Simultaneous measurement of birefringence magnitude and direction using Wollaston prism

Longhai Liu; Aijun Zeng; Beishi Chen; Lexing Zheng; Huijie Huang

doi:10.1117/12.999670

20 November 2012 Simultaneous measurement of birefringence magnitude and direction using Wollaston prism

Longhai Liu, Aijun Zeng, Beishi Chen, Lexing Zheng, Huijie Huang

Proceedings Volume 8563, Optical Metrology and Inspection for Industrial Applications II; 85630P (2012) https://doi.org/10.1117/12.999670
Event: Photonics Asia, 2012, Beijing, China

Abstract

Simultaneous measurement of the birefringence magnitude and direction using Wollaston prism is presented. The sinusoidally modulated laser beam passes through a circular polarizer, the birefringence sample and is split by a Wollaston prism. The measuring beam is then detected by a bi-cell detector and two alternating current signals are detected. Then the Wollaston prism is rotated by 45°, and another two alternating current signals are obtained. By processing the four signals, the birefringence magnitude and direction is resolved simultaneously. In experiments, a wedge waveplate was laterally moved and measured at different birefringence magnitude. The measured birefringence magnitude linearly increased as the wedge waveplate was laterally moved. The maximum standard deviation of the birefringence magnitude and direction is 0.11° and 0.05°The usefulness of this method is verified.

Citation Download Citation

Longhai Liu, Aijun Zeng, Beishi Chen, Lexing Zheng, and Huijie Huang "Simultaneous measurement of birefringence magnitude and direction using Wollaston prism", Proc. SPIE 8563, Optical Metrology and Inspection for Industrial Applications II, 85630P (20 November 2012); https://doi.org/10.1117/12.999670

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KEYWORDS

Birefringence

Prisms

Wave plates

Signal detection

Sensors

Modulation

Circular polarizers

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