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Wide-angle lens and imaging device

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: 2022-01-28
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 device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0074] see figure 1 , which is a schematic structural view of the wide-angle lens 100 provided in the first embodiment of the present invention, the wide-angle lens 100 includes in sequence from the object side to the imaging surface along the optical axis: 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 a convex surface, and the image side S2 of the first lens is a concave surface;

[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 a convex surface, and the image side S6 of the third lens ...

no. 2 example

[0093] see Figure 5 , shows a schematic structural view of a wide-angle lens 200 provided in this embodiment. The wide-angle lens 200 in this embodiment is roughly the same as the wide-angle lens 100 in the first embodiment. There are variations in the radius of curvature, thickness, and air space between individual lenses. Specifically, 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 relevant parameters of the aspheric lens of the wide-angle lens 200 in this embodiment.

[0097] Table 4

[0098]

[0099] see Figure 6, 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 has been well corrected.

[0100] see Figure 7 , shows the field curvature curve diagram of the wide-angle lens 2...

no. 3 example

[0103] see Figure 9 , shows a schematic structural view of a wide-angle lens 300 provided in this embodiment. The wide-angle lens 300 in this embodiment is roughly the same as the wide-angle lens 100 in the first embodiment. There are variations in the radius of curvature, thickness, and air space between individual lenses. Specifically, relevant parameters of each lens of the wide-angle lens 300 in this embodiment are shown in Table 5.

[0104] table 5

[0105]

[0106] The relevant parameters of the aspheric lens of the wide-angle lens 300 in this embodiment are shown in Table 6.

[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 has been well corrected.

[0110] see Figure 11 , shows the field curvature curve diagram of the wid...

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Abstract

The invention discloses a wide-angle lens and an imaging device, and the wide-angle lens sequentially comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens and a seventh lens from an object side to an imaging surface along an optical axis. The first lens has negative focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has negative focal power, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the third lens has positive focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the wide-angle lens further comprises the diaphragm; the fourth lens has positive focal power, the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the fifth lens has positive focal power, and the object side surface and the image side surface of the fifth lens are convex surfaces; the sixth lens has negative focal power, the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface; and the seventh lens has positive focal power, the object side surface of the seventh lens near the optical axis is a convex surface, the image side surface of the seventh lens near the optical axis is a concave surface, and the object side surface and the image side surface of the seventh lens have inflection points. The wide-angle lens has the advantages of large wide angle and large image plane.

Description

technical field [0001] The invention relates to the technical field of imaging lenses, in particular to a wide-angle lens and imaging equipment. Background technique [0002] With the development of the mobile Internet and the popularity of social, video, and live broadcasting software, people are more and more fond of photography, and their pursuit of imaging effects is also more diversified. It requires both high-definition image quality and super large The field of view can capture a wide range of images with strong visual impact. The drone has won the favor of consumers for its unique high-altitude perspective and wide-format shooting images. At present, drones are developing rapidly, and correspondingly, the requirements for their matching optical lenses are getting higher and higher. [0003] Since UAVs are often used in complex environments such as severe vibration, high pressure and extreme temperature, the performance requirements for the optical lens are extremely...

Claims

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Application Information

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Patent Type & Authority Applications(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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