wide-angle imaging lens

An imaging lens, wide-angle technology, applied in optical components, instruments, optics, etc., can solve the problem of unable to maintain stable imaging ability, unable to achieve pixels, etc., and achieve the effect of correcting field curvature, eliminating aberration, and correcting chromatic aberration

Active Publication Date: 2021-09-28
合肥联创光学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing lenses cannot maintain stable imaging capabilities in harsh environments and cannot achieve ideal pixels

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0105] see figure 1 The wide-angle imaging lens 100 provided by the first embodiment of the present invention includes, from the object side to the imaging surface in sequence: a first lens L1, a second lens L2, a third lens L3, a stop ST, a fourth lens L4, a Fifth lens L5, sixth lens L6, seventh lens L7, and filter G1.

[0106] The first lens L1 has negative refractive power, the object side S1 is convex, and the image side S2 is concave. The first lens L1 is a glass spherical lens.

[0107] The second lens L2 has negative refractive power, and its object side surfaces S3 and S4 are both concave, and the second lens L2 is a glass aspherical lens.

[0108] The third lens L3 has positive refractive power, the object side S5 is convex, and the image side S6 is concave. The third lens L3 is a glass aspheric lens.

[0109] The fourth lens L4 has positive refractive power, the object side S7 and the image side S8 are both convex, and the fourth lens L4 is a glass spherical lens. ...

no. 2 example

[0123] see Figure 6 , shows a structural diagram of a wide-angle imaging lens 200 provided in this embodiment. The wide-angle imaging lens 200 in this embodiment is roughly the same as the wide-angle imaging lens 100 in the first embodiment, the difference is that the object side surface S3 of the second lens L2 of the wide-angle imaging lens 200 in this embodiment is a convex surface, and the second The image side S6 of the three lenses L3 is convex, the fourth lens L4 is an aspheric lens and the image side S8 is concave, and the radius of curvature and material selection of each lens are different. The specific parameters of each lens are shown in Table 2-1.

[0124] table 2-1

[0125] Surface serial number surface type radius of curvature thickness Refractive index Abbe number Object surface endless endless S1 sphere 10.176458 1.208244 1.835 42.73 S2 sphere 2.698737 2.001130 S3 Aspherical 7.286530 0.631545 ...

no. 3 example

[0132] see Figure 11 , shows a structural diagram of a wide-angle imaging lens 300 provided in this embodiment. The wide-angle imaging lens 300 in this embodiment is roughly the same as the wide-angle imaging lens 100 in the first embodiment, the difference is that the object side surface S3 of the second lens L2 of the wide-angle imaging lens 300 in this embodiment is a convex surface, and the second The object side S5 of the three-lens L3 is concave, and the image side S6 is convex, and the radius of curvature and material selection of each lens are different. The relevant parameters of each lens are shown in Table 3-1.

[0133] Table 3-1

[0134]

[0135]

[0136] The aspheric parameters of the aspheric lens of this embodiment are shown in Table 3-2.

[0137] Table 3-2

[0138]

[0139] In this embodiment, its field curvature, f-θ distortion, axial chromatic aberration and vertical axis chromatic aberration are respectively as follows Figure 12 , Figure 13 ...

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Abstract

A wide-angle imaging lens, comprising in sequence from the object side to the imaging surface: a first lens with negative refractive power, the object side of the first lens is a convex surface, and the image side is concave; a second lens with negative refractive power, the second lens The image side of the second lens is concave; the third lens with positive power; the diaphragm; the fourth lens with positive power, the object side of the fourth lens is convex; the fifth lens with positive power, the fifth lens Both the object side and the image side are convex; the sixth lens has a negative refractive power, the object side and the image side of the sixth lens are concave, and the fifth lens and the sixth lens form a bonded body; it has a positive refractive power The seventh lens, the object side and image side of the seventh lens are convex; The reasonable collocation and the reasonable combination of optical focal power can achieve clear resolution in the entire field of view of the large wide-angle.

Description

technical field [0001] The invention relates to a lens imaging system, in particular to a wide-angle imaging lens. Background technique [0002] At present, with the popularization of portable electronic devices (such as smartphones and cameras), coupled with the popularity of social networking, video, and live broadcast software, people are more and more fond of photography, and camera lenses have become standard equipment for electronic devices. . [0003] For extreme sports, video surveillance, and vehicle lens applications, a lens with high pixels, large field of view, stable performance, and strong imaging capabilities is required to meet harsh environments such as high and low temperature, long-term exposure to the sun, and severe vibrations. Under any circumstances, it can have stable imaging capabilities, and it is required to have clear resolution in the entire field of view within a large wide-angle. Existing lenses cannot maintain stable imaging capabilities in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/06G02B13/18G02B1/00
CPCG02B1/00G02B13/0045G02B13/06
Inventor 刘绪明魏文哲曾吉勇
Owner 合肥联创光学有限公司
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