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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