Co-phasing experiment of a segmented mirror using a combined broadband and two-wavelength algorithm

Li Bin; Yu Wen-Hao; Chen Mo; Tang Jin-Long; Xian Hao

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Co-phasing experiment of a segmented mirror using a combined broadband and two-wavelength algorithm

机译：使用组合宽带和双波长算法进行分段镜的共定位实验

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In this paper, a broadband phasing algorithm is combined with a two-wavelength phasing algorithm to detect the piston error of a segmented mirror with the advantages of long range, high precision, and fast detection. Moreover, an active optics co-phasing experimental system of the segmented mirror is built to verify the algorithm's effectiveness. The segmented mirror consists of four hexagonal segments, with flat-to-flat lengths of 100 mm and radii of curvature of 2000 mm. First, a Shack-Hartmann sensor and piezoelectric actuators are used to finely co-focus the segmented mirror. Then, the broadband phasing algorithm is used to reduce the piston error of the segmented mirror to several micrometers. Finally, the two-wavelength phasing algorithm is used to reduce the piston error of the segmented mirror to zero. The experimental results show that the measurement accuracy is better than 26 nm, and the adjustment accuracy is approximately 55 nm, which demonstrates that the combined algorithm is valuable for segmented-mirror co-phasing measurement and adjustment. (C) 2017 Optical Society of America

机译：在本文中，宽带定相算法与双波长相位算法组合，以检测分段镜的活塞误差，具有长度，精度高，检测快的优点。此外，建立了分段镜的有源光学共相共相的实验系统，以验证算法的效率。分段镜子由四个六边形段组成，平坦平坦长度为100mm，曲率为2000mm。首先，使用Shack-Hartmann传感器和压电致动器来精细共聚焦分段镜。然后，宽带逐步算法用于将分段镜的活塞误差降低到几微米。最后，使用双波长定相算法将分段镜的活塞误差减少到零。实验结果表明，测量精度优于26nm，调节精度约为55nm，这表明组合算法对于分段镜共相测量和调整是有价值的。（c）2017年光学学会

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《Applied optics》 |2017年第32期|共9页
作者
Li Bin; Yu Wen-Hao; Chen Mo; Tang Jin-Long; Xian Hao;
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East China Jiao Tong Univ Sch Mechanotron &

Vehicle Engn Nanchang 330013 Jiangxi Peoples R China;

Chinese Acad Sci Key Lab Adapt Opt Chengdu 610209 Sichuan Peoples R China;

Chinese Acad Sci Key Lab Adapt Opt Chengdu 610209 Sichuan Peoples R China;

Chinese Acad Sci Key Lab Adapt Opt Chengdu 610209 Sichuan Peoples R China;

Chinese Acad Sci Key Lab Adapt Opt Chengdu 610209 Sichuan Peoples R China;

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正文语种 eng
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Co-phasing experiment of a segmented mirror using a combined broadband and two-wavelength algorithm

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