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Low-F and small-field-of-view total reflection optical system

An optical system and a large field of view technology, applied in the field of total reflection optical system, can solve the problem of image quality degradation of the total reflection system, and achieve the effect of ensuring detection accuracy and detection range

Inactive Publication Date: 2018-05-04
BEIJING INST OF REMOTE SENSING EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a total reflection optical system with a small F number and a large field of view, which solves the problem that the image quality of the conventional total reflection system drops sharply when the F number becomes smaller and the field of view becomes larger.

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  • Low-F and small-field-of-view total reflection optical system

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Embodiment Construction

[0010] A total reflection optical system with a small F number and a large field of view includes: a primary reflector 1 and a secondary reflector 2, and also includes a third reflector 3 and a fourth reflector 4.

[0011] The mirror surfaces of the main reflector 1, the secondary reflector 2, the third reflector 3 and the fourth reflector 4 are all aspherical structures, and the four reflectors are in accordance with the sub-reflector 2, the main reflector 1, the fourth reflector 4 and the third reflector 3 are arranged in order from front to back, wherein the convex surfaces of the secondary reflector 2, the main reflector 1 and the third reflector 3 are all facing the rear end, and the convex surface of the fourth reflector 4 is facing the front end, wherein the main reflector 4 is facing the front end. Reflector 1, third reflector 3 and fourth reflector 4 have through holes in the center of the mirror surface, the size of the through holes is determined according to the act...

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Abstract

Disclosed is a low-F and small-field-of-view total reflection optical system, which comprises a main reflector (1), a secondary reflector (2), a third reflector (3) and a fourth reflector (4). The four reflectors are all of an aspheric structure. The secondary reflector (2), the main reflector (1), the fourth reflector (4) and the third reflector (3) are arranged in order from front to back. The reflector center of each of the main reflector (1), the third reflector (3) and the fourth reflector (4) is provided with a through hole. The four reflectors are coaxially fixed in a mechanic supporting way. The pixel quality is effectively improved when F becomes lower and the field-of-view becomes larger, thereby guaranteeing the detection precision and the detection range of the optical system.

Description

technical field [0001] The invention relates to a total reflection optical system, in particular to a total reflection optical system with a small F number and a large field of view. Background technique [0002] The ratio of the light aperture to the focal length of a conventional total reflection optical system, that is, the F number, is generally above 2, and its field of view is generally in the within. In general, the smaller the F number and the larger the field of view, the more difficult it is to design and process the optical system. Therefore, the total reflection optical system is generally a system with a large F number and a small field of view. Total reflection optical system is divided into coaxial total reflection optical system and off-axis total reflection optical system. Compared with off-axis total reflection optical system, coaxial total reflection optical system has obstruction and smaller field of view, but it is easier to manufacture and assemble. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B17/06
Inventor 周军李娟甄政李昂石学虎欧文
Owner BEIJING INST OF REMOTE SENSING EQUIP
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