Co-phasing of the segmented mirror based on the generalized phase diversity wavefront sensor | |
Changwei Li; Sijiong Zhang | |
2012-09-13 | |
会议录名称 | Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II |
卷号 | 8450 |
期号 | 8450 |
页码 | Vol.8450 0B-1-6 |
会议日期 | 2012-7-1 |
会议地点 | Amsterdam, Netherlands |
会议主办者 | The International Society for Optical Engineering |
出版者 | SPIE |
摘要 |
The stochastic parallel gradient descent algorithm based on the generalized phase diversity wavefront sensor is presented for co-phasing of segmented mirrors. Cost functions of the optimization algorithm were built up in different circular zones for intensity images of the sensor. In order to achieve high accuracy for co-phasing, four phase diversity functions with increasing amplitudes were applied to the sensor for improving the strength of output signal from the wavefront sensor during the aberrations of the segmented mirror decreasing with the co-phasing process. A simulated segmented mirror was used to test the feasibility of this method. The numerical experiments show that the co-phasing accuracy is very high for the aberrations of the segmented mirrors less than 1.5 wavelengths. And the algorithm is very robust and noise tolerant. |
关键词 | Co-phasing Segmented Mirror Wavefront Sensing Optimization Algorithm |
学科领域 | 自适应光学 |
文献类型 | 会议论文 |
条目标识符 | http://ir.niaot.ac.cn/handle/114a32/648 |
专题 | 会议论文 |
推荐引用方式 GB/T 7714 | Changwei Li,Sijiong Zhang. Co-phasing of the segmented mirror based on the generalized phase diversity wavefront sensor[C]:SPIE,2012:Vol.8450 0B-1-6. |
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