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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 13,
  • Issue 1,
  • pp. 012601-012601
  • (2015)

Spectral technique for measuring phase retardation of a wave plate

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Abstract

We present a technique and algorithm for measuring the phase retardation of a wave plate based on spectral transmission curve. Through accurately extracting the intersection points' wavelengths from the spectral transmission curve, the effective phase retardation, absolute phase retardation, order, and physical thickness of the wave plate can be measured simultaneously in a wide spectral range. Experimental results show that the proposed technique has many advantages, such as higher data utilization, simpler extraction algorithm, and no strict requirement for the directions of transmission axes of the polarizer and analyzer, and the fast axis of the wave plate.

© 2015 Chinese Optics Letters

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