Main mirror face deformation detecting method and system for space reflection type optical remote sensor

Abstract

The invention discloses a space reflecting type optical remote sensor main mirror surface shape aberrance detecting system. The system includes a main mirror, secondary mirrors, a pointolite device, beam-splitters, sampling mirrors and a photoelectric detecting device; wherein, the system is provided with a plurality of the sampling mirrors and the sampling mirrors are all rigidly connected with the main mirror. The invention simultaneously discloses a space reflecting type optical remote sensor main mirror surface shape aberrance detecting method which detects the centroid positions of each facula formed by that the pointolite passes through the beam-splitter, the secondary mirror, the plurality of sampling mirrors, the secondary mirror and the beam-splitter sequentially and is reflected on the detecting device before and after the main mirror surface generates aberrance to acquire the deviation value of the centroid positions of each facula before and after the aberrance of the main mirror surface; the partial slope change of the main mirror at the location of each sampling mirror is calculated according to the deviation value; thereby acquiring the distribution of the main mirror surface shape aberrance. By utilizing the invention, the main mirror surface shape aberrance can be led to have the advantages of few limitations, little energy consumption, high concealment; and the invention can provide enough signal-to-noise ratio, the structure needs detecting is simple and reliable and the detecting process is simple and convenient.

Description

technical field [0001] The invention relates to a detection technology of the main mirror surface distortion of a reflective optical imaging system, in particular to a detection method and system for the main mirror surface distortion of a spatial reflection optical remote sensor. Background technique [0002] With the development of space science and technology, space optical remote sensors are playing an increasingly important role in the acquisition of ground information. For example, space optical remote sensors can be used for forest fire early warning, weather forecasting, crop monitoring, and especially space reconnaissance. etc. The space optical remote sensor has the advantages of wide monitoring range, high resolution, and strong real-time performance. It is a modern, high-performance, and non-territorial space monitoring tool. It has become a space project that various countries are competing to develop. [0003] In practical applications, due to factors such as ...

AI Technical Summary

Problems solved by technology

However, this method needs to install a mechanical scanning device not smaller than the aperture of the primary mirror outside the primary mirror. The structure is relatively complex, the weight is heavy, and the detection time is prolonged due to the use of sequential scanning, which is not very suitable for space optical remote sensors.

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