Hybrid wavefront sensor for the fast detection of wavefront disturbances.
Hybrid wavefront sensor for the fast detection of wavefront disturbances.
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DOI：
10.1364/ao.51.006268
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发表时间：
2012-09
期刊：
影响因子：
1.9
通讯作者：
Shihao Dong;T. Haist;W. Osten
中科院分区：
文献类型：
--
作者：
Shihao Dong;T. Haist;W. Osten
强像差波前导致基于全息的模式波前传感（HMWS）的不准确性和非线性。在这方面的贡献，一个低分辨率的夏克哈特曼传感器（LRSHS）被纳入HMWS通过紧凑的全息设计，以扩大动态范围的HMWS。一个静态的二元相位计算全息图被用来产生所需的模式，夏克哈特曼传感和HMWS。首先用LRSHS检测主导波前误差的低阶像差模式，并由波前调制器校正。然后，系统切换到HMWS以获得更好的传感器灵敏度和准确度。仿真和实验结果验证了所提出的方法。
Strongly aberrated wavefronts lead to inaccuracies and nonlinearities in holography-based modal wavefront sensing (HMWS). In this contribution, a low-resolution Shack-Hartmann sensor (LRSHS) is incorporated into HMWS via a compact holographic design to extend the dynamic range of HMWS. A static binary-phase computer-generated hologram is employed to generate the desired patterns for Shack-Hartmann sensing and HMWS. The low-order aberration modes dominating the wavefront error are first sensed with the LRSHS and corrected by the wavefront modulator. The system then switches to HMWS to obtain better sensor sensitivity and accuracy. Simulated as well as experimental results are shown for validating the proposed method.