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Six-piece type wide-angle lens group

A wide-angle lens, six-piece technology, applied in optical components, instruments, optics, etc., can solve problems such as large distortion, long overall length of the lens group, and complex lens design.

Active Publication Date: 2022-02-18
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.
Prior art US 8335043 and US 8576497 use 2 lens groups, 5 to 6 lenses to achieve the purpose of large angle, but the distortion (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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  • Six-piece type wide-angle lens group
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  • Six-piece type wide-angle lens group

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0082] like Figure 1A and Figure 1B shown, where Figure 1A A schematic diagram showing a six-piece 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 six-element wide-angle lens set of the first embodiment. Depend on Figure 1A It can be seen that the six-piece 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 first lens in sequence from the object side to the image side. Five lenses 150, a sixth lens 160, an infrared filter assembly 170, and an imaging surface 180, wherein there are six lenses with refractive power in the six-piece wide-angle lens group. The aperture 100 is disposed between the first lens 110 and the second lens 120 .

[0083] The first lens 110 has negative refractive power and is made of plastic materi...

no. 2 example

[0113] like Figure 2A and Figure 2B shown, where Figure 2A A schematic diagram showing a six-piece 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 six-element wide-angle lens set of the second embodiment. Depend on Figure 2A It can be seen that the six-piece wide-angle lens group includes an aperture 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 first lens in sequence from the object side to the image side. The five lenses 250, the sixth lens 260, the infrared filter assembly 270, and the imaging surface 280, wherein there are six lenses with refractive power in the six-piece wide-angle lens group. The aperture 200 is disposed between the first lens 210 and the second lens 220 .

[0114] The first lens 210 has a negative refractive power and is made of...

no. 3 example

[0129] like Figure 3A and Figure 3B shown, where Figure 3A A schematic diagram showing a six-piece wide-angle lens group according to the third embodiment of the present invention, Figure 3B From left to right are the field curvature and distortion aberration curves of the six-element wide-angle lens set of the third embodiment. Depend on Figure 3A It can be seen that the six-piece wide-angle lens group includes an aperture 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 first lens in sequence from the object side to the image side. Five lenses 350, a sixth lens 360, and an imaging surface 380, wherein there are six lenses with refractive power in the six-piece wide-angle lens group. The aperture 300 is disposed between the first lens 310 and the second lens 320 .

[0130] The first lens 310 has negative refractive power and is made of plastic material. Its object-side surface 31...

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Abstract

The invention relates to a six-piece type wide-angle lens group. The six-piece type wide-angle lens group sequentially comprises a first lens with negative refractive power, an aperture, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power and a sixth lens with negative refractive power from an object side to an image side, wherein the thickness of the first lens on the optical axis is CT1, the thickness of the third lens on the optical axis is CT3, the thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, the thickness of the sixth lens on the optical axis is CT6, and the following conditions are met: the (CT4+CT5) / (CT1+CT3+CT6) ratio is more than 0.82 and less than 1.96; and the (CT1+CT6) / CT3 ratio is more than 2.07 and less than 5.52. Therefore, the invention provides the six-piece type wide-angle lens group which has the advantages of wide view angle, high resolution capability, short lens length and small distortion on the premise of considering the productivity of the lens.

Description

technical field [0001] The invention relates to a six-piece wide-angle lens group, in particular to a miniaturized six-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. Prior art US 8335043 and US 8576497 use 2 lens groups, 5 to 6 lenses to achieve the purpose of large angle, but the distortion (distortion) is too large, and such as US 8593737, U...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/06G02B13/18
CPCG02B13/0015G02B13/0045G02B13/06
Inventor 李钧胜
Owner NEWMAX TECH
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