Multi-optical-path switching system for satellite-borne differential absorption measuring instrument

Abstract

The invention discloses a multi-optical-path switching system for a satellite-borne differential absorption measuring instrument. The multi-optical-path switching system comprises three optical paths, namely an earth measuring main optical path, a sunlight measuring optical path, and a standard lamp measuring optical path. An optical mechanical system in which earth radiation, solar radiation andquartz-tungsten-halogen lamp radiation are received by a two-lens telescope, converged and output is provided. According to the multi-optical-path switching system, rotation mechanisms, namely a reflector, a sunlight blocking disk and a diffuse reflection plate rotation seat are switched by controlling switching optical paths and three optical paths are measured at the same time, so that system volume and weight are reduced, and the connection of subsequent optical measuring systems and the multi-optical-path switching system is facilitated.

Description

[0001] technical field [0002] The invention relates to an optical telemetry and calibration multi-optical path switching device, in particular to a device for receiving earth radiation, solar radiation, and quartz halogen tungsten lamp radiation through an off-axis reflecting telescope, and converging them to a subsequent measurement mechanism. Background technique [0003] The spaceborne differential absorptiometry system is to analyze the distribution and change of trace gas components by detecting the ultraviolet / visible radiation reflected and scattered by the earth's atmosphere or surface. The instrument covers a large field of view of 114 degrees, which meets the requirement of covering the whole world in one day; the instrument needs to use sunlight and standard lamps to achieve spectral and radiation calibration in orbit. Its key technologies include large field of view, wide spectrum, and high-resolution spectral imaging technology. It is required that the front ...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an optical and mechanical system that receives earth radiation, solar radiation, and quartz tungsten halogen lamp radiation through a two-mirror telescope, converges the output and can freely switch between the three, and solves the problem of the current system. The volume is too large, the optical path switching structure is complicated, and the long-distance receiving energy is weak

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