Analysis of spatial resolution and pinhole size for single-shot point-diffraction interferometer using in closed-loop adaptive optics

Analysis of spatial resolution and pinhole size for single-shot point-diffraction interferometer using in closed-loop adaptive optics
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闭环自适应光学单发点衍射干涉仪空间分辨率和针孔尺寸分析

DOI:
10.1016/j.optcom.2013.01.070
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发表时间:
2013-06
影响因子:
2.4
通讯作者:
Tian, Feng
Tian, Feng
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Bai, Fuzhong;Wang, Xiaoqiang;Huang, Kaizheng;Gu, Niting;Gan, Shiming;Tian, Feng

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提出了一种采用单次点衍射干涉仪(PDI)和液晶空间光调制器的闭环自适应光学系统。该方法只需一台CCD摄像机即可实现四幅相位步进干涉图的同时采集,然后用简单的算法直接重建像差波前。为了合理选择或利用单摄像机的光敏面积,分析了单摄像机空间分辨率与重构精度的关系。此外,为了最大限度地提高光强的透射率,从而提高干涉图样的可见度,特别是在闭环校正的初始阶段,研究了闭环自适应光学系统中允许的最大针孔尺寸。进行了数值仿真和闭环校正实验。
A closed-loop adaptive optics system using a single-shot point-diffraction interferometer (PDI) and a liquid crystal spatial light modulator is presented. Only one CCD camera is required to achieve simultaneous acquisition of four phase-stepped interference patterns, and then the aberrated wavefront is directly reconstructed with a simple algorithm. To reasonably choose or utilize the photosensitive area of a single camera using in this class of single-shot interferometers, the relationship of the spatial resolution and the reconstructed accuracy is analyzed. Additionally, to increase the intensity transmission to the utmost extent and thus improve the visibility of interference patterns especially in the beginning of closed-loop correction, the maximal pinhole size allowed in a closed-loop adaptive optics is studied. Numerical simulation and closed-loop correction experiments are performed.
DOI: 10.1364/ol.31.000733
发表时间: 2006-03
期刊: Optics letters
影响因子: 3.6
作者:
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