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Centroid computing of far-field spots based on sub-aperture retro array
Feilong Wang[1,2,3], Shijie Hu[1,2], Bing Xu[1,2]
2017
会议名称Proceedings of SPIE: AOPC 2017: Optical Sensing and Imaging Technology and Applications
会议录名称0277-786X
卷号10462
页码1046231
摘要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.
关键词61-unit SARA, far-field spot, CP/CM system, duty ratio, wavefront tilt, centroid computing
语种英语
EI分类号2017-2150
文献类型会议论文
条目标识符http://ir.ioe.ac.cn/handle/181551/9018
专题自适应光学技术研究室(八室)
作者单位1.Key laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu ,Sichuan, China 610209
2.Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, Sichuan , China 610209
3.University of Chinese Academy of Sciences, Beijing , China 100049
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Feilong Wang[1,2,3], Shijie Hu[1,2], Bing Xu[1,2]. Centroid computing of far-field spots based on sub-aperture retro array[C],2017:1046231.
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