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Centroid computing of far-field spots based on sub-aperture retro array
Author(s): Feilong Wang; Shijie Hu; Bing Xu
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Paper Abstract

Since the jitter frequency of incident laser beam becomes higher in the ‘Common Path/Common Mode’ (CP/CM) system due to the guiding system added to the laser module, the current laser-beam stabilizing control with hartmannshack sensor is not enough. As we all know, better beam stabilizing control effect requires higher detecting frequency. Generally, the detecting frequency of hartmann-shack sensor in the CP/CM system is far lower than the far-field spot. So we want to use the far-field spot of the SARA to feedback instead of the hartmann-shack sensor. In this work, we study the far-field spot of a 61-unit SARA from the CP/CM system. We ratiocinate the process of the simulation based on Fresnel diffraction and Fourier optics. Comparison between standard far-field spot and the far-field spot from sixty one units SARA based on duty ratio of the retro reflectors and different wavefront tilts aberrations is given, while the wavefront is given in zernike model.

Paper Details

Date Published: 24 October 2017
PDF: 6 pages
Proc. SPIE 10462, AOPC 2017: Optical Sensing and Imaging Technology and Applications, 1046231 (24 October 2017); doi: 10.1117/12.2285007
Show Author Affiliations
Feilong Wang, Institute of Optics and Electronics, Chinese Academy of Sciences (China)
Univ. of Chinese Academy of Sciences (China)
Shijie Hu, Institute of Optics and Electronics, Chinese Academy of Sciences (China)
Bing Xu, Institute of Optics and Electronics, Chinese Academy of Sciences (China)


Published in SPIE Proceedings Vol. 10462:
AOPC 2017: Optical Sensing and Imaging Technology and Applications
Yadong Jiang; Haimei Gong; Weibiao Chen; Jin Li, Editor(s)

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