CN113359282B - Optical imaging lens - Google Patents

Optical imaging lens Download PDF

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Publication number
CN113359282B
CN113359282B CN202110744955.8A CN202110744955A CN113359282B CN 113359282 B CN113359282 B CN 113359282B CN 202110744955 A CN202110744955 A CN 202110744955A CN 113359282 B CN113359282 B CN 113359282B
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lens
optical imaging
optical
image
radius
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CN113359282A (en
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闻人建科
戴付建
赵烈烽
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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Priority to CN202210956746.4A priority Critical patent/CN115561877A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • 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

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

Abstract

The application discloses optical imaging lens includes following preface from object side to image side along optical axis: a first lens having a positive optical power; a second lens having an optical power; a third lens having a focal power; a fourth lens having an optical power; a fifth lens having optical power; a sixth lens having optical power; a seventh lens with positive focal power, the image side surface of which is convex; and an eighth lens having a negative optical power. The distance BFL along the optical axis from the image side surface of the eighth lens to the imaging surface of the optical imaging lens, the half of the diagonal length ImgH of the effective pixel area on the imaging surface and the distance TTL along the optical axis from the object side surface of the first lens to the imaging surface satisfy the following conditions: 1.8mm < (BFL × ImgH)/TTL < 3.0 mm.

Description

Optical imaging lens
Technical Field
The present application relates to the field of optical elements, and more particularly, to an optical imaging lens.
Background
With the vigorous development of smart phones, smart phone manufacturers have higher design requirements for mobile phone lenses, and need to provide an optical solution with a larger image plane and higher imaging quality while meeting the requirements for high performance, large aperture, thermal stability and the like.
Disclosure of Invention
An aspect of the present disclosure provides an optical imaging lens, sequentially from an object side to an image side along an optical axis, comprising: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having optical power; a fourth lens having a focal power; a fifth lens having optical power; a sixth lens having a focal power; a seventh lens with positive focal power, the image side surface of which is convex; and an eighth lens having a negative optical power. The distance BFL along the optical axis from the image side surface of the eighth lens element to the imaging surface of the optical imaging lens, the half of the length ImgH of the diagonal line of the effective pixel area on the imaging surface and the distance TTL along the optical axis from the object side surface of the first lens element to the imaging surface can satisfy 1.8mm < (BFL multiplied by ImgH)/TTL < 3.0 mm.
In one embodiment, the effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens may satisfy: 7.5mm < f × tan (FOV/2) < 8.5 mm.
In one embodiment, the effective focal length f1 of the first lens, the radius of curvature R1 of the object-side surface of the first lens, and the radius of curvature R2 of the image-side surface of the first lens may satisfy: f1/(R1+ R2) < 1.3 in a range of 0.7 < f.
In one embodiment, the effective focal length f2 of the second lens, the effective focal length f6 of the sixth lens, and the effective focal length f3 of the third lens may satisfy: 0.5 < (f2-f6)/f3 < 1.9.
In one embodiment, the effective focal length f7 of the seventh lens, the effective focal length f8 of the eighth lens and the effective focal length f of the optical imaging lens may satisfy: 0.7 < (f7-f8)/f < 1.1.
In one embodiment, the radius of curvature R5 of the object-side surface of the third lens, the radius of curvature R6 of the image-side surface of the third lens, the radius of curvature R3 of the object-side surface of the second lens, and the radius of curvature R4 of the image-side surface of the second lens may satisfy: 1.0 < (R5+ R6)/(R3+ R4) < 1.5.
In one embodiment, a radius of curvature R13 of the object-side surface of the seventh lens and a radius of curvature R14 of the image-side surface of the seventh lens may satisfy: 1.8 < (R13-R14)/(R13+ R14) < 3.4.
In one embodiment, the radius of curvature R16 of the image-side surface of the eighth lens, the radius of curvature R15 of the object-side surface of the eighth lens, and the effective focal length f of the optical imaging lens may satisfy: 0.7 < (R16-R15)/f < 1.2.
In one embodiment, a sum Σ CT of center thicknesses of the respective lenses of the first to eighth lenses on the optical axis and a distance BFL from an image side surface of the eighth lens to the image forming surface along the optical axis may satisfy: 1.6 <. sigma CT/BFL < 2.1.
In one embodiment, the maximum effective radius DT81 of the object-side surface of the eighth lens, the maximum effective radius DT82 of the image-side surface of the eighth lens, and half of the diagonal length ImgH of the effective pixel area on the imaging plane may satisfy: 1.1 < (DT81+ DT82)/ImgH < 1.5.
In one embodiment, a combined focal length f123 of the first lens, the second lens, and the third lens, a center thickness CT1 of the first lens on the optical axis and a center thickness CT2 of the second lens on the optical axis, and a center thickness CT3 of the third lens on the optical axis may satisfy: 4.5 < f123/(CT1+ CT2+ CT3) < 5.8.
In one embodiment, an on-axis distance SAG72 from an intersection point of an image-side surface and an optical axis of the seventh lens to an effective radius vertex of the image-side surface of the seventh lens to an on-axis distance SAG71 from an intersection point of an object-side surface and an optical axis of the seventh lens to an effective radius vertex of the object-side surface of the seventh lens may satisfy: 1.4 < SAG72/SAG71 < 1.8.
In one embodiment, an on-axis distance SAG61 from an intersection point of an object-side surface and an optical axis of the sixth lens to an effective radius vertex of an object-side surface of the sixth lens, an on-axis distance SAG62 from an intersection point of an image-side surface and an optical axis of the sixth lens to an effective radius vertex of an image-side surface of the sixth lens, and an on-axis distance SAG81 from an intersection point of an object-side surface and an optical axis of the eighth lens to an effective radius vertex of an object-side surface of the eighth lens may satisfy: 0.7 < (SAG61+ SAG62)/SAG81 < 1.5.
In one embodiment, the edge thickness ET8 of the eighth lens and the edge thickness ET7 of the seventh lens may satisfy: 0.9 < ET8/ET7 < 2.2.
Another aspect of the present disclosure provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having optical power; a fourth lens having an optical power; a fifth lens having optical power; a sixth lens having optical power; a seventh lens having positive refractive power, an image side surface of which is convex; and an eighth lens having a negative optical power. A sum Σ CT of center thicknesses of the respective lenses of the first lens to the eighth lens on the optical axis and a distance BFL from an image side surface of the eighth lens to the image forming surface along the optical axis may satisfy: 1.6 <. sigma CT/BFL < 2.1.
In one embodiment, the effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens may satisfy: 7.5mm < f × tan (FOV/2) < 8.5 mm.
In one embodiment, the effective focal length f1 of the first lens, the radius of curvature R1 of the object-side surface of the first lens, and the radius of curvature R2 of the image-side surface of the first lens may satisfy: 0.7 < f1/(R1+ R2) < 1.3.
In one embodiment, a distance BFL along the optical axis from the image side surface of the eighth lens element to the image plane of the optical imaging lens, ImgH which is a half of a diagonal length of an effective pixel region on the image plane, and a distance TTL along the optical axis from the object side surface of the first lens element to the image plane may satisfy 1.8mm < (BFL × ImgH)/TTL < 3.0 mm.
In one embodiment, the effective focal length f2 of the second lens, the effective focal length f6 of the sixth lens, and the effective focal length f3 of the third lens may satisfy: 0.5 < (f2-f6)/f3 < 1.9.
In one embodiment, the effective focal length f7 of the seventh lens, the effective focal length f8 of the eighth lens and the effective focal length f of the optical imaging lens may satisfy: 0.7 < (f7-f8)/f < 1.1.
In one embodiment, the radius of curvature R5 of the object-side surface of the third lens, the radius of curvature R6 of the image-side surface of the third lens, the radius of curvature R3 of the object-side surface of the second lens, and the radius of curvature R4 of the image-side surface of the second lens may satisfy: 1.0 < (R5+ R6)/(R3+ R4) < 1.5.
In one embodiment, a radius of curvature R13 of the object-side surface of the seventh lens and a radius of curvature R14 of the image-side surface of the seventh lens may satisfy: 1.8 < (R13-R14)/(R13+ R14) < 3.4.
In one embodiment, the radius of curvature R16 of the image-side surface of the eighth lens, the radius of curvature R15 of the object-side surface of the eighth lens, and the effective focal length f of the optical imaging lens may satisfy: 0.7 < (R16-R15)/f < 1.2.
In one embodiment, the maximum effective radius DT81 of the object-side surface of the eighth lens, the maximum effective radius DT82 of the image-side surface of the eighth lens, and half of the diagonal length ImgH of the effective pixel area on the imaging plane may satisfy: 1.1 < (DT81+ DT82)/ImgH < 1.5.
In one embodiment, a combined focal length f123 of the first lens, the second lens, and the third lens, a center thickness CT1 of the first lens on the optical axis and a center thickness CT2 of the second lens on the optical axis, and a center thickness CT3 of the third lens on the optical axis may satisfy: 4.5 < f123/(CT1+ CT2+ CT3) < 5.8.
In one embodiment, an on-axis distance SAG72 from an intersection point of an image-side surface and an optical axis of the seventh lens to an effective radius vertex of the image-side surface of the seventh lens to an on-axis distance SAG71 from an intersection point of an object-side surface and an optical axis of the seventh lens to an effective radius vertex of the object-side surface of the seventh lens may satisfy: 1.4 < SAG72/SAG71 < 1.8.
In one embodiment, an on-axis distance SAG61 from an intersection point of an object-side surface and an optical axis of the sixth lens to an effective radius vertex of an object-side surface of the sixth lens, an on-axis distance SAG62 from an intersection point of an image-side surface and an optical axis of the sixth lens to an effective radius vertex of an image-side surface of the sixth lens, and an on-axis distance SAG81 from an intersection point of an object-side surface and an optical axis of the eighth lens to an effective radius vertex of an object-side surface of the eighth lens may satisfy: 0.7 < (SAG61+ SAG62)/SAG81 < 1.5.
In one embodiment, the edge thickness ET8 of the eighth lens and the edge thickness ET7 of the seventh lens may satisfy: 0.9 < ET8/ET7 < 2.2.
The eight-piece type lens framework is adopted, the focal power of each lens is reasonably distributed, the surface type and the thickness of each lens are optimally selected, the lens has the beneficial effects of at least one of super-large image surface, high resolution, better macro performance and the like, and the application requirement of the main camera of the high-end smart phone can be better met.
Drawings
Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 shows a schematic structural view of an optical imaging lens according to embodiment 1 of the present application;
fig. 2A to 2D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 1;
fig. 3 is a schematic structural view showing an optical imaging lens according to embodiment 2 of the present application;
fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 2;
fig. 5 is a schematic structural view showing an optical imaging lens according to embodiment 3 of the present application;
fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 3;
fig. 7 is a schematic structural view showing an optical imaging lens according to embodiment 4 of the present application;
fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 4;
fig. 9 is a schematic structural view showing an optical imaging lens according to embodiment 5 of the present application;
fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 5;
fig. 11 is a schematic structural view showing an optical imaging lens according to embodiment 6 of the present application;
fig. 12A to 12D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the optical imaging lens of embodiment 6, respectively;
fig. 13 is a schematic structural view showing an optical imaging lens according to embodiment 7 of the present application; and
fig. 14A to 14D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the optical imaging lens of embodiment 7, respectively.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. In this document, the surface of each lens closest to the subject is referred to as the object-side surface of the lens, and the surface of each lens closest to the image plane is referred to as the image-side surface of the lens.
It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The features, principles, and other aspects of the present application are described in detail below.
The optical imaging lens according to an exemplary embodiment of the present application may include, for example, eight lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The eight lenses are arranged in order from an object side to an image side along an optical axis.
In an exemplary embodiment, the first lens may have a positive optical power; the second lens may have a positive or negative optical power; the third lens may have a positive optical power or a negative optical power; the fourth lens may have a positive power or a negative power; the fifth lens may have a positive power or a negative power; the sixth lens may have a positive optical power or a negative optical power; the seventh lens may have a positive optical power; the eighth lens may have a negative optical power.
In an exemplary embodiment, an image side surface of the seventh lens may be a convex surface.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.8mm < (BFL × ImgH)/TTL < 3.0mm, where BFL is a distance along the optical axis from the image-side surface of the eighth lens to the imaging surface of the optical imaging lens, ImgH is a half of a diagonal length of the effective pixel region on the imaging surface, and TTL is a distance along the optical axis from the object-side surface of the first lens to the imaging surface. The distance from the image side surface of the eighth lens to the imaging surface of the optical imaging lens along the optical axis, the half of the diagonal length of the effective pixel area on the imaging surface and the distance from the object side surface of the first lens to the imaging surface along the optical axis satisfy the conditional expression that 1.8mm < (BFL multiplied by Imgh)/TTL < 3.0mm, the length of the mechanical back focus can be increased, the size of the optical body can be compressed, and the reduction of the incident angle of the main light ray of the light ray can be facilitated. More specifically, BFL, ImgH and TTL may satisfy 2.0mm < (BFL × ImgH)/TTL < 2.4 mm.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 7.5mm < f × tan (FOV/2) < 8.5mm, where f is an effective focal length of the optical imaging lens and FOV is a maximum angle of view of the optical imaging lens. By controlling the effective focal length of the optical imaging lens and the maximum field angle of the optical imaging lens to satisfy the conditional expression 7.5mm < f multiplied by tan (FOV/2) < 8.5mm, the optical system can have better magnification and has better detail identification capability during framing. More specifically, f and FOV may satisfy 8.0mm < f × tan (FOV/2) < 8.1 mm.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.7 < f1/(R1+ R2) < 1.3, where f1 is an effective focal length of the first lens, R1 is a radius of curvature of an object-side surface of the first lens, and R2 is a radius of curvature of an image-side surface of the first lens. By controlling the ratio of the effective focal length of the first lens to the sum of the curvature radius of the object side surface of the first lens and the curvature radius of the image side surface of the first lens to be in the range, the effective focal length of the first lens can be effectively controlled, and light rays can be converged favorably. More specifically, f1, R1 and R2 may satisfy 0.8 < f1/(R1+ R2) < 1.2.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.5 < (f2-f6)/f3 < 1.9, where f2 is an effective focal length of the second lens, f6 is an effective focal length of the sixth lens, and f3 is an effective focal length of the third lens. By controlling the ratio of the difference between the effective focal length of the second lens and the effective focal length of the sixth lens to the effective focal length of the third lens to be within the range, the focal power ranges of the second lens, the third lens and the sixth lens can be effectively controlled, which is beneficial to improving the performance of the optical system. More specifically, f2, f6 and f3 may satisfy 0.6 < (f2-f6)/f3 < 1.8.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.7 < (f7-f8)/f < 1.1, where f7 is an effective focal length of the seventh lens, f8 is an effective focal length of the eighth lens, and f is an effective focal length of the optical imaging lens. By controlling the ratio of the difference between the effective focal length of the seventh lens and the effective focal length of the eighth lens to the effective focal length of the optical imaging lens within the range, the seventh lens and the eighth lens can be effectively controlled to be of a symmetrical structure, so that the aberrations such as coma aberration and chromatic aberration of an optical system can be balanced, the upper limit of the imaging quality can be improved, and the assembly yield of the optical system can be improved. More specifically, f7, f8 and f may satisfy 0.8 < (f7-f8)/f < 1.0.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.0 < (R5+ R6)/(R3+ R4) < 1.5, where R5 is a radius of curvature of an object-side surface of the third lens, R6 is a radius of curvature of an image-side surface of the third lens, R3 is a radius of curvature of an object-side surface of the second lens, and R4 is a radius of curvature of an image-side surface of the second lens. By controlling the ratio of the sum of the radius of curvature of the object-side surface of the third lens and the radius of curvature of the image-side surface of the third lens to the sum of the radius of curvature of the object-side surface of the second lens and the radius of curvature of the image-side surface of the second lens to be within the range, the power of the second lens and the third lens is controlled to be reasonably distributed, and the contribution of the thickness of the third lens to the curvature of field can be made to be within a reasonable range. More specifically, R5, R6, R3 and R4 may satisfy 1.1 < (R5+ R6)/(R3+ R4) < 1.4.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.8 < (R13-R14)/(R13+ R14) < 3.4, where R13 is a radius of curvature of an object-side surface of the seventh lens and R14 is a radius of curvature of an image-side surface of the seventh lens. By controlling the ratio of the difference between the curvature radius of the object-side surface of the seventh lens element and the curvature radius of the image-side surface of the seventh lens element to the sum of the curvature radius of the object-side surface of the seventh lens element and the curvature radius of the image-side surface of the seventh lens element within this range, the optical system can obtain a larger mechanical back focus, and the resolving power under close-range conditions can be ensured. More specifically, R13 and R14 may satisfy 2.0 < (R13-R14)/(R13+ R14) < 3.3.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.7 < (R16-R15)/f < 1.2, where R16 is a radius of curvature of an image-side surface of the eighth lens, R15 is a radius of curvature of an object-side surface of the eighth lens, and f is an effective focal length of the optical imaging lens. By controlling the ratio of the difference between the curvature radius of the image side surface of the eighth lens element and the curvature radius of the object side surface of the eighth lens element to the effective focal length of the optical imaging lens within the range, the on-axis spherical aberration, chromatic aberration and spherical aberration of the optical imaging lens can be well controlled. More specifically, R16, R15 and f may satisfy 0.8 < (R16-R15)/f < 1.1.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.6 < Σct/BFL < 2.1, where Σ CT is the sum of the center thicknesses of the respective first to eighth lenses on the optical axis, and BFL is the distance along the optical axis from the image-side surface of the eighth lens to the imaging surface. By controlling the ratio of the sum of the central thicknesses of the first lens to the eighth lens on the optical axis to the distance from the image side surface of the eighth lens to the imaging surface along the optical axis to be in the range, the thickness distribution of the lenses is favorably controlled, the processability of each lens can be effectively improved, the production risk of the whole optical system is reduced, and the mechanical back focus can be elongated. More specifically, Sigma CT and BFL may satisfy 1.7 < SigmaCT/BFL < 2.0.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.1 < (DT81+ DT82)/ImgH < 1.5, where DT81 is the maximum effective radius of the object-side surface of the eighth lens, DT82 is the maximum effective radius of the image-side surface of the eighth lens, and ImgH is half the diagonal length of the effective pixel region on the imaging plane. The manufacturability of the eighth lens can be improved by controlling the ratio of the sum of the maximum effective radius of the object side surface of the eighth lens and the maximum effective radius of the image side surface of the eighth lens to the half of the diagonal length of the effective pixel area on the imaging surface in the range, and meanwhile, controlling the effective half aperture of the eighth lens is beneficial to aberration balance. More specifically, DT81, DT82 and ImgH may satisfy 1.2 < (DT81+ DT82)/ImgH < 1.4.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 4.5 < f123/(CT1+ CT2+ CT3) < 5.8, where f123 is a combined focal length of the first lens, the second lens, and the third lens, CT1 is a center thickness of the first lens on an optical axis, CT2 is a center thickness of the second lens on the optical axis, and CT3 is a center thickness of the third lens on the optical axis. By controlling the ratio of the combined focal length of the first lens, the second lens and the third lens to the sum of the central thicknesses of the first lens, the second lens and the third lens on the optical axis within the range, the imaging quality of the optical system is improved, and the size of the body of the system is reduced. More specifically, f123, CT1, CT2, and CT3 may satisfy 4.7 < f123/(CT1+ CT2+ CT3) < 5.7.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.4 < SAG72/SAG71 < 1.8, where SAG72 is an on-axis distance from an intersection of an image-side surface of the seventh lens and the optical axis to an effective radius vertex of the image-side surface of the seventh lens, and SAG71 is an on-axis distance from an intersection of an object-side surface of the seventh lens and the optical axis to an effective radius vertex of the object-side surface of the seventh lens. The manufacturability of the assembly can be improved by controlling the ratio of the on-axis distance from the intersection point of the image-side surface of the seventh lens and the optical axis to the effective radius vertex of the image-side surface of the seventh lens to the on-axis distance from the intersection point of the object-side surface of the seventh lens and the optical axis to the effective radius vertex of the object-side surface of the seventh lens within this range. More specifically, SAG72 and SAG71 may satisfy 1.5 < SAG72/SAG71 < 1.7.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.7 < (SAG61+ SAG62)/SAG81 < 1.5, where SAG61 is an on-axis distance from an intersection of an object-side surface of the sixth lens and the optical axis to an effective radius vertex of the object-side surface of the sixth lens, SAG62 is an on-axis distance from an intersection of an image-side surface of the sixth lens and the optical axis to an effective radius vertex of the image-side surface of the sixth lens, and SAG81 is an on-axis distance from an intersection of an object-side surface of the eighth lens and the optical axis to an effective radius vertex of the object-side surface of the eighth lens. The ratio of the sum of the axial distance from the intersection point of the object-side surface of the sixth lens and the optical axis to the effective radius peak of the object-side surface of the sixth lens to the axial distance from the intersection point of the image-side surface of the sixth lens and the optical axis to the effective radius peak of the image-side surface of the sixth lens to the axial distance from the intersection point of the object-side surface of the eighth lens and the optical axis to the effective radius peak of the object-side surface of the eighth lens is controlled within the range, the rise and the center thickness of the sixth lens are favorably controlled, the forming manufacturability of the sixth lens can be effectively improved, and the manufacturing safety is improved. More specifically, SAG61, SAG62 and SAG81 may satisfy 0.7 < (SAG61+ SAG62)/SAG81 < 1.4.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.9 < ET8/ET7 < 2.2, where ET8 is an edge thickness of the eighth lens and ET7 is an edge thickness of the seventh lens. By controlling the ratio of the edge thickness of the eighth lens to the edge thickness of the seventh lens to be in the range, the method is beneficial to the lens process of the seventh lens and the eighth lens, and can effectively reduce the molding risk of the optical system. More specifically, ET8 and ET7 may satisfy 1.0 < ET8/ET7 < 2.1.
In an exemplary embodiment, the optical imaging lens may further include at least one diaphragm. The stop may be disposed at an appropriate position as needed, for example, between the object side and the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on the imaging surface.
The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, eight lenses as described above. By reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the on-axis distance between the lenses and the like, the lens has the characteristics of super-large image surface, high resolution, better macro performance and the like, and can better meet the application requirements of a main camera of a high-end smart phone.
In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object-side surface of the first lens to the image-side surface of the eighth lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated in imaging can be eliminated as much as possible, and the imaging quality is further improved. 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, the seventh lens, and the eighth lens is an aspherical mirror surface. Optionally, each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens has an object-side surface and an image-side surface which are aspheric mirror surfaces.
However, it will be appreciated by those skilled in the art that the number of lenses constituting the optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed technical solutions. For example, although eight lenses are exemplified in the embodiment, the optical imaging lens is not limited to include eight lenses. The optical imaging lens may also include other numbers of lenses, if desired.
Specific examples of an optical imaging lens applicable to the above-described embodiments are further described below with reference to the drawings.
Example 1
An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic structural diagram of an optical imaging lens according to embodiment 1 of the present application.
As shown in fig. 1, the optical imaging lens includes, in order from an object side to an image side along an optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from the object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.
Table 1 shows basic parameters of the optical imaging lens of embodiment 1, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm).
Figure BDA0003144093980000071
Figure BDA0003144093980000081
TABLE 1
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the eighth lens E8 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:
Figure BDA0003144093980000082
wherein x is the distance rise from the vertex of the aspheric surface when the aspheric surface is at the position with the height of h along the optical axis direction; c. CParaxial curvature which is aspherical, c ═ 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2-1 and Table 2-2 below show the coefficients A of the high-order terms that can be used for the aspherical mirrors S1 to S16 in example 1 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 And A 30 。
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -5.9932E-05 -7.9085E-04 1.3698E-03 -1.6833E-03 1.3174E-03 -6.7742E-04 2.3279E-04
S2 -2.3837E-04 -5.1451E-03 1.0339E-02 -1.3076E-02 1.0863E-02 -6.1869E-03 2.4869E-03
S3 -3.9314E-03 7.6723E-04 1.3455E-03 -2.8782E-03 2.8222E-03 -1.6841E-03 6.6822E-04
S4 -6.6962E-03 7.4969E-04 4.9965E-03 -8.1482E-03 7.2243E-03 -4.1856E-03 1.6830E-03
S5 -1.0122E-02 9.3714E-03 -1.7820E-02 2.6397E-02 -2.6568E-02 1.8413E-02 -9.0019E-03
S6 -6.0120E-03 2.9550E-04 2.8791E-03 -7.9226E-03 1.1433E-02 -1.0210E-02 5.9667E-03
S7 -1.3000E-02 4.3465E-03 -1.2244E-02 2.1414E-02 -2.4758E-02 1.9317E-02 -1.0397E-02
S8 -1.8946E-02 5.1458E-03 -5.5964E-03 5.2551E-03 -3.7923E-03 2.0349E-03 -8.0352E-04
S9 -1.9406E-02 7.5798E-03 -6.7590E-03 4.9677E-03 -2.8167E-03 1.2301E-03 -4.0480E-04
S10 -1.6095E-02 7.4516E-03 -4.4745E-03 1.8164E-03 -4.7401E-04 7.6373E-05 -6.4570E-06
S11 -3.9529E-02 1.6839E-02 -5.5383E-03 1.0673E-03 -3.1535E-05 -4.7951E-05 1.5848E-05
S12 -5.4422E-02 1.9587E-02 -6.6291E-03 1.8102E-03 -3.8563E-04 6.4077E-05 -8.1630E-06
S13 -1.4605E-02 3.8370E-03 -9.7529E-04 1.3924E-04 -1.4256E-05 1.1877E-06 -7.7432E-08
S14 2.4210E-02 -2.5916E-03 3.5977E-05 1.1229E-05 -6.4553E-07 -1.4091E-08 2.9413E-09
S15 1.1488E-02 -4.8634E-03 9.0668E-04 -8.8686E-05 5.2621E-06 -1.9848E-07 4.6098E-09
S16 -1.5707E-02 1.1931E-03 -6.7418E-05 2.3265E-06 -6.5609E-08 3.5453E-09 -2.3333E-10
TABLE 2-1
Figure BDA0003144093980000083
Figure BDA0003144093980000091
Tables 2 to 2
Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 1. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 1, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens according to embodiment 1 can achieve good imaging quality.
Example 2
An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 3 shows a schematic structural diagram of an optical imaging lens according to embodiment 2 of the present application.
As shown in fig. 3, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from the object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.
Table 3 shows basic parameters of the optical imaging lens of embodiment 2, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 4-1 and 4-2 show the coefficients A of the high-order terms that can be used for the respective aspherical mirrors S1 to S16 in example 2 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 And A 30 Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.
Figure BDA0003144093980000092
Figure BDA0003144093980000101
TABLE 3
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -1.2088E-04 2.1722E-04 -7.3997E-04 1.1533E-03 -1.2370E-03 9.3472E-04 -5.0376E-04
S2 -1.0292E-03 -1.0235E-02 2.9533E-02 -4.4578E-02 4.1624E-02 -2.6060E-02 1.1405E-02
S3 -6.7144E-03 1.3534E-03 9.0950E-03 -1.8101E-02 1.7655E-02 -1.0694E-02 4.3354E-03
S4 -9.1423E-03 6.3451E-04 1.5449E-02 -2.9531E-02 3.0199E-02 -1.9739E-02 8.7168E-03
S5 -1.1881E-02 1.3976E-02 -2.9435E-02 5.0466E-02 -6.0068E-02 4.9317E-02 -2.8313E-02
S6 -6.9462E-03 1.0490E-02 -3.0994E-02 5.9821E-02 -7.5209E-02 6.3890E-02 -3.7603E-02
S7 -1.5032E-02 -8.3911E-04 2.0093E-03 -8.4513E-04 -2.4820E-03 4.3784E-03 -3.5746E-03
S8 -2.5561E-02 9.8378E-03 -1.9779E-02 2.7471E-02 -2.5163E-02 1.5743E-02 -6.8725E-03
S9 -1.9899E-02 1.0719E-02 -1.7339E-02 1.8157E-02 -1.2951E-02 6.6170E-03 -2.4544E-03
S10 -1.2435E-02 7.6824E-03 -6.4082E-03 3.3390E-03 -1.0705E-03 2.0336E-04 -1.9076E-05
S11 -4.3197E-02 1.6605E-02 -1.3559E-03 -3.3102E-03 2.4000E-03 -8.9711E-04 2.1439E-04
S12 -6.1384E-02 2.3571E-02 -7.7728E-03 1.8413E-03 -2.7685E-04 2.3939E-05 -7.6394E-07
S13 -1.8859E-02 8.0240E-03 -2.6231E-03 5.0771E-04 -6.9958E-05 7.2827E-06 -5.6390E-07
S14 3.9363E-02 -3.8535E-03 -2.8055E-04 1.0539E-04 -1.2319E-05 8.6161E-07 -4.0823E-08
S15 2.8692E-02 -1.0745E-02 2.1864E-03 -2.6431E-04 2.1143E-05 -1.1850E-06 4.7891E-08
S16 -1.8970E-02 1.6644E-03 -1.0568E-04 4.3388E-06 -1.1362E-07 2.0278E-09 -3.7873E-11
TABLE 4-1
Figure BDA0003144093980000102
Figure BDA0003144093980000111
TABLE 4-2
Fig. 4A shows on-axis chromatic aberration curves of the optical imaging lens of embodiment 2, which represent the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 2. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens according to embodiment 2 can achieve good imaging quality.
Example 3
An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic structural diagram of an optical imaging lens according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. The filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from the object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.
Table 5 shows basic parameters of the optical imaging lens of embodiment 3, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 6-1 and 6-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S16 in example 3 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 And A 30 Which isEach aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.
Figure BDA0003144093980000112
Figure BDA0003144093980000121
TABLE 5
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -8.1352E-04 2.9410E-03 -8.8901E-03 1.5313E-02 -1.6618E-02 1.1961E-02 -5.9208E-03
S2 -2.9223E-03 -1.3648E-03 9.6394E-03 -2.1147E-02 2.4064E-02 -1.7237E-02 8.3512E-03
S3 -9.6021E-03 1.9357E-02 -3.0274E-02 3.0196E-02 -2.0303E-02 9.3818E-03 -2.9764E-03
S4 -8.6240E-03 -9.0521E-04 2.6408E-02 -5.3334E-02 5.8096E-02 -4.0057E-02 1.8450E-02
S5 -6.3126E-03 -2.0280E-02 8.1295E-02 -1.6536E-01 2.1574E-01 -1.9266E-01 1.2092E-01
S6 -4.2613E-03 6.9908E-03 -2.8111E-02 6.4153E-02 -9.1332E-02 8.6686E-02 -5.6767E-02
S7 -9.8944E-03 -1.2714E-02 3.3694E-02 -5.7562E-02 6.3813E-02 -4.8036E-02 2.5048E-02
S8 -1.5912E-02 4.4032E-03 -1.8641E-02 3.2718E-02 -3.5583E-02 2.5546E-02 -1.2516E-02
S9 -1.5787E-02 1.3281E-02 -3.0640E-02 3.8729E-02 -3.2466E-02 1.8811E-02 -7.6226E-03
S10 -1.1889E-02 4.7253E-03 -3.3456E-03 8.3887E-04 3.1526E-04 -2.9803E-04 1.0229E-04
S11 -3.6387E-02 1.2238E-02 3.7252E-03 -8.0139E-03 5.2073E-03 -1.9984E-03 5.0630E-04
S12 -5.4039E-02 2.0925E-02 -5.4253E-03 4.1158E-04 2.8833E-04 -1.2303E-04 2.4792E-05
S13 -2.2303E-02 8.7795E-03 -2.7221E-03 4.6899E-04 -5.2930E-05 4.4723E-06 -3.0042E-07
S14 4.2215E-02 -4.8090E-03 -3.3926E-04 1.5595E-04 -2.0630E-05 1.6016E-06 -8.2811E-08
S15 3.3966E-02 -1.2367E-02 2.5783E-03 -3.2372E-04 2.6920E-05 -1.5650E-06 6.5424E-08
S16 -1.9727E-02 1.7917E-03 -1.1715E-04 5.0061E-06 -1.3719E-07 2.4637E-09 -3.3212E-11
TABLE 6-1
Figure BDA0003144093980000122
Figure BDA0003144093980000131
TABLE 6-2
Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 3. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 3, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens according to embodiment 3 can achieve good imaging quality.
Example 4
An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic structural diagram of an optical imaging lens according to embodiment 4 of the present application.
As shown in fig. 7, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from the object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.
Table 7 shows basic parameters of the optical imaging lens of embodiment 4, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 8-1 and 8-2 show the coefficients A of the high-order terms which can be used for the respective aspherical mirrors S1 to S16 in example 4 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 And A 30 Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.
Figure BDA0003144093980000132
Figure BDA0003144093980000141
TABLE 7
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -6.0970E-04 2.5864E-03 -7.1403E-03 1.0888E-02 -1.0595E-02 6.9477E-03 -3.1709E-03
S2 -1.7027E-03 -7.8229E-03 1.4932E-02 -1.9261E-02 1.6833E-02 -1.0183E-02 4.3622E-03
S3 -3.0732E-03 -5.3397E-03 1.1561E-02 -1.4285E-02 1.1849E-02 -6.7386E-03 2.6850E-03
S4 -3.1625E-03 -8.3322E-03 2.5128E-02 -3.6447E-02 3.4135E-02 -2.1848E-02 9.7444E-03
S5 -5.6123E-03 -4.4952E-03 1.5513E-02 -2.3818E-02 2.4921E-02 -1.9569E-02 1.1851E-02
S6 -3.7183E-03 5.7199E-03 -2.0225E-02 4.5534E-02 -6.4212E-02 6.0131E-02 -3.8697E-02
S7 -1.5176E-02 6.5340E-03 -1.8002E-02 3.2383E-02 -4.0136E-02 3.4510E-02 -2.0876E-02
S8 -1.9321E-02 4.4796E-03 -7.6578E-03 8.4140E-03 -6.9852E-03 4.3593E-03 -2.0202E-03
S9 -1.7152E-02 6.8001E-03 -1.0512E-02 1.0057E-02 -7.3754E-03 4.2040E-03 -1.7769E-03
S10 -1.6239E-02 9.1855E-03 -6.1576E-03 2.1667E-03 -2.3638E-04 -1.0438E-04 5.0719E-05
S11 -4.5499E-02 2.1150E-02 -3.2413E-03 -3.8854E-03 3.3272E-03 -1.3620E-03 3.5067E-04
S12 -5.7037E-02 2.5145E-02 -8.1401E-03 1.5044E-03 -3.3986E-05 -5.1979E-05 1.3340E-05
S13 -1.9352E-02 7.8391E-03 -2.3923E-03 3.7087E-04 -2.9703E-05 6.0215E-07 1.3251E-07
S14 4.0434E-02 -5.8920E-03 8.6757E-05 8.0294E-05 -1.2102E-05 9.3809E-07 -4.6365E-08
S15 3.0217E-02 -1.2143E-02 2.5848E-03 -3.2380E-04 2.6703E-05 -1.5378E-06 6.3716E-08
S16 -2.1085E-02 2.0387E-03 -1.3759E-04 5.9497E-06 -1.6528E-07 2.9871E-09 -3.2566E-11
TABLE 8-1
Figure BDA0003144093980000142
Figure BDA0003144093980000151
TABLE 8-2
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 4. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens according to embodiment 4 can achieve good imaging quality.
Example 5
An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic structural diagram of an optical imaging lens according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging lens includes, in order from an object side to an image side along an optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from an object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
Table 9 shows basic parameters of the optical imaging lens of embodiment 5, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 10-1 and 10-2 show the coefficients A of the high-order terms which can be used for the respective aspherical mirrors S1 to S16 in example 5 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 And A 30 Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.
Figure BDA0003144093980000152
Figure BDA0003144093980000161
TABLE 9
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -5.6245E-04 2.3908E-03 -6.6942E-03 1.0277E-02 -1.0049E-02 6.6179E-03 -3.0337E-03
S2 -1.9302E-03 -7.0394E-03 1.2959E-02 -1.6356E-02 1.4063E-02 -8.3522E-03 3.4964E-03
S3 -3.1129E-03 -4.3620E-03 8.6918E-03 -1.0175E-02 8.2126E-03 -4.5748E-03 1.7921E-03
S4 -2.4270E-03 -1.0304E-02 2.8896E-02 -4.1713E-02 3.9221E-02 -2.5198E-02 1.1266E-02
S5 -4.8234E-03 -8.6442E-03 2.7517E-02 -4.6247E-02 5.3390E-02 -4.4793E-02 2.7711E-02
S6 -3.6411E-03 6.0573E-03 -2.1180E-02 4.7296E-02 -6.6124E-02 6.1506E-02 -3.9401E-02
S7 -1.5669E-02 9.0971E-03 -2.6302E-02 4.8662E-02 -6.0630E-02 5.1847E-02 -3.0986E-02
S8 -1.9594E-02 5.1459E-03 -9.0508E-03 1.0366E-02 -8.7854E-03 5.4833E-03 -2.5062E-03
S9 -1.7431E-02 6.9737E-03 -1.0348E-02 9.6037E-03 -6.8832E-03 3.8572E-03 -1.6061E-03
S10 -1.6956E-02 9.7970E-03 -6.4073E-03 2.1750E-03 -2.0242E-04 -1.1965E-04 5.4118E-05
S11 -4.6758E-02 2.2245E-02 -3.8492E-03 -3.5941E-03 3.1889E-03 -1.3084E-03 3.3596E-04
S12 -5.7572E-02 2.5764E-02 -8.3998E-03 1.5683E-03 -4.7801E-05 -4.8863E-05 1.2753E-05
S13 -1.9341E-02 7.9523E-03 -2.4198E-03 3.6713E-04 -2.6860E-05 3.0343E-09 2.0313E-07
S14 4.0419E-02 -5.9962E-03 9.2603E-05 8.3161E-05 -1.2639E-05 9.8249E-07 -4.8528E-08
S15 2.9645E-02 -1.2220E-02 2.6081E-03 -3.2510E-04 2.6589E-05 -1.5161E-06 6.2140E-08
S16 -2.1741E-02 2.1353E-03 -1.4561E-04 6.3324E-06 -1.7712E-07 3.2509E-09 -3.7711E-11
TABLE 10-1
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 9.8388E-04 -2.2643E-04 3.6585E-05 -4.0338E-06 2.8663E-07 -1.1679E-08 2.0270E-10
S2 -1.0399E-03 2.1856E-04 -3.1783E-05 3.0502E-06 -1.7440E-07 4.5167E-09 0.0000E+00
S3 -4.9617E-04 9.5895E-05 -1.2561E-05 1.0548E-06 -5.0840E-08 1.0581E-09 0.0000E+00
S4 -3.5072E-03 7.5023E-04 -1.0704E-04 9.6122E-06 -4.8223E-07 9.9366E-09 0.0000E+00
S5 -1.2577E-02 4.1152E-03 -9.3924E-04 1.4109E-04 -1.2472E-05 4.8941E-07 0.0000E+00
S6 1.7640E-02 -5.5020E-03 1.1692E-03 -1.6090E-04 1.2877E-05 -4.5257E-07 0.0000E+00
S7 1.3006E-02 -3.8041E-03 7.5662E-04 -9.7244E-05 7.2588E-06 -2.3819E-07 0.0000E+00
S8 8.2308E-04 -1.8943E-04 2.9567E-05 -2.9656E-06 1.7183E-07 -4.3588E-09 0.0000E+00
S9 4.7332E-04 -9.5166E-05 1.2575E-05 -1.0309E-06 4.6776E-08 -8.7479E-10 0.0000E+00
S10 -1.0984E-05 1.3150E-06 -9.7328E-08 4.3396E-09 -1.0502E-10 1.0181E-12 0.0000E+00
S11 -5.7789E-05 6.7098E-06 -5.1031E-07 2.3393E-08 -5.0476E-10 -1.2967E-12 1.8322E-13
S12 -1.6916E-06 1.4114E-07 -7.7863E-09 2.8324E-10 -6.4962E-12 8.3960E-14 -4.5208E-16
S13 -2.2145E-08 1.3262E-09 -5.0952E-11 1.2851E-12 -2.0600E-14 1.9014E-16 -7.6592E-19
S14 1.6242E-09 -3.7576E-11 5.9753E-13 -6.3147E-15 4.0696E-17 -1.2432E-19 0.0000E+00
S15 -1.8546E-09 4.0299E-11 -6.2946E-13 6.8679E-15 -4.9533E-17 2.1125E-19 -4.0040E-22
S16 1.3358E-13 7.4720E-15 -2.7835E-16 5.6725E-18 -6.7342E-20 3.6233E-22 0.0000E+00
TABLE 10-2
Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 5. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 5, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens according to embodiment 5 can achieve good imaging quality.
Example 6
An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic structural view of an optical imaging lens according to embodiment 6 of the present application.
As shown in fig. 11, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from the object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.
Table 11 shows basic parameters of the optical imaging lens of embodiment 6, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 12-1 and 12-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S16 in example 6 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 And A 30 Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.
Figure BDA0003144093980000171
Figure BDA0003144093980000181
TABLE 11
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -9.4911E-04 3.9703E-03 -1.0265E-02 1.5342E-02 -1.4873E-02 9.8105E-03 -4.5318E-03
S2 -1.2653E-03 -9.7398E-03 1.8894E-02 -2.4807E-02 2.2054E-02 -1.3596E-02 5.9457E-03
S3 -3.6122E-03 -4.1963E-03 8.6295E-03 -1.0172E-02 8.1951E-03 -4.5673E-03 1.7974E-03
S4 -3.0270E-03 -1.0823E-02 3.0777E-02 -4.4332E-02 4.1390E-02 -2.6335E-02 1.1628E-02
S5 -4.5822E-03 -1.1998E-02 3.8293E-02 -6.7977E-02 8.1604E-02 -6.9359E-02 4.2421E-02
S6 -3.0560E-03 2.9179E-03 -1.2578E-02 3.0809E-02 -4.5087E-02 4.3125E-02 -2.8194E-02
S7 -1.4048E-02 6.6676E-03 -2.0063E-02 3.6492E-02 -4.4564E-02 3.7312E-02 -2.1841E-02
S8 -1.8979E-02 2.6504E-03 -5.5872E-03 6.7376E-03 -5.8171E-03 3.6755E-03 -1.7004E-03
S9 -1.5831E-02 2.1519E-03 -2.9131E-03 1.0720E-03 4.0990E-04 -5.7690E-04 2.8882E-04
S10 -1.2253E-02 4.7954E-03 -2.9353E-03 6.0914E-04 2.8920E-04 -2.3049E-04 7.2271E-05
S11 -3.8384E-02 1.4344E-02 8.7466E-04 -5.4824E-03 3.7069E-03 -1.4063E-03 3.4830E-04
S12 -5.3602E-02 2.1558E-02 -5.9423E-03 6.7006E-04 1.7115E-04 -8.6003E-05 1.7262E-05
S13 -2.1311E-02 7.8280E-03 -2.2110E-03 3.0998E-04 -1.8786E-05 -6.3730E-07 2.2676E-07
S14 4.0279E-02 -5.8047E-03 7.3546E-05 7.9986E-05 -1.1894E-05 9.1748E-07 -4.5312E-08
S15 3.1998E-02 -1.2049E-02 2.4751E-03 -3.0320E-04 2.4582E-05 -1.3952E-06 5.7040E-08
S16 -2.0268E-02 1.8749E-03 -1.2051E-04 4.9509E-06 -1.2999E-07 2.1964E-09 -2.1970E-11
TABLE 12-1
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 1.4867E-03 -3.4687E-04 5.6882E-05 -6.3666E-06 4.5890E-07 -1.8931E-08 3.3138E-10
S2 -1.8641E-03 4.1893E-04 -6.6710E-05 7.3263E-06 -5.2612E-07 2.2151E-08 -4.1242E-10
S3 -5.0076E-04 9.7341E-05 -1.2803E-05 1.0780E-06 -5.2026E-08 1.0837E-09 0.0000E+00
S4 -3.5667E-03 7.5049E-04 -1.0524E-04 9.2887E-06 -4.5833E-07 9.3136E-09 0.0000E+00
S5 -1.8698E-02 5.8755E-03 -1.2805E-03 1.8341E-04 -1.5480E-05 5.8180E-07 0.0000E+00
S6 1.2842E-02 -4.0707E-03 8.7919E-04 -1.2307E-04 1.0033E-05 -3.6003E-07 0.0000E+00
S7 8.9838E-03 -2.5761E-03 5.0261E-04 -6.3399E-05 4.6450E-06 -1.4952E-07 0.0000E+00
S8 5.6260E-04 -1.2932E-04 1.9944E-05 -1.9542E-06 1.0926E-07 -2.6382E-09 0.0000E+00
S9 -9.3384E-05 2.2153E-05 -3.8225E-06 4.4042E-07 -2.9482E-08 8.5475E-10 0.0000E+00
S10 -1.3158E-05 1.5061E-06 -1.0953E-07 4.8847E-09 -1.2036E-10 1.2227E-12 0.0000E+00
S11 -5.8683E-05 6.7205E-06 -5.0594E-07 2.3015E-08 -4.9499E-10 -1.1099E-12 1.7306E-13
S12 -2.0898E-06 1.6677E-07 -8.9733E-09 3.2144E-10 -7.2931E-12 9.3316E-14 -4.9495E-16
S13 -2.1728E-08 1.2317E-09 -4.5853E-11 1.1334E-12 -1.7919E-14 1.6362E-16 -6.5197E-19
S14 1.5243E-09 -3.5577E-11 5.7232E-13 -6.1336E-15 4.0197E-17 -1.2537E-19 0.0000E+00
S15 -1.6998E-09 3.6886E-11 -5.7526E-13 6.2619E-15 -4.4985E-17 1.9048E-19 -3.5582E-22
S16 -3.7278E-15 7.0248E-15 -2.2837E-16 4.4947E-18 -5.2369E-20 2.7758E-22 0.0000E+00
TABLE 12-2
Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 6. Fig. 12C shows a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values corresponding to different image heights. Fig. 12D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 6, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens according to embodiment 6 can achieve good imaging quality.
Example 7
An optical imaging lens according to embodiment 7 of the present application is described below with reference to fig. 13 to 14D. Fig. 13 is a schematic structural view showing an optical imaging lens according to embodiment 7 of the present application.
As shown in fig. 13, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. The filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from the object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.
Table 13 shows basic parameters of the optical imaging lens of embodiment 7, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 14-1 and 14-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S16 in example 7 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 And A 30 Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.
Figure BDA0003144093980000191
Figure BDA0003144093980000201
Watch 13
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -2.1890E-04 1.1007E-03 -4.4840E-03 8.5567E-03 -9.8719E-03 7.4038E-03 -3.7716E-03
S2 -2.7196E-03 -6.7921E-03 1.7243E-02 -2.6544E-02 2.5940E-02 -1.7015E-02 7.7699E-03
S3 -6.3521E-03 1.8720E-03 1.4323E-03 -4.8665E-03 5.7410E-03 -3.9336E-03 1.7663E-03
S4 -4.9752E-03 -5.5347E-03 2.3579E-02 -3.7733E-02 3.6976E-02 -2.4166E-02 1.0855E-02
S5 -4.5541E-03 -1.2231E-02 4.5693E-02 -8.8532E-02 1.1104E-01 -9.5680E-02 5.8005E-02
S6 -3.2536E-03 2.7377E-03 -9.2249E-03 2.0639E-02 -3.0020E-02 2.9692E-02 -2.0456E-02
S7 -1.4137E-02 7.0821E-03 -2.2553E-02 4.1859E-02 -5.0798E-02 4.1694E-02 -2.3802E-02
S8 -1.7963E-02 5.3711E-03 -1.6343E-02 2.4633E-02 -2.3395E-02 1.4838E-02 -6.5040E-03
S9 -1.4600E-02 5.8910E-03 -1.6677E-02 2.2403E-02 -1.9127E-02 1.1050E-02 -4.4238E-03
S10 -1.0781E-02 1.6517E-03 2.6219E-04 -1.3233E-03 1.0470E-03 -4.3410E-04 1.1122E-04
S11 -3.4103E-02 5.7031E-03 1.0324E-02 -1.1882E-02 6.5979E-03 -2.3063E-03 5.4460E-04
S12 -5.2248E-02 1.9411E-02 -4.4627E-03 1.3324E-05 3.7959E-04 -1.3335E-04 2.4881E-05
S13 -2.2074E-02 8.8578E-03 -2.9370E-03 5.7087E-04 -7.3879E-05 6.8362E-06 -4.5872E-07
S14 4.0185E-02 -5.8189E-03 1.1504E-04 6.9563E-05 -1.0688E-05 8.3586E-07 -4.1766E-08
S15 3.2645E-02 -1.1675E-02 2.3503E-03 -2.8526E-04 2.3069E-05 -1.3142E-06 5.4257E-08
S16 -1.8302E-02 1.5926E-03 -9.6824E-05 3.8041E-06 -9.5482E-08 1.5659E-09 -2.0225E-11
TABLE 14-1
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 1.3362E-03 -3.3191E-04 5.7423E-05 -6.7467E-06 5.0991E-07 -2.2138E-08 4.1276E-10
S2 -2.5145E-03 5.7908E-04 -9.4071E-05 1.0511E-05 -7.6664E-07 3.2759E-08 -6.1903E-10
S3 -5.3824E-04 1.1141E-04 -1.5341E-05 1.3380E-06 -6.6503E-08 1.4237E-09 0.0000E+00
S4 -3.3700E-03 7.1576E-04 -1.0117E-04 8.9993E-06 -4.4838E-07 9.2590E-09 0.0000E+00
S5 -2.4884E-02 7.4816E-03 -1.5281E-03 1.9762E-04 -1.3558E-05 1.8869E-07 2.0857E-08
S6 9.8881E-03 -3.3255E-03 7.5896E-04 -1.1163E-04 9.5051E-06 -3.5446E-07 0.0000E+00
S7 9.5473E-03 -2.6765E-03 5.1241E-04 -6.3674E-05 4.6147E-06 -1.4753E-07 0.0000E+00
S8 1.9948E-03 -4.2588E-04 6.1818E-05 -5.8004E-06 3.1641E-07 -7.6009E-09 0.0000E+00
S9 1.2356E-03 -2.3885E-04 3.1180E-05 -2.6134E-06 1.2656E-07 -2.6850E-09 0.0000E+00
S10 -1.8539E-05 2.0369E-06 -1.4563E-07 6.4706E-09 -1.6016E-10 1.6430E-12 0.0000E+00
S11 -8.8798E-05 9.9296E-06 -7.3489E-07 3.3054E-08 -7.0698E-10 -1.5332E-12 2.4588E-13
S12 -2.9553E-06 2.3597E-07 -1.2821E-08 4.6610E-10 -1.0762E-11 1.4027E-13 -7.5714E-16
S13 2.2013E-08 -7.3384E-10 1.6184E-11 -2.1516E-13 1.3822E-15 -1.5507E-18 0.0000E+00
S14 1.4215E-09 -3.3577E-11 5.4684E-13 -5.9396E-15 3.9559E-17 -1.2612E-19 0.0000E+00
S15 -1.6411E-09 3.6295E-11 -5.7852E-13 6.4467E-15 -4.7426E-17 2.0527E-19 -3.8933E-22
S16 4.9424E-13 -2.3476E-14 9.3836E-16 -2.6223E-17 4.8490E-19 -5.3527E-21 2.6880E-23
TABLE 14-2
Fig. 14A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 7, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 14B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 7. Fig. 14C shows a distortion curve of the optical imaging lens of embodiment 7, which represents distortion magnitude values corresponding to different image heights. Fig. 14D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 7, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 14A to 14D, the optical imaging lens according to embodiment 7 can achieve good imaging quality.
Further, in embodiments 1 to 7, the focal length values f1 to f8 of the respective lenses, the effective focal length f of the optical imaging lens, the distance TTL along the optical axis from the object side surface of the first lens of the optical imaging lens to the imaging surface of the optical imaging lens, and the half ImgH of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens are as shown in table 15.
Parameters/embodiments 1 2 3 4 5 6 7
f1(mm) 10.38 9.91 9.81 9.43 9.25 9.50 9.85
f2(mm) -15.37 -15.82 -16.33 -16.86 -16.63 -16.89 -17.78
f3(mm) 18.67 16.96 15.97 18.16 18.62 17.31 17.63
f4(mm) 775.44 -48.79 -123.20 -122.98 -130.26 -124.49 -96.48
f5(mm) 41974.19 60.27 134.94 643.56 719.53 198.15 152.90
f6(mm) -34.62 -26.58 -39.98 -48.82 -49.22 -42.96 -42.80
f7(mm) 4.92 4.08 4.19 4.47 4.50 4.42 4.41
f8(mm) -4.39 -3.77 -3.56 -3.69 -3.70 -3.62 -3.68
f(mm) 9.79 9.44 9.08 9.68 9.64 9.50 9.63
TTL(mm) 11.00 10.60 10.15 10.51 10.47 10.40 10.52
ImgH(mm) 8.15 8.15 8.12 8.12 8.12 8.12 8.12
Table 15 each of the conditional expressions in example 1 to example 7 satisfies the condition shown in table 16.
Conditions/examples 1 2 3 4 5 6 7
(BFL×ImgH)/TTL(mm) 2.04 2.23 2.15 2.16 2.14 2.11 2.17
f×tan(FOV/2)(mm) 8.05 8.01 8.02 8.02 8.02 8.01 8.04
f1/(R1+R2) 0.88 0.95 1.04 0.96 0.93 0.98 1.04
(f2-f6)/f3 1.03 0.63 1.48 1.76 1.75 1.51 1.42
(f7-f8)/f 0.95 0.83 0.85 0.84 0.85 0.85 0.84
(R5+R6)/(R3+R4) 1.26 1.34 1.32 1.17 1.13 1.24 1.30
(R13-R14)/(R13+R14) 3.27 2.31 2.28 2.03 2.01 2.16 2.20
(R16-R15)/f 1.03 0.90 0.89 0.86 0.87 0.86 0.88
∑CT/BFL 1.90 1.76 1.89 1.83 1.85 1.89 1.83
(DT81+DT82)/ImgH 1.27 1.36 1.35 1.32 1.33 1.34 1.33
f123/(CT1+CT2+CT3) 5.60 5.10 4.77 4.93 4.92 4.93 5.00
SAG72/SAG71 1.61 1.60 1.59 1.54 1.52 1.56 1.62
(SAG61+SAG62)/SAG81 0.80 1.18 1.21 1.15 1.12 1.16 1.19
ET8/ET7 2.01 1.03 1.25 1.29 1.12 1.37 1.67
TABLE 16
The present application also provides an imaging Device, which is provided with an electron sensing element to form an image, wherein the electron sensing element may be a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of protection covered by the present application is not limited to the embodiments with a specific combination of the features described above, but also covers other embodiments with any combination of the features described above or their equivalents without departing from the scope of the present application. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (14)

1. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:
a first lens having a positive optical power;
a second lens having a negative optical power;
a third lens having a positive optical power;
a fourth lens having a focal power;
a fifth lens having a positive optical power;
a sixth lens having a negative optical power;
a seventh lens having positive refractive power, an image side surface of which is convex; and
an eighth lens having a negative optical power,
the optical imaging lens satisfies:
1.6＜∑CT/BFL＜2.1，
wherein Σ CT is a sum of center thicknesses of the respective first to eighth lenses on the optical axis, BFL is a distance along the optical axis from an image side surface of the eighth lens to an imaging surface of the optical imaging lens,
the number of lenses having power in the optical imaging lens is eight.
2. The optical imaging lens of claim 1, wherein the effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens satisfy:
7.5mm＜f×tan(FOV/2)＜8.5mm。
3. the optical imaging lens of claim 2, wherein the effective focal length f1 of the first lens, the radius of curvature R1 of the object side surface of the first lens, and the radius of curvature R2 of the image side surface of the first lens satisfy:
0.7＜f1/(R1+R2)＜1.3。
4. the optical imaging lens of claim 3, wherein a distance BFL along the optical axis from the image side surface of the eighth lens element to the imaging surface of the optical imaging lens, a half ImgH of a diagonal length of an effective pixel area on the imaging surface, and a distance TTL along the optical axis from the object side surface of the first lens element to the imaging surface satisfy:
1.8mm＜(BFL×ImgH)/TTL＜3.0mm。
5. the optical imaging lens of claim 1, wherein the effective focal length f2 of the second lens, the effective focal length f6 of the sixth lens and the effective focal length f3 of the third lens satisfy:
0.5＜(f2-f6)/f3＜1.9。
6. the optical imaging lens of claim 1, wherein the effective focal length f7 of the seventh lens, the effective focal length f8 of the eighth lens and the effective focal length f of the optical imaging lens satisfy:
0.7＜(f7-f8)/f＜1.1。
7. the optical imaging lens of claim 1, wherein the radius of curvature R5 of the object-side surface of the third lens, the radius of curvature R6 of the image-side surface of the third lens, the radius of curvature R3 of the object-side surface of the second lens, and the radius of curvature R4 of the image-side surface of the second lens satisfy:
1.0＜(R5+R6)/(R3+R4)＜1.5。
8. the optical imaging lens of claim 1, wherein the radius of curvature R13 of the object-side surface of the seventh lens and the radius of curvature R14 of the image-side surface of the seventh lens satisfy:
1.8＜(R13-R14)/(R13+R14)＜3.4。
9. the optical imaging lens according to any one of claims 1 to 8, wherein a curvature radius R16 of an image side surface of the eighth lens, a curvature radius R15 of an object side surface of the eighth lens, and an effective focal length f of the optical imaging lens satisfy:
0.7＜(R16-R15)/f＜1.2。
10. the optical imaging lens according to any one of claims 1 to 8, wherein the maximum effective radius DT81 of the object side surface of the eighth lens, the maximum effective radius DT82 of the image side surface of the eighth lens, and a half ImgH of a diagonal length of an effective pixel area on the imaging surface satisfy:
1.1＜(DT81+DT82)/ImgH＜1.5。
11. the optical imaging lens according to any one of claims 1 to 8, characterized in that a combined focal length f123 of the first lens, the second lens and the third lens, a central thickness CT1 of the first lens on the optical axis and a central thickness CT2 of the second lens on the optical axis and a central thickness CT3 of the third lens on the optical axis satisfy:
4.5＜f123/(CT1+CT2+CT3)＜5.8。
12. the optical imaging lens according to any one of claims 1 to 8, wherein an on-axis distance from an intersection point of an image-side surface and an optical axis of the seventh lens to an effective radius vertex of the image-side surface of the seventh lens, SAG72, and an intersection point of an object-side surface and an optical axis of the seventh lens to an effective radius vertex of an object-side surface of the seventh lens, SAG71 satisfy:
1.4＜SAG72/SAG71＜1.8。
13. the optical imaging lens according to any one of claims 1 to 8, wherein an on-axis distance from an intersection point of an object-side surface and an optical axis of the sixth lens to an effective radius vertex of the object-side surface of the sixth lens to SAG61, an on-axis distance from an intersection point of an image-side surface and an optical axis of the sixth lens to an effective radius vertex of an image-side surface of the sixth lens to SAG62, and an on-axis distance from an intersection point of an object-side surface and an optical axis of the eighth lens to an effective radius vertex of an object-side surface of the eighth lens to SAG81 satisfy:
0.7＜(SAG61+SAG62)/SAG81＜1.5。
14. the optical imaging lens according to any one of claims 1 to 8, characterized in that the edge thickness ET8 of the eighth lens and the edge thickness ET7 of the seventh lens satisfy:
0.9＜ET8/ET7＜2.2。
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