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Ultra wide-angle lens

An ultra-wide-angle lens and lens group technology, applied in the field of ultra-wide-angle lenses, can solve the problems of unfavorable production costs and high production costs of aspheric lenses, and achieve the effect of good projection quality

Inactive Publication Date: 2014-04-30
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to reduce imaging distortion, aspheric lenses are generally used to replace spherical lenses in the design process of ultra-wide-angle lenses. However, the production cost of aspheric lenses is relatively high, which is not conducive to saving production costs

Method used

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Examples

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] see figure 1 , which is an ultra-wide-angle lens 100 provided in an embodiment of the present invention for imaging an object located on the object side on the imaging surface of the image side, wherein an image sensing element 200 is arranged on the image side of the ultra-wide-angle lens 100 to capture Take an image of the image plane on the image side. The imaging surface on the image side is the sensing surface of the image sensing element 200 .

[0030] The super wide-angle lens 100 sequentially includes a first lens group 10 with negative refractive power and a second lens group 20 with positive refractive power from the object side to the image side. The first lens group 10 includes a first spherical lens 11, a second spherical lens 12, and a third spherical lens 13 from the object side to the image side, and the first spherical lens 11 to the...

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Abstract

A super-wide-angle lens system for imaging an object on an imaging surface, includes a first lens group with negative refraction power and a second lens group with positive refraction power. The first lens group includes a first spherical lens with negative refraction power, a second spherical lens with negative refraction power, and a third spherical lens with positive refraction power. The first lens has a first surface facing the object side of the first lens group. The second lens group includes a fourth spherical lens with positive refraction power and a fifth spherical lens with negative refraction power. The system satisfies the formulas: 0.01<D / |FG1|<1, and 2<D / FG2<4, where D is the distance from the first surface to the imaging surface, FG1 is the effective focal length of the first lens group, and FG2 is the effective focal length of the second lens group.

Description

technical field [0001] The invention relates to a lens, in particular to a super wide-angle lens. Background technique [0002] The viewing angle of traditional ultra-wide-angle lenses for vehicles is required to be above 90 degrees, and images captured by ultra-wide-angle lenses usually have serious imaging distortion on the screen. Therefore, how to design an ultra-wide-angle lens with a wide viewing angle and without serious distortion of imaging has become a research direction for engineers and technicians in this technical field. In order to reduce imaging distortion, aspheric lenses are generally used to replace spherical lenses in the design process of ultra-wide-angle lenses. However, the production cost of aspheric lenses is relatively high, which is not conducive to saving production costs. Contents of the invention [0003] In view of this, it is necessary to provide an ultra-wide-angle lens with high projection quality and low cost. [0004] A super wide-angl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/06G02B13/00
CPCG02B13/06G02B9/10
Inventor 彭芳英黄海若王圣安柳晓娜
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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