DeMars Luke A, Mikuła-Zdańkowska Marta, Falaggis Konstantinos, Porras-Aguilar Rosario
Appl Opt. 2020 May 1;59(13):D125-D130. doi: 10.1364/AO.383610.
A vibration-insensitive, single-shot phase-calibration method for phase-only spatial light modulators (SLM) is reported. The proposed technique uses a geometric phase lens to form a phase-shifting radial shearing interferometer to enable common-path measurements. This configuration has several advantages: (a) unlike diffraction-based SLM calibration techniques, this technique is robust against intensity errors due to misalignment; (b) unlike two-beam interferometers, this technique offers a high environmental stability; and (c) unlike intensity-based methods, the phase-shifting capability provides a phase uncertainty routinely in the order of ${2}\pi /100$2π/100. The experimental results show a significantly higher accuracy when compared to the diffraction-based approaches.
报道了一种用于纯相位空间光调制器（SLM）的抗振动单脉冲相位校准方法。所提出的技术使用几何相位透镜形成相移径向剪切干涉仪，以实现共光路测量。这种配置具有几个优点：（a）与基于衍射的SLM校准技术不同，该技术对因未对准引起的强度误差具有鲁棒性；（b）与双光束干涉仪不同，该技术具有高环境稳定性；（c）与基于强度的方法不同，相移能力通常提供约为${2}\pi /100$的相位不确定性。实验结果表明，与基于衍射的方法相比，该方法具有显著更高的精度。
