摘要
使用时间及环境变化会引起空间光调制器(SLM)初始相位的改变及波长响应的偏移。针对这一问题,研究了纯相位SLM的初始相位的校准及多波长响应。针对初始相位的校准问题,采用四步移相干涉法测量了SLM的初始相位,进行反复校准,得到了很好的修正效果。针对多波长响应问题,实验研究了干涉条纹级数的变化与不同波长对应的灰度级间的关系,获得了SLM对多波长响应的修正系数。研究结果为在各种不同环境中精确使用SLM提供了技术参考。
The initial phase and wavelength response of the spatial light modulator（SLM） will be shifted with the working time and the environment variation.To solve this problem,we study the initial phase calibration and the multi-wavelength response of phase-only SLM.Four-step phase shifting interferometry is used to measure and calibrate the initial phase of SLM.Michelson interferometer is used to study the relation between the order of interference fringes and the gray scale of different wavelengths experimentally.It is shown that the initial phase is calibrated appropriately and the correction coefficient of wavelength response is achieved successfully.This investigation will provide technologic reference for using SLM in various environments.
出处
《激光与光电子学进展》
CSCD
北大核心
2012年第4期81-84,共4页
Laser & Optoelectronics Progress
基金
国家科学自然基金(61077007)
国家863计划(2009AA01Z309)
教育部长江学者和创新团队发展计划项目(IRT0606)资助课题
关键词
测量
全息术
空间光调制器
相位校准
多波长响应
四步移相
measurement
holography
spatial light modulator
phase calibration
multi-wavelength response
four-step phase shift
