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Wide-angle imaging lens assembly

A lens group and imaging technology, applied in optical components, optics, instruments, etc., can solve the problems of large aberration, long total length of lens group, large distortion, etc.

Active Publication Date: 2017-07-25
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 and 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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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0058] Please refer to Figure 1A and Figure 1B ,in Figure 1A A schematic diagram showing a wide-angle imaging lens group according to the first embodiment of the present invention, Figure 1B From left to right are the spherical aberration, astigmatism and distortion curves of the wide-angle imaging lens set of the first embodiment. Depend on Figure 1A It can be seen that the wide-angle imaging 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, and an infrared filter assembly 170 from the object side to the image side in sequence. , and the imaging surface 180, wherein there are three lenses with refractive power in the wide-angle imaging lens group. The aperture 100 is disposed between the image-side surface 112 of the first lens 110 and the subject.

[0059] The first lens 110 has a positive refractive power and is made of plastic material. Its object-side surface 111 is convex...

no. 2 example

[0086] Please refer to Figure 2A and Figure 2B ,in Figure 2A A schematic diagram showing a wide-angle imaging lens group according to a second embodiment of the present invention, Figure 2B From left to right are the spherical aberration, astigmatism and distortion curves of the wide-angle imaging lens set of the second embodiment. Depend on Figure 2A It can be seen that the wide-angle imaging lens system 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, and an infrared filter assembly 270 from the object side to the image side in sequence. , and the imaging surface 280, wherein there are three lenses with refractive power in the wide-angle imaging lens group. The aperture 200 is disposed between the image-side surface 212 of the first lens 210 and the subject.

[0087] The first lens 210 has positive refractive power and is made of plastic material. Its object-side surface 211 is conv...

no. 3 example

[0099] Please refer to Figure 3A and Figure 3B ,in Figure 3A A schematic diagram showing a wide-angle imaging lens group according to a third embodiment of the present invention, Figure 3BFrom left to right are the spherical aberration, astigmatism and distortion curves of the wide-angle imaging lens set of the third embodiment. Depend on Figure 3A It can be seen that the wide-angle imaging lens system 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, and an infrared filter assembly 370 from the object side to the image side in sequence. , and an imaging surface 380, wherein there are three lenses with refractive power in the wide-angle imaging lens group. The aperture 300 is disposed between the image-side surface 312 of the first lens 310 and the subject.

[0100] The first lens 310 has a positive refractive power and is made of plastic material. Its object-side surface 311 is convex...

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PUM

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Abstract

The invention provides a wide-angle imaging lens assembly which successively includes from an object side to a mirror side: a diaphragm, a first lens which has positive refraction power; a second lens which has negative refraction power; a third lens which has positive refraction power, wherein the first lens and the second lens have a synthesized focus of f12, the third lens has a focus of f3 and the following conditions are met: 0.3<f12 / f3<0.9. The lens assembly herein is a three-lens wide-angle imaging lens assembly that has improved image angle, higher analyzing capability, short lens length, and small distortion.

Description

technical field [0001] The invention relates to a wide-angle imaging lens set, in particular to a miniaturized three-piece wide-angle imaging lens set 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 and 5 to 6 lenses to achieve the purpose of large angle, but the distortion (distortion) is too large, and such as...

Claims

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Application Information

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IPC IPC(8): G02B13/06G02B13/18G02B13/00
CPCG02B13/0035G02B13/06G02B13/18
Inventor 李钧胜
Owner NEWMAX TECH
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