Abstract
Phase-shifting point diffraction interferometers are used to measure large-aperture spherical optical elements because of their high level of measurement accuracy. As the most commonly used phase-shifting method, piezoelectric ceramic transducers are faced with nonlinear problems. Wavelength tuning is typically used to solve the phase-shifting problem; however, it is sensitive to environmental vibrations and light intensity changes during tuning. Therefore, a global optimization iterative algorithm based on interferogram normalization is proposed here. The method is insensitive to noise, defects, and light intensity changes and has a strong ability to resist environmental disturbance. Simulations and experiments are performed to verify the effectiveness of the proposed method.
© 2019 Optical Society of America
Full Article | PDF ArticleMore Like This
Qian Liu, Yang Wang, Fang Ji, and Jianguo He
Appl. Opt. 52(31) 7654-7659 (2013)
Zhe Zhang, Donghui Zheng, Lei Chen, Chenhui Hu, and Zhiyao Ma
Opt. Express 31(13) 21239-21252 (2023)
Yangjin Kim, Kenichi Hibino, Naohiko Sugita, and Mamoru Mitsuishi
Appl. Opt. 55(23) 6464-6470 (2016)