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Large-wide-angle video lens with focal length of 8mm

A large wide-angle, lens technology, applied in the field of large wide-angle video lens, can solve the problems of low resolution of peripheral field of view, easy image distortion, etc., to achieve increased light flux and resolution, small coma and astigmatism, and reduced tolerance sensitivity degree of effect

Pending Publication Date: 2020-09-22
北创光电科技(邵阳)有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to provide a large wide-angle video lens with a focal length of 8mm, the first lens group of which has three negative lenses, so that the lens has a larger wide-angle, and can increase the light flux and resolution of the edge of the lens, and design There are two cemented lenses that cooperate with each other, which can correct chromatic aberration and distortion, and solve the problem of low resolution of the peripheral field of view of the existing lens and easy distortion of the image

Method used

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  • Large-wide-angle video lens with focal length of 8mm
  • Large-wide-angle video lens with focal length of 8mm
  • Large-wide-angle video lens with focal length of 8mm

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Embodiment Construction

[0045] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0046] refer to figure 1 , a large wide-angle video lens with a focal length of 8 mm, the lens sequentially includes from the object side to the image side: a first lens group G1, an iris STO and a second lens group G2;

[0047] The first lens group G1 has positive refractive power and its position is fixed;

[0048] The second lens group G2 has positive refractive power and its position can move along the optical axis direction;

[0049] The first lens group G1 includes a first negative lens group G11 and a second negative lens group G12, the first negative lens group G11 includes at least three negative lenses, the second negative lens group G12 includes a positive and negative cemented lens of negative refractive power and Negative and positive cemented lenses with positive power;

[0050] The first lens group G1 and the second lens group G2 satisfy the...

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Abstract

The invention discloses a large wide-angle video lens with a focal length of 8mm, and the lens sequentially comprises a first lens group, a second lens group, a third lens group, a fourth lens group and a fifth lens group from an object side to an image side, the first lens group has positive focal power and is fixed in position, the second lens group has positive focal power and can move along the direction of the optical axis; the first lens group comprises a first negative lens group and a second negative lens group. The first negative lens group comprises at least three negative lenses; the second negative lens group comprises a positive-negative cemented lens with negative focal power and a negative-positive cemented lens with positive focal power, the first lens group is provided with three negative lenses, so that the lens has a large wide angle, the light transmission amount and the resolution of the edge part of the lens can be increased, and the chromatic aberration and the distortion can be corrected due to the arrangement of the two cemented lenses which are matched with each other.

Description

technical field [0001] The invention relates to the field of lens technology, in particular to a large wide-angle video lens with a focal length of 8 mm. Background technique [0002] With the rise of video shooting in recent years and the vigorous development of the video industry, the demand for video lenses is increasing. The most important thing for video shooting is clear pictures, high light transmission, and small distortion to reduce object distortion. However, the existing lenses There are shortcomings such as large distortion, small aperture, and insufficient resolution of the peripheral field of view, which cannot meet the high requirements of video shooting. Contents of the invention [0003] The purpose of the present invention is to provide a large wide-angle video lens with a focal length of 8mm, the first lens group of which has three negative lenses, so that the lens has a larger wide-angle, and can increase the light flux and resolution of the edge of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/06
CPCG02B13/06
Inventor 江健熹郑忠亮黄国山肖顺东
Owner 北创光电科技(邵阳)有限公司
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