中国科学院上海光学精密机械研究所、中国科学院大学、上海瑞立柯信息技术有限公司利用HDSLM80R开展基于背景光绝对参考系的液晶空间光调制器广义相位校准方法实验研究，该论文发表于Optics and Lasers in Engineering Volume 132, September 2020, 106132

Spatial light modulators (SLMs) are widely used in many optical fields such as wavefront modulation, beam shaping and diffractive optical elements. It is necessary to calibrate SLM to determine the initial state of device before using it. Here a simple and generalized interferometry is proposed to calibrate the phase modulation curve with good robustness, stability and high precision, in which the obnoxious background light is no longer an undesired signal, but is utilized as an absolute reference system that provides the self-reference functionality. Combined with centroid localization algorithm, the phase modulation curve can be easily calculated by the fringes shift. Besides, multi-channel detector simultaneously provides three groups of data that further improve the calibration accuracy of gamma curve by weighted average algorithm. An experiment on phase-shifting holography was carried out and verified the validity of our proposed method. The larger the CCD target surface, the better the calibration accuracy is.

发表地址：

https://doi.org/10.1016/j.optlaseng.2020.106132