CN113484994B - Optical imaging lens - Google Patents

Optical imaging lens Download PDF

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Publication number
CN113484994B
CN113484994B CN202110879600.XA CN202110879600A CN113484994B CN 113484994 B CN113484994 B CN 113484994B CN 202110879600 A CN202110879600 A CN 202110879600A CN 113484994 B CN113484994 B CN 113484994B
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lens
optical imaging
optical
imaging lens
satisfy
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CN113484994A (en
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刘子维
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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    • 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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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

The application discloses an optical imaging lens, which sequentially comprises the following components from an object side to an image side along an optical axis: a first lens having positive optical power; a second lens having negative optical power; a third lens having positive optical power, the object side surface of which is a convex surface; a fourth lens having optical power; a fifth lens having optical power; and a sixth lens with optical power, wherein the object side surface of the sixth lens is a convex surface. The distance TTL from the object side surface of the first lens element to the imaging surface of the optical imaging lens along the optical axis and half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy: TTL/ImgH < 1.2. Half of the Semi-FOV of the maximum field angle of the optical imaging lens and the effective focal length f of the optical imaging lens satisfy the following conditions: tan (Semi-FOV). Times.f > 5. The effective focal length f2 of the second lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: -6 < f2/EPD < -3.

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
Electronic products such as smart phones and tablet computers have the advantage of portability, so that the popularity of the electronic products is higher and higher, and the development of cameras carried in the electronic products is also a daily change. On the one hand, the trend of the electronic products to be lighter and thinner is increasing, and the imaging lens applied to the electronic products is required to be more miniaturized and lighter and thinner. On the other hand, with the improvement in performance and the reduction in size of CCD (Charge Coupled Device, photosensitive coupling element) and CMOS (Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductor element) image sensors, the corresponding imaging lenses are also required to have high-quality imaging performance and miniaturization characteristics. Therefore, miniaturization and high imaging quality are trends in the development of optical imaging lenses in order to more adapt to the demands of the imaging lenses applied thereto by the increasingly portable electronic products.
Disclosure of Invention
An aspect of the present application provides an optical imaging lens, including, in order from an object side to an image side along an optical axis: a first lens having positive optical power; a second lens having negative optical power; a third lens having positive optical power, the object side surface of which is a convex surface; a fourth lens having optical power; a fifth lens having optical power; and a sixth lens with optical power, wherein the object side surface of the sixth lens is a convex surface. 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 and half of the diagonal length ImgH of the effective pixel area on the imaging surface may satisfy: TTL/ImgH < 1.2. Half of the Semi-FOV of the maximum field angle of the optical imaging lens and the effective focal length f of the optical imaging lens can meet the following conditions: tan (Semi-FOV). Times.f > 5. The effective focal length f2 of the second lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy: -6 < f2/EPD < -3.
In one embodiment, the maximum effective radius DT22 of the image side surface of the second lens and the maximum effective radius DT42 of the image side surface of the fourth lens may satisfy: DT22/DT42 is more than 0 and less than or equal to 0.57.
In one embodiment, the maximum effective radius DT31 of the object-side surface of the third lens and the maximum effective radius DT21 of the object-side surface of the second lens may satisfy: 0.8 < DT31/DT21 < 1.
In one embodiment, the maximum effective radius DT32 of the image side surface of the third lens and the separation distance T12 between the first lens and the second lens on the optical axis may satisfy: DT32/T12 is 1 < 1.2.
In one embodiment, the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens may satisfy: 0.5 < f1/f < 1.
In one embodiment, the edge thickness ET1 of the first lens and the center thickness CT1 of the first lens on the optical axis may satisfy: ET1/CT1 is more than 0 and less than 0.5.
In one embodiment, the edge thickness ET6 of the sixth lens and the edge thickness ET5 of the fifth lens may satisfy: (ET 6-ET 5)/(ET 6+ET 5) is less than or equal to 0.45.
In one embodiment, a center thickness CT6 of the sixth lens on the optical axis and a center thickness CT5 of the fifth lens on the optical axis may satisfy: CT6/CT5 is more than 0 and less than or equal to 1.03.
In one embodiment, the radius of curvature R12 of the image side surface of the sixth lens and the radius of curvature R11 of the object side surface of the sixth lens may satisfy: R12/R11 is more than 0 and less than 1.
In one embodiment, a center thickness CT5 of the fifth lens on the optical axis, a separation distance T45 of the fourth lens and the fifth lens on the optical axis, and a separation distance T56 of the fifth lens and the sixth lens on the optical axis may satisfy: CT 5/(T45+T56) < 0.3 < 0.9.
In one embodiment, the sum Σat of the separation distance T12 between the first lens and the second lens on the optical axis and the separation distance between any adjacent two lenses of the first lens to the fourth lens on the optical axis may satisfy: 0 < T12/ΣAT < 0.2.
In one embodiment, an on-axis distance SAG61 from an intersection point of the 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 and an on-axis distance SAG62 from an intersection point of the 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 may satisfy: 0.5 < SAG61/SAG62 < 1.
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: 0 < f 3/|R5+R6| < 2.
Another aspect of the present application provides an optical imaging lens sequentially including, from an object side to an image side along an optical axis: a first lens having positive optical power; a second lens having negative optical power; a third lens having positive optical power, the object side surface of which is a convex surface; a fourth lens having optical power; a fifth lens having optical power; and a sixth lens with optical power, wherein the object side surface of the sixth lens is a convex surface. 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 and half of the diagonal length ImgH of the effective pixel area on the imaging surface may satisfy: TTL/ImgH < 1.2. The effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens can satisfy: 0.5 < f1/f < 1. The effective focal length f2 of the second lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy: -6 < f2/EPD < -3.
In one embodiment, the maximum effective radius DT22 of the image side surface of the second lens and the maximum effective radius DT42 of the image side surface of the fourth lens may satisfy: DT22/DT42 is more than 0 and less than or equal to 0.57.
In one embodiment, half of the maximum field angle Semi-FOV of the optical imaging lens and the effective focal length f of the optical imaging lens may satisfy: tan (Semi-FOV). Times.f > 5.
In one embodiment, the maximum effective radius DT31 of the object-side surface of the third lens and the maximum effective radius DT21 of the object-side surface of the second lens may satisfy: 0.8 < DT31/DT21 < 1.
In one embodiment, the maximum effective radius DT32 of the image side surface of the third lens and the separation distance T12 between the first lens and the second lens on the optical axis may satisfy: DT32/T12 is 1 < 1.2.
In one embodiment, the edge thickness ET1 of the first lens and the center thickness CT1 of the first lens on the optical axis may satisfy: ET1/CT1 is more than 0 and less than 0.5.
In one embodiment, the edge thickness ET6 of the sixth lens and the edge thickness ET5 of the fifth lens may satisfy: (ET 6-ET 5)/(ET 6+ET 5) is less than or equal to 0.45.
In one embodiment, a center thickness CT6 of the sixth lens on the optical axis and a center thickness CT5 of the fifth lens on the optical axis may satisfy: CT6/CT5 is more than 0 and less than or equal to 1.03.
In one embodiment, the radius of curvature R12 of the image side surface of the sixth lens and the radius of curvature R11 of the object side surface of the sixth lens may satisfy: R12/R11 is more than 0 and less than 1.
In one embodiment, a center thickness CT5 of the fifth lens on the optical axis, a separation distance T45 of the fourth lens and the fifth lens on the optical axis, and a separation distance T56 of the fifth lens and the sixth lens on the optical axis may satisfy: CT 5/(T45+T56) < 0.3 < 0.9.
In one embodiment, the sum Σat of the separation distance T12 between the first lens and the second lens on the optical axis and the separation distance between any adjacent two lenses of the first lens to the fourth lens on the optical axis may satisfy: 0 < T12/ΣAT < 0.2.
In one embodiment, an on-axis distance SAG61 from an intersection point of the 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 and an on-axis distance SAG62 from an intersection point of the 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 may satisfy: 0.5 < SAG61/SAG62 < 1.
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: 0 < f 3/|R5+R6| < 2.
The application adopts a six-lens framework, and the lens has at least one of the beneficial effects of ultra-thin, high pixel, large image surface, good imaging quality and the like by reasonably distributing the focal power of each lens and optimally selecting the surface type and thickness of each lens.
Drawings
Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 shows a schematic configuration diagram of an optical imaging lens according to embodiment 1 of the present application;
fig. 2A to 2D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 1;
fig. 3 is a schematic diagram showing the structure of an optical imaging lens according to embodiment 2 of the present application;
fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 2;
fig. 5 shows a schematic structural view of an optical imaging lens according to embodiment 3 of the present application;
fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 3;
Fig. 7 shows a schematic configuration diagram of an optical imaging lens according to embodiment 4 of the present application;
fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 4;
fig. 9 shows a schematic configuration diagram of an optical imaging lens according to embodiment 5 of the present application;
fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 5;
fig. 11 shows a schematic structural view of an optical imaging lens according to embodiment 6 of the present application; and
fig. 12A to 12D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 6.
Detailed Description
For a better understanding of the application, various aspects of the 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 application and is not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is referred to herein as the object side of the lens, and the surface of each lens closest to the imaging plane is referred to as the image side of the lens.
It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the application, use of "may" means "one or more embodiments of the 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, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
The features, principles, and other aspects of the present application are described in detail below.
The optical imaging lens according to the exemplary embodiment of the present application may include, for example, six lenses having optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses are sequentially arranged from the object side to the image side along the optical axis.
In an exemplary embodiment, the first lens may have positive optical power; the second lens may have negative optical power; the third lens may have positive optical power; the fourth lens may have positive or negative optical power; the fifth lens may have positive or negative optical power; the sixth lens may have positive or negative optical power.
In an exemplary embodiment, the object side surface of the third lens may be convex. The object side surface of the sixth lens may be convex.
By reasonably configuring the focal power and the surface shape of each lens, the imaging device can be favorable for obtaining better imaging quality and realizing the ultrathin characteristic of the system.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition that TTL/ImgH < 1.2, where TTL is a distance between an object side surface of the first lens and an imaging surface of the optical imaging lens along an optical axis, and ImgH is a half of a diagonal length of an effective pixel area on the imaging surface. The ratio of the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis to half of the diagonal length of the effective pixel area on the imaging surface is controlled within the range, so that the characteristics of ultra-thin and large imaging surface of the system can be realized.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy a conditional expression tan (Semi-FOV) ×f > 5, where Semi-FOV is half of a maximum field angle of the optical imaging lens and f is an effective focal length of the optical imaging lens. By controlling the product of the tangent value of half of the maximum field angle of the optical imaging lens and the effective focal length of the optical imaging lens in the range, the characteristics of ultra-thin and large image surface of the system can be realized.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition-6 < f2/EPD < -3, where f2 is an effective focal length of the second lens and EPD is an entrance pupil diameter of the optical imaging lens. By controlling the ratio of the effective focal length of the second lens to the entrance pupil diameter of the optical imaging lens in the range, the characteristics of ultra-thin and large image surface of the system can be realized, and better imaging quality can be obtained. More specifically, f2 and EPD may satisfy-5 < f2/EPD < -4.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < DT22/DT 42.ltoreq.0.57, where DT22 is the maximum effective radius of the image side of the second lens and DT42 is the maximum effective radius of the image side of the fourth lens. By controlling the ratio of the maximum effective radius of the image side surface of the second lens to the maximum effective radius of the image side surface of the fourth lens in the range, the range of incident light rays can be reasonably limited, light rays with poor edge quality can be removed, off-axis aberration can be reduced, and the resolution of the optical imaging lens can be effectively improved. More specifically, DT22 and DT42 may satisfy 0.5 < DT22/DT 42.ltoreq.0.57.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.8 < DT31/DT21 < 1, wherein DT31 is a maximum effective radius of an object side surface of the third lens and DT21 is a maximum effective radius of an object side surface of the second lens. By controlling the ratio of the maximum effective radius of the object side surface of the third lens to the maximum effective radius of the object side surface of the second lens in the range, the front end size of the lens can be reduced, and the whole optical imaging lens is lighter and thinner.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1 < DT32/T12 < 1.2, wherein DT32 is the maximum effective radius of the image side surface of the third lens, and T12 is the separation distance of the first lens and the second lens on the optical axis. By controlling the ratio of the maximum effective radius of the image side surface of the third lens to the interval distance between the first lens and the second lens on the optical axis within the range, the field curvature and the distortion of the system can be effectively ensured, so that the off-axis vision field has good imaging quality. More specifically, DT32 and T12 may satisfy 1 < DT32/T12 < 1.1.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.5 < f1/f < 1, where f1 is an effective focal length of the first lens and f is an effective focal length of the optical imaging lens. By controlling the ratio of the effective focal length of the first lens to the effective focal length of the optical imaging lens within the range, the curvature of field of the restraint system can be reasonably controlled within a certain range. More specifically, f1 and f may satisfy 0.7 < f1/f < 0.9.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < ET1/CT1 < 0.5, where ET1 is an edge thickness of the first lens and CT1 is a center thickness of the first lens on the optical axis. By controlling the ratio of the edge thickness of the first lens to the center thickness of the first lens on the optical axis within the range, the shape of the first lens can be effectively controlled, and the molding processing is facilitated. More specifically, ET1 and CT1 may satisfy 0.3 < ET1/CT1 < 0.4.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < (ET 6-ET 5)/(ET 6+et5) +.0.45, where ET6 is the edge thickness of the sixth lens and ET5 is the edge thickness of the fifth lens. By controlling the ratio of the difference between the edge thickness of the sixth lens and the edge thickness of the fifth lens to the sum of the edge thickness of the sixth lens and the edge thickness of the fifth lens in the range, spherical aberration and chromatic aberration can be effectively reduced, and imaging quality of the lens can be improved.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < CT6/CT 5.ltoreq.1.03, wherein CT6 is the center thickness of the sixth lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis. By controlling the ratio of the center thickness of the sixth lens on the optical axis to the center thickness of the fifth lens on the optical axis within the range, the distortion contribution of the two elements of the sixth lens and the fifth lens can be within a reasonable range, the final distortion of each view field is controlled within 2%, the sensitivity of the sixth lens and the fifth lens is reduced, the injection molding processing is easy, and the yield of the system is improved. More specifically, CT6 and CT5 may satisfy 0.5 < CT6/CT 5.ltoreq.1.03.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < R12/R11 < 1, where R12 is a radius of curvature of an image side surface of the sixth lens element and R11 is a radius of curvature of an object side surface of the sixth lens element. By controlling the ratio of the curvature radius of the image side surface of the sixth lens to the curvature radius of the object side surface of the sixth lens in the range, the deflection angle of the marginal ray of the system can be reasonably controlled, and the sensitivity of the system can be effectively reduced. More specifically, R12 and R11 may satisfy 0 < R12/R11 < 0.6.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.3 < CT 5/(t45+t56) < 0.9, where CT5 is the center thickness of the fifth lens on the optical axis, T45 is the separation distance of the fourth lens and the fifth lens on the optical axis, and T56 is the separation distance of the fifth lens and the sixth lens on the optical axis. By controlling the ratio of the center thickness of the fifth lens on the optical axis to the sum of the interval distance between the fourth lens and the fifth lens on the optical axis and the interval distance between the fifth lens and the sixth lens on the optical axis within the range, the curvature of field and the distortion of the system can be effectively ensured, so that the off-axis vision field has good imaging quality. More specifically, CT5, T45 and T56 may satisfy 0.5 < CT 5/(T45+T56) < 0.8.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < T12/Σat < 02, where T12 is the distance between the first lens and the second lens on the optical axis, Σat is the sum of the distances between any adjacent two lenses of the first lens to the fourth lens on the optical axis. By controlling the ratio of the interval distance between the first lens and the second lens on the optical axis to the sum of the interval distances between any two adjacent lenses of the first lens and the fourth lens on the optical axis within the range, the distortion contribution amount of the system can be reasonably controlled, so that the system has good distortion performance.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.5 < SAG61/SAG62 < 1, wherein SAG61 is an on-axis distance from an intersection point of the 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, and SAG62 is an on-axis distance from an intersection point of the 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. By controlling the ratio of the on-axis distance from the intersection point of the object side surface of the sixth lens and the optical axis to the vertex of the effective radius of the object side surface of the sixth lens to the on-axis distance from the intersection point of the image side surface of the sixth lens and the optical axis to the vertex of the effective radius of the image side surface of the sixth lens to be in the range, the processing, forming and assembling of the sixth lens can be favorably ensured so as to obtain good imaging quality, and the edge view ray trend can be effectively controlled, so that the system can be better matched with a chip. More specifically, SAG61 and SAG62 may satisfy 0.6 < SAG61/SAG62 < 1.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition of 0 < f 3/|r5+r6| < 2, where f3 is an effective focal length of the third lens element, R5 is a radius of curvature of an object-side surface of the third lens element, and R6 is a radius of curvature of an image-side surface of the third lens element. By controlling the ratio of the effective focal length of the third lens to the absolute value 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 in the range, the contribution of the effective focal length to the fifth-order spherical aberration of the system can be well controlled, and the third-order spherical aberration generated by the lens can be further compensated, so that the system has good imaging quality on the axis. More specifically, f3, R5, and R6 may satisfy 0.1 < f 3/|R5+R6| < 1.8.
In an exemplary embodiment, the optical imaging lens may further include at least one diaphragm. The diaphragm may be provided at an appropriate position as required, 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 located on the imaging surface.
The optical imaging lens according to the above embodiment of the present application may employ a plurality of lenses, for example, six lenses as described above. By reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial spacing between each lens and the like, the lens has the characteristics of ultra-thin, high pixel, large image surface, good imaging quality and the like.
In an embodiment of the present application, at least one of the mirrors of each lens is an aspherical mirror, i.e., at least one of the object side surface of the first lens to the image side surface of the sixth lens is an aspherical mirror. The aspherical lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring during imaging can be eliminated as much as possible, thereby improving imaging quality. Optionally, at least one of an object side surface and an image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens is an aspherical mirror surface. Optionally, the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are aspherical mirror surfaces.
However, it will be appreciated by those skilled in the art that the number of lenses making up the optical imaging lens can be varied to achieve the various results and advantages described in this specification without departing from the technical solution claimed in the present application. For example, although six lenses are described as an example in the embodiment, the optical imaging lens is not limited to include six lenses. The optical imaging lens may also include other numbers of lenses, if desired.
Specific examples of the optical imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.
Example 1
An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic configuration diagram of an optical imaging lens according to embodiment 1 of the present application.
As shown in fig. 1, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, and filter E7.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. The optical imaging lens has an imaging surface S15, and light from an object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 1 shows basic parameters of the optical imaging lens of embodiment 1, in which the unit of curvature radius and thickness/distance is millimeter (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 sixth lens E6 are aspherical, and the surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:
wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the aspherical i-th order. The following tables 2-1 and 2-2 give the higher order coefficients A that can be used for each of the aspherical mirror faces S1 to S12 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 And A 28 。
TABLE 2-1
Face number A18 A20 A22 A24 A26 A28
S1 -1.0085E-05 -2.1860E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 6.6811E-06 4.0892E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 9.6278E-06 3.3439E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 7.3445E-06 -2.6215E-08 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S5 9.0826E-06 1.2693E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S6 -1.1244E-04 -7.0856E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S7 -6.9607E-06 -1.6265E-04 -7.9489E-05 -5.1728E-05 0.0000E+00 0.0000E+00
S8 -1.5376E-04 2.8854E-04 7.7682E-05 -1.1441E-04 0.0000E+00 0.0000E+00
S9 -3.1921E-04 3.8146E-04 1.4803E-04 -2.1916E-04 -2.1130E-05 3.6349E-05
S10 1.9506E-03 -1.3448E-03 6.2969E-04 -4.2480E-04 3.6728E-05 -1.2160E-04
S11 2.9386E-03 -1.9765E-03 2.2329E-03 -1.4107E-03 4.9249E-04 -1.3389E-04
S12 9.6819E-03 -8.9844E-04 3.1333E-03 -9.5559E-04 -4.7203E-05 -4.4847E-04
TABLE 2-2
Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve of the optical imaging lens of embodiment 1, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens provided in embodiment 1 can achieve good imaging quality.
Example 2
An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. In this embodiment and the following embodiments, descriptions of portions similar to embodiment 1 will be omitted for brevity. Fig. 3 shows a schematic configuration of an optical imaging lens according to embodiment 2 of the present application.
As shown in fig. 3, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, and filter E7.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. The optical imaging lens has an imaging surface S15, and light from an object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 3 shows basic parameters of the optical imaging lens of embodiment 2, in which the unit of curvature radius and thickness/distance is millimeter (mm). Tables 4-1 and 4-2 show the higher order coefficients A that can be used for each of the aspherical mirror surfaces S1 to S12 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 And A 28 Wherein each aspherical surface profile can be defined by the formula (1) given in the above-described embodiment 1.
TABLE 3 Table 3
Face number A4 A6 A8 A10 A12 A14 A16
S1 -2.4483E-02 -7.8243E-03 -3.5452E-03 -1.3546E-03 -4.9439E-04 -1.5446E-04 -6.0430E-05
S2 -4.1766E-02 -1.5433E-03 -1.6111E-03 -3.1497E-04 -8.4590E-05 -3.8882E-05 -9.2494E-06
S3 1.3042E-02 1.3576E-02 -7.7993E-04 3.3019E-04 4.3239E-06 -3.7315E-05 -4.0321E-06
S4 5.1637E-02 1.2718E-02 6.2817E-04 4.5758E-04 1.0109E-04 1.8485E-05 -6.5016E-07
S5 -8.1858E-02 2.1906E-05 -1.1794E-04 2.1307E-04 6.3556E-05 5.1831E-07 -8.4350E-06
S6 -1.3382E-01 9.2400E-03 4.5231E-03 2.3950E-03 6.4363E-04 1.3772E-04 -7.8568E-05
S7 -3.3023E-01 1.4343E-02 -8.5183E-03 -2.9218E-03 6.7432E-04 7.7826E-04 4.2959E-04
S8 -4.1822E-01 1.3695E-01 -3.7520E-02 -8.5077E-03 6.3470E-03 6.8523E-05 -1.0771E-03
S9 -1.3483E+00 2.4600E-01 5.7392E-02 -5.5619E-02 9.1878E-03 6.0339E-03 1.4042E-03
S10 -1.5925E+00 2.4228E-02 5.0634E-02 -4.0489E-03 -9.1504E-03 -3.1928E-03 2.1966E-03
S11 -3.8285E+00 1.1858E+00 -3.8532E-01 1.2691E-01 -6.7233E-02 4.2366E-02 -1.4009E-02
S12 -6.8478E+00 1.2803E+00 -3.3786E-01 1.7481E-01 -8.0832E-02 2.2284E-02 -2.0475E-02
TABLE 4-1
TABLE 4-2
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve of the optical imaging lens of embodiment 2, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens provided in embodiment 2 can achieve good imaging quality.
Example 3
An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic configuration diagram of an optical imaging lens according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, and filter E7.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. The optical imaging lens has an imaging surface S15, and light from an object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 5 shows basic parameters of the optical imaging lens of embodiment 3, in which the unit of curvature radius and thickness/distance is millimeter (mm). Tables 6-1 and 6-2 show the higher order term coefficients A that can be used for each of the aspherical mirror faces S1 to S12 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 Wherein each aspherical surface profile can be defined by the formula (1) given in the above-described embodiment 1.
TABLE 5
Face number A4 A6 A8 A10 A12 A14 A16
S1 4.2699E-03 -4.8075E-03 -4.0630E-03 -1.8299E-03 -7.3453E-04 -2.1539E-04 -7.0278E-05
S2 -8.2217E-02 1.5830E-03 -2.5644E-03 -4.1081E-04 -4.2186E-05 -4.7076E-05 -8.0337E-06
S3 1.4523E-02 2.3948E-02 -8.6464E-04 1.1871E-03 1.3751E-04 -5.8151E-05 8.5563E-06
S4 6.5630E-02 2.4319E-02 3.0302E-03 2.1270E-03 6.7966E-04 2.0277E-04 4.7986E-05
S5 -1.8140E-01 -1.0835E-02 7.4206E-04 1.6517E-03 9.0673E-04 3.7212E-04 1.7939E-04
S6 -2.8119E-01 7.6992E-03 1.1770E-02 6.1385E-03 1.7078E-03 8.6412E-05 -2.4214E-04
S7 -5.7232E-01 2.1361E-01 -6.4428E-02 -2.2234E-03 6.0161E-03 -3.6666E-04 -2.1080E-03
S8 -9.8146E-01 3.8487E-01 -1.4786E-01 7.9273E-03 1.3838E-02 -5.5661E-03 -3.7081E-03
S9 -1.5907E+00 3.4150E-01 4.6361E-02 -3.0371E-02 -1.3773E-02 4.0749E-03 8.1563E-03
S10 2.5322E-01 4.8891E-02 2.3080E-02 2.7874E-02 6.7566E-03 3.3074E-03 -7.5539E-04
S11 -2.1263E+00 1.1309E+00 -5.5463E-01 2.6793E-01 -1.3364E-01 6.2285E-02 -3.0896E-02
S12 -6.5944E+00 1.5861E+00 -4.2640E-01 2.4801E-01 -1.5313E-01 5.2223E-02 -3.4241E-02
TABLE 6-1
Face number A18 A20 A22 A24 A26 A28 A30
S1 -1.0871E-05 -4.4635E-06 5.3137E-06 8.2902E-06 4.5537E-06 -1.6154E-06 -2.3619E-06
S2 4.7076E-06 6.8790E-06 7.1767E-06 1.0290E-05 8.3245E-06 -1.0143E-06 -7.0838E-06
S3 2.1805E-06 1.7881E-05 5.8464E-06 2.9159E-06 2.0030E-06 1.6004E-06 -5.7925E-06
S4 2.7422E-06 -1.7821E-05 -1.0688E-05 -9.3552E-06 -2.2810E-06 -5.5331E-06 -2.3249E-06
S5 4.2271E-05 3.4609E-05 4.3204E-06 8.0468E-06 -6.9840E-06 -6.0632E-06 -1.0253E-05
S6 -2.7382E-04 -1.2137E-04 -7.1134E-05 -9.0454E-06 -1.1640E-05 2.9447E-06 -4.2664E-06
S7 1.8665E-04 3.7618E-04 -3.7962E-04 2.9256E-05 3.8732E-05 7.0858E-05 1.6939E-05
S8 1.8760E-03 3.6490E-04 -1.0117E-03 3.3574E-04 1.5209E-04 -4.8700E-05 -8.7384E-05
S9 -3.3864E-03 -1.5018E-03 2.7145E-04 7.1999E-04 -2.2484E-04 -6.0416E-05 1.3429E-05
S10 -5.5282E-03 -8.8250E-04 -7.6171E-04 -2.8112E-04 1.1904E-04 2.2840E-04 2.3593E-04
S11 1.6143E-02 -7.6835E-03 1.6483E-03 7.3305E-04 -1.2552E-03 6.4736E-04 -2.0682E-04
S12 2.2046E-02 -5.9502E-03 3.5954E-03 -3.3324E-03 3.8591E-04 -6.0240E-04 5.3857E-04
TABLE 6-2
Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve of the optical imaging lens of embodiment 3, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens provided in embodiment 3 can achieve good imaging quality.
Example 4
An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic configuration diagram of an optical imaging lens according to embodiment 4 of the present application.
As shown in fig. 7, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, and filter E7.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is concave, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. The optical imaging lens has an imaging surface S15, and light from an object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 7 shows basic parameters of the optical imaging lens of embodiment 4, in which the unit of curvature radius and thickness/distance is millimeter (mm). Tables 8-1 and 8-2 show the higher order term coefficients A that can be used for each of the aspherical mirror faces S1 to S12 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 And A 28 Wherein each aspherical surface profile can be defined by the formula (1) given in the above-described embodiment 1.
TABLE 7
TABLE 8-1
Face number A18 A20 A22 A24 A26 A28
S1 -2.7429E-06 3.0529E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 -4.0062E-09 3.1256E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 1.1194E-05 6.3988E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 4.0697E-06 -2.6362E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S5 5.9164E-06 2.8156E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S6 8.3967E-06 -1.1521E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S7 2.7498E-04 6.7408E-05 4.4115E-05 -1.2949E-05 0.0000E+00 0.0000E+00
S8 -2.2725E-04 3.8708E-04 1.8490E-04 -1.0943E-04 0.0000E+00 0.0000E+00
S9 -1.2981E-03 -1.7173E-04 6.5389E-04 -1.0518E-04 6.9742E-05 -8.5175E-05
S10 4.6890E-03 -1.6083E-03 -1.1769E-04 -1.4361E-03 -3.5287E-04 -2.3681E-04
S11 1.8352E-03 -2.5019E-03 2.6818E-03 -2.3083E-03 5.3651E-04 -1.4978E-04
S12 1.0016E-02 -3.8737E-03 2.1198E-03 -1.2597E-03 4.4416E-04 -5.5343E-04
TABLE 8-2
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve of the optical imaging lens of embodiment 4, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens provided in embodiment 4 can achieve good imaging quality.
Example 5
An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic configuration of an optical imaging lens according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, and filter E7.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is concave, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. The optical imaging lens has an imaging surface S15, and light from an object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 9 shows basic parameters of the optical imaging lens of embodiment 5, in which the unit of curvature radius and thickness/distance is millimeter (mm). Tables 10-1 and 10-2 show the higher order term coefficients A that can be used for each of the aspherical mirror faces S1 to S12 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 And A 28 Wherein each aspherical surface profile can be defined by the formula (1) given in the above-described embodiment 1.
TABLE 9
Face number A4 A6 A8 A10 A12 A14 A16
S1 -2.6527E-02 -9.7342E-03 -4.1825E-03 -1.5764E-03 -5.2272E-04 -1.4920E-04 -3.5439E-05
S2 -4.6537E-02 -2.6881E-03 -1.4333E-03 -1.8211E-04 1.6737E-05 1.7958E-05 1.7225E-05
S3 2.4784E-02 1.4577E-02 1.8396E-04 6.5013E-04 1.5114E-04 3.1044E-05 2.1379E-05
S4 6.3172E-02 1.4345E-02 1.3553E-03 6.7101E-04 2.0685E-04 6.2937E-05 2.5262E-05
S5 -8.5809E-02 -7.7469E-04 -3.4233E-04 2.4232E-04 9.2696E-05 6.0004E-05 1.8303E-05
S6 -1.7843E-01 1.9988E-03 2.5543E-03 2.4561E-03 1.2109E-03 5.8934E-04 1.7809E-04
S7 -3.7080E-01 2.7829E-03 -1.1401E-02 -2.9308E-03 2.1386E-03 2.8122E-03 1.3031E-03
S8 -4.2028E-01 1.1565E-01 -2.8671E-02 -8.4548E-03 4.8827E-03 1.4663E-03 -1.2193E-03
S9 -1.3572E+00 2.5215E-01 3.7514E-02 -4.2217E-02 1.1674E-02 3.2830E-03 -3.4247E-03
S10 -1.5769E+00 1.2943E-02 5.9418E-02 4.6875E-03 -2.0501E-04 4.0304E-03 -1.8781E-03
S11 -3.8188E+00 1.1826E+00 -3.5583E-01 1.0419E-01 -5.7372E-02 3.2822E-02 -9.8667E-03
S12 -6.7400E+00 1.2730E+00 -3.1426E-01 1.4518E-01 -6.7546E-02 1.5964E-02 -1.4444E-02
TABLE 10-1
Face number A18 A20 A22 A24 A26 A28
S1 -2.0723E-06 3.1485E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 9.9628E-06 6.1075E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 1.0392E-05 6.1501E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 1.1438E-05 2.4094E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S5 9.4530E-06 8.2136E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S6 3.7864E-05 -4.7253E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S7 3.8812E-04 2.8222E-06 -2.8105E-05 -4.4962E-05 0.0000E+00 0.0000E+00
S8 -8.8882E-05 4.5424E-04 1.8739E-04 -7.4414E-05 0.0000E+00 0.0000E+00
S9 6.0049E-05 3.3188E-04 4.8097E-05 -2.2222E-04 2.6563E-05 -5.5060E-05
S10 2.4270E-03 -1.3314E-03 2.1297E-04 -4.9653E-04 5.7593E-07 -9.0367E-05
S11 8.4129E-04 -1.6185E-03 2.6755E-03 -1.2466E-03 3.7208E-04 2.6212E-04
S12 9.2035E-03 -2.5163E-03 1.5878E-03 -7.9238E-04 6.9203E-05 -3.8666E-04
TABLE 10-2
Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve of the optical imaging lens of embodiment 5, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens provided in embodiment 5 can achieve good imaging quality.
Example 6
An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic structural diagram of an optical imaging lens according to embodiment 6 of the present application.
As shown in fig. 11, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, and filter E7.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. The optical imaging lens has an imaging surface S15, and light from an object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 11 shows basic parameters of the optical imaging lens of example 6, in which the unit of curvature radius and thickness/distance is millimeter (mm). Tables 12-1 and 12-2 show the higher order coefficients A that can be used for each of the aspherical mirror surfaces S1 to S12 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 profile can be defined by the formula (1) given in the above-described embodiment 1.
TABLE 11
Face number A4 A6 A8 A10 A12 A14 A16
S1 5.6615E-03 -2.5807E-03 -2.2160E-03 -1.0476E-03 -3.6214E-04 -1.2186E-04 -2.7400E-05
S2 -6.6906E-02 2.0854E-03 -1.6195E-03 -1.2190E-04 -5.2554E-06 -1.7742E-05 -1.5109E-05
S3 -1.6115E-02 1.5461E-02 -2.1978E-04 6.1714E-04 1.2984E-04 -2.0328E-05 -6.8524E-06
S4 3.5749E-02 1.3031E-02 1.2854E-03 7.2508E-04 2.2406E-04 6.6295E-05 1.6144E-05
S5 -1.7174E-01 -1.3062E-02 -8.3868E-04 5.8944E-04 4.2277E-04 2.1979E-04 1.2558E-04
S6 -2.9382E-01 -1.1810E-03 6.0899E-03 3.3587E-03 1.0403E-03 5.0673E-04 1.5947E-04
S7 -5.3843E-01 1.9143E-01 -4.4468E-02 -4.9175E-03 5.7389E-03 1.7180E-03 -2.3420E-03
S8 -8.8004E-01 3.4715E-01 -9.3163E-02 -3.6914E-03 9.2843E-03 2.3212E-03 -3.9563E-03
S9 -1.4768E+00 2.5871E-01 4.9171E-02 -1.0999E-02 -2.4219E-02 7.8812E-04 8.3991E-03
S10 2.8022E-01 4.6251E-02 -2.3648E-03 8.5463E-03 -1.0472E-02 2.0887E-03 2.4053E-03
S11 -2.1354E+00 1.1561E+00 -5.6449E-01 2.6817E-01 -1.2474E-01 5.3139E-02 -2.6492E-02
S12 -6.7309E+00 1.4950E+00 -4.1985E-01 2.6062E-01 -1.2412E-01 4.6330E-02 -3.6892E-02
TABLE 12-1
Face number A18 A20 A22 A24 A26 A28 A30
S1 -1.1758E-05 9.5129E-07 -2.5747E-06 3.7898E-06 2.9373E-06 2.4750E-06 -2.3196E-06
S2 -5.5028E-06 -5.8628E-06 4.6012E-07 2.4899E-07 4.7309E-06 3.1506E-06 2.2616E-06
S3 -1.0395E-05 -1.4054E-06 -4.1889E-06 -3.5292E-06 -2.7404E-06 1.9064E-06 2.3467E-07
S4 5.1757E-06 -2.5377E-06 8.3013E-07 2.7050E-06 6.1962E-06 2.2560E-06 -1.8958E-07
S5 5.2570E-05 3.4314E-05 7.5619E-06 5.5325E-06 -5.7676E-06 -3.4668E-06 -4.6598E-06
S6 2.4232E-05 -4.6384E-06 -2.0726E-05 -7.9841E-06 -1.4505E-05 -6.5177E-06 -8.0552E-06
S7 3.9029E-04 4.4389E-04 -1.7572E-04 -6.2451E-05 5.1768E-05 2.0889E-07 -2.7717E-05
S8 8.9726E-04 7.5272E-04 -3.7406E-04 -1.4741E-04 1.3144E-04 2.3585E-05 -5.1689E-05
S9 1.0622E-03 -1.8996E-03 -9.7721E-04 3.1773E-04 2.8677E-04 8.8837E-06 -5.7064E-05
S10 -2.3251E-03 4.6444E-04 5.8547E-04 2.8289E-05 -4.4787E-05 -5.6202E-05 -2.9564E-07
S11 1.3915E-02 -5.8380E-03 2.0822E-03 4.2117E-04 -5.4720E-04 5.3056E-04 -8.1476E-05
S12 1.3570E-02 -5.6794E-03 5.0239E-03 -5.4164E-04 2.0100E-03 3.4499E-04 6.9138E-04
TABLE 12-2
Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve of the optical imaging lens of embodiment 6, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 12C shows a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values corresponding to different image heights. Fig. 12D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens provided in embodiment 6 can achieve good imaging quality.
Further, in embodiments 1 to 6, the data of the distance TTL from the object side surface of the first lens of the optical imaging lens to the imaging surface of the optical imaging lens along the optical axis, half the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens, half the maximum field angle Semi-FOV of the optical imaging lens, the f-number Fno of the optical imaging lens, the effective focal length f of the optical imaging lens, and the focal length values f1 to f6 of the respective lenses are shown in table 13.
TABLE 13
The conditional expressions in examples 1 to 6 satisfy the conditions shown in table 14, respectively.
Condition/example 1 2 3 4 5 6
tan(Semi-FOV)×f 5.22 5.22 5.23 5.08 5.12 5.08
TTL/ImgH 1.15 1.15 1.13 1.17 1.17 1.17
f2/EPD -4.96 -4.98 -4.27 -4.79 -4.83 -4.53
DT32/T12 1.08 1.08 1.03 1.05 1.08 1.09
DT31/DT21 0.93 0.93 0.92 0.90 0.93 0.95
f1/f 0.81 0.81 0.85 0.79 0.79 0.86
CT6/CT5 0.96 1.03 0.54 1.03 0.99 0.54
DT22/DT42 0.54 0.53 0.53 0.57 0.57 0.52
f3/∣R5+R6∣ 1.28 0.47 1.65 0.35 1.73 0.14
SAG61/SAG62 0.70 0.72 0.99 0.87 0.89 0.96
ET1/CT1 0.34 0.34 0.31 0.33 0.33 0.34
R12/R11 0.58 0.58 0.12 0.57 0.55 0.08
(ET6-ET5)/(ET6+ET5) 0.07 0.23 0.25 0.45 0.38 0.08
CT5/(T45+T56) 0.76 0.77 0.74 0.65 0.70 0.54
T12/∑AT 0.11 0.11 0.07 0.10 0.10 0.06
TABLE 14
The application also provides an imaging device provided with an electron-sensitive element for imaging, which can be a photosensitive coupling element (Charge Coupled Device, CCD) or a complementary metal-oxide-semiconductor element (Complementary Metal Oxide Semiconductor, CMOS). The imaging device may be a stand alone imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a cell phone. The imaging device is equipped with the optical imaging lens described above.
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the application is not limited to the specific combination of the above technical features, but also encompasses other technical features which may be combined with any combination of the above technical features or their equivalents without departing from the spirit of the application. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.

Claims (24)

1. The optical imaging lens is characterized by sequentially comprising, from an object side to an image side along an optical axis:
a first lens having positive optical power;
a second lens having negative optical power;
a third lens having positive optical power, the object side surface of which is a convex surface;
a fourth lens having negative optical power;
a fifth lens having positive optical power; and
a sixth lens with negative focal power, the object side surface of which is a convex surface,
the optical imaging lens satisfies the following conditions:
TTL/ImgH＜1.2；
tan(Semi-FOV)×f＞5；
R12/R11 is more than or equal to 0.55 and less than 1; and
-6＜f2/EPD＜-3，
wherein TTL is a distance from an object side surface of the first lens to an imaging surface of the optical imaging lens along the optical axis, imgH is a half of a diagonal length of an effective pixel area on the imaging surface, semi-FOV is a half of a maximum field angle of the optical imaging lens, f is an effective focal length of the optical imaging lens, R12 is a radius of curvature of an image side surface of the sixth lens, R11 is a radius of curvature of an object side surface of the sixth lens, f2 is an effective focal length of the second lens, EPD is an entrance pupil diameter of the optical imaging lens;
the number of lenses having optical power in the optical imaging lens is six.
2. The optical imaging lens of claim 1, wherein a maximum effective radius DT22 of an image side surface of the second lens and a maximum effective radius DT42 of an image side surface of the fourth lens satisfy:
0＜DT22/DT42≤0.57。
3. The optical imaging lens of claim 1, wherein a maximum effective radius DT31 of an object-side surface of the third lens and a maximum effective radius DT21 of an object-side surface of the second lens satisfy:
0.8＜DT31/DT21＜1。
4. the optical imaging lens according to claim 1, wherein a maximum effective radius DT32 of an image side surface of the third lens and a separation distance T12 of the first lens and the second lens on the optical axis satisfy:
1＜DT32/T12＜1.2。
5. the optical imaging lens of claim 1, wherein an effective focal length f1 of the first lens and an effective focal length f of the optical imaging lens satisfy:
0.5＜f1/f＜1。
6. the optical imaging lens according to claim 1, wherein an edge thickness ET1 of the first lens and a center thickness CT1 of the first lens on the optical axis satisfy:
0＜ET1/CT1＜0.5。
7. the optical imaging lens of claim 1, wherein an edge thickness ET6 of the sixth lens and an edge thickness ET5 of the fifth lens satisfy:
0＜(ET6-ET5)/(ET6+ET5)≤0.45。
8. the optical imaging lens according to any one of claims 1 to 7, wherein a center thickness CT6 of the sixth lens on the optical axis and a center thickness CT5 of the fifth lens on the optical axis satisfy:
0＜CT6/CT5≤1.03。
9. The optical imaging lens according to any one of claims 1 to 7, wherein a center thickness CT5 of the fifth lens on the optical axis, a separation distance T45 of the fourth lens and the fifth lens on the optical axis, and a separation distance T56 of the fifth lens and the sixth lens on the optical axis satisfy:
0.3＜CT5/(T45+T56)＜0.9。
10. the optical imaging lens according to any one of claims 1 to 7, wherein a sum Σat of a separation distance T12 of the first lens and the second lens on the optical axis and a separation distance between any adjacent two lenses of the first lens to the fourth lens on the optical axis satisfies:
0＜T12/∑AT＜0.2。
11. the optical imaging lens according to any one of claims 1 to 7, wherein an on-axis distance SAG61 from an intersection of an object side surface of the sixth lens and an optical axis to an effective radius vertex of the object side surface of the sixth lens and an on-axis distance SAG62 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 satisfy:
0.5＜SAG61/SAG62＜1。
12. the optical imaging lens of any of claims 1 to 7, wherein an effective focal length f3 of the third lens, a radius of curvature R5 of an object-side surface of the third lens, and a radius of curvature R6 of an image-side surface of the third lens satisfy:
0＜f3/∣R5+R6∣＜2。
13. The optical imaging lens is characterized by sequentially comprising, from an object side to an image side along an optical axis:
a first lens having positive optical power;
a second lens having negative optical power;
a third lens having positive optical power, the object side surface of which is a convex surface;
a fourth lens having negative optical power;
a fifth lens having positive optical power; and
a sixth lens with negative focal power, the object side surface of which is a convex surface,
the optical imaging lens satisfies the following conditions:
TTL/ImgH＜1.2；
0.5＜f1/f＜1；
R12/R11 is more than or equal to 0.55 and less than 1; and
-6＜f2/EPD＜-3，
wherein TTL is a distance from an object side surface of the first lens to an imaging surface of the optical imaging lens along the optical axis, imgH is a half of a diagonal length of an effective pixel area on the imaging surface, f1 is an effective focal length of the first lens, f is an effective focal length of the optical imaging lens, R12 is a radius of curvature of an image side surface of the sixth lens, R11 is a radius of curvature of an object side surface of the sixth lens, f2 is an effective focal length of the second lens, EPD is an entrance pupil diameter of the optical imaging lens;
the number of lenses having optical power in the optical imaging lens is six.
14. The optical imaging lens of claim 13, wherein a maximum effective radius DT22 of an image side surface of the second lens and a maximum effective radius DT42 of an image side surface of the fourth lens satisfy:
0＜DT22/DT42≤0.57。
15. The optical imaging lens of claim 14, wherein half of a maximum field angle Semi-FOV of the optical imaging lens and an effective focal length f of the optical imaging lens satisfy:
tan(Semi-FOV)×f＞5。
16. the optical imaging lens of claim 13, wherein a maximum effective radius DT31 of an object-side surface of the third lens and a maximum effective radius DT21 of an object-side surface of the second lens satisfy:
0.8＜DT31/DT21＜1。
17. the optical imaging lens of claim 13, wherein a maximum effective radius DT32 of an image side surface of the third lens and a separation distance T12 of the first lens and the second lens on the optical axis satisfy:
1＜DT32/T12＜1.2。
18. the optical imaging lens of claim 13, wherein an edge thickness ET1 of the first lens and a center thickness CT1 of the first lens on the optical axis satisfy:
0＜ET1/CT1＜0.5。
19. the optical imaging lens of claim 13, wherein an edge thickness ET6 of the sixth lens and an edge thickness ET5 of the fifth lens satisfy:
0＜(ET6-ET5)/(ET6+ET5)≤0.45。
20. the optical imaging lens according to any one of claims 13 to 19, wherein a center thickness CT6 of the sixth lens on the optical axis and a center thickness CT5 of the fifth lens on the optical axis satisfy:
0＜CT6/CT5≤1.03。
21. The optical imaging lens according to any one of claims 13 to 19, wherein a center thickness CT5 of the fifth lens on the optical axis, a separation distance T45 of the fourth lens and the fifth lens on the optical axis, and a separation distance T56 of the fifth lens and the sixth lens on the optical axis satisfy:
0.3＜CT5/(T45+T56)＜0.9。
22. the optical imaging lens according to any one of claims 13 to 19, wherein a sum Σat of a separation distance T12 of the first lens and the second lens on the optical axis and a separation distance between any adjacent two lenses of the first lens to the fourth lens on the optical axis satisfies:
0＜T12/∑AT＜0.2。
23. the optical imaging lens of any of claims 13-19, wherein an on-axis distance SAG61 from an intersection of an object-side surface of the sixth lens and an optical axis to an effective radius vertex of the object-side surface of the sixth lens and an on-axis distance SAG62 from an intersection of an image-side surface of the sixth lens and an optical axis to an effective radius vertex of the image-side surface of the sixth lens satisfy:
0.5＜SAG61/SAG62＜1。
24. the optical imaging lens of any of claims 13 to 19, wherein an effective focal length f3 of the third lens, a radius of curvature R5 of an object-side surface of the third lens, and a radius of curvature R6 of an image-side surface of the third lens satisfy:
0＜f3/∣R5+R6∣＜2。
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