Abstract
It is known that the phase response of spatial light modulators (SLMs) measured by double-beam interferometers is sensitive to mechanical and environmental disturbances. This paper proposes a Shack–Hartmann wavefront sensor (SHWS) method to measure the phase response characteristics of the SLM. The results show that the phase modulation depth measured by the proposed method is ${1.7581}\lambda$, and ${1.7993}\lambda$ by the Twyman–Green interferometer method. The difference in the phase modulation depth between the two methods is only ${0.0412}\lambda$, and its relative error rate is 2.29%. It proves that the phase modulation accuracy obtained by the SHWS with lenslets of 73*73 used in this paper is equivalent to that of the Twyman–Green interferometer. Compared with the interferometer method, the SHWS method is simple, compact, and robust, has good real-time performance, and is relatively vibration insensitive. In the future, the SHWS method will play a more important role in the detection of the SLM’s phase response.
© 2022 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Liping Zhao, Nan Bai, Xiang Li, Lin Seng Ong, Zhong Ping Fang, and Anand Krishna Asundi
Appl. Opt. 45(1) 90-94 (2006)
Nitin Dubey, Ravi Kumar, and Joseph Rosen
Opt. Express 29(20) 31859-31874 (2021)
Xing Zhou, Shuhai Jia, Zihan Lin, Huajian Zhang, Longning Wang, Hongqiang Yu, and Yunlong Zhang
J. Opt. Soc. Am. A 40(2) 211-215 (2023)