Relay scanning imaging optical system of space large caliber compression light beam

Abstract

The space large-aperture compressed beam relay scanning imaging optical system is mainly composed of an afocal telescopic system, a scanning device and a focusing system. The afocal telescopic system is composed of an objective lens system composed of a parabolic primary reflector M1 and a convex hyperboloid secondary reflector M2 and Composed of relay mirror M3, the focus of the object space of M3 coincides with the focus of the image space of the objective lens system; the afocal telescopic system collects the radiation beam of the ground target, compresses the aperture of the incident beam, and then emits it in the form of parallel light. After being scanned by the scanning device, it enters the following focusing imaging system for imaging. The large-diameter (meter-scale) compressed beam scanning imaging system suitable for space application of the present invention avoids the difficult problems of preparation, processing and control of the large-diameter scanning mirror, has strong environmental adaptability, and is suitable for space application.

Description

technical field [0001] The invention belongs to the optical technology field of space optical remote sensors, and relates to a space large-aperture compressed beam multispectral imaging optical imaging system. Background technique [0002] As a means of space remote sensing information acquisition, space infrared imaging technology has very important value in space information acquisition. Common infrared optical systems used in space imaging can be divided into three categories: area array staring imaging, push-broom imaging and short line array scanning imaging. Currently, they are limited by infrared focal plane detector technology and large cooling capacity refrigeration technology. , most of the optical systems used in space infrared imaging at home and abroad are short-line array scanning imaging methods. [0003] The scanning imaging system applied to space infrared imaging mainly adopts the form of object-space scanning. This imaging optical system uses a short infr...

AI Technical Summary

Problems solved by technology

[0005] The forward-looking infrared system (FLIR) applied on the ground achieves small-aperture (centimeter-scale) beam compression and large-field scanning through a transmissive optical system, but it has poor adaptability and high environmental requirements, making it difficult to realize Compression and scanning of large-aperture optical systems, and transmission optical systems are difficult to achieve multi-spectral scanning imaging, which is not suitable for space applications

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