Open AccessOne-shot phase-shifting phase-grating interferometry with modulation of polarization: case of four interferograms
Author(s) -
Gustavo Rodríguez-Zurita,
Cruz Meneses-Fabián,
Noel-Iván Toto-Arellano,
José F. Vázquez-Castillo,
Carlos Robledo-Sánchez
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.007806
Subject(s) - optics , polarizer , interferometry , polarization (electrochemistry) , diffraction , grating , birefringence , physics , diffraction grating , phase (matter) , phase modulation , interference (communication) , linear polarization , materials science , laser , phase noise , channel (broadcasting) , chemistry , electrical engineering , quantum mechanics , engineering
An experimental setup for optical phase extraction from 2-D interferograms using a one-shot phase-shifting technique able to achieve four interferograms with 90 degrees phase shifts in between is presented. The system uses a common-path interferometer consisting of two windows in the input plane and a phase grating in Fourier plane as its pupil. Each window has a birefringent wave plate attached in order to achieve nearly circular polarization of opposite rotations one respect to the other after being illuminated with a 45 degrees linear polarized beam. In the output, interference of the fields associated with replicated windows (diffraction orders) is achieved by a proper choice of the windows spacing with respect to the grating period. The phase shifts to achieve four interferograms simultaneously to perform phase-shifting interferometry can be obtained by placing linear polarizers on each diffraction orders before detection at an appropriate angle. Some experimental results are shown.