Simultaneous phase–shifting cyclic interferometer for generation of lateral and radial shear
D.I. Serrano–Garcíaª, N.I. Toto–Arellanoª, A. Martínez Garcíaª, J.A. Rayas Álvarezª, A. Téllez–Quiñonesª, and G. Rodríguez–Zuritab
ª Centro de Investigaciones en Óptica, A.C. Loma del Bosque 115 Col. Lomas del Campestre, 37150 Apartado Postal 1–948, León, Gto. México, e–mails: david@cio.mx; ivantotoarellano@cio.mx.
b Facultad de Ciencias Físico–Matemáticas de la Benemérita Universidad Autónoma de Puebla, Apartado Postal 1152, Puebla, 72001, Pue., México.
]]> Recibido el 4 de marzo de 2011
Abstract
We present experimental results obtained by a phase–shifting interferometer employing polarization capable of retrieve directional derivatives in x–direction (lateral shear). The system was adapted to obtain radial derivative (radial shear) and implemented with a cyclic interferometer with phase grid to multiplex the interference patterns. Using phase shifting by polarization, the interferometer is capable of processing the optical phase data with n–interferograms captured in a single shot. Experimental results are presented.
Keywords: Diffraction; phase shifting; lateral shear; radial shear; interferometry; polarization.
Resumen
En este trabajo se presentan los resultados experimentales obtenidos con un sistema interferométrico de corrimiento de fase por polarización, que puede obtener la derivada direccional en dirección x (desplazamiento lateral) y adaptando al arreglo para obtener la derivada radial (desplazamiento radial). El interferómetro que se presenta consiste de un interferómetro cíclico con rejilla de fase para multiplexar los patrones de interferencia. Usando las técnicas de corrimiento de fase por polarización, el interferómetro es capaz de procesar la fase óptica a partir de n–interferogramas capturados en una sola toma. Se presentan los resultados experimentales obtenidos.
Descriptores: Difracción; corrimiento de fase; desplazamiento lateral; desplazamiento radial; interferometría; polarización.
]]>PACS: 42.87.Bg; 42.79.Ci; 42.79.Dj; 42.15.Eq; 42.25.Hz; 07.05.Pj
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Acknowledgements
One of the authors (NITA) occupies a second year to postdoctoral research position at CIO and expresses sincere appreciation to Luisa, Miguel, and Damian for the support provided, and to CONACYT for grant 102137/43055. Partial support from El Consejo Nacional de Ciencia y Tecnologia (CONACYT) and Centro de Investigaciones en (Optica A.C. (CIO) through projects 290597 (CONACYT–CIO) and 124145 (CONACYT–BUAP) is also acknowledged. The author DISG (Grant:227470/31458) is very grateful to CONACyT for the graduate scholarship granted and expresses sincere appreciation to Geliztle. ATQ is grateful to CONACYT for financial support through scholarship 227470/31458.
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