Proposed method for phase retardation measurements using polarimetric techniques
National Institute of Standards (NIS), Tersa St. Haram, P.O. Box: 136 Giza 12211, Egypt.
Research Article
Global Journal of Engineering and Technology Advances, 2021, 09(02), 054–056.
Article DOI: 10.30574/gjeta.2021.9.2.0150
Publication history:
Received on 05 October 2021; revised on 9 November 2021; accepted on 11 November 2021
Abstract:
Phase retardance elements such as quarter, half and full waveplates are essential elements in the most of the polarization systems. So, they should be determined precisely. Accurate determination of the phase retardation for these elements are necessary and critical due to its effect on the optical polarization measurements. In this paper we measure two-dimensional phase retardation distribution of half wave plate using four step phase shifting technique for accurate retardance measurements through the whole surface of the wave plate. By using this technique, four images are captured, which are related to different orientation of the azimuth angle of the analyzer, and mathematically analyzed to obtain the phase retardance measurements. The mean value of the phase retardance measurements is 182.57˚ with uncertainty 0.6˚.
Keywords:
Optical retardation; Polarimetric system; Half wave plate; Four step phase shifting technique.
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Copyright © 2021 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution Liscense 4.0