A Method for Error Decoupling of Scanning Hartmann Detection Devices

Abstract

The embodiment of the invention discloses a method for decoupling errors of a scanning Hartmann detection device. The steps of the method include: constructing a wavefront reconstruction mathematical model based on the slope Zernike polynomial; adding the light pipe array tilt term on the basis of the slope Zernike polynomial in the fitting mode; decoupling the motion error, and outputting the reconstructed wavefront aberration . The embodiment of the present invention adopts the splicing of the light pipe array to detect the large-aperture optical system, and by introducing the error decoupling based on the slope Zeny polynomial fitting, the mechanical movement error of the light pipe array in the scanning detection process is eliminated, thereby greatly improving the detection efficiency. precision.

Description

technical field [0001] The present invention relates to the technical field of optical system wavefront aberration detection, and detects the wavefront aberration of a large-aperture space system based on the Hartmann (Hartmann) principle, and specifically relates to an error decoupling device for a Hartmann detection device method. Background technique [0002] The space optical system is the core of long-distance observation and earth remote sensing equipment, and its quality is the decisive factor for the imaging capability and observation level of the equipment. With the continuous development of space optics technology, the aperture and focal length of the space optics system continue to increase, and the difficulty of detecting the imaging quality of the whole machine also increases accordingly. [0003] The traditional detection method of external field wavefront aberration in space optical system is to simulate an infinite target (the target is usually a star point,...

AI Technical Summary

Problems solved by technology

The method of scanning the Hartmann detection device needs to be equipped with a motion device to realize the scanning motion, and the motion device has mechanical motion errors, especially the pointing error of the light pipe during the scanning process, which seriously affects the detection accuracy

[0005] Therefore, in view of the problems existing in the method of scanning the Hartmann detection device, it is necessary to provide a solution to avoid the low detection accuracy due to the mechanical motion error of the motion device

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