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Proceedings Paper

Transparent object analysis in a Mach-Zehnder interferometer using the multiplicative analogical moire phase-shifting method
Author(s): Benito Vasquez Dorrio; Jose Carlos Lopez Vazquez; Angel F. Doval; Mariano Perez-Amor; J. L. Fernandez
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Paper Abstract

Transparent object Wave-Front Distortion has been measured in a Mach-Zehnder interferometer employing as evaluation tool the Multiplicative Analogical Moire Phase-Shifting Method. The measuring procedure is based on the direct superimposition of a transmission grating with a phase modulated high-frequency Mach-Zehnder spatial carrier. Latter, a set of phase-shifted fringe patterns, provided by low-pass filtering of the obtained multiplicative moire patterns, is combined in a Generic Phase-Shifting Algorithm (GPSA). The interesting information is achieved once the previous procedure is carried out with and without the transparent object located at the measuring area. The Wave- Front Distortion can be calculated by subtraction of these results provided by the GPSA or directly if a Differential PSA is employed. A comparison of the results obtained with both algorithms has been done.

Paper Details

Date Published: 13 August 1999
PDF: 7 pages
Proc. SPIE 3744, Interferometry '99: Techniques and Technologies, (13 August 1999); doi: 10.1117/12.357699
Show Author Affiliations
Benito Vasquez Dorrio, Univ. de Vigo (Spain)
Jose Carlos Lopez Vazquez, Univ. de Vigo (Spain)
Angel F. Doval, Univ. de Vigo (Spain)
Mariano Perez-Amor, Univ. de Vigo (Spain)
J. L. Fernandez, Univ. de Vigo (Spain)


Published in SPIE Proceedings Vol. 3744:
Interferometry '99: Techniques and Technologies
Malgorzata Kujawinska; Mitsuo Takeda, Editor(s)

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