Wide spectrum and multi-channel imaging optical system based on middle image off-axis three-mirror technique

Abstract

The invention discloses a wide spectrum and multi-channel imaging optical system based on the middle image off-axis three-mirror technique. The wide spectrum and multi-channel imaging optical system based on the middle image off-axis three-mirror technique comprises a visible channel and an infrared channel, wherein a light beam within the view field of the visible channel enters an optical system and then is reflected by an off-axis three-mirror primary mirror and an off-axis three-mirror secondary mirror to reach a third mirror in the visible channel, and after the exit pupil of the visible channel is filled with the reflected light beam, an image is formed at the position of the focus plane of the visible channel; a light beam within the view field of the infrared channel enters a third mirror in the infrared channel after being reflected by the off-axis three-mirror primary mirror and the off-axis three-mirror secondary mirror, the light beam reaches an intermediate-wave-and-long-wave color separation filter, a light beam in the intermediate wave view field is reflected through the front surface of the color separation filter, and an image is formed on the focus plane of an intermediate wave after the reflected light beam penetrates through an intermediate wave combined optical filter; a light beam in the long wave view field perpetrates through the intermediate-wave-and-long-wave color separation filter and then penetrates through a long wave combined optical filter, and then an image is formed on the focus plane of a long wave. The wide spectrum and multi-channel imaging optical system based on the middle image off-axis three-mirror technique has the advantages of being simple in structural mode, compact in structure, small in size, low in weight, large in number of spectrums, wide in spectrum section range, and capable of achieving wide-range, all-weather and high resolution dynamic monitoring.

Description

technical field [0001] The invention belongs to the technical field of space optical remote sensors, and relates to a realization method of a visible light / infrared camera optical imaging system applied in space under the conditions of total reflection, 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 refle...

AI Technical Summary

Problems solved by technology

The use of multiple cameras to obtain wide-spectrum information will make the space camera bulky and heavy, increase the launch cost of the satellite, and reduce the reliability of the entire satellite.

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