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Ultra-wide-angle large-aperture aspheric lens

An aspherical, ultra-wide-angle technology, applied in the lens field, can solve problems such as insufficient resolution, affecting shooting quality, and long close-up distance, achieving high resolution, improving MTF, and realistic image quality

Pending Publication Date: 2022-06-03
ZHUHAI CHUANFU OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the applicant found that the existing short-focus video lenses on the market have shortcomings such as insufficient resolution, large distortion, small aperture and long close-up distance, which seriously affect the shooting quality and cannot meet the high-quality requirements at all. Short focus video shooting requirements

Method used

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Embodiment Construction

[0027] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0028] The ultra-wide-angle large-aperture aspheric lens of the present invention comprises a first lens group, a variable diaphragm and a second lens group which are arranged in sequence along the light incident direction. in,

[0029] the first lens group has a positive power position that does not move;

[0030] the second lens group has a moving positive power position;

[0031] Moreover, the first lens group and the second lens group satisfy the following formula:

[0032] 1.5

[0033] In the formula, f1 is the focal length value of the first lens group, and f2 is the foca...

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Abstract

The invention relates to an ultra-wide-angle large-aperture aspherical lens, which comprises a first lens group, an iris diaphragm and a second lens group which are sequentially arranged along a light incidence direction, wherein the first lens group has a fixed positive focal power position; the second lens group has a movable positive focal power position; and the focal length value f1 of the first lens group and the focal length value f2 of the second lens group satisfy 1.5 < f1 / f2 < 2. Therefore, the lens has the advantages of large aperture, small total length, small distortion, high resolution and close-range focusing.

Description

technical field [0001] The invention belongs to the technical field of lenses, and particularly relates to an ultra-wide-angle large-aperture aspherical lens. Background technique [0002] With the development of society, people's demand for video shooting is increasing, and the requirements for video lenses are also getting higher and higher; Large amount of light, good chromatic aberration performance and small distortion. However, the applicant found that: the current short-focus video lenses on the market have shortcomings such as insufficient resolution, large distortion, small aperture and long shooting distance, which seriously affect the shooting quality and cannot meet the high-quality requirements at all. Short-focus video shooting requirements. SUMMARY OF THE INVENTION [0003] In order to solve the above problems existing in the prior art, the present invention provides an ultra-wide-angle large-aperture aspherical lens with a large aperture, small total leng...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/06G02B13/18G02B13/24G02B15/14G02B15/22
CPCG02B13/06G02B13/0045G02B13/006G02B13/009G02B13/24G02B15/1421G02B15/22
Inventor 袁国奎
Owner ZHUHAI CHUANFU OPTICAL TECH
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