Dong Shihao, Haist Tobias, Osten Wolfgang
Institut für Technische Optik, Stuttgart Research Center of Photonic Engineering, Stuttgart Universität, Stuttgart 70569, Germany.
Appl Opt. 2012 Sep 1;51(25):6268-74. doi: 10.1364/AO.51.006268.
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.
严重畸变的波前会导致基于全息术的模态波前传感（HMWS）出现不准确和非线性问题。在本研究中，通过紧凑的全息设计将低分辨率夏克-哈特曼传感器（LRSHS）纳入HMWS，以扩展HMWS的动态范围。采用静态二元相位计算机生成全息图来生成用于夏克-哈特曼传感和HMWS的所需图案。首先用LRSHS感测主导波前误差的低阶像差模式，并通过波前调制器进行校正。然后系统切换到HMWS以获得更好的传感器灵敏度和精度。给出了仿真和实验结果以验证所提出的方法。
