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Experimental Investigation on Correction of Thermal and Gravitational Distortion of Mirrorswith Adaptive Optics

Zhang Zhiwei (Beijing Institute of Space Science & Technology Information,Beijing 100086) Yu Xin (Beijing Institute of Technology,Beijing 100081) Yang Bingxin (Beijing Institute of Space Mechanics and Electronics,Beijing 100076)$$$$   

  • Published:1999-10-25

Abstract: The paper presents the necessity of employing adaptive optics on high resolution space mirror.The experimental setup of the correction of mirror thermal and gravitational distortion using adaptive optics is introduced.The experiment result is compared with that of the finite element analysis.A reflective plane mirror is used as a model of the primary mirror of the space camera to simulate its thermal and gravitational distortion.A close loop experiment with the 61 unit adaptive optics system is done,the corrective effect of the aberration of the Zernike polynomial is analyzed,and the biggest distortion (P V) value and RMS value of the wavefront after close loop correction is λ/4 and λ/30 seperately.This experiment greatly support the application of adaptive optics on space camera.