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Proceedings Paper

A polarimeter using two photoelastic modulators
Author(s): Baoliang Wang; Richard R. Rockwell; Andy Leadbetter
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Paper Abstract

We describe in this paper a special polarimeter for measuring linear birefringence in transparent optical samples. The polarimeter employs two photoelastic modulators that operate at different frequencies (50 KHz and 60 KHz). The resulting electronic signal at the detector is processed using two methods: demodulation by lock-in amplifiers or using Fourier analysis of a digitized waveform. We compare the results obtained by using the two signal processing methods in this special polarimeter and discuss how each method benefits selected applications.

Paper Details

Date Published: 2 August 2004
PDF: 8 pages
Proc. SPIE 5531, Interferometry XII: Techniques and Analysis, (2 August 2004); doi: 10.1117/12.559944
Show Author Affiliations
Baoliang Wang, Hinds Instruments, Inc. (United States)
Richard R. Rockwell, Hinds Instruments, Inc. (United States)
Andy Leadbetter, Hinds Instruments, Inc. (United States)


Published in SPIE Proceedings Vol. 5531:
Interferometry XII: Techniques and Analysis
Katherine Creath; Joanna Schmit, Editor(s)

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