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Laboratorio

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Economicphase-shifting interferometerbycoarse lateral laserpointdisplacements

Carlos Robledo-Sanchez, Rigoberto Juarez-Salazar, Cruz Meneses-Fabian, and Viridiana Ixba-SantosBenemrita Universidad Autnoma de Puebla - Facultad de Ciencias Fsico-Matemticas

rjuarezsalazar@gmail.com

bstractsimple and inexpensive optical setup to phase-

ifting interferometry is proposed. The phase shiftinduced by coarse lateral displacements of the point

er source. Experimental results are consistent withe theoretical expectations and show the feasibility ofs unused phase-shifting technique.

troductionase-Shifting Interferometry (PSI) has become a ver-

tile powerful tool used widely in a variety of precisetical measurement applications [1]. An important

striction of the phase-shifting interferometers is thate conventional shifters are very expensive.

this poster an economic phase-shifting interferome-r [2] is presented. The phase shift is induced by theeral displacement of the laser source. This is car-d out by mounting the point laser source on a mi-

ometric linear translation stage. The interferogram

ocessing is efficiently performed with a generalizedase-shifting algorithm by parameter estimation [3].

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