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Optical Misalignment Sensing for Optical Aperture Synthesis Telescope by Using Phase Diversity
Fang Cao; Yongtian Zhu; Zhen Wu
2008-07-10
会议录名称Adaptive Optics Systems
卷号7015
期号7015
页码Vol.7015 4Q-1-7
会议日期2008-6-23
会议地点Marseille, France
会议主办者The International Society for Optical Engineering
出版者SPIE
摘要
An optical aperture synthesis telescope such as the LBT will suffer from phase errors unless the apertures are aligned to within a small fraction of a wavelength. A phase diversity wave-front sensor can measure phase errors brought by a misaligned aperture synthesis telescope. The Phase Diversity is formulated in the context of nonlinear programming where a metric is developed and then minimized. We here introduce a novel Genetic Algorithms (GAs), evaluate the different Zernike coefficients to obtain the wave-front error. The results of the computer simulations performed with simulated data including the effects of noise are shown for the case of random misalignment phase errors on each of three sub-telescope.
关键词Aperture Synthesis Telescope Wave-front Sensors Phase Diversity Method Genetic Algorithms
学科领域恒星光干涉及综合孔径
文献类型会议论文
条目标识符http://ir.niaot.ac.cn/handle/114a32/561
专题会议论文
推荐引用方式
GB/T 7714
Fang Cao,Yongtian Zhu,Zhen Wu. Optical Misalignment Sensing for Optical Aperture Synthesis Telescope by Using Phase Diversity[C]:SPIE,2008:Vol.7015 4Q-1-7.
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