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Wide Angle Lens Group

A wide-angle lens and lens technology, which is applied in the field of wide-angle lens groups, can solve the problems of large aberration, large distortion, and long total length of the lens group, etc.

Active Publication Date: 2019-10-25
NEWMAX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually the picture angle (field of view FOV) of the lens is designed to be 50 degrees to 60 degrees. If the angle exceeds the above design angle, not only the aberration is large, but the design of the lens is also more complicated.
It is known that US 8335043 and US 8576497 use 2 lens groups, 5 to 6 lenses to achieve the purpose of large angle, but the distortion is too large, and such as US 8593737, US 8576497, US8395853, although it can achieve the purpose of large angle, but The total length (TL) of its lens group is too long

Method used

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  • Wide Angle Lens Group
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  • Wide Angle Lens Group

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0073] Please refer to Figure 1A and Figure 1B ,in Figure 1A A schematic diagram showing a wide-angle lens group according to the first embodiment of the present invention, Figure 1B From left to right are the field curvature and distortion aberration curves of the wide-angle lens set of the first embodiment. Depend on Figure 1A It can be seen that the wide-angle lens group includes an aperture 100 and an optical group, and the optical group includes a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, and a fifth lens in sequence from the object side to the image side. 150 . Infrared filtering filter assembly 170 , and imaging surface 180 , wherein there are five lenses with refractive power in the wide-angle lens group. The aperture 100 is disposed between the image-side surface 112 of the first lens 110 and the image-side surface 122 of the second lens 120 .

[0074] The first lens 110 has negative refractive power and is made of plastic material...

no. 2 example

[0109] Please refer to Figure 2A and Figure 2B ,in Figure 2A A schematic diagram showing a wide-angle lens group according to the second embodiment of the present invention, Figure 2B From left to right are the field curvature and distortion aberration curves of the wide-angle lens set of the second embodiment. Depend on Figure 2A It can be seen that the wide-angle lens group includes a diaphragm 200 and an optical group, and the optical group includes a first lens 210, a second lens 220, a third lens 230, a fourth lens 240, and a fifth lens in sequence from the object side to the image side. 250. Infrared ray filtering component 270, and imaging surface 280, wherein the number of lenses with refractive power in the wide-angle lens group is five. The aperture 200 is disposed between the image-side surface 212 of the first lens 210 and the image-side surface 222 of the second lens 220 .

[0110] The first lens 210 has negative refractive power and is made of plastic m...

no. 3 example

[0124] Please refer to Figure 3A and Figure 3B ,in Figure 3A A schematic diagram showing a wide-angle lens group according to a third embodiment of the present invention, Figure 3B From left to right are the field curvature and distortion aberration curves of the wide-angle lens set of the third embodiment. Depend on Figure 3A It can be seen that the wide-angle lens group includes a diaphragm 300 and an optical group, and the optical group includes a first lens 310, a second lens 320, a third lens 330, a fourth lens 340, and a fifth lens in sequence from the object side to the image side. 350 , an infrared filter assembly 370 , and an imaging surface 380 , wherein there are five lenses with refractive power in the wide-angle lens group. The aperture 300 is disposed between the image-side surface 312 of the first lens 310 and the image-side surface 322 of the second lens 320 .

[0125] The first lens 310 has a negative refractive power and is made of plastic material....

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PUM

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Abstract

The invention relates to a wide-angle lens group comprising an aperture, a first lens having a negative refractive power, a second lens having positive refractive power, a third lens having a negativerefractive power, a fourth lens having a positive refractive power, and a fifth lens having a negative refractive power from an object side to an image side. Therefore, the invention provides a five-piece type wide-angle lens group having advantages of great improvement of a picture angle, great parsing capability, short lens length, and low distortion.

Description

technical field [0001] The invention relates to a wide-angle lens group, in particular to a miniaturized five-piece wide-angle lens group applied to electronic products. Background technique [0002] With the rise of electronic products with photographic functions, the demand for optical systems is increasing day by day. In shooting, in order to obtain a wider shooting range, the viewing angle of the lens needs to meet certain requirements, so the requirements for the shooting angle and image quality of the lens are becoming more and more stringent. Usually the picture angle (field of view FOV) of the lens is designed to be 50 degrees to 60 degrees. If the angle exceeds the above design angle, not only the aberration will be large, but the design of the lens will also be more complicated. It is known that US 8335043 and US 8576497 use 2 lens groups, 5 to 6 lenses to achieve the purpose of large angle, but the distortion is too large, and such as US 8593737, US 8576497, US83...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18G02B13/04
CPCG02B13/0045G02B13/04G02B13/06G02B13/18
Inventor 蔡斐欣赖淑姿李钧胜
Owner NEWMAX TECH