Using the maximum and the minimum of interference, a novel two-step phase demodulation algorithm is proposed to perform the phase extraction in phase-shifting interferometry. By means of the simulation calculation and the experimental research, it is proved that both the measured phase and the phase shift with high precision can be obtained in the proposed algorithm.
© 2012 Optical Society of America
Original Manuscript: August 9, 2012
Manuscript Accepted: September 18, 2012
Published: November 8, 2012
Jian Deng, Hankun Wang, Fengjie Zhang, Desi Zhang, Liyun Zhong, and Xiaoxu Lu, "Two-step phase demodulation algorithm based on the extreme value of interference," Opt. Lett. 37, 4669-4671 (2012)