Polarization plane rotator used as a phase stepping device in a 2-channel shearing speckle interferometer

Peter A. A. M. Somers; Nandini Bhattacharya

doi:10.1117/12.612562

13 June 2005 Polarization plane rotator used as a phase stepping device in a 2-channel shearing speckle interferometer

Peter A. A. M. Somers, Nandini Bhattacharya

Proceedings Volume 5856, Optical Measurement Systems for Industrial Inspection IV; (2005) https://doi.org/10.1117/12.612562
Event: Optical Metrology, 2005, Munich, Germany

Abstract

A polarization phase stepping method is presented based on the use of a polarization plane rotator that establishes a relative phase shift between two counter-rotating circularly polarized beams. The phase step can be made relatively accurate, since it just depends on the accuracy with which the rotator is manufactured, and not on its orientation. The phase stepping method has been implemented in a single-camera two-channel shearing speckle interferometer, with two optical channels, and a relative phase step of π/2 between them.

Citation Download Citation

Peter A. A. M. Somers and Nandini Bhattacharya "Polarization plane rotator used as a phase stepping device in a 2-channel shearing speckle interferometer", Proc. SPIE 5856, Optical Measurement Systems for Industrial Inspection IV, (13 June 2005); https://doi.org/10.1117/12.612562

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