CN111458838A - Optical lens group - Google Patents

Optical lens group Download PDF

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Publication number
CN111458838A
CN111458838A CN202010296348.5A CN202010296348A CN111458838A CN 111458838 A CN111458838 A CN 111458838A CN 202010296348 A CN202010296348 A CN 202010296348A CN 111458838 A CN111458838 A CN 111458838A
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China
Prior art keywords
lens
optical
image
lens group
optical lens
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Granted
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CN202010296348.5A
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CN111458838B (en
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黄林
汤禹
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
    • G02B13/001—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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces

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

Abstract

The application discloses an optical lens group, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side to an image side along an optical axis, wherein the first lens has negative focal power, the second lens has focal power, the third lens has convex image side surface, the fourth lens has focal power, the image side surface is concave surface, the fifth lens has positive focal power, the image side surface is convex surface, the sixth lens has focal power, the object side surface is convex surface, the image side surface is concave surface, and the separation distance TT L between the effective radius DT11 of the object side surface of the first lens and the object side surface of the first lens to the imaging surface of the optical lens group on the optical axis satisfies DT11/TT L < 0.3.

Description

Optical lens group
Divisional application statement
The application is a divisional application of Chinese invention patent application with the invention name of 'optical lens group' and application number of 201910056968.9 filed on 1 month and 22 months in 2019.
Technical Field
The present application relates to an optical lens group, and more particularly, to an optical lens group including six lenses.
Background
In recent years, with the development of technology, portable electronic products have been increasingly developed, and in particular, portable electronic products having a high-performance image capturing function have been gaining favor in the market. In general, the photosensitive elements of the optical system are roughly classified into a photosensitive coupling device (CCD) and a Complementary Metal Oxide Semiconductor (CMOS) device. With the advancement of semiconductor process technology, the pixel size of the chip is smaller and smaller, which makes the imaging quality requirement for the associated optical system higher and higher.
A lens having a wide-angle characteristic can clearly photograph a wide range of scenes and has an advantage of acquiring a larger amount of information under the same conditions (for example, the same focal length) as compared with other types of lenses. Meanwhile, attention on the market is also increasing for lenses with small head sizes.
Disclosure of Invention
The present application provides an optical lens group applicable to portable electronic products, for example, an optical lens group having a wide angle characteristic, which can solve at least or partially at least one of the above-mentioned disadvantages of the related art.
In one aspect, the application provides an optical lens group which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side to an image side along an optical axis, wherein the first lens has negative focal power, the second lens has focal power, the third lens has focal power, the image side surface of the third lens is convex, the fourth lens has focal power, the image side surface of the fourth lens is concave, the fifth lens has positive focal power, the image side surface of the fifth lens is convex, the object side surface of the sixth lens is convex, and the image side surface of the sixth lens is concave, wherein an effective radius DT11 of the object side surface of the first lens and a distance L between the object side surface of the first lens and the imaging surface of the optical lens group on the optical axis can satisfy DT11/TT L < 0.3.
In one embodiment, the combined focal length f23 of the second and third lenses and the total effective focal length f of the optical lens group may satisfy 0.8 < f23/f < 1.3.
In one embodiment, the effective focal length f1 of the first lens and the total effective focal length f of the optical lens group can satisfy-5 < f1/f < -2.5.
In one embodiment, ImgH/f > 1.1 can be satisfied by half of the diagonal length of the effective pixel area on the imaging surface of the optical lens group and the total effective focal length f of the optical lens group.
In one embodiment, the radius of curvature R10 of the image-side surface of the fifth lens and the effective focal length f5 of the fifth lens can satisfy-0.7 < R10/f5 < -0.2.
In one embodiment, the radius of curvature R12 of the image-side surface of the sixth lens and the central thickness CT6 of the sixth lens on the optical axis may satisfy 1 < R12/CT6 < 1.5.
In one embodiment, a central thickness CT2 of the second lens on the optical axis and a central thickness CT5 of the fifth lens on the optical axis may satisfy 0.1 < CT2/CT5 < 0.6.
In one embodiment, an effective radius DT11 of the object-side surface of the first lens and an effective radius DT32 of the image-side surface of the third lens may satisfy 0.7 < DT11/DT32 < 1.
In one embodiment, an effective radius DT11 of an object-side surface of the first lens and an effective radius DT62 of an image-side surface of the sixth lens may satisfy 0.2 < DT11/DT62 < 0.5.
In one embodiment, an on-axis distance SAG52 between an intersection of an image-side surface of the fifth lens and the optical axis to a maximum effective radius vertex of the image-side surface of the fifth lens and a central thickness CT5 of the fifth lens on the optical axis may satisfy-0.8 < SAG52/CT5 < -0.5.
In one embodiment, a separation distance T23 on the optical axis of the second lens and the third lens, a separation distance T34 on the optical axis of the third lens and the fourth lens, and a separation distance T45 on the optical axis of the fourth lens and the fifth lens may satisfy 0 < (T23+ T34)/T45 < 0.5.
In one embodiment, a total sum ∑ CT of central thicknesses of the first lens to the sixth lens on the optical axis and a separation distance TD between an object side surface of the first lens and an image side surface of the sixth lens on the optical axis may satisfy 0.5 < ∑ CT/TD < 0.9.
In one embodiment, the optical lens group further includes a stop, and an interval distance SD between the stop and the image side surface of the sixth lens on the optical axis and an interval distance TT L between the object side surface of the first lens and the image plane of the optical lens group on the optical axis may satisfy 0.5 < SD/TT L < 0.8.
In one embodiment, a separation distance Tr3r8 on the optical axis from the object-side surface of the second lens to the image-side surface of the fourth lens and a separation distance Tr9r12 on the optical axis from the object-side surface of the fifth lens to the image-side surface of the sixth lens may satisfy 0.5 < Tr3r8/Tr9r12 < 1.
In one embodiment, the edge thickness ET2 of the second lens, the edge thickness ET3 of the third lens, the edge thickness ET4 of the fourth lens, and the edge thickness ET5 of the fifth lens may satisfy | ET2- (ET3+ ET4+ ET5)/3| < 0.15 mm.
In another aspect, the present application provides an optical lens assembly, in order from an object side to an image side along an optical axis, comprising: the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has negative focal power; the second lens has focal power; the third lens has focal power, and the image side surface of the third lens is a convex surface; the fourth lens has focal power; the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has focal power, and the object side surface of the sixth lens is a convex surface and the image side surface of the sixth lens is a concave surface. Wherein, one half of the diagonal length ImgH of the effective pixel region on the imaging surface of the optical lens group and the total effective focal length f of the optical lens group can satisfy ImgH/f > 1.1, and the on-axis distance SAG52 between the intersection point of the image side surface of the fifth lens and the optical axis to the maximum effective radius vertex of the image side surface of the fifth lens and the central thickness CT5 of the fifth lens on the optical axis can satisfy-0.8 < SAG52/CT5 < -0.5.
In another aspect, the present application provides an optical lens assembly, in order from an object side to an image side along an optical axis, comprising: the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has negative focal power; the second lens has focal power; the third lens has focal power, and the image side surface of the third lens is a convex surface; the fourth lens has focal power, and the image side surface of the fourth lens is a concave surface; the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has focal power, and the object side surface of the sixth lens is a convex surface and the image side surface of the sixth lens is a concave surface. The combined focal length f23 of the second lens and the third lens and the total effective focal length f of the optical lens group can satisfy 0.8 < f23/f < 1.3.
In another aspect, the present application provides an optical lens assembly, in order from an object side to an image side along an optical axis, comprising: the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has negative focal power; the second lens has focal power; the third lens has focal power, and the image side surface of the third lens is a convex surface; the fourth lens has focal power, and the image side surface of the fourth lens is a concave surface; the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has focal power, and the object side surface of the sixth lens is a convex surface and the image side surface of the sixth lens is a concave surface. The curvature radius R12 of the image side surface of the sixth lens and the central thickness CT6 of the sixth lens on the optical axis can satisfy 1 < R12/CT6 < 1.5.
In another aspect, the present application provides an optical lens assembly, in order from an object side to an image side along an optical axis, comprising: the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has negative focal power; the second lens has focal power; the third lens has focal power, and the image side surface of the third lens is a convex surface; the fourth lens has focal power, and the image side surface of the fourth lens is a concave surface; the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has focal power, and the object side surface of the sixth lens is a convex surface and the image side surface of the sixth lens is a concave surface. The effective radius DT11 of the object side surface of the first lens and the effective radius DT32 of the image side surface of the third lens can satisfy 0.7 < DT11/DT32 < 1.
In another aspect, the present application provides an optical lens assembly, in order from an object side to an image side along an optical axis, comprising: the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has negative focal power; the second lens has focal power; the third lens has focal power, and the image side surface of the third lens is a convex surface; the fourth lens has focal power, and the image side surface of the fourth lens is a concave surface; the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has focal power, and the object side surface of the sixth lens is a convex surface and the image side surface of the sixth lens is a concave surface. The effective radius DT11 of the object side surface of the first lens and the effective radius DT62 of the image side surface of the sixth lens can satisfy 0.2 < DT11/DT62 < 0.5.
In another aspect, the present application provides an optical lens assembly, in order from an object side to an image side along an optical axis, comprising: the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has negative focal power; the second lens has focal power; the third lens has focal power, and the image side surface of the third lens is a convex surface; the fourth lens has focal power, and the image side surface of the fourth lens is a concave surface; the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has focal power, and the object side surface of the sixth lens is a convex surface and the image side surface of the sixth lens is a concave surface. Wherein an on-axis distance SAG52 between an intersection point of the image-side surface of the fifth lens and the optical axis to a maximum effective radius vertex of the image-side surface of the fifth lens and a central thickness CT5 of the fifth lens on the optical axis satisfy-0.8 < SAG52/CT5 < -0.5.
In another aspect, the present application provides an optical lens assembly, in order from an object side to an image side along an optical axis, comprising: the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has negative focal power; the second lens has focal power; the third lens has focal power, and the image side surface of the third lens is a convex surface; the fourth lens has focal power, and the image side surface of the fourth lens is a concave surface; the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has focal power, and the object side surface of the sixth lens is a convex surface and the image side surface of the sixth lens is a concave surface. The edge thickness ET2 of the second lens, the edge thickness ET3 of the third lens, the edge thickness ET4 of the fourth lens and the edge thickness ET5 of the fifth lens can satisfy the condition that | ET2- (ET3+ ET4+ ET5)/3| < 0.15 mm.
The present application employs a plurality of (e.g., six) lenses, which have at least one advantageous effect of wide angle, small size, small head size, etc. by properly distributing the power of each lens, the surface type, the center thickness of each lens, and the on-axis distance between 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 when taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 shows a schematic structural diagram of an optical lens group 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 chromatic aberration of magnification curve, respectively, of the optical lens group of example 1;
fig. 3 shows a schematic structural diagram of an optical lens group 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 chromatic aberration of magnification curve, respectively, of the optical lens group of example 2;
FIG. 5 shows a schematic structural diagram of an optical lens group 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 chromatic aberration of magnification curve, respectively, of an optical lens group of example 3;
FIG. 7 shows a schematic structural diagram of an optical lens group 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 an optical lens group of example 4;
FIG. 9 shows a schematic structural diagram of an optical lens group 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 an optical lens group of example 5;
FIG. 11 shows a schematic structural diagram of an optical lens group according to embodiment 6 of the present application;
fig. 12A to 12D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of an optical lens group of example 6;
fig. 13 shows a schematic structural diagram of an optical lens group according to embodiment 7 of the present application;
fig. 14A to 14D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of an optical lens group of example 7;
FIG. 15 is a schematic diagram showing a structure of an optical lens group according to embodiment 8 of the present application;
fig. 16A to 16D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of an optical lens group of example 8;
fig. 17 shows a schematic structural diagram of an optical lens group according to embodiment 9 of the present application;
fig. 18A to 18D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of an optical lens group of example 9;
fig. 19 shows a schematic structural diagram of an optical lens group according to embodiment 10 of the present application;
fig. 20A to 20D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of an optical lens group of example 10;
fig. 21 is a schematic view showing a structure of an optical lens group according to embodiment 11 of the present application;
fig. 22A to 22D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of an optical lens group of example 11.
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. The surface of each lens close to the object side is called the object side surface of the lens, and the surface of each lens close to the image side is called 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 lens group according to an exemplary embodiment of the present application may include, for example, six lenses having optical powers, 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 arranged in order from the object side to the image side along the optical axis, and an air space is formed between every two adjacent lenses.
In an exemplary embodiment, the first lens may have a negative power; the second lens has positive focal power or negative focal power; the third lens has positive focal power or negative focal power, and the image side surface of the third lens can be a convex surface; the fourth lens has positive focal power or negative focal power, and the image side surface of the fourth lens can be a concave surface; the fifth lens can have positive focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has positive focal power or negative focal power, and the object side surface of the sixth lens is a convex surface while the image side surface of the sixth lens is a concave surface. The focal power of the fifth lens is designed to be positive, and the image side surface of the fifth lens is designed to be convex, so that aberration generated by the first lens can be effectively corrected, and the system performance is improved.
In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression-5 < f1/f < -2.5, where f1 is an effective focal length of the first lens and f is a total effective focal length of the optical lens group. More specifically, f1 and f can further satisfy-4.24. ltoreq. f 1/f. ltoreq-2.54.
In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression ImgH/f > 1.1, where ImgH is half of a diagonal length of an effective pixel area on an imaging surface of the optical lens group, and f is a total effective focal length of the optical lens group. More specifically, ImgH and f further satisfy 1.1 < ImgH/f < 1.5, e.g., 1.20. ltoreq. ImgH/f. ltoreq.1.24. The ratio of ImgH to f is reasonably set, so that the optical lens assembly has the characteristics of lightness, thinness and wide angle, and the visual field requirement of the portable electronic product is met.
In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression 0.8 < f23/f < 1.3, where f23 is a combined focal length of the second lens and the third lens, and f is a total effective focal length of the optical lens group. More specifically, f23 and f can further satisfy 0.91. ltoreq. f 23/f. ltoreq.1.21. The combined focal length of the second lens and the third lens is reasonably set, so that the field curvature of the optical lens group can be effectively balanced, the size of the optical lens group can be effectively controlled, and miniaturization is realized.
In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression-0.7 < R10/f5 < -0.2, where R10 is a radius of curvature of an image-side surface of the fifth lens and f5 is an effective focal length of the fifth lens. More specifically, R10 and f5 may further satisfy-0.55. ltoreq. R10/f 5. ltoreq.0.31. The curvature radius of the image side surface of the fifth lens is reasonably controlled, so that the astigmatism of the optical lens group can be effectively balanced, the back focal length of the lens group is shortened, and the miniaturization of the optical lens group is further ensured.
In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression 1 < R12/CT6 < 1.5, where R12 is a radius of curvature of an image-side surface of the sixth lens, and CT6 is a center thickness of the sixth lens on an optical axis. More specifically, R12 and CT6 can further satisfy 1.32. ltoreq. R12/CT 6. ltoreq.1.45. The ratio of the curvature radius of the image side surface of the sixth lens to the center thickness of the sixth lens on the optical axis is reasonably controlled, the size of the rear end of the lens group can be effectively reduced, the overlarge volume of the optical lens group is avoided, the assembly of the lens is facilitated, and the high space utilization rate is realized.
In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression 0 < (T23+ T34)/T45 < 0.5, where T23 is a separation distance of the second lens and the third lens on the optical axis, T34 is a separation distance of the third lens and the fourth lens on the optical axis, and T45 is a separation distance of the fourth lens and the fifth lens on the optical axis. More specifically, T23, T34 and T45 further can satisfy 0.18 ≦ (T23+ T34)/T45 ≦ 0.45. The reasonable distribution of T23 is the ratio of the distance between the second lens and the third lens on the optical axis plus the distance between the third lens and the fourth lens on the optical axis plus T34 and the distance between the fourth lens and the fifth lens on the optical axis plus T45, so that the lenses have enough space between them, thereby the freedom of lens surface change is higher, and the capability of the system for correcting astigmatism and curvature of field is improved.
In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression 0.5 < ∑ CT/TD < 0.9, where ∑ CT is a sum of central thicknesses of the first lens to the sixth lens on an optical axis, and TD is a distance between an object side surface of the first lens and an image side surface of the sixth lens on the optical axis, more specifically, ∑ CT and TD may further satisfy 0.76 ≦ ∑ CT/TD ≦ 0.81.
In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression 0.1 < CT2/CT5 < 0.6, where CT2 is a central thickness of the second lens on the optical axis and CT5 is a central thickness of the fifth lens on the optical axis. More specifically, CT2 and CT5 may further satisfy 0.20 ≦ CT2/CT5 ≦ 0.52. The central thickness of the second lens and the central thickness of the fifth lens are reasonably distributed, so that the size of the rear end of the system can be effectively reduced to ensure the miniaturization of the lens, and the assembly of the lens is facilitated.
In an exemplary embodiment, the optical lens group may further include at least one stop to improve the imaging quality of the lens. Alternatively, a diaphragm may be disposed between the first lens and the second lens.
In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression 0.5 < SD/TT L < 0.8, where SD is an interval distance between the diaphragm and the image side surface of the sixth lens on the optical axis, and TT L is an interval distance between the object side surface of the first lens and the image plane of the optical lens group on the optical axis.
In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression 0.5 < Tr3r8/Tr9r12 < 1, where Tr3r8 is a separation distance on an optical axis from an object-side surface of the second lens to an image-side surface of the fourth lens, and Tr9r12 is a separation distance on an optical axis from an object-side surface of the fifth lens to an image-side surface of the sixth lens. More specifically, Tr3r8 and Tr9r12 may further satisfy 0.58. ltoreq. Tr3r8/Tr9r 12. ltoreq.0.88. The reasonable distribution of the central thickness and the on-axis distance of each lens from the second lens to the sixth lens can ensure that each adjacent lens has enough space, thereby ensuring that the surface of the lens has higher freedom of change, and improving the capability of the system for correcting astigmatism and curvature of field.
In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression DT11/TT L < 0.3, where DT11 is the effective radius of the object side surface of the first lens, and TT L is the separation distance on the optical axis from the object side surface of the first lens to the image plane of the optical lens group, more specifically, DT11 and TT L may further satisfy 0.1 < DT11/TT L < 0.2, for example, 0.15 ≦ DT11/TT L ≦ 0.18.
In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression | ET2- (ET3+ ET4+ ET5)/3| < 0.15mm, where ET2 is the edge thickness of the second lens, ET3 is the edge thickness of the third lens, ET4 is the edge thickness of the fourth lens, and ET5 is the edge thickness of the fifth lens. More specifically, ET2, ET3, ET4 and ET5 can further satisfy 0.00mm ≦ ET2- (ET3+ ET4+ ET5)/3| ≦ 0.13 mm. The edge thickness of the second lens, the edge thickness of the third lens, the edge thickness of the fourth lens and the edge thickness of the fifth lens are reasonably controlled, so that the total length of the system is effectively reduced on the premise of meeting the machinability of the lens, and the system meets the light and thin characteristics.
In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression 0.7 < DT11/DT32 < 1, where DT11 is an effective radius of an object-side surface of the first lens and DT32 is an effective radius of an image-side surface of the third lens. More specifically, DT11 and DT32 may further satisfy 0.79 ≦ DT11/DT32 ≦ 0.96. The ratio of the effective radius of the object side surface of the first lens to the effective radius of the image side surface of the third lens is reasonably controlled, so that the convergence capacity of the optical lens group for light rays is improved, the light ray focusing position is adjusted, the total length of the system is shortened, and the miniaturization characteristic of the optical lens group is ensured.
In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression 0.2 < DT11/DT62 < 0.5, where DT11 is an effective radius of an object side surface of the first lens and DT62 is an effective radius of an image side surface of the sixth lens. More specifically, DT11 and DT62 may further satisfy 0.35 ≦ DT11/DT62 ≦ 0.41. The ratio of the effective radius of the object side surface of the first lens to the effective radius of the image side surface of the sixth lens is reasonably controlled, so that the field angle of the optical lens group is improved, and the characteristic of wide angle is realized. And moreover, the convergence capacity of the light can be improved, the focusing position of the light can be adjusted, and the total length of the system can be shortened.
In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression-0.8 < SAG52/CT5 < -0.5, where SAG52 is an on-axis distance between an intersection of an image-side surface of the fifth lens and the optical axis to a maximum effective radius vertex of the image-side surface of the fifth lens, and CT5 is a central thickness of the fifth lens on the optical axis. More specifically, SAG52 and CT5 further satisfy-0.76. ltoreq. SAG52/CT 5. ltoreq.0.61. The ratio of SAG52 and CT5 is reasonably controlled, the deflection angle of the main light beam can be reasonably controlled, the matching degree with a chip is improved, and the structure of the optical lens group is favorably adjusted.
Optionally, the optical lens group may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on an image forming surface.
The optical lens group according to the above-described 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 type, the central thickness of each lens, the on-axis distance between each lens and the like, the volume of the lens can be effectively reduced, the sensitivity of the lens can be reduced, and the machinability of the lens can be improved, so that the optical lens group is more beneficial to production and processing and can be suitable for portable electronic products. The optical lens group configured as above can also have the beneficial effects of wide angle, small size, small head size, etc. In addition, the optical lens group with the configuration can not only obtain ideal shooting visual field and good imaging effect, but also make the shot subject in a disordered environment stand out, and has higher imaging quality in a shooting angle range compared with similar products.
In the embodiment of the present application, at least one of the mirror surfaces of the respective lenses is an aspherical mirror surface, that is, at least one of 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 is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, each of the first, second, third, fourth, fifth, and sixth 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 lens group 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 six lenses are exemplified in the embodiment, the optical lens group is not limited to including six lenses. The optical lens group may also include other numbers of lenses, if desired.
Specific examples of optical lens groups applicable to the above embodiments are further described below with reference to the drawings.
Example 1
An optical lens group 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 lens group according to embodiment 1 of the present application.
As shown in fig. 1, an optical lens assembly according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave 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 positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 1 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of example 1, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0002452331400000081
TABLE 1
As can be seen from table 1, the object-side surface and the image-side surface of any one of the first lens element E1 through the sixth lens element E6 are aspheric. In the present embodiment, the profile x of each aspheric lens can be defined using, but not limited to, the following aspheric formula:
Figure BDA0002452331400000082
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex 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 is 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is the conic coefficient (given in table 1); ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1 to S12 used in example 14、A6、A8、A10、A12、A14、A16、A18And A20。
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 4.9080E-01 -8.5780E-01 5.9703E+00 -3.2457E+01 1.2359E+02 -3.0806E+02 4.8225E+02 -4.2792E+02 1.6403E+02
S2 9.6935E-01 -7.4008E+00 1.7051E+02 -2.3507E+03 2.0271E+04 -1.0870E+05 3.5320E+05 -6.3567E+05 4.8691E+05
S3 -3.3679E-03 -5.0008E-01 2.7562E+00 4.4602E+01 -9.4678E+02 7.0207E+03 -2.5523E+04 4.5887E+04 -3.2652E+04
S4 2.7665E-01 -5.6386E+00 4.7927E+01 -3.0542E+02 1.3570E+03 -4.0166E+03 7.5316E+03 -8.0107E+03 3.6432E+03
S5 2.9943E-01 -4.4126E+00 2.5876E+01 -1.0599E+02 3.0315E+02 -5.5955E+02 6.2694E+02 -3.8971E+02 1.0447E+02
S6 2.9190E-01 -2.7206E+00 1.4082E+01 -5.0877E+01 1.2757E+02 -2.0914E+02 2.0689E+02 -1.1007E+02 2.3881E+01
S7 -6.4568E-03 -1.9252E+00 1.1766E+01 -4.3585E+01 1.0630E+02 -1.6633E+02 1.5814E+02 -8.2493E+01 1.8045E+01
S8 -8.6431E-02 -7.3428E-02 1.5648E+00 -6.6710E+00 1.5257E+01 -2.0507E+01 1.6153E+01 -6.8821E+00 1.2212E+00
S9 1.0587E-02 1.6323E-02 -8.2107E-02 8.0422E-01 -2.7488E+00 4.4937E+00 -3.8765E+00 1.7283E+00 -3.1721E-01
S10 -2.8769E-01 5.6791E-01 -1.5992E+00 3.5572E+00 -5.4052E+00 5.4366E+00 -3.4563E+00 1.2542E+00 -1.9582E-01
S11 -1.0859E-01 1.5899E-02 -2.7274E-01 6.1309E-01 -6.9207E-01 4.5773E-01 -1.8062E-01 3.9430E-02 -3.6461E-03
S12 -7.8698E-02 -1.1416E-01 2.0426E-01 -1.7480E-01 9.1575E-02 -3.0600E-02 6.3695E-03 -7.5463E-04 3.8971E-05
TABLE 2
Table 3 gives the total optical length TT L of the optical lens group in example 1 (i.e., the distance on the optical axis from the center of the object-side surface S1 of the first lens E1 to the imaging surface S15), half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group, the maximum half field angle Semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of the respective lenses.
TTL(mm) 4.48 f2(mm) 2.47
ImgH(mm) 2.41 f3(mm) 7.79
Semi-FOV(°) 51.9 f4(mm) -4.00
f(mm) 1.94 f5(mm) 1.36
f1(mm) -8.25 f6(mm) -1.86
TABLE 3
The optical lens group in embodiment 1 satisfies:
f1/f is-4.24, wherein f1 is the effective focal length of the first lens E1, and f is the total effective focal length of the optical lens group;
ImgH/f is 1.24, where ImgH is half of the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group, and f is the total effective focal length of the optical lens group;
f23/f is 1.04, wherein f23 is the combined focal length of the second lens E2 and the third lens E3, and f is the total effective focal length of the optical lens group;
r10/f5 is-0.50, where R10 is the radius of curvature of the image-side surface S10 of the fifth lens E5, and f5 is the effective focal length of the fifth lens E5;
R12/CT6 is 1.38, where R12 is a radius of curvature of the image-side surface S12 of the sixth lens E6, and CT6 is a central thickness of the sixth lens E6 on the optical axis;
(T23+ T34)/T45 is 0.24, where T23 is an interval distance between the second lens E2 and the third lens E3 on the optical axis, T34 is an interval distance between the third lens E3 and the fourth lens E4 on the optical axis, and T45 is an interval distance between the fourth lens E4 and the fifth lens E5 on the optical axis;
∑ CT/TD is 0.70, where ∑ CT is the total of the central thicknesses of the first lens E1 to the sixth lens E6 on the optical axis, and TD is the distance between the object side surface S1 of the first lens E1 and the image side surface S12 of the sixth lens E6 on the optical axis;
CT2/CT5 is 0.48, where CT2 is the central thickness of the second lens E2 on the optical axis, and CT5 is the central thickness of the fifth lens E5 on the optical axis;
SD/TT L is 0.63, where SD is the distance between the stop STO and the image side surface S12 of the sixth lens E6 on the optical axis, and TT L is the distance between the object side surface S1 of the first lens E1 and the image plane S15 of the optical lens group on the optical axis;
tr3r8/Tr9r12 is 0.88, where Tr3r8 is an optical axis distance between the object side surface S3 of the second lens E2 and the image side surface S8 of the fourth lens E4, and Tr9r12 is an optical axis distance between the object side surface S9 of the fifth lens E5 and the image side surface S12 of the sixth lens E6;
DT11/TT L is 0.16, where DT11 is the effective radius of the object-side surface S1 of the first lens E1, and TT L is the separation distance on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S15 of the optical lens group;
i ET2- (ET3+ ET4+ ET5)/3 i 0.01mm, wherein ET2 is the edge thickness of the second lens E2, ET3 is the edge thickness of the third lens E3, ET4 is the edge thickness of the fourth lens E4, and ET5 is the edge thickness of the fifth lens E5;
DT11/DT32 is 0.83, where DT11 is the effective radius of the object-side surface S1 of the first lens E1, and DT32 is the effective radius of the image-side surface S6 of the third lens E3;
DT11/DT62 is 0.37, where DT11 is the effective radius of the object-side surface S1 of the first lens E1, and DT62 is the effective radius of the image-side surface S12 of the sixth lens E6;
SAG52/CT5 is-0.71, where SAG52 is an on-axis distance between an intersection point of the image-side surface S10 of the fifth lens E5 and the optical axis to a maximum effective radius vertex of the image-side surface S10 of the fifth lens E5, and CT5 is a center thickness of the fifth lens E5 on the optical axis.
Fig. 2A shows an on-axis chromatic aberration curve of the optical lens group of example 1, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve representing meridional and sagittal image planes of the optical lens group of example 1. Fig. 2C shows a distortion curve of the optical lens group of example 1, which represents distortion magnitude values corresponding to different angles of view. Fig. 2D shows a chromatic aberration of magnification curve of the optical lens group of example 1, which represents a deviation of different image heights on an image plane after light passes through the lens. As can be seen from fig. 2A to 2D, the optical lens assembly of embodiment 1 can achieve good imaging quality.
Example 2
An optical lens group 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 lens group according to embodiment 2 of the present application.
As shown in fig. 3, an optical lens assembly according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S3 and a convex image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 4 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of example 2, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0002452331400000101
Figure BDA0002452331400000111
TABLE 4
As is clear from table 4, in example 2, both the object-side surface and the image-side surface of any one of the first lens element E1 through the sixth lens element E6 are aspheric. Table 5 shows high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 5.4435E-01 -7.6902E-01 4.4887E+00 -2.3375E+01 8.5487E+01 -1.9711E+02 2.7343E+02 -2.0671E+02 6.4785E+01
S2 9.0867E-01 -3.1443E+00 4.5817E+01 -4.0839E+02 2.3283E+03 -8.1653E+03 1.6980E+04 -1.8837E+04 8.3864E+03
S3 -1.1352E-02 -8.4646E-01 2.6268E+00 -4.7747E+01 5.7529E+02 -3.5383E+03 1.1442E+04 -1.8250E+04 1.1301E+04
S4 2.0082E-01 -6.4434E+00 3.5422E+01 -1.6339E+02 6.2954E+02 -1.4978E+03 1.4806E+03 6.9119E+02 -1.7659E+03
S5 4.1001E-01 -5.9762E+00 3.1068E+01 -1.3937E+02 5.4351E+02 -1.4321E+03 2.2607E+03 -1.9341E+03 6.9136E+02
S6 2.4015E-01 -7.6926E-01 -6.5678E+00 4.6908E+01 -1.4427E+02 2.6767E+02 -3.0617E+02 1.9535E+02 -5.2494E+01
S7 3.6458E-02 -5.2828E-01 -3.7058E+00 2.0771E+01 -3.8891E+01 3.0573E+01 -3.0739E+00 -9.1068E+00 3.7496E+00
S8 -1.2516E-01 8.3790E-01 -5.2405E+00 1.6313E+01 -2.7884E+01 2.8407E+01 -1.7457E+01 6.0445E+00 -9.1860E-01
S9 4.1197E-02 -1.2020E-01 -1.2263E-01 1.8495E+00 -6.2113E+00 1.0459E+01 -9.3324E+00 4.2328E+00 -7.7343E-01
S10 -2.4302E-01 3.9499E-01 -1.1703E+00 2.8122E+00 -4.4827E+00 4.5693E+00 -2.8781E+00 1.0226E+00 -1.5541E-01
S11 -1.3085E-01 -1.0954E-01 5.5772E-02 2.4917E-01 -5.0760E-01 4.4187E-01 -2.0721E-01 5.1402E-02 -5.2889E-03
S12 -1.6712E-01 4.0358E-02 5.8398E-02 -8.6606E-02 5.6456E-02 -2.1456E-02 4.8842E-03 -6.2008E-04 3.3923E-05
TABLE 5
Table 6 gives the total optical length TT L of the optical lens group, half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group, the maximum half field angle Semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of the respective lenses in example 2.
TTL(mm) 4.50 f2(mm) -588.18
ImgH(mm) 2.41 f3(mm) 1.99
Semi-FOV(°) 52.3 f4(mm) -4.83
f(mm) 1.99 f5(mm) 1.34
f1(mm) -7.79 f6(mm) -1.60
TABLE 6
Fig. 4A shows an on-axis chromatic aberration curve of the optical lens group of example 2, which represents a 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 lens group of example 2. Fig. 4C shows a distortion curve of the optical lens group of example 2, which represents distortion magnitude values corresponding to different angles of view. Fig. 4D shows a chromatic aberration of magnification curve of the optical lens group of example 2, which represents a deviation of different image heights on an image plane after light passes through the lens. As can be seen from fig. 4A to 4D, the optical lens assembly of embodiment 2 can achieve good imaging quality.
Example 3
An optical lens group 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 lens group according to embodiment 3 of the present application.
As shown in fig. 5, an optical lens assembly according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave 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 negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 7 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of example 3, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0002452331400000121
TABLE 7
As is clear from table 7, in example 3, both the object-side surface and the image-side surface of any one of the first lens element E1 through the sixth lens element E6 are aspheric. Table 8 shows high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 4.5692E-01 -2.2390E-01 -3.3064E-01 6.4406E+00 -3.0008E+01 7.8737E+01 -1.2130E+02 1.0389E+02 -3.9358E+01
S2 8.1730E-01 -2.4023E+00 4.9767E+01 -5.6709E+02 4.1736E+03 -1.8946E+04 5.1758E+04 -7.7072E+04 4.8064E+04
S3 -2.0830E-02 -1.1740E+00 2.3890E+01 -3.4175E+02 2.9962E+03 -1.6516E+04 5.5220E+04 -1.0205E+05 8.0309E+04
S4 9.6683E-02 -1.0748E+00 1.4183E+00 -2.8737E+01 3.1653E+02 -1.5396E+03 3.8832E+03 -5.0602E+03 2.7463E+03
S5 2.6893E-01 -1.0409E+00 -7.6131E+00 5.3704E+01 -1.1480E+02 -3.7305E+01 5.3751E+02 -7.8690E+02 3.6777E+02
S6 -9.5685E-02 2.7388E+00 -2.3848E+01 1.0199E+02 -2.4975E+02 3.6044E+02 -2.9824E+02 1.2674E+02 -1.9850E+01
S7 -1.0405E-01 -2.4986E-02 -3.8517E+00 2.2389E+01 -5.7310E+01 8.1943E+01 -6.8770E+01 3.2326E+01 -6.8616E+00
S8 -1.2869E-01 4.2753E-01 -2.1849E+00 7.5182E+00 -1.4812E+01 1.7539E+01 -1.2421E+01 4.8513E+00 -8.0562E-01
S9 5.0143E-02 -2.3685E-01 8.9591E-01 -2.5538E+00 5.0760E+00 -6.6336E+00 5.4303E+00 -2.4769E+00 4.7351E-01
S10 -2.5933E-01 2.6130E-01 -2.7831E-01 2.4627E-01 -1.9167E-01 1.3230E-01 -5.8436E-02 6.5903E-03 3.5647E-03
S11 -1.8737E-01 1.1285E-01 -2.5708E-01 4.6634E-01 -5.4579E-01 3.9930E-01 -1.7738E-01 4.3594E-02 -4.5007E-03
S12 -1.4827E-01 6.6642E-02 -1.0587E-02 -1.6257E-02 1.5505E-02 -6.8324E-03 1.6938E-03 -2.2751E-04 1.2964E-05
Table 9 gives the total optical length TT L of the optical lens group, half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group, the maximum half field angle Semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of the respective lenses in example 3.
TTL(mm) 4.49 f2(mm) 1.87
ImgH(mm) 2.41 f3(mm) -500.40
Semi-FOV(°) 52.1 f4(mm) -5.58
f(mm) 1.98 f5(mm) 1.27
f1(mm) -5.75 f6(mm) -1.52
TABLE 9
Fig. 6A shows an on-axis chromatic aberration curve of the optical lens group of example 3, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve representing meridional and sagittal image planes curvature of the optical lens group of example 3. Fig. 6C shows a distortion curve of the optical lens group of example 3, which represents distortion magnitude values corresponding to different angles of view. Fig. 6D shows a chromatic aberration of magnification curve of the optical lens group of example 3, which represents a deviation of different image heights on an image plane after light passes through the lens. As can be seen from fig. 6A to 6D, the optical lens assembly of embodiment 3 can achieve good imaging quality.
Example 4
An optical lens group 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 lens group according to embodiment 4 of the present application.
As shown in fig. 7, an optical lens assembly according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave 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 positive 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 concave image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 10 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of example 4, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0002452331400000131
Figure BDA0002452331400000141
Watch 10
As is clear from table 10, in example 4, both the object-side surface and the image-side surface of any of the first lens element E1 through the sixth lens element E6 are aspheric. Table 11 shows high-order term coefficients that can be used for each aspherical mirror surface in embodiment 4, wherein each aspherical mirror surface type can be defined by the formula (1) given in embodiment 1 above.
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 3.9316E-01 -1.6422E-01 -4.0117E-01 4.6728E+00 -1.9018E+01 4.5626E+01 -6.5058E+01 5.1291E+01 -1.7305E+01
S2 7.5331E-01 -9.7313E-01 1.9083E+01 -1.3345E+02 2.8826E+02 2.7927E+03 -2.1522E+04 5.8897E+04 -5.8569E+04
S3 4.4726E-02 -2.4021E+00 5.3078E+01 -7.3798E+02 6.3042E+03 -3.3782E+04 1.0998E+05 -1.9792E+05 1.5080E+05
S4 -1.3088E-01 8.2034E-01 -7.7285E+00 1.3778E+01 4.8195E+00 -3.0387E+00 -1.5915E+02 3.4196E+02 -1.8455E+02
S5 2.4381E-02 1.8509E+00 -1.4386E+01 4.9013E+01 -1.5844E+02 4.7065E+02 -8.9711E+02 9.1044E+02 -3.7525E+02
S6 -1.2611E+00 1.0771E+01 -5.5623E+01 2.0727E+02 -5.7368E+02 1.1118E+03 -1.3755E+03 9.5414E+02 -2.7935E+02
S7 -4.1333E-02 -2.3427E+00 1.1972E+01 -3.4424E+01 5.9614E+01 -5.4628E+01 1.3403E+01 1.5443E+01 -9.6092E+00
S8 3.2079E-01 -3.2708E+00 1.2669E+01 -2.9817E+01 4.6455E+01 -4.7598E+01 3.0692E+01 -1.1286E+01 1.8039E+00
S9 -7.4686E-02 9.7234E-01 -4.5594E+00 1.1238E+01 -1.6044E+01 1.3717E+01 -6.6800E+00 1.5736E+00 -1.0405E-01
S10 -3.4933E-01 6.8566E-01 -1.6470E+00 3.0550E+00 -4.0165E+00 3.5008E+00 -1.8439E+00 5.1081E-01 -5.1912E-02
S11 -1.6067E-01 5.5390E-02 -3.9379E-01 9.4453E-01 -1.2447E+00 1.0036E+00 -4.8874E-01 1.3080E-01 -1.4628E-02
S12 -5.4392E-02 -1.1681E-01 1.9594E-01 -1.7160E-01 9.5232E-02 -3.4078E-02 7.5816E-03 -9.5307E-04 5.1774E-05
TABLE 11
Table 12 gives the total optical length TT L of the optical lens group, half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group, the maximum half field angle Semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of the respective lenses in example 4.
TTL(mm) 4.50 f2(mm) 2.27
ImgH(mm) 2.41 f3(mm) 1841.82
Semi-FOV(°) 52.0 f4(mm) 500.01
f(mm) 1.95 f5(mm) 1.09
f1(mm) -5.45 f6(mm) -1.17
TABLE 12
Fig. 8A shows an on-axis chromatic aberration curve of the optical lens group of example 4, which represents a 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 lens group of example 4. Fig. 8C shows a distortion curve of the optical lens group of example 4, which represents distortion magnitude values corresponding to different angles of view. Fig. 8D shows a chromatic aberration of magnification curve of the optical lens group of example 4, which represents a deviation of different image heights on an image plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical lens assembly of embodiment 4 can achieve good imaging quality.
Example 5
An optical lens group 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 lens group according to embodiment 5 of the present application.
As shown in fig. 9, an optical lens assembly according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave 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 positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 13 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of example 5, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0002452331400000151
Watch 13
As is clear from table 13, in example 5, both the object-side surface and the image-side surface of any one of the first lens element E1 through the sixth lens element E6 are aspheric. Table 14 shows high-order term coefficients that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Figure BDA0002452331400000152
Figure BDA0002452331400000161
TABLE 14
Table 15 gives the total optical length TT L of the optical lens group, half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group, the maximum half field angle Semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of the respective lenses in example 5.
TTL(mm) 4.53 f2(mm) 2.37
ImgH(mm) 2.41 f3(mm) 5.84
Semi-FOV(°) 52.0 f4(mm) -4.52
f(mm) 1.98 f5(mm) 5.00
f1(mm) -6.65 f6(mm) 31.63
Watch 15
Fig. 10A shows an on-axis chromatic aberration curve of the optical lens group of example 5, which represents a 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 lens group of example 5. Fig. 10C shows a distortion curve of the optical lens group of example 5, which represents distortion magnitude values corresponding to different angles of view. Fig. 10D shows a chromatic aberration of magnification curve of the optical lens group of example 5, which represents a deviation of different image heights on an image plane after light passes through the lens. As can be seen from fig. 10A to 10D, the optical lens assembly of embodiment 5 can achieve good imaging quality.
Example 6
An optical lens group 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 lens group according to embodiment 6 of the present application.
As shown in fig. 11, an optical lens assembly according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave 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 positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 16 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of example 6, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0002452331400000162
Figure BDA0002452331400000171
TABLE 16
As is clear from table 16, in example 6, both the object-side surface and the image-side surface of any one of the first lens element E1 through the sixth lens element E6 are aspheric. Table 17 shows high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 5.9992E-01 -9.5822E-01 2.5070E+00 -6.1654E+00 1.1589E+01 -1.5353E+01 1.3607E+01 -7.6927E+00 2.1590E+00
S2 9.7462E-01 -2.2987E+00 2.7447E+01 -2.4720E+02 1.5696E+03 -6.4526E+03 1.6563E+04 -2.4093E+04 1.5261E+04
S3 -1.7575E-02 1.5808E-01 -1.1091E+01 1.6122E+02 -1.3192E+03 6.4008E+03 -1.8375E+04 2.8942E+04 -1.9148E+04
S4 1.3996E-01 -2.6731E+00 8.3937E+00 -3.0898E+01 2.4468E+02 -1.2103E+03 2.9661E+03 -3.5296E+03 1.6909E+03
S5 3.6667E-01 -3.1274E+00 5.3691E+00 1.6341E+01 -3.9170E+01 -1.8251E+02 7.2737E+02 -8.8329E+02 3.6112E+02
S6 1.0133E-02 9.9775E-01 -1.1952E+01 5.6504E+01 -1.2989E+02 1.4533E+02 -5.8517E+01 -2.1360E+01 1.9332E+01
S7 -1.1950E-01 1.6327E-01 -6.3292E+00 3.7577E+01 -1.0620E+02 1.7372E+02 -1.7234E+02 9.7942E+01 -2.4758E+01
S8 -1.3703E-01 7.0821E-01 -4.1748E+00 1.4753E+01 -3.0425E+01 3.8177E+01 -2.8910E+01 1.2268E+01 -2.2730E+00
S9 2.9733E-02 -4.7428E-01 2.7533E+00 -9.4603E+00 2.0533E+01 -2.8342E+01 2.4073E+01 -1.1334E+01 2.2415E+00
S10 -2.7120E-01 3.2256E-01 -6.4237E-01 1.3896E+00 -2.2672E+00 2.4107E+00 -1.5551E+00 5.4811E-01 -7.8798E-02
S11 -2.0839E-01 1.4351E-01 -3.5142E-01 7.1435E-01 -9.2703E-01 7.3637E-01 -3.4801E-01 8.9576E-02 -9.6022E-03
S12 -1.9242E-01 1.3054E-01 -6.7708E-02 1.6048E-02 4.2521E-03 -4.5533E-03 1.4760E-03 -2.2865E-04 1.4369E-05
TABLE 17
Table 18 gives the total optical length TT L of the optical lens group, half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group, the maximum half field angle Semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of the respective lenses in example 6.
TTL(mm) 4.49 f2(mm) 2.42
ImgH(mm) 2.41 f3(mm) 5.37
Semi-FOV(°) 52.1 f4(mm) -5.31
f(mm) 1.98 f5(mm) 1.32
f1(mm) -5.01 f6(mm) -1.58
Watch 18
Fig. 12A shows an on-axis chromatic aberration curve of the optical lens group of example 6, which represents a 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 lens group of example 6. Fig. 12C shows a distortion curve of the optical lens group of example 6, which represents distortion magnitude values corresponding to different angles of view. Fig. 12D shows a chromatic aberration of magnification curve of the optical lens group of example 6, which represents a deviation of different image heights on an image plane after light passes through the lens. As can be seen from fig. 12A to 12D, the optical lens assembly according to embodiment 6 can achieve good imaging quality.
Example 7
An optical lens group according to embodiment 7 of the present application is described below with reference to fig. 13 to 14D. Fig. 13 shows a schematic structural diagram of an optical lens group according to embodiment 7 of the present application.
As shown in fig. 13, an optical lens assembly according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has negative 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 positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 19 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of example 7, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0002452331400000181
Watch 19
As is clear from table 19, in example 7, both the object-side surface and the image-side surface of any one of the first lens element E1 through the sixth lens element E6 are aspheric. Table 20 shows high-order term coefficients that can be used for each aspherical mirror surface in example 7, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Figure BDA0002452331400000182
Figure BDA0002452331400000191
Watch 20
Table 21 gives the total optical length TT L of the optical lens group, half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group, the maximum half field angle Semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of the respective lenses in example 7.
TTL(mm) 4.50 f2(mm) 3.57
ImgH(mm) 2.41 f3(mm) 3.71
Semi-FOV(°) 52.0 f4(mm) -5.84
f(mm) 2.00 f5(mm) 1.35
f1(mm) -6.43 f6(mm) -1.63
TABLE 21
Fig. 14A shows on-axis chromatic aberration curves of the optical lens group of example 7, which represent convergent focus deviations of light rays of different wavelengths after passing through the lens. Fig. 14B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical lens group of example 7. Fig. 14C shows a distortion curve of the optical lens group of example 7, which represents distortion magnitude values corresponding to different angles of view. Fig. 14D shows a chromatic aberration of magnification curve of the optical lens group of example 7, which represents a deviation of different image heights on an image plane after light passes through the lens. As can be seen from fig. 14A to 14D, the optical lens assembly of embodiment 7 can achieve good imaging quality.
Example 8
An optical lens group according to embodiment 8 of the present application is described below with reference to fig. 15 to 16D. Fig. 15 shows a schematic structural diagram of an optical lens group according to embodiment 8 of the present application.
As shown in fig. 15, an optical lens assembly according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave 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 positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 22 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of example 8, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0002452331400000192
Figure BDA0002452331400000201
TABLE 22
As can be seen from table 22, in example 8, both the object-side surface and the image-side surface of any one of the first lens element E1 through the sixth lens element E6 are aspheric. Table 23 shows high-order term coefficients that can be used for each aspherical mirror surface in embodiment 8, wherein each aspherical mirror surface type can be defined by the formula (1) given in embodiment 1 above.
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 4.1615E-01 2.4126E-01 -4.7755E+00 3.4241E+01 -1.4072E+02 3.6143E+02 -5.6933E+02 5.0591E+02 -1.9516E+02
S2 7.3681E-01 1.4577E+00 -3.7134E+01 6.0089E+02 -5.6268E+03 3.2879E+04 -1.1575E+05 2.2472E+05 -1.8341E+05
S3 -3.2269E-02 -5.2262E-01 6.7307E+00 -1.0274E+02 1.1173E+03 -7.8208E+03 3.1943E+04 -6.8074E+04 5.8625E+04
S4 6.4026E-02 -1.8840E-01 -1.5252E+01 1.5501E+02 -9.0980E+02 3.4557E+03 -8.2532E+03 1.1065E+04 -6.2212E+03
S5 1.7343E-01 -1.3005E+00 3.1560E+00 -3.1892E+01 2.6935E+02 -1.0896E+03 2.2619E+03 -2.3350E+03 9.5093E+02
S6 1.2247E-01 -2.2088E-01 -2.4567E+00 1.0507E+01 -5.1172E+00 -4.5458E+01 1.0308E+02 -8.8093E+01 2.7689E+01
S7 -1.3515E-01 3.0320E-01 -4.3552E+00 1.9690E+01 -4.2573E+01 5.0181E+01 -3.2542E+01 1.0576E+01 -1.2831E+00
S8 -9.5894E-02 3.5422E-01 -1.9099E+00 5.6721E+00 -9.0440E+00 8.0863E+00 -3.8613E+00 7.9428E-01 -1.9033E-02
S9 3.7295E-02 -1.5893E-01 7.1458E-01 -2.3849E+00 4.9487E+00 -6.1818E+00 4.6499E+00 -1.9409E+00 3.4322E-01
S10 -2.2122E-01 1.2934E-01 4.5154E-02 -3.1956E-01 4.7282E-01 -3.6172E-01 1.5549E-01 -3.5568E-02 4.5645E-03
S11 -1.6553E-01 1.8504E-01 -6.1683E-01 1.1201E+00 -1.2202E+00 8.2431E-01 -3.3839E-01 7.7071E-02 -7.4239E-03
S12 -9.9113E-02 -5.3348E-02 1.3082E-01 -1.2121E-01 6.6771E-02 -2.3207E-02 4.9836E-03 -6.0543E-04 3.1950E-05
TABLE 23
Table 24 gives the total optical length TT L of the optical lens group, half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group, the maximum half field angle Semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of the respective lenses in example 8.
TTL(mm) 4.50 f2(mm) 2.31
ImgH(mm) 2.41 f3(mm) 8.76
Semi-FOV(°) 52.1 f4(mm) -4.67
f(mm) 1.97 f5(mm) 1.28
f1(mm) -7.07 f6(mm) -1.61
Watch 24
Fig. 16A shows an on-axis chromatic aberration curve of the optical lens group of example 8, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 16B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical lens group of example 8. Fig. 16C shows a distortion curve of the optical lens group of example 8, which represents distortion magnitude values corresponding to different angles of view. Fig. 16D shows a chromatic aberration of magnification curve of the optical lens group of example 8, which represents a deviation of different image heights on an image plane after light passes through the lens. As can be seen from fig. 16A to 16D, the optical lens assembly of embodiment 8 can achieve good imaging quality.
Example 9
An optical lens group according to embodiment 9 of the present application is described below with reference to fig. 17 to 18D. Fig. 17 shows a schematic structural diagram of an optical lens group according to embodiment 9 of the present application.
As shown in fig. 17, an optical lens assembly according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave 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 positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 25 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of example 9, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0002452331400000211
TABLE 25
As is clear from table 25, in example 9, both the object-side surface and the image-side surface of any one of the first lens element E1 through the sixth lens element E6 are aspheric. Table 26 shows high-order term coefficients that can be used for each aspherical mirror surface in example 9, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 5.4092E-01 -7.6735E-01 3.5457E+00 -1.6312E+01 5.7838E+01 -1.3754E+02 2.0380E+02 -1.6819E+02 5.8518E+01
S2 9.1047E-01 -2.6208E+00 4.2354E+01 -4.5937E+02 3.3963E+03 -1.6098E+04 4.6982E+04 -7.6608E+04 5.3694E+04
S3 -1.0860E-01 4.5551E+00 -1.3652E+02 2.0929E+03 -1.9655E+04 1.1575E+05 -4.1601E+05 8.3364E+05 -7.1322E+05
S4 4.0279E-02 -3.6035E+00 9.1187E+00 2.4481E+01 -3.9153E+02 2.3398E+03 -7.5038E+03 1.2393E+04 -8.2903E+03
S5 3.1061E-01 -4.5479E+00 2.5724E+01 -1.4304E+02 6.2461E+02 -1.6629E+03 2.5363E+03 -2.0535E+03 6.8491E+02
S6 5.2455E-02 9.1412E-02 -7.8620E+00 4.9737E+01 -1.6698E+02 3.4480E+02 -4.2628E+02 2.8450E+02 -7.8174E+01
S7 1.1109E-01 -1.4733E+00 2.1835E+00 1.4691E+00 -4.7399E+00 -8.1494E-01 8.0064E+00 -6.5237E+00 1.5943E+00
S8 -4.0239E-02 2.0675E-01 -3.0119E+00 1.1967E+01 -2.3956E+01 2.8979E+01 -2.1833E+01 9.4807E+00 -1.8120E+00
S9 -8.9510E-02 9.8217E-01 -4.7690E+00 1.4035E+01 -2.7336E+01 3.4610E+01 -2.6635E+01 1.1204E+01 -1.9725E+00
S10 -2.9264E-01 8.6216E-01 -2.9832E+00 6.9790E+00 -1.0702E+01 1.0594E+01 -6.5154E+00 2.2627E+00 -3.3696E-01
S11 2.0503E-01 -9.0081E-01 1.3357E+00 -1.3622E+00 9.2739E-01 -3.9678E-01 9.3097E-02 -7.2579E-03 -5.9924E-04
S12 6.2277E-02 -2.9122E-01 3.4287E-01 -2.4482E-01 1.1440E-01 -3.5104E-02 6.8176E-03 -7.6120E-04 3.7334E-05
Watch 26
Table 27 gives the total optical length TT L of the optical lens group, half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group, the maximum half field angle Semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of the respective lenses in example 9.
TTL(mm) 4.49 f2(mm) 56.18
ImgH(mm) 2.41 f3(mm) 2.04
Semi-FOV(°) 52.4 f4(mm) -6.19
f(mm) 2.00 f5(mm) 0.97
f1(mm) -6.64 f6(mm) -1.01
Watch 27
Fig. 18A shows an on-axis chromatic aberration curve of an optical lens group of example 9, which represents a convergent focus deviation of light rays of different wavelengths after passing through a lens. Fig. 18B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical lens group of example 9. Fig. 18C shows a distortion curve of the optical lens group of example 9, which represents distortion magnitude values corresponding to different angles of view. Fig. 18D shows a chromatic aberration of magnification curve of the optical lens group of example 9, which represents a deviation of different image heights on an image plane after light passes through the lens. As can be seen from fig. 18A to 18D, the optical lens assembly according to embodiment 9 can achieve good imaging quality.
Examples10
An optical lens group according to embodiment 10 of the present application is described below with reference to fig. 19 to 20D. Fig. 19 shows a schematic structural diagram of an optical lens group according to embodiment 10 of the present application.
As shown in fig. 19, an optical lens assembly according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave 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 positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 28 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of example 10, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0002452331400000231
Watch 28
As is clear from table 28, in example 10, both the object-side surface and the image-side surface of any one of the first lens element E1 through the sixth lens element E6 are aspheric. Table 29 shows high-order term coefficients that can be used for each aspherical mirror surface in example 10, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 4.3888E-01 2.7101E-03 -2.5808E+00 2.2128E+01 -9.8363E+01 2.6634E+02 -4.3445E+02 3.9456E+02 -1.5443E+02
S2 7.7779E-01 -4.7312E-01 4.9049E+00 6.8430E+01 -1.3903E+03 1.1544E+04 -4.9606E+04 1.0977E+05 -9.8054E+04
S3 -3.0676E-02 -2.2171E+00 5.1676E+01 -7.6222E+02 6.8246E+03 -3.7974E+04 1.2756E+05 -2.3639E+05 1.8592E+05
S4 2.8314E-01 -4.7654E+00 3.3428E+01 -1.9441E+02 8.6218E+02 -2.7272E+03 5.5979E+03 -6.6409E+03 3.5054E+03
S5 4.3193E-01 -5.1991E+00 2.9437E+01 -1.3368E+02 4.8631E+02 -1.2770E+03 2.1290E+03 -1.9467E+03 7.3484E+02
S6 5.9260E-01 -4.8579E+00 1.9186E+01 -5.5971E+01 1.4425E+02 -2.9302E+02 3.8542E+02 -2.8008E+02 8.4930E+01
S7 2.5498E-01 -3.2608E+00 1.1197E+01 -2.3163E+01 3.9934E+01 -6.2773E+01 7.2324E+01 -4.7858E+01 1.3203E+01
S8 -4.5088E-02 -1.1833E-01 -3.5237E-01 2.8426E+00 -6.0552E+00 6.5669E+00 -3.9578E+00 1.2629E+00 -1.6956E-01
S9 6.8284E-02 -4.3012E-01 1.6421E+00 -4.7226E+00 9.0143E+00 -1.0656E+01 7.5967E+00 -2.9935E+00 4.9858E-01
S10 -2.2569E-01 1.3707E-01 -7.3124E-02 6.6876E-02 -1.8875E-01 2.8823E-01 -2.0971E-01 7.2466E-02 -7.9489E-03
S11 -1.9145E-01 1.4029E-01 -3.4965E-01 6.4268E-01 -7.5344E-01 5.5124E-01 -2.4358E-01 5.9136E-02 -6.0049E-03
S12 -1.6598E-01 8.4484E-02 -2.4533E-02 -8.5599E-03 1.2826E-02 -6.2140E-03 1.5908E-03 -2.1549E-04 1.2252E-05
Watch 29
Table 30 gives the total optical length TT L of the optical lens group, half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group, the maximum half field angle Semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of the respective lenses in example 10.
Figure BDA0002452331400000232
Figure BDA0002452331400000241
Watch 30
Fig. 20A shows an on-axis chromatic aberration curve of the optical lens group of example 10, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 20B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical lens group of example 10. Fig. 20C shows a distortion curve of the optical lens group of example 10, which represents distortion magnitude values corresponding to different angles of view. Fig. 20D shows a chromatic aberration of magnification curve of the optical lens group of example 10, which represents a deviation of different image heights on an image plane after light passes through the lens. As can be seen from fig. 20A to 20D, the optical lens assembly of embodiment 10 can achieve good imaging quality.
Example 11
An optical lens group according to embodiment 11 of the present application is described below with reference to fig. 21 to 22D. Fig. 21 shows a schematic structural diagram of an optical lens group according to embodiment 11 of the present application.
As shown in fig. 21, an optical lens assembly according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave 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 positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 31 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of example 11, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0002452331400000242
Watch 31
As can be seen from table 31, in example 11, both the object-side surface and the image-side surface of any one of the first lens element E1 through the sixth lens element E6 are aspheric. Table 32 shows high-order term coefficients that can be used for each aspherical mirror surface in example 11, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 4.7699E-01 -2.8968E-01 2.1283E-01 3.9947E+00 -2.2606E+01 6.6854E+01 -1.1493E+02 1.1063E+02 -4.7355E+01
S2 8.0823E-01 -2.1694E+00 3.7499E+01 -3.4840E+02 2.0170E+03 -6.5698E+03 1.0323E+04 -2.0283E+03 -9.4736E+03
S3 -6.9256E-02 -1.4000E+00 3.4329E+01 -5.8480E+02 5.9242E+03 -3.7106E+04 1.3963E+05 -2.8986E+05 2.5542E+05
S4 6.0315E-02 -2.3979E+00 2.0019E+01 -1.7528E+02 1.0874E+03 -4.2732E+03 9.9727E+03 -1.2677E+04 6.8005E+03
S5 3.3151E-01 -2.7611E+00 8.7580E+00 -2.9975E+01 1.5567E+02 -6.0050E+02 1.2249E+03 -1.1843E+03 4.2325E+02
S6 3.9931E-01 -2.2648E+00 3.8831E+00 -5.4934E+00 4.6363E+01 -1.8830E+02 3.3483E+02 -2.7905E+02 9.0197E+01
S7 -3.3913E-03 -9.2136E-01 1.0531E+00 1.9272E+00 1.5130E+00 -2.3921E+01 4.2886E+01 -3.0010E+01 7.0286E+00
S8 -2.1571E-01 1.1922E+00 -5.4226E+00 1.5910E+01 -2.8984E+01 3.3464E+01 -2.4139E+01 9.9998E+00 -1.8271E+00
S9 2.1005E-02 -1.6497E-01 6.0488E-01 -1.0981E+00 1.1983E+00 -7.8407E-01 3.0544E-01 -6.7557E-02 6.8308E-03
S10 -2.5115E-01 3.4672E-01 -6.7062E-01 1.2348E+00 -1.6732E+00 1.5529E+00 -9.1669E-01 3.0699E-01 -4.3645E-02
S11 -2.1510E-01 8.5096E-02 -1.7462E-01 3.8670E-01 -4.9890E-01 3.8000E-01 -1.7181E-01 4.2580E-02 -4.4142E-03
S12 -1.8388E-01 9.5633E-02 -2.0276E-02 -1.7706E-02 1.8435E-02 -8.1525E-03 1.9999E-03 -2.6464E-04 1.4811E-05
Watch 32
Table 33 gives the total optical length TT L of the optical lens group, half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group, the maximum half field angle Semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of the respective lenses in example 11.
TTL(mm) 4.50 f2(mm) 2.23
ImgH(mm) 2.41 f3(mm) 22.96
Semi-FOV(°) 52.0 f4(mm) -4.78
f(mm) 1.96 f5(mm) 1.25
f1(mm) -5.74 f6(mm) -1.52
Watch 33
Fig. 22A shows on-axis chromatic aberration curves of the optical lens group of example 11, which represent convergent focus deviations of light rays of different wavelengths after passing through the lens. Fig. 22B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical lens group of example 11. Fig. 22C shows a distortion curve of the optical lens group of example 11, which represents distortion magnitude values corresponding to different angles of view. Fig. 22D shows a chromatic aberration of magnification curve of the optical lens group of example 11, which represents a deviation of different image heights on an image plane after light passes through the lens. As can be seen from fig. 22A to 22D, the optical lens assembly of embodiment 11 can achieve good imaging quality.
In summary, examples 1 to 11 satisfy the relationship shown in table 34, respectively.
Figure BDA0002452331400000251
Figure BDA0002452331400000261
Figure BDA0002452331400000262
Watch 34
The present application also provides an image pickup apparatus, wherein the electronic photosensitive element may be a photosensitive coupling element (CCD) or a Complementary Metal Oxide Semiconductor (CMOS). The camera device may be a stand-alone camera device such as a digital camera, or may be a camera module integrated on a mobile electronic device such as a mobile phone. The image pickup apparatus is equipped with the optical lens group 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 the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (10)

1. The optical lens assembly, in order from an object side to an image side along an optical axis, comprises: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens,
the first lens has a negative optical power;
the second lens has optical power;
the third lens has focal power, and the image side surface of the third lens is a convex surface;
the fourth lens has focal power, and the image side surface of the fourth lens is a concave surface;
the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface;
the sixth lens has focal power, and the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a concave surface; and
the separation distance TT L between the effective radius DT11 of the object side surface of the first lens and the imaging surface of the optical lens group on the optical axis meets DT11/TT L < 0.3.
2. The optical lens group of claim 1, wherein the combined focal length f23 of the second and third lenses and the total effective focal length f of the optical lens group satisfy 0.8 < f23/f < 1.3.
3. The optical lens group of claim 1 wherein the effective focal length f1 of the first lens and the total effective focal length f of the optical lens group satisfy-5 < f1/f < -2.5.
4. The optical lens assembly of claim 1, wherein ImgH/f > 1.1 is satisfied by ImgH, which is half the diagonal length of the effective pixel area on the imaging surface of the optical lens assembly, and the total effective focal length f of the optical lens assembly.
5. The optical lens group of claim 1, wherein the radius of curvature of the image-side surface of the fifth lens, R10, and the effective focal length of the fifth lens, f5, satisfy-0.7 < R10/f5 < -0.2.
6. The optical lens group of claim 1, wherein a radius of curvature R12 of an image-side surface of the sixth lens and a center thickness CT6 of the sixth lens on the optical axis satisfy 1 < R12/CT6 < 1.5.
7. The optical lens group of claim 1, wherein a central thickness CT2 of the second lens on the optical axis and a central thickness CT5 of the fifth lens on the optical axis satisfy 0.1 < CT2/CT5 < 0.6.
8. An optical lens group according to claim 1, characterized in that the effective radius DT11 of the object side surface of the first lens and the effective radius DT32 of the image side surface of the third lens satisfy 0.7 < DT11/DT32 < 1.
9. An optical lens group according to claim 1, characterized in that the effective radius DT11 of the object side surface of the first lens and the effective radius DT62 of the image side surface of the sixth lens satisfy 0.2 < DT11/DT62 < 0.5.
10. The optical lens assembly, in order from an object side to an image side along an optical axis, comprises: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens,
the first lens has a negative optical power;
the second lens has optical power;
the third lens has focal power, and the image side surface of the third lens is a convex surface;
the fourth lens has optical power;
the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface;
the sixth lens has focal power, and the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a concave surface;
the half of the diagonal length of an effective pixel area on an imaging surface of the optical lens group, namely ImgH, and the total effective focal length f of the optical lens group meet the condition that ImgH/f is more than 1.1; and
an on-axis distance SAG52 between an intersection point of an image-side surface of the fifth lens and the optical axis to a maximum effective radius vertex of the image-side surface of the fifth lens and a center thickness CT5 of the fifth lens on the optical axis satisfy-0.8 < SAG52/CT5 < -0.5.
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