CN113031214B - Optical imaging lens - Google Patents
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- CN113031214B CN113031214B CN202110294950.XA CN202110294950A CN113031214B CN 113031214 B CN113031214 B CN 113031214B CN 202110294950 A CN202110294950 A CN 202110294950A CN 113031214 B CN113031214 B CN 113031214B
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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
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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
- G02B13/18—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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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 with negative focal power, wherein the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; the fourth lens with positive focal power has a convex object-side surface and a convex image-side surface; and a fifth lens having a negative optical power. The distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis, the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens and the maximum incidence angle CRamax of the main ray incident electron photosensitive component satisfy the following conditions: 5 < TTL/(ImgH × tan (CRAMax)) < 11.
Description
Technical Field
The present application relates to the field of optical elements, and more particularly, to an optical imaging lens.
Background
In recent years, with the rapid development of intelligent terminals such as mobile phones and tablets, the photographing function is becoming one of the highlights of flagship series released by various large-brand mobile phone manufacturers. The hardware part of the photographing function mainly comprises a lens for imaging and a chip for receiving light. Most of chips used in a mobile phone are CMOS (Complementary Metal-Oxide Semiconductor), i.e., Complementary Metal-Oxide Semiconductor image sensors, the CMOS is composed of a plurality of pixels, each pixel has a micro-lens, and the micro-lens has a main function of focusing light from different angles on the pixel. However, as the angle of the pixel location increases, some of the light may not be focused on the pixel, resulting in light loss and a decrease in pixel response. If the cra (Chief Ray angle) of the lens does not match the design of the sensor's micro-lens, the intensity of the light transmitted through the sensor will become less than ideal. Therefore, in the same case, when the CRA of the shot is small, the reception response rate of the chip is high.
Therefore, in view of the above problems, it is desirable to provide an optical imaging lens having a small CRA and good imaging quality, which is applicable to portable electronic products.
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 an optical power; a third lens with negative focal power, wherein the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; the fourth lens with positive focal power has a convex object-side surface and a convex image-side surface; and a fifth lens having a negative optical power. The distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis, the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens and the maximum incidence angle CRamax of the main ray incident electron photosensitive component can satisfy the following conditions: 5 < TTL/(ImgH × tan (CRAMax)) < 11.
In one embodiment, the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens satisfy: f1/f is more than 1.4 and less than 2.2.
In one embodiment, the effective focal length f3 of the third lens, the radius of curvature R5 of the object-side surface of the third lens, and the radius of curvature R6 of the image-side surface of the third lens may satisfy: 1.1 < f3/(R5+ R6) < 3.1.
In one embodiment, the radius of curvature R7 of the object-side surface of the fourth lens, the radius of curvature R8 of the image-side surface of the fourth lens, and the effective focal length f4 of the fourth lens may satisfy: 2.0 < (R7-R8)/f4 < 2.5.
In one embodiment, ImgH, which is half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, and the effective focal length f5 of the fifth lens may satisfy: -1.5 < ImgH/f5 < -0.5.
In one embodiment, the radius of curvature R2 of the image-side surface of the first lens and the radius of curvature R10 of the image-side surface of the fifth lens may satisfy: -4.7 < R2/R10 < -2.2.
In one embodiment, the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the separation distance T12 of the first lens and the second lens on the optical axis, and the separation distance T23 of the second lens and the third lens on the optical axis may satisfy: 0.7 < (CT1+ CT2)/(T12+ T23) < 1.6.
In one embodiment, the central thickness CT4 of the fourth lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the central thickness CT5 of the fifth lens on the optical axis may satisfy: 1.3 < CT4/(CT3+ CT5) < 1.9.
In one embodiment, the effective half aperture DT31 of the object side surface of the third lens and the effective half aperture DT11 of the object side surface of the first lens may satisfy: 1.5 < DT31/DT11 < 1.8.
In one embodiment, the effective half aperture DT52 of the image-side surface of the fifth lens and the effective half aperture DT12 of the image-side surface of the first lens satisfy: 2.5 < DT52/DT12 < 2.9.
In one embodiment, the combined focal length f23 of the second lens and the third lens and the on-axis distance SL from the diaphragm to the imaging surface of the optical imaging lens can satisfy: -1.3 < f23/SL < -0.4.
In one embodiment, the combined focal length f45 of the fourth lens and the fifth lens, the edge thickness ET4 of the fourth lens, and the edge thickness ET5 of the fifth lens may satisfy: 1.9 < f45/(ET4+ ET5) < 3.6.
In one embodiment, the edge thickness ET3 of the third lens and the central thickness CT3 of the third lens on the optical axis may satisfy: 1.6 < ET3/CT3 < 3.3.
In one embodiment, an on-axis distance SAG31 from an intersection point of an object-side surface of the third lens and the optical axis to an effective radius vertex of the object-side surface of the third lens, an on-axis distance SAG32 from an intersection point of an image-side surface of the third lens and the optical axis to an effective radius vertex of the image-side surface of the third lens, an on-axis distance SAG51 from an intersection point of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens, and an on-axis distance SAG52 from an intersection point of an image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens may satisfy: -1.9 < (SAG31+ SAG32)/(SAG51+ SAG52) < -1.0.
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 an optical power; a third lens with negative focal power, wherein the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; the fourth lens with positive focal power has a convex object-side surface and a convex image-side surface; and a fifth lens having a negative optical power. The effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens satisfy: f1/f is more than 1.4 and less than 2.2.
In one embodiment, the effective focal length f3 of the third lens, the radius of curvature of the object-side surface R5 of the third lens, and the radius of curvature of the image-side surface R6 of the third lens may satisfy: 1.1 < f3/(R5+ R6) < 3.1.
In one embodiment, a distance TTL along the optical axis from the object-side surface of the first lens element to the imaging surface of the optical imaging lens, a half ImgH of a diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, and a maximum incidence angle CRAmax of the chief ray incident on the electron sensing assembly may satisfy: 5 < TTL/(ImgH × tan (CRAMax)) < 11.
In one embodiment, the radius of curvature R7 of the object-side surface of the fourth lens, the radius of curvature R8 of the image-side surface of the fourth lens, and the effective focal length f4 of the fourth lens may satisfy: 2.0 < (R7-R8)/f4 < 2.5.
In one embodiment, ImgH, which is half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, and the effective focal length f5 of the fifth lens may satisfy: -1.5 < ImgH/f5 < -0.5.
In one embodiment, the radius of curvature R2 of the image-side surface of the first lens and the radius of curvature R10 of the image-side surface of the fifth lens may satisfy: -4.7 < R2/R10 < -2.2.
In one embodiment, the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the separation distance T12 of the first lens and the second lens on the optical axis, and the separation distance T23 of the second lens and the third lens on the optical axis may satisfy: 0.7 < (CT1+ CT2)/(T12+ T23) < 1.6.
In one embodiment, the central thickness CT4 of the fourth lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the central thickness CT5 of the fifth lens on the optical axis may satisfy: 1.3 < CT4/(CT3+ CT5) < 1.9.
In one embodiment, the effective half aperture DT31 of the object side surface of the third lens and the effective half aperture DT11 of the object side surface of the first lens may satisfy: 1.5 < DT31/DT11 < 1.8.
In one embodiment, the effective half aperture DT52 of the image-side surface of the fifth lens and the effective half aperture DT12 of the image-side surface of the first lens satisfy: 2.5 < DT52/DT12 < 2.9.
In one embodiment, the combined focal length f23 of the second lens and the third lens and the on-axis distance SL from the diaphragm to the imaging surface of the optical imaging lens can satisfy: -1.3 < f23/SL < -0.4.
In one embodiment, the combined focal length f45 of the fourth lens and the fifth lens, the edge thickness ET4 of the fourth lens, and the edge thickness ET5 of the fifth lens may satisfy: 1.9 < f45/(ET4+ ET5) < 3.6.
In one embodiment, the edge thickness ET3 of the third lens and the central thickness CT3 of the third lens on the optical axis may satisfy: 1.6 < ET3/CT3 < 3.3.
In one embodiment, an on-axis distance SAG31 from an intersection point of an object-side surface of the third lens and the optical axis to an effective radius vertex of the object-side surface of the third lens, an on-axis distance SAG32 from an intersection point of an image-side surface of the third lens and the optical axis to an effective radius vertex of the image-side surface of the third lens, an on-axis distance SAG51 from an intersection point of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens, and an on-axis distance SAG52 from an intersection point of an image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens may satisfy: -1.9 < (SAG31+ SAG32)/(SAG51+ SAG52) < -1.0.
The optical imaging lens has the advantages that the five-piece type lens framework is adopted, and the optical imaging lens can have at least one beneficial effect of small CRA (cross-cut line) and good imaging quality through reasonable focal power distribution and optimization of optical parameters.
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; and
fig. 12A to 12D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 6.
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, five lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The five lenses are arranged in sequence from the object side to the image side along the 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 negative optical power; the fourth lens may have a positive optical power; the fifth lens may have a negative optical power. By reasonably controlling the focal power of the five lenses, the optical system can better correct the primary aberration, so that the system has good imaging quality and lower process sensitivity, and is easy to perform injection molding processing and assembled with higher yield.
In an exemplary embodiment, the object side surface of the third lens may be concave, and the image side surface may be convex; the object side surface of the fourth lens element can be convex, and the image side surface can be convex. By reasonably controlling the surface type collocation of each lens, the imaging quality of the lens can be favorably improved.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 5 < TTL/(ImgH × tan (CRAmax)) < 11, where TTL is a distance along an optical axis from an object side surface of the first lens to an imaging surface of the optical imaging lens, ImgH is a half of a diagonal length of an effective pixel area on the imaging surface of the optical imaging lens, and CRAmax is a maximum incident angle of a principal ray incident on the electron photosensitive element. By controlling the distance from the object side surface of the first 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 of the optical imaging lens and the maximum incident angle of the main ray incident on the electronic photosensitive component satisfy 5 < TTL/(Imgh × tan (CRamax)) < 11, the maximum incident angle can be controlled in a smaller range, and the maximum incident angle has a larger effective pixel area. More specifically, TTL, ImgH, and CRAmax can satisfy 7 < TTL/(ImgH × tan (CRAmax)) < 9.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.4 < f1/f < 2.2, where f1 is an effective focal length of the first lens, and f is an effective focal length of the optical imaging lens. The ratio of the effective focal length of the first lens to the effective focal length of the optical imaging lens is controlled within the range, so that light on the side face of an object can be converged in the first lens, the aperture of the first lens is reduced, and the lens structure is facilitated to be ultra-thin while having an ultra-large image surface. More specifically, f1 and f can satisfy 1.45 < f1/f < 2.1.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.1 < f3/(R5+ R6) < 3.1, where f3 is an effective focal length of the third lens, R5 is a radius of curvature of an object-side surface of the third lens, and R6 is a radius of curvature of an image-side surface of the third lens. By controlling the ratio of the effective focal length of the third lens to the sum of the curvature radius of the object-side surface of the third lens and the curvature radius of the image-side surface of the third lens to be in the range, the aberration contribution of the third lens to the optical imaging lens can be favorably and reasonably adjusted. More specifically, f3, R5 and R6 may satisfy 1.2 < f3/(R5+ R6) < 3.0.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 2.0 < (R7-R8)/f4 < 2.5, where R7 is a radius of curvature of an object-side surface of the fourth lens, R8 is a radius of curvature of an image-side surface of the fourth lens, and f4 is an effective focal length of the fourth lens. By controlling the ratio of the difference between the curvature radius of the object side surface of the fourth lens element and the curvature radius of the image side surface of the fourth lens element to the effective focal length of the fourth lens element within the range, the aberration contribution of the fourth lens element to the optical imaging lens can be reasonably adjusted. More specifically, R7, R8 and f4 may satisfy 2.1 < (R7-R8)/f4 < 2.4.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-1.5 < ImgH/f5 < -0.5, where ImgH is half the diagonal length of an effective pixel region on an imaging plane of the optical imaging lens, and f5 is an effective focal length of the fifth lens. By controlling the ratio of half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens to the effective focal length of the fifth lens within the range, the aberration can be favorably reduced. More specifically, ImgH and f5 may satisfy-1.4 < ImgH/f5 < -0.5.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-4.7 < R2/R10 < -2.2, where R2 is a radius of curvature of an image-side surface of the first lens and R10 is a radius of curvature of an image-side surface of the fifth lens. By controlling the ratio of the curvature radius of the image side surface of the first lens to the curvature radius of the image side surface of the fifth lens to be in the range, the aberration contributions of the first lens and the fifth lens to the optical imaging lens can be favorably and reasonably distributed. More specifically, R2 and R10 may satisfy-4.6 < R2/R10 < -2.3.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.7 < (CT1+ CT2)/(T12+ T23) < 1.6, where CT1 is a central thickness of the first lens on the optical axis, CT2 is a central thickness of the second lens on the optical axis, T12 is a spaced distance of the first lens and the second lens on the optical axis, and T23 is a spaced distance of the second lens and the third lens on the optical axis. The ratio of the sum of the central thickness of the first lens on the optical axis to the central thickness of the second lens on the optical axis to the sum of the distance between the first lens and the second lens on the optical axis to the distance between the second lens and the third lens on the optical axis is controlled within the range, so that the influence of the overlarge thickness of the lenses on the spatial distribution of the lenses can be favorably avoided, and the assembly of the optical imaging lens is facilitated. More specifically, CT1, CT2, T12, and T23 may satisfy 0.8 < (CT1+ CT2)/(T12+ T23) < 1.5.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.3 < CT4/(CT3+ CT5) < 1.9, where CT4 is a central thickness of the fourth lens on the optical axis, CT3 is a central thickness of the third lens on the optical axis, and CT5 is a central thickness of the fifth lens on the optical axis. By controlling the ratio of the central thickness of the fourth lens on the optical axis to the sum of the central thickness of the third lens on the optical axis and the central thickness of the fifth lens on the optical axis to be within the range, the influence of the overlarge thickness of the lenses on the spatial distribution of the lenses can be favorably avoided, and the assembly of the optical imaging lens is facilitated. More specifically, CT4, CT3, and CT5 may satisfy 1.4 < CT4/(CT3+ CT5) < 1.8.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.5 < DT31/DT11 < 1.8, where DT31 is an effective half aperture of an object side surface of the third lens, and DT11 is an effective half aperture of an object side surface of the first lens. By controlling the ratio of the effective half aperture of the object side surface of the third lens to the effective half aperture of the object side surface of the first lens within the range, the spatial distribution of the lens can be more reasonable. More specifically, DT31 and DT11 may satisfy 1.6 < DT31/DT11 < 1.8.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 2.5 < DT52/DT12 < 2.9, where DT52 is an effective half aperture of an image side surface of the fifth lens, and DT12 is an effective half aperture of an image side surface of the first lens. By controlling the ratio of the effective half aperture of the image side surface of the fifth lens to the effective half aperture of the image side surface of the first lens within the range, the large image surface can be realized, and the spatial distribution of the optical imaging lens is more reasonable. More specifically, DT52 and DT12 may satisfy 2.6 < DT52/DT12 < 2.8.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-1.3 < f23/SL < -0.4, where f23 is a composite focal length of the second lens and the third lens, and SL is an on-axis distance of a diaphragm to an imaging surface of the optical imaging lens. By controlling the ratio of the combined focal length of the second lens and the third lens to the on-axis distance from the diaphragm to the imaging surface of the optical imaging lens to be within the range, the aberration can be favorably reduced. More specifically, f23 and SL may satisfy-1.25 < f23/SL < -0.5.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.9 < f45/(ET4+ ET5) < 3.6, where f45 is a composite focal length of the fourth lens and the fifth lens, ET4 is an edge thickness of the fourth lens, and ET5 is an edge thickness of the fifth lens. By controlling the ratio of the combined focal length of the fourth lens and the fifth lens to the sum of the edge thickness of the fourth lens and the edge thickness of the fifth lens to be within the range, the overall spatial structure layout of the lens can be facilitated. More specifically, f45, ET4 and ET5 may satisfy 2 < f45/(ET4+ ET5) < 3.5.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.6 < ET3/CT3 < 3.3, where ET3 is the edge thickness of the third lens, and CT3 is the center thickness of the third lens on the optical axis. By controlling the ratio of the edge thickness of the third lens to the center thickness of the third lens on the optical axis within this range, the lens can be favorably formed. More specifically, ET3 and CT3 satisfy 1.7 < ET3/CT3 < 3.2.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-1.9 < (SAG31+ SAG32)/(SAG51+ SAG52) < -1.0, where SAG31 is an on-axis distance from an intersection of an object-side surface of the third lens and an optical axis to an effective radius vertex of the object-side surface of the third lens, SAG32 is an on-axis distance from an intersection of an image-side surface of the third lens and the optical axis to an effective radius vertex of the image-side surface of the third lens, SAG51 is an on-axis distance from an intersection of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens, and SAG52 is an on-axis distance from an intersection of the image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens. The ratio of the sum of the axial distance from the intersection point of the object side surface of the third lens and the optical axis to the effective radius peak of the object side surface of the third lens, the axial distance from the intersection point of the image side surface of the third lens and the optical axis to the effective radius peak of the image side surface of the third lens, the axial distance from the intersection point of the object side surface of the fifth lens and the optical axis to the effective radius peak of the object side surface of the fifth lens, and the axial distance from the intersection point of the image side surface of the fifth lens and the optical axis to the effective radius peak of the image side surface of the fifth lens is controlled within the range, so that the bending degree of the lenses can be favorably limited, and the processing and molding difficulty of the lenses can be reduced. More specifically, SAG31, SAG32, SAG51 and SAG52 may satisfy-1.8 < (SAG31+ SAG32)/(SAG51+ SAG52) < -1.1.
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, five 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 each lens and the like, the lens can be effectively ensured to have the characteristics of small CRA, high imaging quality and the like.
In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror, that is, at least one of the object-side surface of the first lens to the image-side surface of the fifth lens is an aspherical mirror. 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, and the fifth lens is an aspheric mirror surface. Optionally, each of the first, second, third, fourth, and fifth lenses has an object-side surface and an image-side surface that are aspheric mirror surfaces.
However, it will be appreciated by those skilled in the art that the number of lenses constituting an optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although five lenses are exemplified in the embodiment, the optical imaging lens is not limited to include five 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, in order from an object side to an image side along an optical axis, comprises: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, and filter E6.
The first lens element E1 has positive power, and has a concave object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from an object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.
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).
TABLE 1
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 to the fifth lens E5 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:
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 is the paraxial curvature of the aspheric surface, c being 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 and Table 3 below show the coefficients A of the high-order terms that can be used for the aspherical mirror surfaces S1 to S10 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 | -6.3112E-02 | -1.6885E-02 | -3.4390E-02 | 2.1812E-01 | -8.2019E-01 | 1.6594E+00 | -1.8725E+00 |
| S2 | -8.6599E-02 | 2.6431E-02 | -1.1876E-01 | 2.5885E-01 | -3.5226E-01 | 2.9395E-01 | -1.4853E-01 |
| S3 | -6.1835E-02 | 1.8927E-02 | -3.1852E-02 | 3.2444E-02 | -1.1646E-02 | -1.2628E-03 | 2.0844E-03 |
| S4 | -4.6327E-02 | -1.4342E-02 | 3.2875E-02 | -8.3594E-02 | 9.7608E-02 | -5.7261E-02 | 1.7940E-02 |
| S5 | 5.4166E-01 | -7.3064E-01 | 1.3937E+00 | -2.4509E+00 | 2.9004E+00 | -2.2085E+00 | 1.0967E+00 |
| S6 | 1.6239E-01 | 1.1652E-01 | -1.7521E-01 | -5.2983E-03 | 1.3587E-01 | -1.1345E-01 | 4.7900E-02 |
| S7 | -2.0308E-01 | 4.0012E-01 | -5.3018E-01 | 5.0922E-01 | -3.6639E-01 | 1.9825E-01 | -8.0584E-02 |
| S8 | 2.3246E-02 | 1.5745E-02 | -2.1384E-02 | 1.1759E-02 | 2.4023E-03 | -9.7926E-03 | 7.9090E-03 |
| S9 | 7.7092E-02 | -2.8117E-02 | 3.3860E-03 | -1.3951E-03 | 5.5501E-04 | -4.0398E-05 | -9.3771E-06 |
| S10 | -1.0695E-01 | 1.2700E-01 | -8.9500E-02 | 3.3784E-02 | -5.0823E-03 | -1.3468E-03 | 9.7343E-04 |
TABLE 2
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 1.0993E+00 | -2.6200E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | 4.0495E-02 | -4.3665E-03 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | -5.7117E-04 | 5.4661E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | -2.8964E-03 | 1.9089E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -3.5537E-01 | 7.2731E-02 | -8.5567E-03 | 4.4177E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -1.2024E-02 | 1.8211E-03 | -1.5448E-04 | 5.6606E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 2.4518E-02 | -5.5371E-03 | 9.1287E-04 | -1.0659E-04 | 8.3422E-06 | -3.9233E-07 | 8.3777E-09 |
| S8 | -3.5603E-03 | 1.0288E-03 | -1.9869E-04 | 2.5607E-05 | -2.1184E-06 | 1.0188E-07 | -2.1670E-09 |
| S9 | -3.2752E-06 | 2.4211E-06 | -5.4400E-07 | 6.4928E-08 | -4.4678E-09 | 1.6829E-10 | -2.7016E-12 |
| S10 | -2.7697E-04 | 4.8528E-05 | -5.6633E-06 | 4.4287E-07 | -2.2355E-08 | 6.5944E-10 | -8.6424E-12 |
TABLE 3
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: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, and filter E6.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The filter E6 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from an object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.
Table 4 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 5 and 6 show high-order term coefficients that can be used for each of the aspherical mirror surfaces S1 through S10 in embodiment 2, wherein each aspherical mirror surface type can be defined by the formula (1) given in embodiment 1 above.
TABLE 4
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -5.7033E-02 | 9.1873E-04 | -1.4101E-01 | 6.3620E-01 | -1.7714E+00 | 2.9501E+00 | -2.8862E+00 |
| S2 | -7.7717E-02 | 1.2223E-02 | -4.5789E-02 | 2.7868E-02 | 9.5002E-02 | -2.3756E-01 | 2.3137E-01 |
| S3 | -5.5624E-02 | 8.3653E-03 | -2.0605E-02 | 1.9033E-02 | -6.9978E-03 | 1.2012E-03 | -5.3787E-05 |
| S4 | -3.8524E-02 | 4.3032E-03 | -3.5873E-02 | 3.4557E-02 | -2.5888E-02 | 1.7350E-02 | -7.4412E-03 |
| S5 | 6.6510E-01 | -1.1911E+00 | 1.9072E+00 | -2.4365E+00 | 2.2236E+00 | -1.3770E+00 | 5.6774E-01 |
| S6 | 4.3429E-01 | -6.6571E-01 | 8.0495E-01 | -7.6002E-01 | 5.1966E-01 | -2.4504E-01 | 7.8176E-02 |
| S7 | -4.4566E-02 | 7.1476E-02 | -1.1300E-01 | 1.3592E-01 | -1.2153E-01 | 7.9059E-02 | -3.7407E-02 |
| S8 | 7.4794E-02 | -8.3569E-02 | 7.5420E-02 | -5.1601E-02 | 3.3775E-02 | -2.2393E-02 | 1.2231E-02 |
| S9 | 1.8309E-01 | -2.0566E-01 | 1.5451E-01 | -8.5327E-02 | 3.4088E-02 | -1.0040E-02 | 2.2293E-03 |
| S10 | 1.2910E-01 | -1.6995E-01 | 1.4995E-01 | -9.8536E-02 | 4.6755E-02 | -1.6045E-02 | 4.0208E-03 |
TABLE 5
TABLE 6
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents 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: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, and filter E6.
The first lens element E1 has positive power, and has a concave object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from an object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.
Table 7 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 8 and 9 show high-order term coefficients that can be used for each of the aspherical mirror surfaces S1 through S10 in embodiment 3, wherein each aspherical mirror surface type can be defined by the formula (1) given in embodiment 1 above.
TABLE 7
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -6.0923E-02 | -1.7836E-03 | -1.3060E-01 | 5.9737E-01 | -1.6988E+00 | 2.8885E+00 | -2.8854E+00 |
| S2 | -7.8348E-02 | 8.6906E-03 | -3.0967E-02 | -1.9681E-02 | 1.8213E-01 | -3.3463E-01 | 2.9554E-01 |
| S3 | -5.2115E-02 | 6.2998E-03 | -9.3757E-03 | 2.5783E-04 | 1.1073E-02 | -9.6286E-03 | 3.8082E-03 |
| S4 | -3.8139E-02 | 4.1928E-03 | -2.9200E-02 | 2.5608E-02 | -1.9436E-02 | 1.4213E-02 | -6.4001E-03 |
| S5 | 6.5337E-01 | -1.1628E+00 | 1.8431E+00 | -2.3166E+00 | 2.0789E+00 | -1.2696E+00 | 5.1836E-01 |
| S6 | 4.2754E-01 | -6.5475E-01 | 7.8901E-01 | -7.3744E-01 | 4.9762E-01 | -2.3152E-01 | 7.2907E-02 |
| S7 | -4.4885E-02 | 7.0650E-02 | -1.1056E-01 | 1.3234E-01 | -1.1764E-01 | 7.6010E-02 | -3.5714E-02 |
| S8 | 7.6907E-02 | -8.9641E-02 | 8.4750E-02 | -6.1440E-02 | 4.0947E-02 | -2.5983E-02 | 1.3466E-02 |
| S9 | 1.8487E-01 | -2.0843E-01 | 1.5620E-01 | -8.5857E-02 | 3.4138E-02 | -1.0011E-02 | 2.2158E-03 |
| S10 | 1.3438E-01 | -1.7862E-01 | 1.5810E-01 | -1.0382E-01 | 4.9267E-02 | -1.6940E-02 | 4.2611E-03 |
TABLE 8
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 1.5505E+00 | -3.4517E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | -1.3224E-01 | 2.4069E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | -7.9122E-04 | 7.1387E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | 1.4165E-03 | -1.1913E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -1.3831E-01 | 2.2869E-02 | -2.0782E-03 | 7.5726E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -1.5247E-02 | 2.0298E-03 | -1.5592E-04 | 5.2686E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 1.2262E-02 | -3.0734E-03 | 5.5598E-04 | -7.0677E-05 | 5.9890E-06 | -3.0371E-07 | 6.9713E-09 |
| S8 | -5.1314E-03 | 1.3888E-03 | -2.6291E-04 | 3.4003E-05 | -2.8625E-06 | 1.4134E-07 | -3.1056E-09 |
| S9 | -3.7402E-04 | 4.7909E-05 | -4.5667E-06 | 3.1260E-07 | -1.4466E-08 | 4.0398E-10 | -5.1284E-12 |
| S10 | -7.8783E-04 | 1.0669E-04 | -1.0437E-05 | 7.1657E-07 | -3.2704E-08 | 8.8988E-10 | -1.0912E-11 |
TABLE 9
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: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, and filter E6.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a concave object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from an object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.
Table 10 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 11 and 12 show high-order term coefficients that can be used for each of the aspherical mirror surfaces S1 through S10 in example 4, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.
TABLE 10
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -5.2421E-02 | -7.5825E-03 | -9.6231E-02 | 4.6007E-01 | -1.3889E+00 | 2.4692E+00 | -2.5582E+00 |
| S2 | -8.0866E-02 | 3.9758E-02 | -1.8180E-01 | 4.3623E-01 | -6.5428E-01 | 6.1086E-01 | -3.4920E-01 |
| S3 | -6.6638E-02 | 2.6454E-02 | -4.7405E-02 | 5.8637E-02 | -3.4209E-02 | 8.5062E-03 | 1.7813E-04 |
| S4 | -4.3045E-02 | -4.4044E-02 | 1.2165E-01 | -2.2014E-01 | 2.2076E-01 | -1.2402E-01 | 3.9234E-02 |
| S5 | 5.2420E-01 | -7.5633E-01 | 1.5653E+00 | -2.7540E+00 | 3.2020E+00 | -2.4074E+00 | 1.1885E+00 |
| S6 | 1.2903E-01 | 1.6386E-01 | -1.8572E-01 | -1.2317E-02 | 1.3498E-01 | -1.0819E-01 | 4.4903E-02 |
| S7 | -2.2939E-01 | 4.2531E-01 | -5.1343E-01 | 4.4577E-01 | -2.8943E-01 | 1.4215E-01 | -5.3001E-02 |
| S8 | 4.1661E-02 | -5.9937E-02 | 1.1856E-01 | -1.5163E-01 | 1.3157E-01 | -8.0303E-02 | 3.4978E-02 |
| S9 | 1.2215E-01 | -5.5703E-02 | -2.0827E-03 | 1.4590E-02 | -8.4955E-03 | 2.6669E-03 | -5.0402E-04 |
| S10 | -2.9023E-02 | 1.3873E-02 | -1.3687E-02 | 7.9158E-03 | -2.7112E-03 | 5.0803E-04 | -2.0304E-05 |
TABLE 11
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 1.4194E+00 | -3.2636E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | 1.1156E-01 | -1.5320E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | -4.6663E-04 | 6.1133E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | -6.5496E-03 | 4.4977E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -3.8513E-01 | 7.9260E-02 | -9.4291E-03 | 4.9508E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -1.1213E-02 | 1.7029E-03 | -1.4570E-04 | 5.4100E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 1.4977E-02 | -3.1819E-03 | 4.9969E-04 | -5.6232E-05 | 4.2876E-06 | -1.9834E-07 | 4.2011E-09 |
| S8 | -1.0962E-02 | 2.4743E-03 | -3.9840E-04 | 4.4612E-05 | -3.2989E-06 | 1.4474E-07 | -2.8517E-09 |
| S9 | 5.4037E-05 | -1.7836E-06 | -3.4163E-07 | 5.5695E-08 | -3.8516E-09 | 1.3633E-10 | -2.0153E-12 |
| S10 | -1.4550E-05 | 4.1262E-06 | -5.8069E-07 | 4.9865E-08 | -2.6465E-09 | 8.0116E-11 | -1.0611E-12 |
TABLE 12
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, in order from an object side to an image side along an optical axis, comprises: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, and filter E6.
The first lens element E1 has positive power, and has a concave object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a concave object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from an object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.
Table 13 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 14 and 15 show high-order term coefficients that can be used for each of the aspherical mirror surfaces S1 through S10 in example 5, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.
TABLE 14
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | -2.2873E-01 | 1.6777E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | 6.6066E-02 | -8.5204E-03 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | -1.3776E-03 | 1.4985E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | -6.6229E-03 | 4.6899E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -2.9760E-01 | 6.0382E-02 | -7.0747E-03 | 3.6582E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -5.0858E-03 | 8.5284E-04 | -7.7137E-05 | 2.9634E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 2.5428E-02 | -5.6462E-03 | 9.2574E-04 | -1.0862E-04 | 8.6212E-06 | -4.1448E-07 | 9.1103E-09 |
| S8 | -1.5716E-02 | 3.6192E-03 | -5.9577E-04 | 6.8360E-05 | -5.1919E-06 | 2.3448E-07 | -4.7656E-09 |
| S9 | 3.8212E-04 | -4.7779E-05 | 4.3403E-06 | -2.7924E-07 | 1.2066E-08 | -3.1397E-10 | 3.7158E-12 |
| S10 | 3.6416E-04 | -4.5744E-05 | 4.1476E-06 | -2.6398E-07 | 1.1179E-08 | -2.8265E-10 | 3.2278E-12 |
Watch 15
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: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, and filter E6.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from an object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.
Table 16 shows basic parameters of the optical imaging lens of example 6, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 17 and 18 show high-order term coefficients that can be used for each of the aspherical mirror surfaces S1 through S10 in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 16
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -5.7262E-02 | -1.4687E-02 | -4.5961E-02 | 2.5505E-01 | -8.9410E-01 | 1.7516E+00 | -1.9458E+00 |
| S2 | -8.8062E-02 | 4.0915E-02 | -1.8639E-01 | 4.5645E-01 | -7.0028E-01 | 6.7349E-01 | -3.9925E-01 |
| S3 | -6.9487E-02 | 1.9844E-02 | -3.5182E-02 | 3.6423E-02 | -7.2531E-03 | -9.2665E-03 | 6.6650E-03 |
| S4 | -4.5857E-02 | -3.1682E-02 | 7.3469E-02 | -1.5545E-01 | 1.7468E-01 | -1.0402E-01 | 3.3806E-02 |
| S5 | 5.1827E-01 | -7.3533E-01 | 1.6273E+00 | -3.1349E+00 | 3.9158E+00 | -3.1222E+00 | 1.6243E+00 |
| S6 | 1.0842E-01 | 2.2595E-01 | -2.3895E-01 | -2.3339E-02 | 1.8778E-01 | -1.5194E-01 | 6.4207E-02 |
| S7 | -2.5105E-01 | 4.9168E-01 | -6.2853E-01 | 5.8308E-01 | -4.0665E-01 | 2.1468E-01 | -8.5857E-02 |
| S8 | 4.7809E-02 | -7.9382E-02 | 1.4230E-01 | -1.7603E-01 | 1.5634E-01 | -9.9982E-02 | 4.5835E-02 |
| S9 | 1.5256E-01 | -9.5666E-02 | 3.3191E-02 | -4.1126E-03 | -2.3810E-03 | 1.4628E-03 | -3.9105E-04 |
| S10 | -4.0450E-03 | -3.0281E-02 | 3.0224E-02 | -1.9386E-02 | 8.7348E-03 | -2.8742E-03 | 7.0203E-04 |
TABLE 17
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 1.1380E+00 | -2.7288E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | 1.3311E-01 | -1.9151E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | -1.7151E-03 | 1.6011E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | -5.6852E-03 | 3.8786E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -5.5290E-01 | 1.1927E-01 | -1.4848E-02 | 8.1435E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -1.6367E-02 | 2.5407E-03 | -2.2243E-04 | 8.4581E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 2.5936E-02 | -5.8678E-03 | 9.7734E-04 | -1.1619E-04 | 9.3228E-06 | -4.5224E-07 | 1.0013E-08 |
| S8 | -1.5081E-02 | 3.5595E-03 | -5.9694E-04 | 6.9388E-05 | -5.3119E-06 | 2.4077E-07 | -4.8928E-09 |
| S9 | 6.0990E-05 | -5.6208E-06 | 2.4744E-07 | 4.2848E-09 | -1.1325E-09 | 5.4789E-11 | -9.4624E-13 |
| S10 | -1.2742E-04 | 1.7051E-05 | -1.6546E-06 | 1.1299E-07 | -5.1398E-09 | 1.3959E-10 | -1.7097E-12 |
Watch 18
Fig. 12A shows on-axis chromatic aberration curves of the optical imaging lens of embodiment 6, which represent 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.
Further, in embodiments 1 to 6, the focal length values f1 to f5 of the respective lenses of the optical imaging lens, 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 19.
| Parameters/ |
1 | 2 | 3 | 4 | 5 | 6 |
| f1(mm) | 7.76 | 7.92 | 8.08 | 6.14 | 5.79 | 6.77 |
| f2(mm) | 11.38 | 13.70 | 13.56 | 13.25 | 17.35 | 11.24 |
| f3(mm) | -3.92 | -2.70 | -2.72 | -4.57 | -4.24 | -4.83 |
| f4(mm) | 2.06 | 2.12 | 2.12 | 1.97 | 1.99 | 1.94 |
| f5(mm) | -3.15 | -5.73 | -5.62 | -2.65 | -2.88 | -2.48 |
| f(mm) | 3.86 | 3.86 | 3.86 | 3.86 | 3.86 | 3.86 |
| TTL(mm) | 7.17 | 7.07 | 7.09 | 7.25 | 7.08 | 7.12 |
| ImgH(mm) | 3.38 | 3.38 | 3.38 | 3.38 | 3.38 | 3.38 |
Table 19 each of the conditional expressions in example 1 to example 6 satisfies the condition shown in table 20.
| Conditions/examples | 1 | 2 | 3 | 4 | 5 | 6 |
| TTL/(ImgH×tan(CRAmax)) | 8.04 | 7.92 | 7.93 | 8.12 | 7.85 | 7.98 |
| f1/f | 2.01 | 2.05 | 2.09 | 1.59 | 1.50 | 1.75 |
| f3/(R5+R6) | 2.31 | 1.24 | 1.24 | 2.78 | 2.51 | 2.92 |
| (R7-R8)/f4 | 2.12 | 2.19 | 2.19 | 2.22 | 2.27 | 2.31 |
| ImgH/f5 | -1.07 | -0.59 | -0.60 | -1.28 | -1.17 | -1.36 |
| R2/R10 | -3.53 | -4.59 | -4.36 | -2.52 | -2.32 | -2.53 |
| (CT1+CT2)/(T12+T23) | 0.96 | 0.91 | 0.89 | 1.41 | 1.19 | 1.11 |
| CT4/(CT3+CT5) | 1.79 | 1.72 | 1.73 | 1.49 | 1.54 | 1.41 |
| DT31/DT11 | 1.70 | 1.70 | 1.72 | 1.68 | 1.63 | 1.63 |
| DT52/DT12 | 2.71 | 2.72 | 2.73 | 2.69 | 2.67 | 2.67 |
| f23/SL | -0.89 | -0.52 | -0.52 | -0.93 | -0.77 | -1.19 |
| f45/(ET4+ET5) | 2.47 | 2.13 | 2.08 | 3.04 | 3.18 | 3.04 |
| ET3/CT3 | 2.23 | 3.14 | 3.17 | 1.99 | 1.98 | 1.88 |
| (SAG31+SAG32)/(SAG51+SAG52) | -1.73 | -1.14 | -1.17 | -1.51 | -1.18 | -1.57 |
Watch 20
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 positive optical power;
a third lens with negative focal power, wherein the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface;
the fourth lens with positive focal power has a convex object-side surface and a convex image-side surface; and
a fifth lens having a negative optical power,
the optical imaging lens satisfies:
5＜TTL/(ImgH×tan(CRAmax))＜11，
wherein, TTL is the distance between the object side surface of the first lens and the imaging surface of the optical imaging lens along the optical axis, ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, CRAmax is the maximum incident angle of the main ray incident on the electronic photosensitive component,
wherein the number of lenses having power in the optical imaging lens is five.
2. The optical imaging lens of claim 1, wherein the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens satisfy:
1.4＜f1/f＜2.2。
3. the optical imaging lens of claim 1, wherein the effective focal length f3 of the third lens, the radius of curvature R5 of the object-side surface of the third lens, and the radius of curvature R6 of the image-side surface of the third lens satisfy:
1.1＜f3/(R5+R6)＜3.1。
4. the optical imaging lens of claim 1, wherein the radius of curvature R7 of the object-side surface of the fourth lens, the radius of curvature R8 of the image-side surface of the fourth lens, and the effective focal length f4 of the fourth lens satisfy:
2.0＜(R7-R8)/f4＜2.5。
5. the optical imaging lens according to claim 1, wherein the half ImgH of the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens and the effective focal length f5 of the fifth lens satisfy:
-1.5＜ImgH/f5＜-0.5。
6. the optical imaging lens of claim 1, wherein the radius of curvature R2 of the image-side surface of the first lens and the radius of curvature R10 of the image-side surface of the fifth lens satisfy:
-4.7＜R2/R10＜-2.2。
7. the optical imaging lens according to any one of claims 1 to 6, wherein a central thickness CT1 of the first lens on an optical axis, a central thickness CT2 of the second lens on the optical axis, a separation distance T12 of the first lens and the second lens on the optical axis, and a separation distance T23 of the second lens and the third lens on the optical axis satisfy:
0.7＜(CT1+CT2)/(T12+T23)＜1.6。
8. the optical imaging lens according to any one of claims 1 to 6, wherein the central thickness CT4 of the fourth lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the central thickness CT5 of the fifth lens on the optical axis satisfy:
1.3＜CT4/(CT3+CT5)＜1.9。
9. the optical imaging lens according to any one of claims 1 to 6, wherein an effective semi-aperture diameter DT31 of the object side surface of the third lens and an effective semi-aperture diameter DT11 of the object side surface of the first lens satisfy:
1.5＜DT31/DT11＜1.8。
10. the optical imaging lens according to any one of claims 1 to 6, wherein an effective semi-aperture diameter DT52 of the image side surface of the fifth lens and an effective semi-aperture diameter DT12 of the image side surface of the first lens satisfy:
2.5＜DT52/DT12＜2.9。
11. the optical imaging lens according to any one of claims 1 to 6, characterized in that a combined focal length f23 of the second lens and the third lens and an on-axis distance SL from a diaphragm to an imaging surface of the optical imaging lens satisfy:
-1.3＜f23/SL＜-0.4。
12. the optical imaging lens according to any one of claims 1 to 6, characterized in that the combined focal length f45 of the fourth lens and the fifth lens, the edge thickness ET4 of the fourth lens and the edge thickness ET5 of the fifth lens satisfy:
1.9＜f45/(ET4+ET5)＜3.6。
13. the optical imaging lens according to any one of claims 1 to 6, wherein the edge thickness ET3 of the third lens and the central thickness CT3 of the third lens on the optical axis satisfy:
1.6＜ET3/CT3＜3.3。
14. the optical imaging lens according to any one of claims 1 to 6, wherein an on-axis distance SAG31 from an intersection point of an object-side surface and an optical axis of the third lens to an effective radius vertex of the object-side surface of the third lens, an on-axis distance SAG32 from an intersection point of an image-side surface and an optical axis of the third lens to an effective radius vertex of an image-side surface of the third lens, an on-axis distance SAG51 from an intersection point of an object-side surface and an optical axis of the fifth lens to an effective radius vertex of an object-side surface of the fifth lens, and an on-axis distance SAG52 from an intersection point of an image-side surface and an optical axis of the fifth lens to an effective radius vertex of an image-side surface of the fifth lens satisfy:
-1.9＜(SAG31+SAG32)/(SAG51+SAG52)＜-1.0。
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| CN106980171A (en) * | 2017-05-26 | 2017-07-25 | 浙江舜宇光学有限公司 | Pick-up lens |
| CN107462976A (en) * | 2017-09-13 | 2017-12-12 | 浙江舜宇光学有限公司 | Pick-up lens |
| JPWO2016178260A1 (en) * | 2015-05-01 | 2018-02-22 | 株式会社ニコン | Imaging lens and imaging apparatus |
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| JPWO2016178260A1 (en) * | 2015-05-01 | 2018-02-22 | 株式会社ニコン | Imaging lens and imaging apparatus |
| CN106896481A (en) * | 2017-04-18 | 2017-06-27 | 浙江舜宇光学有限公司 | Imaging lens |
| CN106980171A (en) * | 2017-05-26 | 2017-07-25 | 浙江舜宇光学有限公司 | Pick-up lens |
| CN107462976A (en) * | 2017-09-13 | 2017-12-12 | 浙江舜宇光学有限公司 | Pick-up lens |
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