Birefringence measurement using rotating analyzer approach and quadrature cross points

Marwan Jamal Abuleil, Ibrahim Abdulhalim

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

A new technique for birefringence measurement and extracting the coefficients of the dispersion relation such as Cauchy or Sellmeier equations is proposed. The main principle of the technique is based on finding accurately the wavelengths that the birefringent plate operates as a quarter-wave plate (QWP) and measuring the birefringence at these points. As the projections of the ordinary and extraordinary beams on the analyzer axis interfere, the setup is a form of common path interferometer and these QWP points are the quadrature points at which the sensitivity of the interferometer is optimum. An algorithm is developed to find these crossing points precisely. Implementation of this technique has been done on two different kinds of nematic liquid crystal wave plates made of Merck E44 and BL036.

Original languageEnglish
Pages (from-to)2097-2104
Number of pages8
JournalApplied Optics
Issue number10
DOIs
StatePublished - 1 Apr 2014

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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