Optical Misalignment Sensing for Optical Aperture Synthesis Telescope by Using Phase Diversity | |
Fang Cao![]() ![]() ![]() | |
2008-07-10 | |
Source Publication | Adaptive Optics Systems |
Volume | 7015 |
Issue | 7015 |
Pages | Vol.7015 4Q-1-7 |
Conference Date | 2008-6-23 |
Conference Place | Marseille, France |
Funding Organization | The International Society for Optical Engineering |
Publisher | SPIE |
Abstract |
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. |
Keyword | Aperture Synthesis Telescope Wave-front Sensors Phase Diversity Method Genetic Algorithms |
Subject Area | 恒星光干涉及综合孔径 |
Document Type | 会议论文 |
Identifier | http://ir.niaot.ac.cn/handle/114a32/561 |
Collection | 会议论文 |
Recommended Citation 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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Optical Misalignment(261KB) | 开放获取 | CC BY-NC-ND | View Download |
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