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Phase-shifting by polarizer rotations in a common-path cube beam-splitter interferometer
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Paper Abstract

In this manuscript, a simple and low-cost method for phase-shifting interferometry by the rotation of a polarizer is presented. The principle of the proposal relies on the polarization aberration introduced by a cube beam-splitter due to its geometry, to the angular dependence with the coating and to the polarization angle of the input beam. The interferometric setup performs as a two-window common-path interferometer in which the added phase-shifting is achieved by simply rotating a polarizer at the interferometer output. The viability of the proposal is sustained with experimental results in which the phase-shift value and the resulting wavefront are calculated with Farrel’s technique and the Three-step PSI algorithm respectively.

Paper Details

Date Published: 3 September 2019
PDF: 6 pages
Proc. SPIE 11102, Applied Optical Metrology III, 111021D (3 September 2019); doi: 10.1117/12.2522190
Show Author Affiliations
U. Rivera-Ortega, Tecnológico de Monterrey (Mexico)
D. Lopez-Mago, Tecnológico de Monterrey (Mexico)


Published in SPIE Proceedings Vol. 11102:
Applied Optical Metrology III
Erik Novak; James D. Trolinger, Editor(s)

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