A new application of the optical vortex birefringence compensator has been presented. Two parameters of elliptically birefringent medium, an ellipticity angle and an optical path difference, can be measured simultaneously in the setup based on the C polarization type singularities generated using two Wollaston compensators. The theory and numerical investigations of the proposed method have been presented as well as some experiments verifying our theoretical predictions.
© 2008 Optical Society of America
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