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

U. Rivera-Ortega; D. Lopez-Mago

doi:10.1117/12.2522190

3 September 2019 Phase-shifting by polarizer rotations in a common-path cube beam-splitter interferometer

U. Rivera-Ortega, D. Lopez-Mago

Proceedings Volume 11102, Applied Optical Metrology III; 111021D (2019) https://doi.org/10.1117/12.2522190
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

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.

Citation Download Citation

U. Rivera-Ortega and D. Lopez-Mago "Phase-shifting by polarizer rotations in a common-path cube beam-splitter interferometer", Proc. SPIE 11102, Applied Optical Metrology III, 111021D (3 September 2019); https://doi.org/10.1117/12.2522190

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