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Off-axis three-mirror imaging system with free-form surface

An off-axis three-mirror and imaging system technology, which is applied in the parts, image communication, instruments and other directions of the TV system, can solve the problems such as the inability to obtain high-resolution images at the same time, the inability to achieve a large field of view and a small F number at the same time, etc. , to achieve the effect of high-resolution images

Active Publication Date: 2021-01-05
TSINGHUA UNIV +1
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing free-form surface off-axis three-mirror optical system is mainly aimed at high-resolution imaging with a large field of view or a small F-number, which cannot simultaneously achieve a large field of view and a small F-number, and cannot simultaneously obtain high-resolution images within a large imaging range

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  • Off-axis three-mirror imaging system with free-form surface
  • Off-axis three-mirror imaging system with free-form surface
  • Off-axis three-mirror imaging system with free-form surface

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Embodiment Construction

[0024] The technical solution of the present invention will be further described in detail below according to the drawings in the description and in combination with specific embodiments.

[0025] The invention provides a design method of a free-form surface off-axis imaging system, which includes the following steps:

[0026] Step 1: Establish an initial system and select a characteristic field of view.

[0027] The initial system includes a plurality of initial curved surfaces, and one initial curved surface in the initial system corresponds to one curved surface in the free-form off-axis imaging system to be designed. The plurality of initial curved surfaces may be planes, spherical surfaces and the like. The specific positions of the multiple initial curved surfaces are selected according to the actual needs of the free-form surface off-axis imaging system to be designed. The number of initial curved surfaces in the initial system is designed according to actual needs. ...

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Abstract

The invention relates to an off-axis three-mirror imaging system with a free-form surface, which includes: a primary mirror, a primary mirror, a third mirror, and a detector. The above-mentioned detector receives and forms an image, and the field angle of the free-form surface off-axis three-mirror imaging system is greater than or equal to 60°×1°, and the F number is less than or equal to 2.5.

Description

technical field [0001] The invention relates to the field of optical design, in particular to a free-form surface off-axis three-mirror imaging system. Background technique [0002] Free-form surfaces refer to non-traditional surfaces that cannot be represented by spherical or aspherical coefficients. They are usually non-rotational symmetric, flexible in structure, and have many variables, which provide more degrees of freedom for optical design and can greatly reduce the aberration of the optical system. , reducing the volume, weight and number of lenses of the system can meet the needs of modern imaging systems, and has broad development and application prospects. Since freeform surfaces have asymmetrical faces and provide more design freedom, they are often used in off-axis asymmetrical systems. [0003] The existing free-form surface off-axis three-mirror optical system is mainly aimed at high-resolution imaging with a large field of view or a small F-number, which can...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B17/06
CPCG02B17/0642G02B17/0626H01L27/14629H04N25/615
Inventor 唐瑞锐张本奇朱钧金国藩范守善
Owner TSINGHUA UNIV