CN214375536U - Wide-angle large-eye optical lens - Google Patents
Wide-angle large-eye optical lens Download PDFInfo
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- CN214375536U CN214375536U CN202120145564.XU CN202120145564U CN214375536U CN 214375536 U CN214375536 U CN 214375536U CN 202120145564 U CN202120145564 U CN 202120145564U CN 214375536 U CN214375536 U CN 214375536U
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Abstract
The utility model discloses a big eye optical lens of wide angle, camera lens object space include first lens L1, diaphragm STOP, second lens L2, third lens L3 to the image space in proper order, its characterized in that: the first lens L1 is a meniscus lens with positive focal power and convex towards the object, and at least one surface of the meniscus lens is an aspheric surface; the second lens L2 is a meniscus lens with negative focal power and convex to the image, and at least one surface of the meniscus lens is aspheric; the third lens element L3 is a negative lens element with a 3-shaped structure having a positive refractive power, a convex surface facing the object side and a concave surface facing the image side, and at least one surface thereof is aspheric; the object side surface is convex at the paraxial region, and the change from convex at the paraxial region to concave at the peripheral region is present; the image-side surface of the lens is concave at the paraxial region, and changes from concave to convex at the paraxial region to the peripheral region. The utility model discloses not only the appearance is pleasing to the eye, first piece lens diameter is great, can also satisfy the requirement of shooing of big visual field simultaneously.
Description
Technical Field
The utility model relates to an optical lens technical field, more specifically the big eyes of wide angle optical lens that says so relates to.
Background
In some applications (e.g., medical, industrial, environmental, scientific, surveying, searching, transportation, home appliances, and other applications), a lens is required to capture a scene of a large scene, and the outer appearance of the lens is sometimes required to be relatively large.
Therefore, how to provide a wide-angle and large-eye optical lens with a large 3P field angle and a large appearance lens, which can satisfy the above requirements, is a problem that needs to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a wide-angle large-eye optical lens having an attractive appearance and a large diameter of the first lens, and capable of satisfying the requirement of large-field shooting.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a wide-angle macroscope optical lens, camera lens object space include first lens L1, diaphragm STOP, second lens L2, third lens L3 in proper order to the image space, its characterized in that:
the first lens L1 is a meniscus lens with positive focal power and convex towards the object, and at least one surface of the meniscus lens is an aspheric surface; the second lens L2 is a meniscus lens with negative focal power and convex to the image, and at least one surface of the meniscus lens is aspheric; the third lens element L3 is a negative lens element with a 3-shaped structure having a positive refractive power, a convex surface facing the object side and a concave surface facing the image side, and at least one surface thereof is aspheric; the object side surface is convex at the paraxial region, and the change from convex at the paraxial region to concave at the peripheral region is present; the image-side surface of the lens is concave at the paraxial region, and changes from concave to convex at the paraxial region to the peripheral region.
Preferably, in the wide-angle large-eye optical lens described above, the first lens L1 has a focal length f 1; the second lens L2 and the third lens L3 are combined into a rear group with a focal length f23, and f1/f23 satisfy the following conditions: 0.15< | f1/f23| < 0.8.
Preferably, in the wide-angle large-eye optical lens of the above type, the first lens element L1 has an optical effective diameter D1; the focal length of the lens is F; D1/F satisfies the following condition | D1/F | >0.4
Can know via foretell technical scheme, compare with prior art, the utility model discloses a requirement that big visual field was shot can be satisfied to the camera lens to the diameter that first piece of lens can be done is great, and the outward appearance is beautiful.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of a specific structure according to a first embodiment of the present invention.
Fig. 3 is a light fan diagram according to a first embodiment of the present invention.
Fig. 4 is a graph showing curvature of field and distortion according to a first embodiment of the present invention.
Fig. 5 is a graph illustrating MTF solution according to the first embodiment of the present invention.
Fig. 6 is a schematic diagram of a specific structure of a second embodiment of the present invention.
Fig. 7 is a light fan diagram according to a second embodiment of the present invention.
Fig. 8 is a graph showing curvature of field and distortion according to a second embodiment of the present invention.
Fig. 9 is a graph showing MTF resolution according to a second embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example one (see fig. 2-5):
a wide-angle large-eye optical lens comprises a first lens L1, a diaphragm STOP, a second lens L2, a third lens L3, an optical filter IR, a protective sheet CG and an Image plane Image from an object side to an Image side; wherein the first lens L1 has a first surface S1 convex toward the object side and a second surface S2 concave toward the image side; the plane of STOP is S3; the second lens L2 has a first surface S4 concave to the object side and a second surface S5 convex to the image side; the third lens L3 has a first surface S6 with a convex surface facing the object side and a second surface S7 with a concave surface facing the image side; the filter IR has a first surface S8 facing the object side and a second surface S9 facing the image side; the protective sheet CG has a first surface S10 facing the object side and a second surface S11 facing the Image side, and the Image side Image has a surface S12.
Lens data of the above lens are shown in table 1 below.
[ Table 1]
The conic coefficients k and the aspherical coefficients a2, a4, A6, A8, a10, a12, a14, a16, a18, a20 of the first surface S1 and the second surface S2 of the first lens L1, the first surface S4 and the second surface S5 of the second lens L2, and the first surface S6 and the second surface S7 of the third lens L3 are as shown in table 2 below.
| Surface number | S1 | S2 | S4 | S5 | S6 | S7 |
| Surface name | L1R1 | L1R2 | L2R1 | L2R2 | L3R1 | L3R2 |
| k | -2.18E+01 | 2.85E+01 | 3.56E+00 | 6.43E+00 | -6.37E+00 | -7.92E-01 |
| A2 | 0 | 3.55 |
0 | 0 | 0 | 0 |
| A4 | 2.82E+00 | -2.47E-01 | -2.22E+00 | -4.46E+00 | -5.17E-01 | -1.68E+00 |
| A6 | -2.47E+01 | 3.23E-01 | 2.20E+01 | 3.63E+01 | -2.11E+00 | 2.19E+00 |
| A8 | 2.20E+02 | -3.00E+00 | -1.75E+02 | -2.43E+02 | 1.09E+01 | -2.00E+00 |
| A10 | -1.63E+03 | -1.16E+01 | -2.94E+02 | 8.24E+02 | -2.48E+01 | 3.49E-01 |
| A12 | 8.95E+03 | 6.50E+01 | 2.55E+04 | 1.14E+03 | 3.37E+01 | 1.56E+00 |
| A14 | -3.39E+04 | -2.20E+02 | -2.99E+05 | -2.30E+04 | -2.87E+01 | -2.10E+00 |
| A16 | 8.10E+04 | -6.33E+02 | 1.72E+06 | 9.15E+04 | 1.48E+01 | 1.29E+00 |
| A18 | -1.08E+05 | 1.29E+04 | -4.99E+06 | -1.62E+05 | -4.28E+00 | -4.06E-01 |
| A20 | 6.08E+04 | -3.70E+04 | 5.79E+06 | 1.09E+05 | 5.25E-01 | 5.20E-02 |
[ Table 2]
The conditions satisfied by the above-described lens are shown in table 3.
| f1＝ | 2.376 | D1＝ | 1.142 |
| f23＝ | 10.716 | F＝ | 2 |
| f1/f23＝ | 0.222 | D1/F＝ | 0.571 |
[ Table 3]
In the above embodiment:
as shown in fig. 3 (light sector), it can be seen that the spherical aberration of the lower order has been corrected well and the spherical aberration of the higher order is smaller.
As shown in fig. 4 (field curvature and distortion diagram), the distortion curve is relatively smooth, and the definition of the expanded image is effectively improved.
As shown in fig. 5 (MTF resolution graph), it can be seen from the curves that MTF curves of the meridian and the sagittal of each field of view are relatively close, which indicates that the lens has relatively good imaging consistency in both directions of the meridian (T) and the sagittal (S), and the lens has relatively good imaging effect and resolution.
Example two (see figures 6-9):
a wide-angle large-eye optical lens comprises a first lens L1, a diaphragm STOP, a second lens L2, a third lens L3, an optical filter IR, a protective sheet CG and an Image plane Image from an object side to an Image side; wherein the first lens L1 has a first surface S1 convex toward the object side and a second surface S2 concave toward the image side; the plane of STOP is S3; the second lens L2 has a first surface S4 concave to the object side and a second surface S5 convex to the image side; the third lens L3 has a first surface S6 with a convex surface facing the object side and a second surface S7 with a concave surface facing the image side; the filter IR has a first surface S8 facing the object side and a second surface S9 facing the image side; protective sheet CG has a first surface S10 facing the object side and a second surface S11 facing the Image side, and Image side Image has a surface S12:
lens data of the above lenses are shown in table 4 below.
[ Table 4]
The conic coefficients k and the aspherical coefficients a2, a4, A6, A8, a10, a12, a14, a16, a18, a20 of the first surface S1 and the second surface S2 of the first lens L1, the first surface S4 and the second surface S5 of the second lens L2, and the first surface S6 and the second surface S7 of the third lens L3 are as shown in table 5 below.
| Surface number | S1 | S2 | S4 | S5 | S6 | S7 |
| Surface name | L1R1 | L1R2 | L2R1 | L2R2 | L3R1 | L3R2 |
| K | -2.21E+01 | 2.99E+01 | 3.47E+00 | 6.13E+00 | -6.37E+00 | -7.86E-01 |
| A2 | 0 | 2.08 |
0 | 0 | 0 | 0 |
| A4 | 2.82E+00 | -2.32E-01 | -2.19E+00 | -4.43E+00 | -5.35E-01 | -1.68E+00 |
| A6 | -2.47E+01 | 2.91E-01 | 2.20E+01 | 3.60E+01 | -2.06E+00 | 2.17E+00 |
| A8 | 2.20E+02 | -2.93E+00 | -1.79E+02 | -2.42E+02 | 1.09E+01 | -1.97E+00 |
| A10 | -1.63E+03 | -1.25E+01 | -2.68E+02 | 8.24E+02 | -2.48E+01 | 3.34E-01 |
| A12 | 8.95E+03 | 6.94E+01 | 2.56E+04 | 1.13E+03 | 3.37E+01 | 1.56E+00 |
| A14 | -3.39E+04 | -2.29E+02 | -2.99E+05 | -2.30E+04 | -2.87E+01 | -2.10E+00 |
| A16 | 8.11E+04 | -6.44E+02 | 1.72E+06 | 9.15E+04 | 1.49E+01 | 1.29E+00 |
| A18 | -1.08E+05 | 1.26E+04 | -4.99E+06 | -1.61E+05 | -4.28E+00 | -4.06E-01 |
| A20 | 6.07E+04 | -3.66E+04 | 5.80E+06 | 1.09E+05 | 5.25E-01 | 5.21E-02 |
[ Table 5]
The conditions satisfied by the above-described lens are shown in table 6.
| f1＝ | 2.387 | D1＝ | 1.148 |
| f23＝ | 10.653 | F＝ | 2.016 |
| f1/f23＝ | 0.224 | D1/F＝ | 0.569 |
[ Table 6]
In the above embodiment:
as shown in fig. 7 (light sector), it can be seen that the spherical aberration of the lower order has been corrected well and the spherical aberration of the higher order is smaller.
As shown in fig. 8 (field curvature and distortion diagram), the distortion curve is relatively smooth, and the definition of the expanded image is effectively improved.
As shown in fig. 9 (MTF resolution graph), it can be seen from the curves that MTF curves of the meridian and the sagittal of each field of view are relatively close, which indicates that the lens has relatively good imaging consistency in both directions of the meridian (T) and the sagittal (S), and the lens has relatively good imaging effect and resolution.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. The utility model provides a wide angle macroscope optical lens, camera lens object space include first lens (L1), diaphragm (STOP), second lens (L2), third lens (L3) to the image space in proper order, its characterized in that:
the first lens (L1) is a meniscus lens with positive focal power and convex towards the object, and at least one surface of the meniscus lens is an aspheric surface; the second lens (L2) is a meniscus lens with negative focal power and convex to the image side, and at least one surface of the meniscus lens is an aspheric surface; the third lens (L3) is a negative lens with a 3-shaped structure and a positive focal power, wherein the convex surface faces the object side, and the concave surface faces the image side, and at least one surface of the negative lens is an aspheric surface; the object side surface is convex at the paraxial region, and the change from convex at the paraxial region to concave at the peripheral region is present; the image-side surface of the lens is concave at the paraxial region, and changes from concave to convex at the paraxial region to the peripheral region.
2. A wide-angle large-eye optical lens as claimed in claim 1, wherein the first lens (L1) has a focal length of f 1; the second lens (L2) and the third lens (L3) are combined into a rear group, the focal length is f23, and f1/f23 meets the following conditions: 0.15< | f1/f23| < 0.8.
3. A wide-angle large-eye optical lens as claimed in claim 1, characterized in that the first lens (L1) has an optical effective diameter D1; the focal length of the lens is F; D1/F satisfies the following condition | D1/F | > 0.4.
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| CN202120145564.XU CN214375536U (en) | 2021-01-20 | 2021-01-20 | Wide-angle large-eye optical lens |
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| CN202120145564.XU CN214375536U (en) | 2021-01-20 | 2021-01-20 | Wide-angle large-eye optical lens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116381908A (en) * | 2022-12-29 | 2023-07-04 | 湖北华鑫光电有限公司 | Miniaturized 3p wide-angle lens |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116381908A (en) * | 2022-12-29 | 2023-07-04 | 湖北华鑫光电有限公司 | Miniaturized 3p wide-angle lens |
| CN116381908B (en) * | 2022-12-29 | 2024-05-07 | 湖北华鑫光电有限公司 | Miniaturized 3p wide-angle lens |
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