Phase reconstruction from three interferograms based on integral of phase gradient

Autor: Ming Lei, Peng Gao, Liju Chen, Baoli Yao, Yingli Wang, Junhe Han
Rok vydání: 2008
Předmět:
Zdroj: Journal of Modern Optics. 55:2233-2242
ISSN: 1362-3044
0950-0340
DOI: 10.1080/09500340802082392
Popis: A novel algorithm of phase reconstruction based on the integral of phase gradient is presented. The algorithm directly derives two real-valued partial derivatives from three phase-shifted interferograms. Through integrating the phase derivatives, the desired phase is reconstructed. During the phase reconstruction process, there is no need for an extra rewrapping manipulation to ensure values of the phase derivatives lie in the interval [−π, π] as before, thus this algorithm can prevent error or distortion brought about by the phase unwrapping operation. Additionally, this algorithm is fast and easy to implement, and insensitive to the nonuniformity of the intensity distribution of the interferogram. The feasibility of the algorithm is demonstrated by both computer simulation and experiment.
Databáze: OpenAIRE