An improved achromatic half-wave plate phase shifter for white light interferometry

Suja Helen Simson; Mahendra Prasad Kothiyal; Rajpal Singh Sirohi

doi:10.1117/12.685080

12 October 2006 An improved achromatic half-wave plate phase shifter for white light interferometry

Suja Helen Simson, Mahendra Prasad Kothiyal, Rajpal Singh Sirohi

Proceedings Volume 6382, Two- and Three-Dimensional Methods for Inspection and Metrology IV; 63820L (2006) https://doi.org/10.1117/12.685080
Event: Optics East 2006, 2006, Boston, Massachusetts, United States

Abstract

Polarization components can be used as nearly achromatic phase shifters in an interferometers. Here wepresent an improved achromatic half-wave plate (HWP) phase shifter that can be incorporated at the input end of a white light interferometer. A nearly achromatic HWP phase shifter that can be used at the input of an interferometer consists of a rotating HWP followed by a quarter wave plate (QWP) fixed at an azimuth of 45°. An improved achromatic phase shifter for the input end can be constructed using achromatic circular polarizers. The performance of this achromatic HWP phase shifter when used at the input end of a white light interferometer is studied using Jones calculus. The calculated values of the phase shifts between the interfering beams and their amplitudes are very nearly same for all the wavelengths. This phase shifter thus gives much improved performance.

Citation Download Citation

Suja Helen Simson, Mahendra Prasad Kothiyal, and Rajpal Singh Sirohi "An improved achromatic half-wave plate phase shifter for white light interferometry", Proc. SPIE 6382, Two- and Three-Dimensional Methods for Inspection and Metrology IV, 63820L (12 October 2006); https://doi.org/10.1117/12.685080

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KEYWORDS

Phase shifts

Interferometers

Wave plates

Polarization

Circular polarizers

Optical interferometry

Jones calculus

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