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Wide-angle lens and imaging equipment

A wide-angle lens and lens technology, applied in the field of imaging lenses, can solve the problem of difficult to meet the diversified use requirements of drones, and achieve the effect of compact setting, reducing length, and meeting imaging requirements.

Active Publication Date: 2022-05-24
JIANGXI LIANCHUANG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, conventional optical lenses on the market are difficult to meet the diversified use needs of drones

Method used

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  • Wide-angle lens and imaging equipment
  • Wide-angle lens and imaging equipment
  • Wide-angle lens and imaging equipment

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0074] see figure 1 , which is a schematic structural diagram of the wide-angle lens 100 provided in the first embodiment of the present invention. The wide-angle lens 100 sequentially includes: a first lens L1, a second lens L2, a third lens L3, a light The optical centers of the diaphragm ST, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7 and the filter G1 are located on the same straight line.

[0075] The first lens L1 has negative refractive power, the object side S1 of the first lens is convex, and the image side S2 of the first lens is concave;

[0076] The second lens L2 has negative refractive power, the object side S3 of the second lens is concave, and the image side S4 of the second lens is convex;

[0077] The third lens L3 has positive refractive power, the object side S5 of the third lens is convex, and the image side S6 of the third lens is concave;

[0078] The fourth lens L4 has positive refractive power, the object side S7 of ...

no. 2 example

[0093] see Figure 5 , shows a schematic structural diagram of a wide-angle lens 200 provided in this embodiment. The wide-angle lens 200 in this embodiment and the wide-angle lens 100 in the first embodiment have roughly the same surface concavities and convexities, and the difference is: There are differences in the radius of curvature, thickness, and air spacing between individual lenses. Specifically, the relevant parameters of each lens of the wide-angle lens 200 in this embodiment are shown in Table 3.

[0094] table 3

[0095]

[0096] Table 4 shows the relevant parameters of the aspherical lens of the wide-angle lens 200 in this embodiment.

[0097] Table 4

[0098]

[0099] see Image 6, which shows the F-Theta distortion curve of the wide-angle lens 200 in this embodiment. It can be seen from the figure that the F-Theta distortion of the lens is small and within -8%, indicating that the distortion of the wide-angle lens 200 is well corrected.

[0100] see ...

no. 3 example

[0103] see Figure 9 , shows a schematic structural diagram of a wide-angle lens 300 provided in this embodiment. The wide-angle lens 300 in this embodiment and the wide-angle lens 100 in the first embodiment have roughly the same surface concavities and convexities. The difference is: There are differences in the radius of curvature, thickness, and air spacing between individual lenses. Specifically, the relevant parameters of each lens of the wide-angle lens 300 in this embodiment are shown in Table 5.

[0104] table 5

[0105]

[0106] Table 6 shows the relevant parameters of the aspherical lens of the wide-angle lens 300 in this embodiment.

[0107] Table 6

[0108]

[0109] see Figure 10 , shows the F-Theta distortion curve of the wide-angle lens 300 in this embodiment. It can be seen from the figure that the F-Theta distortion of the lens is small and within -6%, indicating that the distortion of the wide-angle lens 300 is well corrected.

[0110] see Figur...

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Abstract

The invention discloses a wide-angle lens and imaging equipment. The wide-angle lens sequentially includes: a first lens with negative optical power from the object side to the imaging surface along the optical axis, the object side is convex, and the image side is concave; The second lens of degree, its object side is concave, and the image side is convex; the third lens with positive refractive power, its object side is convex, and the image side is concave; The object side is concave, and the image side is convex; the fifth lens with positive refractive power has both the object side and the image side are convex; the sixth lens with negative refractive power, the object side is concave, and the image side is convex; The seventh lens with positive refractive power has a convex surface at the near optical axis on the object side and a concave image at the near optical axis, and both the object side and the image side of the seventh lens have inflection points. The wide-angle lens has the advantages of large wide-angle and large image surface.

Description

technical field [0001] The present invention relates to the technical field of imaging lenses, in particular to a wide-angle lens and an imaging device. Background technique [0002] With the development of the mobile Internet and the popularity of social, video, and live broadcast software, people are more and more fond of photography, and their pursuit of imaging effects has become more diversified, requiring not only high-definition image quality, but also ultra-large UAVs have won the favor of consumers with their unique high-altitude viewing angle and wide-format shooting pictures. At present, the development of drones is rapid, and the corresponding requirements for their supporting optical lenses are also getting higher and higher. [0003] Since UAVs are mostly used in complex environments such as severe vibration, high pressure and extreme temperature, the performance requirements of the optical lenses used are extremely high. It must have good thermal stability to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B13/06
CPCG02B13/0045G02B13/06
Inventor 李伟娜鲍海江高博何晓源赖晗岑镜谋
Owner JIANGXI LIANCHUANG ELECTRONICS CO LTD
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