２干渉縞位相シフトアルゴリズムによるシングル・ショット位相シフト干渉計

抄録

A Polarization Mach Zehnder Interferometer (PMZI) was implemented to analyze transparent samples using a two-step algorithm to retrieve the optical phase data. The major drawback of the two-step phase shifting algorithms is that can′t be used in the singular case where the phase shift correspond to Π, this case specially presented when using a polarizing beam splitter as a detector when interfering cross circular polarized beams. In order to take the advantage of the PMZI, certain conditions need to meet in the beams to properly obtain the interference patterns and correctly retrieve the optical phase data. We present the experimental setup based in obtain interference of elliptical polarizing beams in opposite directions to properly use the two-step phase shifting algorithm encountered in the literature. The major novelty of this configuration is to avoid the use of linear polarizing filters at the output in each interferogram and also it can be easily extended in more than two interferograms to retrieve the phase more accurately. Experimental results of dynamic events are presented.