Triple reflection type optical system with large view field, ultra low distortion and multiple spectrums

Abstract

The invention discloses a triple reflection type optical system with a large view field, ultra low distortion and multiple spectrums and relates to the technical field of space optics. The system comprises a main reflecting mirror, a secondary reflecting mirror, an aperture diaphragm, a third aspherical reflecting mirror and a detector phase surface, wherein the optical axis of the main reflecting mirror, the optical axis of the second reflecting mirror, the optical axis of the third aspherical reflecting mirror and the optical axis of the detector are in parallel; the main reflecting mirror, the secondary reflecting mirror and the third aspherical reflecting mirror form a triangle; the main reflecting mirror and the third aspherical reflecting mirror are symmetrically arranged along the optical axis of the secondary reflecting mirror; the detector phase surface is arranged in right front of the third aspherical reflecting mirror; and the position of the aperture diaphragm coincides with the position of the secondary reflecting mirror. The system has the advantages of small volume and light weight, and the three reflecting mirrors are all made of a special base material; the space among all the reflecting mirrors are reasonable in design and can suppress stray light; and the system also has the advantages of low imaging distortion and small graph deformation and meets the requirement on low distortion of a system adopting a TDI (Time Delay Integration) imaging array detector.

Description

technical field [0001] The invention relates to the technical field of space optics, in particular to a large field of view, ultra-low distortion, multi-spectral three-reflection optical system. Background technique [0002] The large field of view, ultra-low distortion, and multispectral imaging space camera optical system using multispectral photodetectors as imaging receivers can obtain high High-resolution photos can be widely used in the fields of national defense and military industry, so they are favored by national defense and military departments. [0003] At present, some cameras with three-reflection optical system have unreasonable structures and poor layout, or when the field of view angle is large, the structure is also large, or the system imaging distortion is too large, and the image formed by the system is seriously deformed, which affects the space. The scope of use of the camera. Also the camera is too heavy. Therefore, it is imperative to develop a ne...

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Problems solved by technology

[0004] In view of the above situation, in order to solve the defects of the prior art, the purpose of the present invention is to provide a large field of view, ultra-low dist

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