A device and method for synchronous measurement of atmospheric turbulence height and angle anequal wave front error

Abstract

The invention provides an atmospheric turbulence height and angle anisoplanatism wavefront error synchronization measurement device and a synchronization measurement method. Two paths of independent high-order wide-field Hartmann wavefront sensors in a high-order wide-field dual-Hartmann wavefront sensor module are used, synchronous triggering is carried out through a signal generator, synchronous acquiring is carried out on imaging sub spot array images of a double-star system and an artificial beacon, and a fast steering mirror is used for carrying out real-time correction on wavefront error tilt terms which can not be detected by the artificial beacon; and finally, through a wavefront reconstruction algorithm, reconstruction wavefront between two natural beacons in the double-star system and the artificial beacon is obtained respectively, and through the reconstruction wavefront difference among the three, the height and angle anisoplanatism wavefront error result at the same moment and correction between the height and angle anisoplanatism wavefront errors are obtained through calculation. The method can be applied to measurement in different atmospheric turbulence conditions, the measurement principle is simple, and an important reference value is provided for the design and the demonstration of the artificial beacon adaptive optics system in an astronomical telescope.

Description

technical field [0001] The invention belongs to the technical field of optical information measurement, and relates to a device and method for synchronously measuring the wave front error of atmospheric turbulent height non-isohalosis and angle non-equal halo, specifically the atmospheric turbulence height based on double large-field Hartmann sensors Device and method for synchronous measurement of non-uniform and angular non-uniform wavefront errors. Background technique [0002] Atmospheric turbulence caused by factors such as solar radiation causes random fluctuations in the refractive index of the atmosphere, which affects the performance of the optical system of ground-based astronomical telescopes. Adaptive optics can make corresponding corrections to the target light wavefront. However, astronomical adaptive optics systems for real-time correction of atmospheric turbulence usually require one or more beacons with a sufficient number for real-time wavefront detection....

AI Technical Summary

Problems solved by technology

However, the theoretical analysis is based on certain atmospheric environmental conditions, and the atmospheric model, calculation method, and boundary conditions used will affect the accuracy of the actual results.

For the experimental measurement of the non-isohalo error of beacon wavefront detection, currently there is only a comprehensive measurement of the non-isohalo error of the height and the non-isohalo of the angle. Error differentiation and reporting of simultaneous measurements

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