diameter EPD of the imaging lens.
f1(mm) 4.08 fx(mm) 3.03
f2(mm) -7.57 fy(mm) 3.01
f3(mm) 11.96 TTL(mm) 4.29
f4(mm) -18.04 ImgH(mm) 2.93
f5(mm) 1.65 HFOV(°) 45.0
f6(mm) -4.84 EPD(mm) 1.32
f7(mm) -2.66
TABLE 4 Table 4
The imaging lens in embodiment 1 satisfies:
fx/EPD = 2.29, where fx is the effective focal length of the imaging lens in the X-axis direction and EPD is the entrance pupil diameter of the imaging lens;
fy/EPD = 2.28, where fy is the effective focal length of the imaging lens in the Y-axis direction and EPD is the entrance pupil diameter of the imaging lens;
TTL/imgh=1.46, where TTL is the distance between the object side surface S1 of the first lens E1 and the imaging surface S17 of the imaging lens on the optical axis, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface S17 of the imaging lens;
(r13+r14)/(R13-R14) =1.93, wherein R13 is a radius of curvature of the object-side surface S13 of the seventh lens element E7 in the Y-axis direction, and R14 is a radius of curvature of the image-side surface S14 of the seventh lens element E7 in the Y-axis direction;
r14/r14x=1.06, wherein R14 is a radius of curvature of the image side surface S14 of the seventh lens E7 in the Y-axis direction, and R14X is a radius of curvature of the image side surface S14 of the seventh lens E7 in the X-axis direction;
CT 5/ttl=0.19, where 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 S17 of the imaging lens element on the optical axis;
Σct/Σt=3.15, wherein Σct is the sum of the thicknesses of the centers of the first lens element E1 to the seventh lens element E7 on the optical axis, respectively, Σt is the sum of the air spaces of any two adjacent lens elements of the first lens element E1 to the seventh lens element E7 on the optical axis;
fy/f5=1.83, where fy is the effective focal length of the imaging lens in the Y-axis direction, and f5 is the effective focal length of the fifth lens E5;
f5/r10= -1.99, where f5 is the effective focal length of the fifth lens E5, and R10 is the radius of curvature of the image side surface S10 of the fifth lens E5 in the Y-axis direction;
f7/r14= -2.82, where f7 is the effective focal length of the seventh lens E7, and R14 is the radius of curvature of the image side surface S14 of the seventh lens E7 in the Y-axis direction;
DT72/DT11 = 3.57, wherein DT72 is the effective half-aperture of the image side surface S14 of the seventh lens element E7, and DT11 is the effective half-aperture of the object side surface S1 of the first lens element E1;
ET 6/et5=1.88, where ET6 is the edge thickness of the sixth lens E6 and ET5 is the edge thickness of the fifth lens E5;
CT 5/et5=3.31, where ET5 is the edge thickness of the fifth lens E5, and CT5 is the center thickness of the fifth lens E5 on the optical axis;
fy/(r13+r14) =0.77, where fy is the effective focal length in the Y-axis direction of the imaging lens, R13 is the radius of curvature in the Y-axis direction of the object-side surface S13 of the seventh lens E7, and R14 is the radius of curvature in the Y-axis direction of the image-side surface S14 of the seventh lens E7;
fx/fy=1.01, where fx is an effective focal length in the X-axis direction of the imaging lens, and fy is an effective focal length in the Y-axis direction of the imaging lens.
Fig. 2 shows the magnitude of RMS spot diameters of the imaging lens of example 1 at different image height positions within the first quadrant. As can be seen from fig. 2, the imaging lens provided in embodiment 1 can achieve good imaging quality.
Example 2
An imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3 and 4. 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 imaging lens according to embodiment 2 of the present application.
As shown in fig. 3, the 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: 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 concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is 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 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 5 shows the surface type, radius of curvature X, radius of curvature Y, thickness, material, conic coefficient X, and conic coefficient Y of each lens of the imaging lens of embodiment 2, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
TABLE 5
As can be seen from table 5, in example 2, the object side surface and the image side surface of any one of the first lens element E1, the second lens element E2, the third lens element E3, the fourth lens element E4, the fifth lens element E5 and the sixth lens element E6 are aspheric; the object side surface S13 and the image side surface S14 of the seventh lens E7 are aspherical surfaces that are non-rotationally symmetrical.
Table 6 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 7 shows rotationally symmetric components and higher-order coefficients of the rotationally symmetric components that can be used for the rotationally asymmetric aspherical surfaces S13 and S14 in embodiment 2, wherein the rotationally asymmetric aspherical surface profile can be defined by the formula (2) given in embodiment 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -7.79E-03 -1.18E-03 -1.84E-04 -1.80E-05 -9.11E-06 2.11E-06 -2.44E-06 0.00E+00 0.00E+00
S2 -6.66E-02 -6.64E-03 -3.97E-04 -5.76E-05 -1.83E-05 -5.87E-06 -1.94E-06 0.00E+00 0.00E+00
S3 -6.60E-02 -9.24E-03 -6.61E-05 -2.96E-06 -2.21E-05 -1.83E-05 -2.15E-06 0.00E+00 0.00E+00
S4 -5.38E-02 -1.09E-02 3.73E-04 -1.22E-04 4.57E-05 -2.86E-05 5.85E-06 0.00E+00 0.00E+00
S5 -9.80E-02 -1.02E-02 2.93E-03 6.72E-04 2.64E-04 -3.87E-05 -2.94E-05 0.00E+00 0.00E+00
S6 -6.57E-02 -5.11E-03 2.93E-03 9.39E-04 3.06E-04 -1.78E-05 -7.50E-06 0.00E+00 0.00E+00
S7 -9.03E-02 -3.06E-03 1.50E-03 -1.57E-03 2.95E-04 -2.39E-04 4.07E-05 0.00E+00 0.00E+00
S8 -1.11E-01 3.89E-04 1.11E-05 -4.52E-03 -1.93E-04 -3.60E-05 3.13E-05 0.00E+00 0.00E+00
S9 8.88E-02 -5.37E-03 -9.69E-04 -1.79E-03 -1.18E-03 4.90E-04 -2.79E-04 0.00E+00 0.00E+00
S10 -2.07E-02 6.25E-02 1.22E-03 -9.84E-03 -1.09E-03 5.95E-04 1.07E-03 0.00E+00 0.00E+00
S11 -5.89E-01 -6.52E-02 4.70E-02 -1.40E-02 8.43E-03 -2.65E-03 -1.23E-03 -1.64E-03 -1.05E-03
S12 -5.85E-01 -1.74E-03 9.42E-02 -5.05E-02 2.79E-02 -1.91E-02 2.45E-03 -2.70E-03 2.62E-03
TABLE 6
TABLE 7
Table 8 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 2, the effective focal length fx in the X-axis direction of the imaging lens, the effective focal length fy in the Y-axis direction of the imaging lens, the total optical length TTL of the imaging lens, half of the diagonal length ImgH of the effective pixel area on the imaging surface S17, the maximum half field angle HFOV, and the entrance pupil diameter EPD of the imaging lens.
f1(mm) 4.59 fx(mm) 3.05
f2(mm) 133.67 fy(mm) 3.02
f3(mm) -10.66 TTL(mm) 4.29
f4(mm) 52.20 ImgH(mm) 2.93
f5(mm) 1.54 HFOV(°) 44.7
f6(mm) -3.88 EPD(mm) 1.32
f7(mm) -2.67
TABLE 8
Fig. 4 shows the RMS spot diameter of the imaging lens of example 2 at different image height positions in the first quadrant. As can be seen from fig. 4, the imaging lens provided in embodiment 2 can achieve good imaging quality.
Example 3
An imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5 and 6. Fig. 5 shows a schematic structural diagram of an imaging lens according to embodiment 3 of the present application.
As shown in fig. 5, an 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 convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is 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 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 9 shows the surface types, the radius of curvature X, the radius of curvature Y, the thickness, the material, the conic coefficient X, and the conic coefficient Y of each lens of the imaging lens of embodiment 3, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
TABLE 9
As can be seen from table 9, in example 3, the object side surface and the image side surface of any one of the first lens element E1, the second lens element E2, the third lens element E3, the fourth lens element E4, and the sixth lens element E6, the object side surface S9 of the fifth lens element E5, and the object side surface S13 of the seventh lens element E7 are aspheric; the image side surface S10 of the fifth lens element E5 and the image side surface S14 of the seventh lens element E7 are aspheric with respect to non-rotational symmetry.
Table 10 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 11 shows rotationally symmetric components and higher-order coefficients of the rotationally symmetric components that can be used for the rotationally asymmetric aspherical surfaces S10 and S14 in embodiment 3, wherein the rotationally asymmetric aspherical surface profile can be defined by the formula (2) given in embodiment 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -6.99E-03 -9.41E-04 -1.69E-04 -2.19E-05 -1.26E-05 -7.11E-07 -4.90E-06 0.00E+00 0.00E+00
S2 -5.81E-02 -7.42E-03 -7.40E-04 -5.84E-05 -2.38E-05 2.51E-06 -5.87E-06 0.00E+00 0.00E+00
S3 -5.96E-02 -9.28E-03 -9.98E-04 2.72E-05 8.94E-06 2.71E-05 7.62E-06 0.00E+00 0.00E+00
S4 -3.75E-02 -1.07E-02 -2.05E-04 4.30E-04 9.16E-05 3.76E-05 7.62E-06 0.00E+00 0.00E+00
S5 -9.84E-02 -6.30E-03 1.72E-03 1.42E-03 1.62E-04 1.28E-06 -3.32E-05 0.00E+00 0.00E+00
S6 -6.50E-02 -3.78E-03 2.22E-03 9.83E-04 2.13E-05 1.66E-05 1.29E-05 0.00E+00 0.00E+00
S7 -8.22E-02 -2.58E-03 3.05E-03 -1.26E-03 4.73E-04 -1.03E-04 1.04E-04 0.00E+00 0.00E+00
S8 -1.13E-01 -7.03E-04 5.29E-03 -9.60E-04 7.15E-04 -1.13E-05 1.29E-04 0.00E+00 0.00E+00
S9 6.96E-02 -6.11E-03 2.97E-04 -9.52E-04 -5.51E-04 1.44E-04 -3.41E-05 0.00E+00 0.00E+00
S11 -4.92E-01 -6.78E-02 3.71E-02 -6.34E-03 6.52E-03 7.24E-04 7.20E-04 -1.95E-04 -3.43E-04
S12 -4.59E-01 -3.05E-02 6.15E-02 -3.43E-02 1.67E-02 -4.13E-03 2.09E-03 -1.50E-03 3.14E-04
S13 -1.50E+00 2.91E-01 -8.88E-02 1.25E-02 2.98E-03 -3.48E-03 -5.73E-04 1.04E-03 -3.02E-04
Table 10
TABLE 11
Table 12 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 3, an effective focal length fx in the X-axis direction of the imaging lens, an effective focal length fy in the Y-axis direction of the imaging lens, an optical total length TTL of the imaging lens, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, a maximum half field angle HFOV, and an entrance pupil diameter EPD of the imaging lens.
Table 12
Fig. 6 shows the magnitude of RMS spot diameters of the imaging lens of example 3 at different image height positions within the first quadrant. As can be seen from fig. 6, the imaging lens provided in embodiment 3 can achieve good imaging quality.
Example 4
An imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 and 8. Fig. 7 shows a schematic structural diagram of an imaging lens according to embodiment 4 of the present application.
As shown in fig. 7, an 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 convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is concave, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is 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 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 radius of curvature X, the radius of curvature Y, the thickness, the material, the conic coefficient X, and the conic coefficient Y of each lens of the imaging lens of embodiment 4, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
TABLE 13
As can be seen from table 13, in example 4, the object side surface and the image side surface of any one of the first lens element E1, the second lens element E2, the third lens element E3, the fourth lens element E4, and the sixth lens element E6, the object side surface S9 of the fifth lens element E5, and the object side surface S13 of the seventh lens element E7 are aspheric; the image side surface S10 of the fifth lens element E5 and the image side surface S14 of the seventh lens element E7 are aspheric with respect to non-rotational symmetry.
Table 14 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 15 shows rotationally symmetric components and higher-order coefficients of the rotationally symmetric components that can be used for the non-rotationally symmetric aspherical surfaces S10 and S14 in embodiment 4, wherein the non-rotationally symmetric aspherical surface profile can be defined by the formula (2) given in embodiment 1 above.
TABLE 14
TABLE 15
Table 16 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 4, an effective focal length fx in the X-axis direction of the imaging lens, an effective focal length fy in the Y-axis direction of the imaging lens, an optical total length TTL of the imaging lens, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, a maximum half field angle HFOV, and an entrance pupil diameter EPD of the imaging lens.
f1(mm) 3.61 fx(mm) 2.97
f2(mm) -6.26 fy(mm) 3.00
f3(mm) 34.39 TTL(mm) 4.30
f4(mm) 32.19 ImgH(mm) 2.93
f5(mm) 1.69 HFOV(°) 45.5
f6(mm) -4.72 EPD(mm) 1.32
f7(mm) -2.51
Table 16
Fig. 8 shows the magnitude of RMS spot diameters of the imaging lens of example 4 at different image height positions within the first quadrant. As can be seen from fig. 8, the imaging lens provided in embodiment 4 can achieve good imaging quality.
Example 5
An imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 and 10. Fig. 9 shows a schematic structural diagram of an imaging lens according to embodiment 5 of the present application.
As shown in fig. 9, an 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 convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is concave, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is 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 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 17 shows the surface type, radius of curvature X, radius of curvature Y, thickness, material, conic coefficient X, and conic coefficient Y of each lens of the imaging lens of example 5, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
TABLE 17
As can be seen from table 17, in example 5, the object side surface and the image side surface of any one of the first lens element E1, the second lens element E2, the third lens element E3, the fourth lens element E4, and the sixth lens element E6, the object side surface S9 of the fifth lens element E5, and the object side surface S13 of the seventh lens element E7 are aspheric; the image side surface S10 of the fifth lens element E5 and the image side surface S14 of the seventh lens element E7 are aspheric with respect to non-rotational symmetry.
Table 18 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. Table 19 shows rotationally symmetric components and higher-order coefficients of the rotationally symmetric components that can be used for the rotationally asymmetric aspherical surfaces S10 and S14 in embodiment 5, wherein the rotationally asymmetric aspherical surface profile can be defined by the formula (2) given in embodiment 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -6.97E-03 -9.37E-04 -1.65E-04 -2.24E-05 -1.20E-05 -4.77E-07 -4.55E-06 0.00E+00 0.00E+00
S2 -5.75E-02 -7.48E-03 -7.88E-04 -5.63E-05 -2.26E-05 7.33E-06 -4.84E-06 0.00E+00 0.00E+00
S3 -5.93E-02 -9.36E-03 -1.09E-03 2.70E-05 1.30E-05 3.56E-05 1.22E-05 0.00E+00 0.00E+00
S4 -3.77E-02 -1.07E-02 -2.30E-04 4.30E-04 9.25E-05 4.03E-05 1.07E-05 0.00E+00 0.00E+00
S5 -9.82E-02 -6.42E-03 1.76E-03 1.40E-03 1.71E-04 -3.33E-06 -3.00E-05 0.00E+00 0.00E+00
S6 -6.50E-02 -3.79E-03 2.21E-03 1.03E-03 4.88E-06 1.67E-05 1.03E-05 0.00E+00 0.00E+00
S7 -8.25E-02 -2.55E-03 3.02E-03 -1.29E-03 4.63E-04 -1.12E-04 9.90E-05 0.00E+00 0.00E+00
S8 -1.14E-01 -1.19E-03 5.37E-03 -9.95E-04 7.30E-04 -2.92E-05 1.24E-04 0.00E+00 0.00E+00
S9 6.82E-02 -6.25E-03 2.89E-04 -9.40E-04 -5.65E-04 1.38E-04 -3.65E-05 0.00E+00 0.00E+00
S11 -4.91E-01 -7.10E-02 3.80E-02 -6.90E-03 6.84E-03 4.75E-04 7.59E-04 -2.20E-04 -3.12E-04
S12 -4.66E-01 -2.90E-02 6.11E-02 -3.41E-02 1.67E-02 -4.16E-03 2.10E-03 -1.50E-03 3.14E-04
S13 -1.49E+00 2.90E-01 -8.90E-02 1.27E-02 3.00E-03 -3.48E-03 -5.77E-04 1.04E-03 -3.02E-04
TABLE 18
TABLE 19
Table 20 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 5, an effective focal length fx in the X-axis direction of the imaging lens, an effective focal length fy in the Y-axis direction of the imaging lens, an optical total length TTL of the imaging lens, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, a maximum half field angle HFOV, and an entrance pupil diameter EPD of the imaging lens.
f1(mm) 3.60 fx(mm) 2.95
f2(mm) -6.18 fy(mm) 3.00
f3(mm) 32.72 TTL(mm) 4.28
f4(mm) 25.56 ImgH(mm) 2.93
f5(mm) 1.65 HFOV(°) 45.5
f6(mm) -4.50 EPD(mm) 1.32
f7(mm) -2.35
Table 20
Fig. 10 shows the magnitude of RMS spot diameters of the imaging lens of example 5 at different image height positions within the first quadrant. As can be seen from fig. 10, the imaging lens provided in embodiment 5 can achieve good imaging quality.
Example 6
An imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 and 12.
Fig. 11 shows a schematic structural diagram of an imaging lens according to embodiment 6 of the present application.
As shown in fig. 11, an 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 negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has 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 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 21 shows the surface type, radius of curvature X, radius of curvature Y, thickness, material, conic coefficient X, and conic coefficient Y of each lens of the imaging lens of example 6, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
Table 21
As can be seen from table 21, in example 6, the object side surface and the image side surface of any one of the first lens element E1, the second lens element E2, the third lens element E3, the fourth lens element E4, the fifth lens element E5 and the sixth lens element E6, and the object side surface S13 of the seventh lens element E7 are aspheric; the image side surface S14 of the seventh lens E7 is an aspherical surface that is non-rotationally symmetrical.
Table 22 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. Table 23 shows rotationally symmetric components and higher-order coefficients of the rotationally symmetric components that can be used for the rotationally asymmetric aspherical surface S14 in embodiment 6, wherein the rotationally asymmetric aspherical surface profile can be defined by the formula (2) given in embodiment 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -7.81E-03 -1.28E-03 -1.81E-04 -3.41E-05 -3.27E-06 -1.75E-06 4.45E-07 0.00E+00 0.00E+00
S2 -6.04E-02 -7.50E-03 -2.15E-04 5.99E-05 -1.06E-05 -4.64E-06 1.51E-07 0.00E+00 0.00E+00
S3 -5.96E-02 -8.91E-03 1.98E-04 3.58E-04 2.71E-05 -5.63E-06 -3.55E-06 0.00E+00 0.00E+00
S4 -3.82E-02 -1.10E-02 -2.27E-04 3.56E-04 1.36E-05 7.71E-06 -7.99E-06 0.00E+00 0.00E+00
S5 -1.02E-01 -6.32E-03 1.07E-03 9.43E-04 2.67E-05 2.06E-05 -2.94E-05 0.00E+00 0.00E+00
S6 -6.52E-02 -3.68E-03 2.28E-03 4.52E-04 -8.54E-05 1.64E-05 1.25E-05 0.00E+00 0.00E+00
S7 -8.72E-02 -4.37E-03 2.34E-03 -1.28E-03 4.62E-04 -1.01E-04 7.55E-05 0.00E+00 0.00E+00
S8 -1.02E-01 9.88E-05 5.06E-03 -1.18E-03 7.74E-04 -5.12E-05 7.21E-05 0.00E+00 0.00E+00
S9 7.43E-02 -6.73E-03 6.35E-04 -2.31E-04 -6.55E-04 1.70E-04 -5.92E-05 0.00E+00 0.00E+00
S10 -2.44E-02 5.07E-02 7.01E-04 -4.54E-03 -9.90E-04 -2.98E-04 4.10E-04 0.00E+00 0.00E+00
S11 -4.68E-01 -8.54E-02 3.54E-02 -1.48E-02 7.33E-03 -8.87E-04 1.46E-03 -6.84E-05 -1.70E-04
S12 -6.05E-01 -4.91E-03 6.12E-02 -3.71E-02 2.20E-02 -7.43E-03 2.41E-03 -2.26E-03 8.32E-04
S13 -1.30E+00 2.47E-01 -5.93E-02 4.45E-03 4.87E-03 -1.56E-03 -9.91E-04 6.11E-04 -9.16E-05
Table 22
Table 23
Table 24 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 6, an effective focal length fx in the X-axis direction of the imaging lens, an effective focal length fy in the Y-axis direction of the imaging lens, an optical total length TTL of the imaging lens, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, a maximum half field angle HFOV, and an entrance pupil diameter EPD of the imaging lens.
f1(mm) 3.95 fx(mm) 2.93
f2(mm) -7.50 fy(mm) 3.01
f3(mm) 15.73 TTL(mm) 4.25
f4(mm) -51.30 ImgH(mm) 2.93
f5(mm) 1.56 HFOV(°) 44.6
f6(mm) -3.92 EPD(mm) 1.32
f7(mm) -2.50
Table 24
Fig. 12 shows the magnitude of RMS spot diameters of the imaging lens of example 6 at different image height positions within the first quadrant. As can be seen from fig. 12, the imaging lens provided in embodiment 6 can achieve good imaging quality.
Example 7
An imaging lens according to embodiment 7 of the present application is described below with reference to fig. 13 and 14.
Fig. 13 shows a schematic structural diagram of an imaging lens according to embodiment 7 of the present application.
As shown in fig. 13, an 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 convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is concave, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has 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 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 25 shows the surface types, the radius of curvature X, the radius of curvature Y, the thickness, the material, the conic coefficient X, and the conic coefficient Y of each lens of the imaging lens of example 7, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
Table 25
As can be seen from table 25, in example 7, the object side surface and the image side surface of any one of the first lens element E1, the second lens element E2, the third lens element E3, the fourth lens element E4, the fifth lens element E5 and the sixth lens element E6, and the object side surface S13 of the seventh lens element E7 are aspheric; the image side surface S14 of the seventh lens E7 is an aspherical surface that is non-rotationally symmetrical.
Table 26 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 7, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 27 shows rotationally symmetric components and higher-order coefficients of the rotationally symmetric components that can be used for the rotationally asymmetric aspherical surface S14 in embodiment 7, wherein the rotationally asymmetric aspherical surface profile can be defined by the formula (2) given in embodiment 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -9.65E-03 -1.58E-03 -2.32E-04 -4.12E-05 -5.38E-06 -1.66E-06 7.43E-07 0.00E+00 0.00E+00
S2 -6.34E-02 -7.58E-03 -3.31E-04 1.38E-05 -3.42E-05 -9.34E-06 -2.15E-06 0.00E+00 0.00E+00
S3 -5.85E-02 -8.41E-03 1.29E-04 3.00E-04 -3.17E-05 -1.12E-05 -8.62E-06 0.00E+00 0.00E+00
S4 -4.15E-02 -1.13E-02 -4.91E-04 3.05E-04 -7.61E-06 1.02E-05 -7.43E-06 0.00E+00 0.00E+00
S5 -1.02E-01 -6.56E-03 9.46E-04 9.73E-04 2.99E-05 1.51E-05 -2.65E-05 0.00E+00 0.00E+00
S6 -6.68E-02 -3.20E-03 2.43E-03 2.99E-04 -1.02E-04 -7.44E-06 1.52E-05 0.00E+00 0.00E+00
S7 -8.91E-02 -5.34E-03 2.22E-03 -1.48E-03 4.06E-04 -3.60E-05 8.63E-05 0.00E+00 0.00E+00
S8 -1.05E-01 5.41E-05 5.53E-03 -6.43E-04 7.74E-04 6.26E-05 9.98E-05 0.00E+00 0.00E+00
S9 8.59E-02 -6.29E-03 2.28E-03 3.42E-04 -7.11E-04 1.65E-04 -1.11E-05 0.00E+00 0.00E+00
S10 -4.04E-03 5.01E-02 9.90E-04 -3.15E-03 -7.27E-04 -3.39E-04 3.90E-04 0.00E+00 0.00E+00
S11 -4.72E-01 -1.11E-01 2.86E-02 -1.53E-02 6.56E-03 6.66E-05 1.83E-03 4.62E-04 5.61E-05
S12 -6.04E-01 -1.08E-02 5.98E-02 -3.61E-02 2.25E-02 -7.86E-03 2.10E-03 -1.93E-03 8.08E-04
S13 -1.31E+00 2.47E-01 -5.94E-02 4.58E-03 4.89E-03 -1.56E-03 -9.94E-04 6.10E-04 -9.20E-05
Table 26
Table 27
Table 28 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 7, the effective focal length fx in the X-axis direction of the imaging lens, the effective focal length fy in the Y-axis direction of the imaging lens, the total optical length TTL of the imaging lens, half of the diagonal length ImgH of the effective pixel area on the imaging surface S17, the maximum half field angle HFOV, and the entrance pupil diameter EPD of the imaging lens.
f1(mm) 3.60 fx(mm) 2.89
f2(mm) -6.53 fy(mm) 2.87
f3(mm) 13.12 TTL(mm) 4.16
f4(mm) -39.10 ImgH(mm) 2.93
f5(mm) 1.65 HFOV(°) 45.9
f6(mm) -4.13 EPD(mm) 1.22
f7(mm) -2.72
Table 28
Fig. 14 shows the magnitude of RMS spot diameters of the imaging lens of example 7 at different image height positions within the first quadrant. As can be seen from fig. 14, the imaging lens provided in embodiment 7 can achieve good imaging quality.
Example 8
An imaging lens according to embodiment 8 of the present application is described below with reference to fig. 15 and 16.
Fig. 15 shows a schematic structural diagram of an imaging lens according to embodiment 8 of the present application.
As shown in fig. 15, an 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 negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has 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 convex, 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 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 29 shows the surface types, the radius of curvature X, the radius of curvature Y, the thickness, the material, the conic coefficient X, and the conic coefficient Y of each lens of the imaging lens of embodiment 8, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
Table 29
As can be seen from table 29, in example 8, the object side surface and the image side surface of any one of the first lens element E1, the second lens element E2, the third lens element E3, the fourth lens element E4, the fifth lens element E5 and the sixth lens element E6, and the object side surface S13 of the seventh lens element E7 are aspheric; the image side surface S14 of the seventh lens E7 is an aspherical surface that is non-rotationally symmetrical.
Table 30 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 31 shows rotationally symmetric components and higher-order coefficients of the rotationally symmetric components that can be used for the rotationally asymmetric aspherical surface S14 in embodiment 8, wherein the rotationally asymmetric aspherical surface profile can be defined by the formula (2) given in embodiment 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -5.41E-03 -7.08E-04 -1.38E-04 -1.75E-05 -9.37E-06 1.11E-06 -3.03E-06 0.00E+00 0.00E+00
S2 -4.57E-02 -5.56E-03 -9.06E-04 -1.03E-04 -3.95E-05 1.36E-06 -2.10E-06 0.00E+00 0.00E+00
S3 -6.50E-02 -7.17E-03 -1.59E-03 -1.63E-04 -8.45E-05 -9.46E-06 3.24E-06 0.00E+00 0.00E+00
S4 -4.37E-02 -1.17E-02 2.84E-05 2.19E-04 9.07E-05 7.60E-07 1.61E-05 0.00E+00 0.00E+00
S5 -1.07E-01 -7.57E-03 2.46E-03 1.62E-03 3.07E-04 -2.29E-05 -4.59E-05 0.00E+00 0.00E+00
S6 -7.39E-02 -2.32E-03 4.35E-03 1.13E-03 2.89E-04 5.06E-05 4.73E-05 0.00E+00 0.00E+00
S7 -9.86E-02 -3.82E-03 2.86E-03 -1.38E-03 7.04E-04 -4.49E-05 1.91E-04 0.00E+00 0.00E+00
S8 -1.40E-01 -6.94E-03 2.60E-03 -1.54E-03 6.39E-04 -7.46E-05 1.19E-04 0.00E+00 0.00E+00
S9 9.64E-02 -4.76E-03 -5.67E-04 -3.63E-03 -6.75E-04 -8.28E-05 -1.54E-04 0.00E+00 0.00E+00
S10 1.74E-02 7.28E-02 -6.29E-03 -1.01E-02 -2.66E-03 7.11E-04 8.54E-04 0.00E+00 0.00E+00
S11 2.20E-01 -7.48E-01 8.11E-01 -3.46E-01 -2.38E-01 4.02E-01 -2.24E-01 5.82E-02 -5.93E-03
S12 -6.57E-01 3.14E-02 6.85E-02 -2.75E-02 2.07E-02 -8.15E-03 -1.92E-04 -1.73E-03 9.93E-04
S13 -1.78E+00 3.72E-01 -1.27E-01 1.97E-02 -3.43E-03 -7.29E-03 1.67E-03 1.43E-03 -1.21E-03
Table 30
Table 31
Table 32 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 8, an effective focal length fx in the X-axis direction of the imaging lens, an effective focal length fy in the Y-axis direction of the imaging lens, an optical total length TTL of the imaging lens, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, a maximum half field angle HFOV, and an entrance pupil diameter EPD of the imaging lens.
Table 32
Fig. 16 shows the magnitude of RMS spot diameters of the imaging lens of example 8 at different image height positions within the first quadrant. As can be seen from fig. 16, the imaging lens provided in embodiment 8 can achieve good imaging quality.
Example 9
An imaging lens according to embodiment 9 of the present application is described below with reference to fig. 17 and 18.
Fig. 17 shows a schematic structural diagram of an imaging lens according to embodiment 9 of the present application.
As shown in fig. 17, an 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 negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is 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 positive refractive power, wherein an object-side surface S9 thereof is convex, 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 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 33 shows the surface type, radius of curvature Y, thickness, material, conic coefficient X, and conic coefficient Y of each lens of the imaging lens of example 9, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
Table 33
As can be seen from table 33, in example 9, the object side surface and the image side surface of any one of the first lens element E1, the second lens element E2, the third lens element E3, the fourth lens element E4, the fifth lens element E5 and the sixth lens element E6, and the object side surface S13 of the seventh lens element E7 are aspheric; the image side surface S14 of the seventh lens E7 is an aspherical surface that is non-rotationally symmetrical.
Table 34 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. Table 35 shows rotationally symmetric components and higher-order coefficients of the rotationally symmetric components that can be used for the rotationally asymmetric aspherical surface S14 in embodiment 9, wherein the rotationally asymmetric aspherical surface profile can be defined by the formula (2) given in embodiment 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -4.76E-03 -7.53E-04 -1.94E-04 -3.01E-05 -1.00E-05 2.59E-06 -2.29E-06 0.00E+00 0.00E+00
S2 -5.46E-02 -7.82E-03 -2.05E-03 -2.90E-04 -4.19E-05 9.65E-06 2.43E-06 0.00E+00 0.00E+00
S3 -7.41E-02 -6.97E-03 -2.47E-03 -3.52E-04 -7.68E-05 2.59E-07 5.35E-06 0.00E+00 0.00E+00
S4 -4.28E-02 -1.17E-02 3.90E-05 1.86E-04 1.88E-04 1.61E-05 1.79E-05 0.00E+00 0.00E+00
S5 -8.73E-02 -1.39E-02 3.52E-03 2.15E-03 3.97E-04 3.37E-06 -6.22E-05 0.00E+00 0.00E+00
S6 -5.79E-02 -3.28E-03 3.94E-03 7.88E-04 -1.18E-04 -3.53E-05 5.81E-05 0.00E+00 0.00E+00
S7 -9.03E-02 -5.10E-03 3.12E-03 -1.74E-03 2.20E-04 -2.20E-04 1.24E-04 0.00E+00 0.00E+00
S8 -1.20E-01 -9.39E-03 1.34E-03 -2.14E-03 4.68E-04 -1.46E-04 1.24E-04 0.00E+00 0.00E+00
S9 7.65E-02 -3.18E-03 2.13E-03 -5.99E-04 -7.94E-05 6.49E-05 -1.25E-05 0.00E+00 0.00E+00
S10 -5.32E-02 5.47E-02 7.00E-03 -3.45E-03 -1.87E-03 -6.17E-04 2.88E-04 0.00E+00 0.00E+00
S11 2.08E-01 -7.48E-01 8.12E-01 -3.47E-01 -2.38E-01 4.02E-01 -2.24E-01 5.82E-02 -5.93E-03
S12 -6.75E-01 3.22E-02 5.65E-02 -2.68E-02 2.04E-02 -4.71E-03 1.38E-04 -1.78E-03 7.63E-04
S13 -1.81E+00 3.72E-01 -1.51E-01 3.74E-02 -8.20E-03 -4.37E-03 -4.34E-03 3.53E-03 -6.31E-04
Watch 34
Table 35
Table 36 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 9, an effective focal length fx in the X-axis direction of the imaging lens, an effective focal length fy in the Y-axis direction of the imaging lens, an optical total length TTL of the imaging lens, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, a maximum half field angle HFOV, and an entrance pupil diameter EPD of the imaging lens.
f1(mm) 4.21 fx(mm) 2.84
f2(mm) -9.65 fy(mm) 2.82
f3(mm) 21.07 TTL(mm) 4.31
f4(mm) -37.30 ImgH(mm) 2.90
f5(mm) 1.77 HFOV(°) 45.8
f6(mm) -5.24 EPD(mm) 1.35
f7(mm) -2.55
Table 36
Fig. 18 shows the magnitude of RMS spot diameters of the imaging lens of example 9 at different image height positions within the first quadrant. As can be seen from fig. 18, the imaging lens provided in embodiment 9 can achieve good imaging quality.
Example 10
An imaging lens according to embodiment 10 of the present application is described below with reference to fig. 19 and 20. Fig. 19 shows a schematic structural diagram of an imaging lens according to embodiment 10 of the present application.
As shown in fig. 19, an 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 negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is 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 positive refractive power, wherein an object-side surface S9 thereof is convex, 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 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 37 shows the surface types, the radius of curvature X, the radius of curvature Y, the thickness, the material, the conic coefficient X, and the conic coefficient Y of each lens of the imaging lens of embodiment 10, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
Table 37
As can be seen from table 37, in example 10, the object side surface and the image side surface of any one of the first lens element E1, the second lens element E2, the third lens element E3, the fourth lens element E4, the fifth lens element E5 and the sixth lens element E6, and the object side surface S13 of the seventh lens element E7 are aspheric; the image side surface S14 of the seventh lens E7 is an aspherical surface that is non-rotationally symmetrical.
Table 38 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 equation (1) given in example 1 above. Table 39 shows the rotationally symmetric components of the non-rotationally symmetric aspherical surface S14 usable in embodiment 10, and the higher-order coefficients of the non-rotationally symmetric components, wherein the non-rotationally symmetric aspherical surface profile can be defined by the formula (2) given in embodiment 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -4.59E-03 -7.34E-04 -2.02E-04 -3.28E-05 -9.77E-06 2.38E-06 -2.28E-06 0.00E+00 0.00E+00
S2 -5.41E-02 -7.73E-03 -2.29E-03 -3.30E-04 -5.02E-05 1.15E-05 3.16E-06 0.00E+00 0.00E+00
S3 -7.38E-02 -6.54E-03 -2.72E-03 -3.92E-04 -9.30E-05 -2.43E-06 4.81E-06 0.00E+00 0.00E+00
S4 -4.27E-02 -1.18E-02 -1.78E-05 1.61E-04 1.93E-04 1.68E-05 1.98E-05 0.00E+00 0.00E+00
S5 -8.69E-02 -1.47E-02 3.44E-03 2.20E-03 4.31E-04 2.30E-05 -5.51E-05 0.00E+00 0.00E+00
S6 -5.67E-02 -3.06E-03 3.94E-03 7.95E-04 -1.13E-04 -3.79E-05 6.68E-05 0.00E+00 0.00E+00
S7 -9.00E-02 -4.99E-03 3.13E-03 -1.75E-03 2.22E-04 -2.25E-04 1.27E-04 0.00E+00 0.00E+00
S8 -1.20E-01 -9.64E-03 1.36E-03 -2.15E-03 4.59E-04 -1.56E-04 1.19E-04 0.00E+00 0.00E+00
S9 7.57E-02 -3.08E-03 2.12E-03 -5.98E-04 -7.73E-05 6.52E-05 -1.23E-05 0.00E+00 0.00E+00
S10 -5.55E-02 5.37E-02 6.88E-03 -3.37E-03 -1.87E-03 -6.22E-04 2.79E-04 0.00E+00 0.00E+00
S11 2.07E-01 -7.48E-01 8.12E-01 -3.47E-01 -2.38E-01 4.02E-01 -2.24E-01 5.82E-02 -5.93E-03
S12 -6.87E-01 3.62E-02 5.42E-02 -2.68E-02 2.03E-02 -4.34E-03 1.63E-04 -1.82E-03 7.49E-04
S13 -1.90E+00 3.80E-01 -1.69E-01 3.95E-02 -1.38E-02 -6.25E-03 -3.80E-03 4.68E-03 -8.73E-04
Table 38
Table 39
Table 40 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 10, an effective focal length fx in the X-axis direction of the imaging lens, an effective focal length fy in the Y-axis direction of the imaging lens, an optical total length TTL of the imaging lens, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, a maximum half field angle HFOV, and an entrance pupil diameter EPD of the imaging lens.
Table 40
Fig. 20 shows the magnitude of RMS spot diameters of the imaging lens of embodiment 10 at different image height positions within the first quadrant. As can be seen from fig. 20, the imaging lens provided in embodiment 10 can achieve good imaging quality.
Example 11
An imaging lens according to embodiment 11 of the present application is described below with reference to fig. 21 and 22.
Fig. 21 shows a schematic structural diagram of an imaging lens according to embodiment 11 of the present application.
As shown in fig. 21, an 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 negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is 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 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 41 shows the surface types, the radius of curvature X, the radius of curvature Y, the thickness, the material, the conic coefficient X, and the conic coefficient Y of each lens of the imaging lens of embodiment 11, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
Table 41
As can be seen from table 41, in example 11, the object side surface and the image side surface of any one of the first lens element E1, the second lens element E2, the third lens element E3, the fourth lens element E4, the fifth lens element E5 and the sixth lens element E6, and the object side surface S13 of the seventh lens element E7 are aspheric; the image side surface S14 of the seventh lens E7 is an aspherical surface that is non-rotationally symmetrical.
Table 42 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. Table 43 shows rotationally symmetric components and higher-order coefficients of the rotationally symmetric components that can be used for the rotationally asymmetric aspherical surface S14 in embodiment 11, wherein the rotationally asymmetric aspherical surface profile can be defined by the formula (2) given in embodiment 1 above.
Table 42
Table 43
Table 44 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 11, an effective focal length fx in the X-axis direction of the imaging lens, an effective focal length fy in the Y-axis direction of the imaging lens, an optical total length TTL of the imaging lens, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, a maximum half field angle HFOV, and an entrance pupil diameter EPD of the imaging lens.
f1(mm) 3.88 fx(mm) 3.05
f2(mm) -9.43 fy(mm) 3.05
f3(mm) 265.06 TTL(mm) 4.28
f4(mm) 21.19 ImgH(mm) 2.93
f5(mm) 1.83 HFOV(°) 45.0
f6(mm) -4.94 EPD(mm) 1.32
f7(mm) -2.65
Table 44
Fig. 22 shows the magnitude of RMS spot diameters of the imaging lens of example 11 at different image height positions within the first quadrant. As can be seen from fig. 22, the imaging lens provided in embodiment 11 can achieve good imaging quality.
In summary, examples 1 to 11 satisfy the relationships shown in table 45, respectively.
Table 45
The present application also provides an image pickup apparatus, in which the electron photosensitive element may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be a stand-alone imaging apparatus such as a digital camera, or may be an imaging module integrated on a mobile electronic apparatus such as a cellular phone. The image pickup apparatus is equipped with the 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 (13)

1. The 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, characterized in that,
the first lens has positive focal power, and the object side surface of the first lens is a convex surface;
the second lens has optical power, and the image side surface of the second lens is a concave surface;
the third lens has optical power;
the fourth lens is provided with focal power, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a concave surface;
the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface;
the sixth lens has negative focal power, and the image side surface of the sixth lens is a concave surface;
the seventh lens is provided with negative focal power, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface;
the number of lenses with focal power in the imaging lens is seven;
the effective focal length fy of the imaging lens in the Y-axis direction and the effective focal length f5 of the fifth lens meet the conditions that 1.5 is smaller than fy/f5 is smaller than 2.0;
the sum of center thicknesses sigma CT of the first lens to the seventh lens on the optical axis and the sum of air intervals sigma T of any two adjacent lenses of the first lens to the seventh lens on the optical axis respectively meet 3 < sigmaCT/sigmaT < 3.6;
The effective focal length fx of the entrance pupil diameter EPD of the imaging lens and the X-axis direction of the imaging lens is more than 2.0 and less than 2.4; and
the effective focal length fy of the entrance pupil diameter EPD of the imaging lens and the Y-axis direction of the imaging lens is 2.0 < fy/EPD < 2.4.
2. The imaging lens as claimed in claim 1, wherein at least one of the first to seventh lenses has an aspherical surface which is non-rotationally symmetrical.
3. The imaging lens according to claim 1, wherein an effective focal length fx in an X-axis direction of the imaging lens and an effective focal length fy in a Y-axis direction of the imaging lens satisfy 0.9 < fx/fy < 1.1.
4. The imaging lens as claimed in claim 1, wherein an effective focal length f7 of the seventh lens and a radius of curvature R14 in a Y-axis direction of an image side surface of the seventh lens satisfy-2.9 < f7/R14 < -2.6.
5. The imaging lens as claimed in claim 4, wherein an effective focal length fy in a Y-axis direction of the imaging lens, a radius of curvature R13 in a Y-axis direction of an object-side surface of the seventh lens, and a radius of curvature R14 in a Y-axis direction of an image-side surface of the seventh lens satisfy 0.6 < fy/(r13+r14) < 0.8.
6. The imaging lens as claimed in claim 4, wherein a radius of curvature R13 in a Y-axis direction of an object side surface of the seventh lens and a radius of curvature R14 in a Y-axis direction of an image side surface of the seventh lens satisfy 1.8.ltoreq.r13+r14)/(R13-R14) < 2.
7. The imaging lens as claimed in claim 4, wherein a radius of curvature R14 in a Y-axis direction of an image side surface of the seventh lens and a radius of curvature R14X in an X-axis direction of the image side surface of the seventh lens satisfy 0.8 < R14/R14X < 1.2.
8. The imaging lens as claimed in claim 1, wherein an effective focal length f5 of the fifth lens and a radius of curvature R10 in a Y-axis direction of an image side surface of the fifth lens satisfy-2.2 < f5/R10 < -1.8.
9. The imaging lens as claimed in claim 1, wherein an effective half-caliber DT72 of an image side surface of the seventh lens and an effective half-caliber DT11 of an object side surface of the first lens satisfy 3.1 < DT72/DT11 < 3.8.
10. The imaging lens as claimed in claim 1, wherein an edge thickness ET6 of the sixth lens and an edge thickness ET5 of the fifth lens satisfy 1.7 < ET6/ET5 < 2.6.
11. The imaging lens as claimed in claim 10, wherein an edge thickness ET5 of the fifth lens and a center thickness CT5 of the fifth lens on the optical axis satisfy 3.1 < CT5/ET5 < 4.2.
12. The imaging lens according to any one of claims 1 to 11, wherein a center thickness CT5 of the fifth lens on the optical axis and a distance TTL between an object side surface of the first lens and an imaging surface of the imaging lens on the optical axis satisfy 0.1 < CT5/TTL < 0.3.
13. The imaging lens of any of claims 1 to 11, wherein a distance TTL on the optical axis from an object side surface of the first lens to an imaging surface of the imaging lens and a half of a diagonal length ImgH of an effective pixel area on the imaging surface of the imaging lens satisfy 1.3 < TTL/ImgH < 1.5.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109597188B (en) * 2019-02-13 2024-04-12 浙江舜宇光学有限公司 Image pickup lens group
CN115657268A (en) * 2019-08-09 2023-01-31 华为技术有限公司 Camera module and terminal equipment
WO2021026869A1 (en) 2019-08-15 2021-02-18 南昌欧菲精密光学制品有限公司 Optical system, image capturing module and electronic device
CN110333594A (en) * 2019-08-20 2019-10-15 浙江舜宇光学有限公司 Optical imaging lens
EP3896510A4 (en) * 2019-11-04 2022-08-10 Jiangxi Jingchao Optical Co., Ltd. Optical system, image capturing device and electronic device
WO2021134286A1 (en) * 2019-12-30 2021-07-08 诚瑞光学(常州)股份有限公司 Camera optical lens
US11719911B2 (en) 2020-02-14 2023-08-08 Largan Precision Co., Ltd. Imaging optical lens assembly, image capturing unit and electronic device
TWI712816B (en) 2020-02-14 2020-12-11 大立光電股份有限公司 Imaging optical lens assembly, image capturing unit and electronic device
CN111198435B (en) * 2020-02-24 2021-09-24 诚瑞光学(常州)股份有限公司 Image pickup optical lens
WO2022120515A1 (en) * 2020-12-07 2022-06-16 欧菲光集团股份有限公司 Optical system, photographing module, and electronic device
CN112817130B (en) * 2021-02-26 2022-11-11 Oppo广东移动通信有限公司 Optical imaging system, camera and electronic equipment

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1456915A (en) * 2002-05-07 2003-11-19 佳能株式会社 Optical imaging system and reader therewith
CN101900868A (en) * 2009-05-27 2010-12-01 柯尼卡美能达精密光学株式会社 Anamorphic lens
CN204028445U (en) * 2013-06-21 2014-12-17 康达智株式会社 Pick-up lens
CN105988199A (en) * 2015-02-17 2016-10-05 大立光电股份有限公司 Photographic system, image pickup device and electronic device
CN107015347A (en) * 2017-06-08 2017-08-04 浙江舜宇光学有限公司 Pick-up lens
CN107479172A (en) * 2017-09-27 2017-12-15 浙江舜宇光学有限公司 Imaging lens system group
CN209624884U (en) * 2018-12-07 2019-11-12 浙江舜宇光学有限公司 Imaging lens

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1456915A (en) * 2002-05-07 2003-11-19 佳能株式会社 Optical imaging system and reader therewith
CN101900868A (en) * 2009-05-27 2010-12-01 柯尼卡美能达精密光学株式会社 Anamorphic lens
CN204028445U (en) * 2013-06-21 2014-12-17 康达智株式会社 Pick-up lens
CN105988199A (en) * 2015-02-17 2016-10-05 大立光电股份有限公司 Photographic system, image pickup device and electronic device
CN107015347A (en) * 2017-06-08 2017-08-04 浙江舜宇光学有限公司 Pick-up lens
CN107479172A (en) * 2017-09-27 2017-12-15 浙江舜宇光学有限公司 Imaging lens system group
CN209624884U (en) * 2018-12-07 2019-11-12 浙江舜宇光学有限公司 Imaging lens

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