CN107656358B - Optical lens - Google Patents

Optical lens Download PDF

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CN107656358B
CN107656358B CN201711089909.9A CN201711089909A CN107656358B CN 107656358 B CN107656358 B CN 107656358B CN 201711089909 A CN201711089909 A CN 201711089909A CN 107656358 B CN107656358 B CN 107656358B
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lens
optical
focal length
optical lens
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CN107656358A (en
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杨健
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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Priority to PCT/CN2018/095985 priority patent/WO2019091137A1/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses

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Abstract

The application discloses an optical lens, which comprises the following components in sequence from an object side to an image side along an optical axis: the lens includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens. Wherein the first lens has positive focal power; the second lens has negative focal power; the third lens has positive focal power; the fourth lens has positive focal power or negative focal power, and the image side surface of the fourth lens is a convex surface; the fifth lens has negative focal power; and the combined focal length f1234 of the first lens, the second lens, the third lens and the fourth lens and the separation distance T45 of the fourth lens and the fifth lens on the optical axis satisfy f1234/T45 < 4.0.

Description

Optical lens
Technical Field
The present application relates to an optical lens, and more particularly, to an optical lens including five lenses.
Background
With the continuous development of portable electronic products such as smart phones, the application of the dual-camera technology is more and more popular. In the telephoto lens, one telephoto lens is generally arranged. In order to meet the trend of portable electronic products toward ultra-thin and small-sized products, higher and higher requirements are also put forward on the telephoto lens, and the telephoto lens needs to have a telephoto characteristic and a small-sized product.
Disclosure of Invention
The present application provides an optical lens, e.g., a telephoto lens, applicable to a portable electronic product, which may solve at least or partially at least one of the above-mentioned disadvantages of the related art.
In one aspect, the present application provides an optical lens, 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 and a fifth lens. Wherein the first lens may have a positive optical power; the second lens may have a negative optical power; the third lens may have a positive optical power; the fourth lens has positive focal power or negative focal power, and the image side surface of the fourth lens can be a convex surface; the fifth lens may have a negative power; and the combined focal length f1234 of the first lens, the second lens, the third lens and the fourth lens and the separation distance T45 of the fourth lens and the fifth lens on the optical axis can satisfy f1234/T45 < 4.0.
In one embodiment, the diameter EPD of the entrance pupil of the optical lens and the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical lens can satisfy EPD/ImgH ≦ 0.7.
In one embodiment, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens can satisfy-1.0. Ltoreq. F1/f 2. Ltoreq.0.5.
In one embodiment, the effective focal length f3 of the third lens and the effective focal length f5 of the fifth lens can satisfy-4.0 < f3/f5 < -1.5.
In one embodiment, the curvature radius R8 of the image side surface of the fourth lens and the effective focal length f5 of the fifth lens can satisfy 0.2 ≦ R8/f5 ≦ 0.8.
In one embodiment, the effective focal length f5 of the fifth lens is spaced from the optical axis of the fourth and fifth lenses by a distance T45 satisfying-5.5 < f5/T45 < -3.5.
In one embodiment, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R4 of the image-side surface of the second lens can satisfy 0 ≦ R1/R4 ≦ 0.6.
In one embodiment, the radius of curvature R7 of the object-side surface of the fourth lens element and the radius of curvature R10 of the image-side surface of the fifth lens element can satisfy-0.7 ≦ -R7/R10 ≦ -0.2.
In one embodiment, the angle of incidence β 5 of the rays on the image-side surface of the fifth lens element at the maximum field of view may satisfy 3 ° < β 5 < 16 °.
In one embodiment, the maximum effective semi-caliber DT8 of the image side surface of the fourth lens and the maximum effective semi-caliber DT9 of the object side surface of the fifth lens can satisfy 0.4 ≦ DT8/DT9 ≦ 0.8.
In one embodiment, the total optical length TTL of the optical lens and the total effective focal length f of the optical lens satisfy TTL/f ≦ 1.0.
In another aspect, the present application provides an optical lens, 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 and a fifth lens. Wherein the first lens may have a positive optical power; the second lens may have a negative optical power; the third lens may have a positive optical power; the fourth lens has positive focal power or negative focal power, and the image side surface of the fourth lens can be a convex surface; the fifth lens may have a negative optical power; and the incidence angle beta 5 of the light rays on the image side surface of the fifth lens at the maximum field of view can satisfy 3 degrees < beta 5 < 16 degrees.
The optical lens adopts a plurality of lenses (for example, five lenses), and has at least one beneficial effect of ultra-thinness, miniaturization, long focus, low sensitivity, high imaging quality and the like 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.
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 according to embodiment 1 of the present application;
fig. 2A to 2D respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the optical lens of embodiment 1;
fig. 3 shows a schematic structural diagram of an optical lens according to embodiment 2 of the present application;
fig. 4A to 4D respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the optical lens of embodiment 2;
fig. 5 shows a schematic structural diagram of an optical lens according to embodiment 3 of the present application;
fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical lens of embodiment 3;
fig. 7 shows a schematic structural diagram of an optical lens according to embodiment 4 of the present application;
fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of an optical lens of embodiment 4;
fig. 9 is a schematic structural view showing an optical lens according to embodiment 5 of the present application;
fig. 10A to 10D respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the optical lens of embodiment 5;
fig. 11 is a schematic structural view showing an optical lens according to embodiment 6 of the present application;
fig. 12A to 12D respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of an optical lens of embodiment 6;
fig. 13 is a schematic structural view showing an optical lens according to embodiment 7 of the present application;
fig. 14A to 14D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of an optical lens of example 7, respectively;
fig. 15 schematically shows the angle of incidence β 5 of a ray on the image-side surface of the fifth lens at maximum field of view.
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 closest to the object is called the object side surface, and the surface of each lens closest to the image plane is called the image side surface.
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.
An optical lens according to an exemplary embodiment of the present application may include, for example, five lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The five lenses are arranged in sequence from the object side to the image side along the optical axis.
In an exemplary embodiment, the first lens may have a positive optical power; the second lens may have a negative optical power; the third lens may have a positive optical power; the fourth lens has positive focal power or negative focal power, and the image side surface of the fourth lens is a convex surface; the fifth lens may have a negative optical power.
In an exemplary embodiment, at least one of the object-side surface and the image-side surface of the first lens may be convex. Alternatively, the object side surface of the first lens may be convex.
In an exemplary embodiment, at least one of the object-side surface and the image-side surface of the second lens may be a concave surface. Alternatively, the image side surface of the second lens may be concave.
In an exemplary embodiment, the object-side surface of the fourth lens element may be concave, and the image-side surface may be convex.
In an exemplary embodiment, at least one of the object-side surface and the image-side surface of the fifth lens may be a concave surface. Alternatively, the image side surface of the fifth lens may be concave.
In an exemplary embodiment, the optical lens of the present application may satisfy the conditional expression EPD/ImgH ≦ 0.7, where EPD is an entrance pupil diameter of the optical lens, and ImgH is a half of a diagonal length of an effective pixel region on an imaging surface of the optical lens. More specifically, EPD and ImgH may further satisfy 0.60 ≦ EPD/ImgH ≦ 0.68. The requirement of the conditional expression EPD/ImgH is less than or equal to 0.7, which is beneficial to reducing the front end caliber and realizing the front end miniaturization on the basis of ensuring the performance of the long-focus system.
In an exemplary embodiment, the optical lens of the present application may satisfy the conditional expression f1234/T45 < 4.0, where f1234 is a combined focal length of the first lens, the second lens, the third lens, and the fourth lens, and T45 is a separation distance between the fourth lens and the fifth lens on an optical axis. More specifically, f1234 and T45 may further satisfy 2.8 < f1234/T45 < 4.0, e.g., 2.92. Ltoreq. F1234/T45. Ltoreq.3.85. The focal power of each lens is reasonably distributed, and the optical performance of the lens is favorably improved. The requirement that the conditional expression f1234/T45 is less than 4.0 is met, and the front-end aperture is reduced and the front-end miniaturization is realized on the basis of ensuring the performance of a long coke system.
In an exemplary embodiment, the optical lens of the present application may satisfy the conditional expression TTL/f ≦ 1.0, where TTL is an optical total length of the optical lens (i.e., a distance on an optical axis from a center of an object-side surface of the first lens to an imaging surface of the optical lens), and f is a total effective focal length of the optical lens. More specifically, TTL and f can further satisfy 0.95 ≦ TTL/f ≦ 0.98. The condition formula TTL/f is less than or equal to 1.0, so that the miniaturization characteristic of the lens can be kept while the long-focus characteristic is met.
In an exemplary embodiment, the optical lens of the present application may satisfy the conditional expression-5.5 < f5/T45 < -3.5, where f5 is an effective focal length of the fifth lens and T45 is a separation distance between the fourth lens and the fifth lens on an optical axis. More specifically, f5 and T45 further satisfy-5.2 < f5/T45 < -3.7, for example, -5.17. Ltoreq. F5/T45. Ltoreq.3.71. By reasonably arranging f5 and T45, the curvature of field and optical distortion of the lens can be effectively corrected.
In an exemplary embodiment, the optical lens of the present application may satisfy the conditional expression-1.0 ≦ f1/f2 ≦ -0.5, where f1 is an effective focal length of the first lens and f2 is an effective focal length of the second lens. More specifically, f1 and f2 further can satisfy-0.75. Ltoreq. F1/f 2. Ltoreq.0.55, e.g., -0.70. Ltoreq. F1/f 2. Ltoreq.0.59. The effective focal lengths of the first lens and the second lens are reasonably distributed, so that the sensitivity of the lens can be effectively reduced.
In an exemplary embodiment, the optical lens of the present application may satisfy the conditional expression-4.0 < f3/f5 < -1.5, where f3 is an effective focal length of the third lens and f5 is an effective focal length of the fifth lens. More specifically, f3 and f5 further satisfy-3.8 < f3/f5 < -1.7, for example, -3.72. Ltoreq. F3/f 5. Ltoreq-1.74. The effective focal lengths of the third lens and the fifth lens are reasonably distributed, so that the chromatic aberration of the lens is reduced, and the optical performance of the lens is improved.
In an exemplary embodiment, the optical lens of the present application may satisfy the conditional expression 0.2 ≦ R8/f5 ≦ 0.8, where R8 is a radius of curvature of an image side surface of the fourth lens, and f5 is an effective focal length of the fifth lens. More specifically, R8 and f5 further satisfy 0.22. Ltoreq. R8/f 5. Ltoreq.0.77. R8 and f5 are reasonably arranged, so that coma aberration of the lens can be effectively reduced, and the optical performance of the lens is improved.
In an exemplary embodiment, the optical lens of the present application may satisfy the conditional expression-0.7 ≦ R7/R10 ≦ -0.2, where R7 is a radius of curvature of the object-side surface of the fourth lens and R10 is a radius of curvature of the image-side surface of the fifth lens. More specifically, R7 and R10 may further satisfy-0.63. Ltoreq. R7/R10. Ltoreq-0.27. The reasonable arrangement of R7 and R10 is beneficial to better matching of the lens and the Chief Ray Angle (CRA) of the chip.
In an exemplary embodiment, the optical lens of the present application may satisfy the conditional expression 0 ≦ R1/R4 ≦ 0.6, where R1 is a radius of curvature of an object-side surface of the first lens and R4 is a radius of curvature of an image-side surface of the second lens. More specifically, R1 and R4 may further satisfy 0.17. Ltoreq. R1/R4. Ltoreq.0.52. The reasonable arrangement of R1 and R4 is favorable for reducing the spherical aberration of the lens and improving the optical performance of the lens.
In an exemplary embodiment, the optical lens of the present application may satisfy the conditional expression 0.4 ≦ DT8/DT9 ≦ 0.8, where DT8 is a maximum effective half aperture of an image side surface of the fourth lens, and DT9 is a maximum effective half aperture of an object side surface of the fifth lens. More specifically, DT8 and DT9 further may satisfy 0.50 ≦ DT8/DT9 ≦ 0.75, for example, 0.54 ≦ DT8/DT9 ≦ 0.70. The conditional expression of more than or equal to 0.4 and less than or equal to 0.8 of DT8/DT9 is satisfied, the aperture of the fourth lens can be effectively reduced, and the miniaturization of the front end of the lens is further realized.
In an exemplary embodiment, the optical lens of the present application may satisfy the conditional expression 3 ° < β 5 < 16 °, where β 5 is an incident angle of a light ray on an image side surface of the fifth lens at the maximum field of view (see fig. 15). More specifically, β 5 can further satisfy 3.8 ° ≦ β 5 ≦ 15.0 °. The condition that beta 5 is more than 3 degrees and less than 16 degrees is met, the relative brightness of the imaging system is favorably improved, and ghost images generated by the fifth lens are favorably weakened.
In an exemplary embodiment, the optical lens may further include at least one stop to improve the imaging quality of the lens. The stop may be disposed at any position as needed, for example, the stop may be disposed between the object side and the first lens.
Optionally, the optical lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on an image plane.
The optical lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, five lenses as described above. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the axial 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 is more beneficial to production and processing and can be suitable for portable electronic products. Meanwhile, the optical lens with the configuration has the beneficial effects of ultrathin thickness, long focus, high imaging quality and the like.
In the embodiment of the present application, the mirror surface of each 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.
However, it will be understood by those skilled in the art that the number of lenses constituting the optical lens may be varied to obtain the respective results and advantages described in the present specification without departing from the technical solutions claimed in the present application. For example, although five lenses are exemplified in the embodiment, the optical lens is not limited to include five lenses. The optical lens may also include other numbers of lenses, if desired.
Example 1
An optical lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic structural diagram of an optical lens according to embodiment 1 of the present application.
As shown in fig. 1, an optical lens according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6, and image plane S13.
The first lens E1 has positive focal power, and the object side surface S1 and the image side surface S2 are convex surfaces; the second lens E2 has negative focal power, and the object side surface S3 and the image side surface S4 are concave surfaces; the third lens E3 has positive focal power, the object side surface S5 of the third lens is a concave surface, and the image side surface S6 of the third lens is a convex surface; the fourth lens element E4 has negative focal power, and has a concave object-side surface S7 and a convex image-side surface S8; the fifth lens element E5 has a negative refractive power, and has a concave object-side surface S9 and a concave image-side surface S10. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging plane S13.
Table 1 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens of example 1, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0001460947150000081
Figure BDA0001460947150000091
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 to the fifth lens element E5 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 BDA0001460947150000092
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 =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 coefficients A of the higher-order terms which can be used for the aspherical mirror surfaces S1 to S10 in example 1 4 、A 6 、A 8 、A 10 、A 12 、A 14 And A 16 。
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 1.7077E-02 -9.6800E-03 6.7702E-02 -1.4894E-01 1.6452E-01 -8.9140E-02 1.1413E-02
S2 -3.4990E-02 6.7739E-02 -5.1480E-02 -8.5010E-02 1.9822E-01 -1.7186E-01 5.5561E-02
S3 -8.1040E-02 3.9660E-01 -6.8659E-01 7.4950E-01 -4.0493E-01 3.8703E-02 5.6508E-02
S4 1.7158E-02 2.6393E-01 -4.9050E-01 5.8167E-01 -2.6216E-01 -9.1040E-02 1.4157E-01
S5 -1.6265E-01 -3.4600E-03 1.0759E-02 -6.5280E-01 1.2957E+00 -9.5116E-01 2.3126E-01
S6 -1.5834E-01 7.7674E-02 -7.3000E-03 -2.4104E-01 6.6730E-01 -7.2448E-01 2.9558E-01
S7 -5.0239E-01 1.4528E+00 -2.1825E+00 2.6119E+00 -2.3168E+00 1.1718E+00 -2.3898E-01
S8 -2.0988E-01 6.2201E-01 -5.6535E-01 2.8572E-01 -1.0508E-01 3.0455E-02 -4.7600E-03
S9 -1.2545E-01 8.1757E-02 -3.9550E-02 1.2366E-02 -2.2100E-03 2.0900E-04 -8.1000E-06
S10 -9.4640E-02 5.0077E-02 -2.1250E-02 5.6940E-03 -9.4000E-04 8.6600E-05 -3.4000E-06
TABLE 2
Table 3 gives the total effective focal length f of the optical lens, the effective focal lengths f1 to f5 of the respective lenses, the total optical length TTL of the optical lens (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 S13), and the maximum half field angle HFOV of the optical lens in embodiment 1.
Figure BDA0001460947150000093
Figure BDA0001460947150000101
TABLE 3
The optical lens in embodiment 1 satisfies:
EPD/ImgH =0.62, where EPD is the entrance pupil diameter of the optical lens and ImgH is half the diagonal length of the effective pixel area on the imaging surface of the optical lens;
f1234/T45=2.92, where f1234 is a combined focal length of the first lens E1, the second lens E2, the third lens E3, and the fourth lens E4, and T45 is a separation distance between the fourth lens E4 and the fifth lens E5 on the optical axis;
TTL/f =0.97, where TTL is the total optical length of the optical lens, and f is the total effective focal length of the optical lens;
f5/T45= -3.71, wherein f5 is an effective focal length of the fifth lens E5, and T45 is a separation distance between the fourth lens E4 and the fifth lens E5 on an optical axis;
f1/f2= -0.61, wherein f1 is the effective focal length of the first lens E1, and f2 is the effective focal length of the second lens E2;
f3/f5= -2.03, wherein f3 is the effective focal length of the third lens E3, and f5 is the effective focal length of the fifth lens E5;
r8/f5=0.24, where R8 is a radius of curvature of the image-side surface S8 of the fourth lens E4, and f5 is an effective focal length of the fifth lens E5;
R7/R10= -0.27, where R7 is a radius of curvature of the object-side surface S7 of the fourth lens E4, and R10 is a radius of curvature of the image-side surface S10 of the fifth lens E5;
R1/R4=0.23, where R1 is a radius of curvature of the object-side surface S1 of the first lens E1, and R4 is a radius of curvature of the image-side surface S4 of the second lens E2;
DT8/DT9=0.54, where DT8 is the maximum effective half-aperture of the image-side surface S8 of the fourth lens element E4, and DT9 is the maximum effective half-aperture of the object-side surface S9 of the fifth lens element E5;
β 5=9.8 °, where β 5 is the angle of incidence of a ray on the image-side surface S10 of the fifth lens E5 at the maximum field of view.
In addition, fig. 2A shows an on-axis chromatic aberration curve of the optical lens of embodiment 1, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 2B shows astigmatism curves representing meridional field curvature and sagittal field curvature of the optical lens of embodiment 1. Fig. 2C shows a distortion curve of the optical lens of embodiment 1, which represents the distortion magnitude values in the case of different angles of view. Fig. 2D shows a chromatic aberration of magnification curve of the optical lens of embodiment 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 system of embodiment 1 can achieve good imaging quality.
Example 2
An optical lens according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 3 shows a schematic structural diagram of an optical lens according to embodiment 2 of the present application.
As shown in fig. 3, an optical lens according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6, and image plane S13.
The first lens E1 has positive focal power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface; the second lens E2 has negative focal power, and the object side surface S3 and the image side surface S4 are concave surfaces; the third lens E3 has positive focal power, and the object side surface S5 and the image side surface S6 are convex surfaces; the fourth lens element E4 has negative focal power, and has a concave object-side surface S7 and a convex image-side surface S8; the fifth lens element E5 has a negative refractive power, and has a concave object-side surface S9 and a concave image-side surface S10. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging plane S13.
Table 4 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens of example 2, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0001460947150000111
Figure BDA0001460947150000121
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 to the fifth lens element E5 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 2.2420E-03 4.2171E-02 -2.3071E-01 6.9742E-01 -1.2066E+00 1.1687E+00 -5.9075E-01 1.1622E-01 0.0000E+00
S2 -8.7570E-02 6.7941E-02 3.8055E-01 -2.0867E+00 5.5534E+00 -8.7588E+00 8.1051E+00 -4.0629E+00 8.5017E-01
S3 -1.0475E-01 2.6910E-01 1.1504E+00 -7.8760E+00 2.3881E+01 -4.2983E+01 4.6317E+01 -2.7482E+01 6.8940E+00
S4 2.6408E-02 4.9406E-01 -1.3456E+00 4.6274E+00 -1.0601E+01 1.1700E+01 2.3198E-01 -1.1801E+01 7.3028E+00
S5 -1.3101E-01 7.9463E-02 -1.7310E-02 1.8826E-01 -4.2896E-01 5.6508E-01 -5.1071E-01 2.9044E-01 -7.1690E-02
S6 -1.5669E-01 1.2166E-01 -4.2000E-03 -2.1650E-01 8.8904E-01 -1.6701E+00 1.6457E+00 -8.4412E-01 1.8068E-01
S7 -4.8330E-02 1.2665E-02 5.2128E-01 -1.2270E+00 1.6008E+00 -1.4292E+00 8.4814E-01 -2.9801E-01 4.6348E-02
S8 2.9198E-02 -1.1070E-02 2.9141E-01 -5.4261E-01 4.9982E-01 -2.8028E-01 9.6836E-02 -1.8850E-02 1.5720E-03
S9 -1.7566E-01 1.3782E-01 -6.4970E-02 1.2190E-02 3.2090E-03 -2.1700E-03 4.6400E-04 -4.6000E-05 1.7500E-06
S10 -1.9095E-01 1.4342E-01 -8.5950E-02 3.6785E-02 -1.1330E-02 2.4300E-03 -3.4000E-04 2.8200E-05 -1.0000E-06
TABLE 5
Table 6 shows the total effective focal length f of the optical lens, the effective focal lengths f1 to f5 of the respective lenses, the total optical length TTL of the optical lens, and the maximum half field angle HFOV of the optical lens in example 2.
f1(mm) 2.75 f(mm) 5.57
f2(mm) -3.90 TTL(mm) 5.28
f3(mm) 11.25 HFOV(°) 30.8
f4(mm) -220.30
f5(mm) -4.71
TABLE 6
Fig. 4A shows an on-axis chromatic aberration curve of the optical lens of embodiment 2, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 4B shows astigmatism curves representing meridional field curvature and sagittal field curvature of the optical lens of embodiment 2. Fig. 4C shows a distortion curve of the optical lens of embodiment 2, which represents the distortion magnitude values in the case of different viewing angles. Fig. 4D shows a chromatic aberration of magnification curve of the optical lens of embodiment 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 system of embodiment 2 can achieve good imaging quality.
Example 3
An optical lens according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic structural diagram of an optical lens according to embodiment 3 of the present application.
As shown in fig. 5, an optical lens according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6, and image plane S13.
The first lens E1 has positive focal power, and the object-side surface S1 of the first lens E is a convex surface, and the image-side surface S2 of the first lens E is a concave surface; the second lens E2 has negative focal power, and the object side surface S3 and the image side surface S4 are concave surfaces; the third lens E3 has positive focal power, the object side surface S5 of the third lens is a concave surface, and the image side surface S6 of the third lens is a convex surface; the fourth lens E4 has negative focal power, and the object side surface S7 is a concave surface while the image side surface S8 is a convex surface; the fifth lens element E5 has a negative refractive power, and has a concave object-side surface S9 and a concave image-side surface S10. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging plane S13.
Table 7 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens of example 3, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0001460947150000131
Figure BDA0001460947150000141
TABLE 7
As can be seen from table 7, in embodiment 3, both the object-side surface and the image-side surface of any one of the first lens element E1 to the fifth lens element E5 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 1.5849E-02 -2.6480E-02 2.4680E-01 -1.0125E+00 2.4614E+00 -3.5996E+00 3.0937E+00 -1.4344E+00 2.7321E-01
S2 -7.0800E-03 1.3181E-02 1.9910E-02 -1.0599E-01 1.3769E-01 -8.3710E-02 1.3754E-02 0.0000E+00 0.0000E+00
S3 -3.4670E-02 1.7966E-01 -2.2917E-01 1.2576E-01 1.2335E-01 -2.1972E-01 9.4425E-02 0.0000E+00 0.0000E+00
S4 3.6629E-02 1.3671E-01 -2.9418E-01 8.3882E-01 -1.5444E+00 1.6875E+00 -7.1581E-01 0.0000E+00 0.0000E+00
S5 -1.3809E-01 2.2653E-02 -3.0066E-01 1.9450E+00 -8.4244E+00 2.1888E+01 -3.2871E+01 2.6693E+01 -9.1382E+00
S6 -1.4813E-01 8.3120E-03 3.6207E-01 -1.1100E+00 2.1828E+00 -2.8175E+00 2.2974E+00 -1.0633E+00 2.1134E-01
S7 -4.3910E-01 1.1380E+00 -9.9606E-01 -2.9697E-01 1.7718E+00 -2.2055E+00 1.4841E+00 -5.5272E-01 9.0027E-02
S8 -2.0355E-01 6.0167E-01 -2.9976E-01 -5.2190E-01 9.9964E-01 -8.0080E-01 3.5574E-01 -8.5420E-02 8.6750E-03
S9 -1.4801E-01 1.2011E-01 -7.7530E-02 3.4696E-02 -1.0140E-02 1.9420E-03 -2.4000E-04 1.7400E-05 -5.7000E-07
S10 -1.0507E-01 7.0359E-02 -4.2130E-02 1.7732E-02 -5.2100E-03 1.0390E-03 -1.3000E-04 9.9400E-06 -3.2000E-07
TABLE 8
Table 9 shows the total effective focal length f of the optical lens, the effective focal lengths f1 to f5 of the respective lenses, the total optical length TTL of the optical lens, and the maximum half field angle HFOV of the optical lens in example 3.
f1(mm) 2.59 f(mm) 5.40
f2(mm) -4.30 TTL(mm) 5.30
f3(mm) 16.29 HFOV(°) 31.5
f4(mm) -42.01
f5(mm) -6.08
TABLE 9
Fig. 6A shows an on-axis chromatic aberration curve of the optical lens of embodiment 3, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 6B shows astigmatism curves representing meridional field curvature and sagittal field curvature of the optical lens of embodiment 3. Fig. 6C shows a distortion curve of the optical lens of embodiment 3, which represents the distortion magnitude values in the case of different viewing angles. Fig. 6D shows a chromatic aberration of magnification curve of the optical lens of embodiment 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 system of embodiment 3 can achieve good imaging quality.
Example 4
An optical lens according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic structural diagram of an optical lens according to embodiment 4 of the present application.
As shown in fig. 7, an optical lens according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6, and image plane S13.
The first lens E1 has positive focal power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface; the second lens E2 has negative focal power, and the object side surface S3 and the image side surface S4 are concave surfaces; the third lens E3 has positive focal power, and the object-side surface S5 of the third lens is a concave surface, and the image-side surface S6 of the third lens is a convex surface; the fourth lens E4 has positive focal power, and the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface; the fifth lens element E5 has a negative refractive power, and has a concave object-side surface S9 and a concave image-side surface S10. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging plane S13.
Table 10 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens of example 4, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0001460947150000151
Watch 10
As can be seen from table 10, in example 4, both the object-side surface and the image-side surface of any one of the first lens element E1 to the fifth lens element E5 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 1.6462E-02 -1.4250E-02 1.5947E-01 -6.6048E-01 1.6396E+00 -2.4613E+00 2.1782E+00 -1.0462E+00 2.0733E-01
S2 -4.6800E-03 1.3068E-02 7.7600E-04 -5.6900E-02 8.8613E-02 -6.8750E-02 2.0633E-02 0.0000E+00 0.0000E+00
S3 -4.3770E-02 2.4409E-01 -4.2033E-01 4.9045E-01 -2.8448E-01 3.3808E-02 4.0299E-02 0.0000E+00 0.0000E+00
S4 5.8429E-02 7.9563E-02 -1.1539E-01 1.7540E-01 -7.4560E-02 -1.3110E-02 9.1188E-02 0.0000E+00 0.0000E+00
S5 -1.6733E-01 -3.4600E-02 1.0202E-01 -7.8385E-01 7.9966E-01 3.5380E+00 -1.0779E+01 1.1878E+01 -4.8964E+00
S6 -1.7162E-01 -2.2520E-02 4.4852E-01 -1.1230E+00 1.7288E+00 -1.6661E+00 1.0070E+00 -3.4804E-01 5.1819E-02
S7 -4.7349E-01 1.1763E+00 -7.0749E-01 -9.5579E-01 2.2366E+00 -2.0343E+00 1.0025E+00 -2.5980E-01 2.7223E-02
S8 -1.9458E-01 5.0202E-01 1.4241E-01 -1.2772E+00 1.6973E+00 -1.1795E+00 4.7508E-01 -1.0510E-01 9.9020E-03
S9 -1.5418E-01 1.2891E-01 -8.1250E-02 3.4643E-02 -9.8000E-03 1.8670E-03 -2.3000E-04 1.7500E-05 -5.9000E-07
S10 -1.1004E-01 7.6736E-02 -4.4880E-02 1.8191E-02 -5.1900E-03 1.0190E-03 -1.3000E-04 9.7800E-06 -3.2000E-07
TABLE 11
Table 12 shows the total effective focal length f of the optical lens, the effective focal lengths f1 to f5 of the respective lenses, the total optical length TTL of the optical lens, and the maximum half field angle HFOV of the optical lens in example 4.
f1(mm) 2.60 f(mm) 5.40
f2(mm) -4.39 TTL(mm) 5.30
f3(mm) 22.00 HFOV(°) 31.5
f4(mm) 5486.50
f5(mm) -5.91
TABLE 12
Fig. 8A shows on-axis chromatic aberration curves of the optical lens of embodiment 4, which represent the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 8B shows astigmatism curves representing meridional field curvature and sagittal field curvature of the optical lens of embodiment 4. Fig. 8C shows a distortion curve of the optical lens of embodiment 4, which represents the distortion magnitude values in the case of different viewing angles. Fig. 8D shows a chromatic aberration of magnification curve of the optical lens of embodiment 4, which represents a deviation of different image heights on the image plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical lens system of embodiment 4 can achieve good imaging quality.
Example 5
An optical lens according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic structural diagram of an optical lens according to embodiment 5 of the present application.
As shown in fig. 9, an optical lens according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6, and image plane S13.
The first lens E1 has positive focal power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface; the second lens E2 has negative focal power, and the object side surface S3 is a convex surface, and the image side surface S4 is a concave surface; the third lens E3 has positive focal power, the object side surface S5 of the third lens is a concave surface, and the image side surface S6 of the third lens is a convex surface; the fourth lens E4 has negative focal power, and the object side surface S7 is a concave surface while the image side surface S8 is a convex surface; the fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging plane S13.
Table 13 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens of example 5, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0001460947150000171
Watch 13
As can be seen 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 to the fifth lens element E5 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.
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 1.5617E-02 -1.2660E-02 1.3730E-01 -5.4010E-01 1.2920E+00 -1.8934E+00 1.6524E+00 -7.8929E-01 1.5713E-01
S2 -6.3320E-02 1.5565E-01 -1.6754E-01 1.7179E-02 1.6628E-01 -1.8131E-01 6.2270E-02 0.0000E+00 0.0000E+00
S3 -1.3973E-01 4.3944E-01 -5.8255E-01 3.5165E-01 1.8021E-01 -3.9389E-01 1.7913E-01 0.0000E+00 0.0000E+00
S4 -3.4070E-02 3.5644E-01 -5.9962E-01 8.3521E-01 -9.2214E-01 8.2016E-01 -3.5334E-01 0.0000E+00 0.0000E+00
S5 -1.5094E-01 -1.2395E-01 8.2427E-01 -4.3268E+00 1.1788E+01 -2.0282E+01 2.2188E+01 -1.3629E+01 3.3993E+00
S6 -1.5320E-01 3.6693E-02 2.7794E-02 5.2410E-01 -1.3300E+00 -4.6425E-01 4.1607E+00 -4.4144E+00 1.5169E+00
S7 -5.0692E-01 1.6348E+00 -4.1039E+00 1.1872E+01 -2.5459E+01 3.3648E+01 -2.6236E+01 1.1117E+01 -1.9723E+00
S8 -1.2651E-01 3.5871E-01 -2.2777E-01 1.5415E-01 -2.7818E-01 3.2167E-01 -1.9989E-01 6.5456E-02 -8.9300E-03
S9 -1.5008E-01 1.1600E-01 -7.0210E-02 3.0025E-02 -8.6100E-03 1.6560E-03 -2.1000E-04 1.5300E-05 -5.0000E-07
S10 -1.0914E-01 6.9061E-02 -3.7660E-02 1.4274E-02 -3.7500E-03 6.6700E-04 -7.7000E-05 5.1100E-06 -1.5000E-07
TABLE 14
Table 15 shows the total effective focal length f of the optical lens, the effective focal lengths f1 to f5 of the respective lenses, the total optical length TTL of the optical lens, and the maximum half field angle HFOV of the optical lens in example 5.
f1(mm) 2.63 f(mm) 5.40
f2(mm) -4.22 TTL(mm) 5.30
f3(mm) 11.61 HFOV(°) 31.5
f4(mm) -40.76
f5(mm) -5.98
Watch 15
Fig. 10A shows an on-axis chromatic aberration curve of the optical lens of embodiment 5, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 10B shows astigmatism curves representing meridional field curvature and sagittal field curvature of the optical lens of example 5. Fig. 10C shows a distortion curve of the optical lens of example 5, which represents the distortion magnitude values in the case of different angles of view. Fig. 10D shows a chromatic aberration of magnification curve of the optical lens of example 5, which represents a deviation of different image heights on the image plane after light passes through the lens. As can be seen from fig. 10A to 10D, the optical lens system of embodiment 5 can achieve good imaging quality.
Example 6
An optical lens according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic structural diagram of an optical lens according to embodiment 6 of the present application.
As shown in fig. 11, an optical lens according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6, and image plane S13.
The first lens E1 has positive focal power, and the object side surface S1 and the image side surface S2 are convex surfaces; the second lens E2 has negative focal power, and the object side surface S3 and the image side surface S4 are concave surfaces; the third lens E3 has positive focal power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface; the fourth lens E4 has negative focal power, and the object side surface S7 is a concave surface while the image side surface S8 is a convex surface; the fifth lens element E5 has a negative refractive power, and has a concave object-side surface S9 and a concave image-side surface S10. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging plane S13.
Table 16 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens of example 6, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0001460947150000191
TABLE 16
As can be seen 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 to the fifth lens element E5 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 1.7127E-02 -2.3070E-02 2.1254E-01 -8.3597E-01 2.0188E+00 -3.0115E+00 2.6968E+00 -1.3285E+00 2.7277E-01
S2 -1.7700E-03 2.3910E-02 6.2041E-02 -3.3339E-01 5.6803E-01 -4.7495E-01 1.5723E-01 0.0000E+00 0.0000E+00
S3 -2.5310E-02 2.2939E-01 -3.3546E-01 1.5804E-01 2.8069E-01 -4.5060E-01 2.0999E-01 0.0000E+00 0.0000E+00
S4 2.8061E-02 1.8705E-01 -3.0038E-01 2.6602E-01 5.5219E-02 -2.9931E-01 2.1679E-01 0.0000E+00 0.0000E+00
S5 -2.6870E-01 -4.2100E-03 -2.1093E-01 9.8140E-01 -5.7946E+00 1.7423E+01 -2.8868E+01 2.5941E+01 -9.9180E+00
S6 -2.7051E-01 6.3629E-02 -7.9450E-02 6.0541E-01 -1.3525E+00 7.6654E-01 1.3309E+00 -1.9724E+00 7.5429E-01
S7 -4.3846E-01 1.3132E+00 -3.3561E+00 8.9318E+00 -1.7813E+01 2.2887E+01 -1.7830E+01 7.6471E+00 -1.3793E+00
S8 -2.0120E-02 1.3731E-01 -2.1130E-02 -4.5900E-02 -7.6890E-02 1.7020E-01 -1.2059E-01 3.9286E-02 -5.0100E-03
S9 -1.4597E-01 1.1824E-01 -8.0570E-02 4.1855E-02 -1.5630E-02 3.9940E-03 -6.5000E-04 5.9000E-05 -2.3000E-06
S10 -1.0077E-01 6.4847E-02 -3.9870E-02 1.8238E-02 -6.0500E-03 1.3870E-03 -2.1000E-04 1.7900E-05 -6.8000E-07
TABLE 17
Table 18 shows the total effective focal length f of the optical lens, the effective focal lengths f1 to f5 of the respective lenses, the total optical length TTL of the optical lens, and the maximum half field angle HFOV of the optical lens in example 6.
f1(mm) 2.54 f(mm) 5.40
f2(mm) -3.90 TTL(mm) 5.30
f3(mm) 10.97 HFOV(°) 31.5
f4(mm) -26.82
f5(mm) -6.32
Watch 18
Fig. 12A shows an on-axis chromatic aberration curve of the optical lens of embodiment 6, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 12B shows astigmatism curves representing meridional field curvature and sagittal field curvature of the optical lens of example 6. Fig. 12C shows a distortion curve of the optical lens of example 6, which represents the distortion magnitude values in the case of different angles of view. Fig. 12D shows a chromatic aberration of magnification curve of the optical lens 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 according to embodiment 6 can achieve good imaging quality.
Example 7
An optical lens according to embodiment 7 of the present application is described below with reference to fig. 13 to 14D. Fig. 13 is a schematic structural view showing an optical lens according to embodiment 7 of the present application.
As shown in fig. 13, an optical lens according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6, and image plane S13.
The first lens E1 has positive focal power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface; the second lens E2 has negative focal power, and the object side surface S3 and the image side surface S4 are concave surfaces; the third lens E3 has positive focal power, and the object-side surface S5 of the third lens is a concave surface, and the image-side surface S6 of the third lens is a convex surface; the fourth lens element E4 has negative focal power, and has a concave object-side surface S7 and a convex image-side surface S8; the fifth lens element E5 has a negative refractive power, and has a convex object-side surface S9 and a concave image-side surface S10. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging plane S13.
Table 19 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens of example 7, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0001460947150000211
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 to the fifth lens element E5 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.
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 1.6608E-02 -9.9800E-03 1.3013E-01 -5.3813E-01 1.3485E+00 -2.0592E+00 1.8646E+00 -9.2180E-01 1.8863E-01
S2 -7.0200E-03 1.6145E-02 5.5210E-03 -9.1960E-02 1.5813E-01 -1.3401E-01 4.5133E-02 0.0000E+00 0.0000E+00
S3 -4.0880E-02 2.4395E-01 -4.1007E-01 4.3781E-01 -1.7792E-01 -6.7170E-02 8.1613E-02 0.0000E+00 0.0000E+00
S4 6.3559E-02 6.5422E-02 -3.7500E-03 -3.0882E-01 9.7506E-01 -1.1671E+00 6.0300E-01 0.0000E+00 0.0000E+00
S5 -1.6092E-01 -7.8150E-02 3.1059E-01 -1.7906E+00 4.2212E+00 -4.3068E+00 4.4278E-01 2.9267E+00 -1.8490E+00
S6 -1.5171E-01 -1.9870E-02 2.7308E-01 -4.1659E-01 1.6374E-01 4.1395E-01 -6.7781E-01 4.3462E-01 -1.0807E-01
S7 -4.9541E-01 1.5215E+00 -2.3323E+00 3.3385E+00 -4.9247E+00 5.6082E+00 -4.0761E+00 1.6599E+00 -2.8868E-01
S8 -1.6692E-01 5.3531E-01 -2.0764E-01 -5.2385E-01 8.3868E-01 -5.8574E-01 2.2190E-01 -4.2920E-02 3.0770E-03
S9 -1.4400E-01 1.0627E-01 -6.7530E-02 3.0578E-02 -9.3600E-03 1.9370E-03 -2.6000E-04 2.0400E-05 -7.1000E-07
S10 -8.7720E-02 4.9815E-02 -2.7100E-02 1.0307E-02 -2.7500E-03 5.0400E-04 -6.0000E-05 4.1900E-06 -1.3000E-07
Watch 20
Table 21 shows the total effective focal length f of the optical lens, the effective focal lengths f1 to f5 of the respective lenses, the total optical length TTL of the optical lens, and the maximum half field angle HFOV of the optical lens in example 7.
f1(mm) 2.59 f(mm) 5.40
f2(mm) -4.33 TTL(mm) 5.30
f3(mm) 13.73 HFOV(°) 31.5
f4(mm) -31.17
f5(mm) -6.41
TABLE 21
Fig. 14A shows an on-axis chromatic aberration curve of the optical lens of embodiment 7, which represents the deviation of the convergent focal points 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 of example 7. Fig. 14C shows a distortion curve of the optical lens of embodiment 7, which represents the distortion magnitude values in the case of different angles of view. Fig. 14D shows a chromatic aberration of magnification curve of the optical lens of example 7, which represents a deviation of different image heights on the image plane after light passes through the lens. As can be seen from fig. 14A to 14D, the optical lens system according to embodiment 7 can achieve good imaging quality.
In summary, examples 1 to 7 each satisfy the relationship shown in table 22 below.
Figure BDA0001460947150000221
Figure BDA0001460947150000231
TABLE 22
The present application also provides an imaging device whose electron photosensitive element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone, a tablet computer, or the like. The imaging device is equipped with the optical lens described above.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of 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 (18)

1. The optical lens system includes, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens,
the first lens has positive optical power;
the second lens has a negative focal power;
the third lens has positive optical power;
the fourth lens has positive focal power or negative focal power, and the image side surface of the fourth lens is a convex surface;
the fifth lens has a negative optical power; and
wherein a combined focal length f1234 of the first lens, the second lens, the third lens and the fourth lens and a separation distance T45 of the fourth lens and the fifth lens on the optical axis satisfy f1234/T45 < 4.0;
the effective focal length f3 of the third lens and the effective focal length f5 of the fifth lens meet the condition that the effective focal length f3/f5 is more than-4.0 and less than-1.5;
the curvature radius R7 of the object side surface of the fourth lens and the curvature radius R10 of the image side surface of the fifth lens meet the condition that R7/R10 is more than or equal to-0.7 and more than or equal to-0.2;
the number of lenses having power in the optical lens is five.
2. The optical lens of claim 1, wherein the diameter of the entrance pupil of the optical lens, EPD/ImgH, and half of the diagonal length of the effective pixel area on the imaging surface of the optical lens, imgH satisfy EPD/ImgH ≦ 0.7.
3. An optical lens according to claim 1, characterized in that an effective focal length f1 of the first lens and an effective focal length f2 of the second lens satisfy-1.0 ≦ f1/f2 ≦ -0.5.
4. An optical lens according to claim 1, characterized in that the radius of curvature R8 of the image side surface of the fourth lens and the effective focal length f5 of the fifth lens satisfy 0.2 ≦ R8/f5 ≦ 0.8.
5. An optical lens according to claim 1 or 4, characterized in that-5.5 < f5/T45 < -3.5 is satisfied.
6. An optical lens barrel according to claim 1, wherein a radius of curvature R1 of the object-side surface of the first lens and a radius of curvature R4 of the image-side surface of the second lens satisfy 0 ≦ R1/R4 ≦ 0.6.
7. An optical lens according to claim 1, characterized in that an angle of incidence β 5 of light rays on the image-side surface of the fifth lens at a maximum field of view satisfies 3 ° < β 5 < 16 °.
8. An optical lens barrel according to claim 1, wherein the maximum effective semi-aperture diameter DT8 of the image side surface of the fourth lens element and the maximum effective semi-aperture diameter DT9 of the object side surface of the fifth lens element satisfy 0.4 ≦ DT8/DT9 ≦ 0.8.
9. An optical lens according to any one of claims 6 to 8, wherein an optical total length TTL of the optical lens and a total effective focal length f of the optical lens satisfy TTL/f ≦ 1.0.
10. The optical lens sequentially comprises from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens,
the first lens has positive optical power;
the second lens has a negative optical power;
the third lens has positive optical power;
the fourth lens has positive focal power or negative focal power, and the image side surface of the fourth lens is a convex surface;
the fifth lens has a negative optical power; and
the incidence angle beta 5 of the light rays on the image side surface of the fifth lens on the maximum field of view is more than 3 degrees and less than 16 degrees and more than 5 degrees;
the effective focal length f3 of the third lens and the effective focal length f5 of the fifth lens meet the condition that the effective focal length f3/f5 is more than-4.0 and less than-1.5;
the curvature radius R7 of the object side surface of the fourth lens and the curvature radius R10 of the image side surface of the fifth lens meet the condition that R7/R10 is more than or equal to-0.7 and more than or equal to-0.2;
the number of lenses having power in the optical lens is five.
11. An optical lens barrel according to claim 10, wherein a radius of curvature R1 of the object-side surface of the first lens and a radius of curvature R4 of the image-side surface of the second lens satisfy 0 ≦ R1/R4 ≦ 0.6.
12. An optical lens according to claim 10, characterized in that an effective focal length f1 of the first lens and an effective focal length f2 of the second lens satisfy-1.0 ≦ f1/f2 ≦ -0.5.
13. An optical lens according to claim 10, characterized in that the radius of curvature R8 of the image side surface of the fourth lens and the effective focal length f5 of the fifth lens satisfy 0.2 ≦ R8/f5 ≦ 0.8.
14. An optical lens according to claim 10, wherein an effective focal length f5 of the fifth lens is separated from the fourth lens and the fifth lens on the optical axis by a distance T45 which satisfies-5.5 < f5/T45 < -3.5.
15. An optical lens barrel according to claim 10, wherein the maximum effective semi-aperture diameter DT8 of the image side surface of the fourth lens element and the maximum effective semi-aperture diameter DT9 of the object side surface of the fifth lens element satisfy 0.4 ≦ DT8/DT9 ≦ 0.8.
16. The optical lens assembly as claimed in claim 10, wherein an optical total length TTL of the optical lens assembly and a total effective focal length f of the optical lens assembly satisfy TTL/f ≦ 1.0.
17. An optical lens as claimed in any one of claims 10 to 16, characterized in that the EPD/ImgH satisfies EPD/ImgH ≦ 0.7 for the diameter of the entrance pupil of the optical lens and half of the diagonal length of the effective pixel area on the imaging surface of the optical lens.
18. An optical lens according to any one of claims 12 to 14, characterized in that a combined focal length f1234 of the first lens, the second lens, the third lens and the fourth lens and a separation distance T45 of the fourth lens and the fifth lens on the optical axis satisfy f1234/T45 < 4.0.
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