Spatial large view field, superwide spectral band and multispectral imaging optical system

Abstract

The invention discloses a spatial large view field, superwide spectral band and multispectral imaging optical system, which comprises a switching reflector, a main optical off-axis three-reflector system, a medium- and short-wave focus-free relaying optical system and a long-wave focus-free relaying optical system, wherein a radiation light beam of an imaging target enters from the switching reflector, and is divided into light rays in three channels, namely a visible multispectral channel, a short-wave / medium-wave channel and a long-wave infrared channel, by color division sheets after passing through the main optical off-axis three-reflector system; the light ray in the visible multispectral channel is reflected by the first color division sheet, and then full-color multispectral imaging is realized through a five-color device; the light rays in the short-wave / medium-wave channel and the long-wave infrared channel are transmitted / reflected by the second color division sheet, respectively pass through the own focus-free relaying optical systems, and then are focused on a focal surface for imaging after being subdivided by filters. The spatial large view field, superwide spectral band and multispectral imaging optical system has the advantages of large view field, large relative aperture, wide spectral range, high subdivision degree, compact structure, small volume, light weight and the like; and large-range, all-day and high-resolution dynamic and stable detection can be realized.

Description

technical field [0001] The invention belongs to the technical field of space optical remote sensors, and relates to a method for realizing a visible light / infrared optical imaging system applied in space under the conditions of large field of view, ultra-wide spectrum and multi-spectrum imaging. Background technique [0002] With the development of remote sensing technology, all kinds of users have higher and higher requirements for the spectral information of ground scenes, especially for spectral information covering visible, short-wave, medium-wave and long-wave infrared regions. The higher the spectral resolution of the sensor, the more objectively and effectively the obtained image can reflect the spectral characteristics of the ground object, and the stronger the ability of the sensor to detect the ground object. The difference between different ground objects reflected by different spectral features is reflected in the image can be well reflected. Multispectral imagi...

AI Technical Summary

Problems solved by technology

[0006] The multi-spectral satellite optical systems currently under development and put into use generally have the problems of small field of view, insufficient coverage width of visible light / infrared spectrum, low degree of spectral subdivision within the spectrum band, and insufficient coverage of short-wave spectrum bands.

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