27 November 2012 Method for measuring retardation of infrared wave-plate by modulated-polarized visible light
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Proceedings Volume 8559, Information Optics and Optical Data Storage II; 855903 (2012); doi: 10.1117/12.999702
Event: Photonics Asia, 2012, Beijing, China
Abstract
A new method for precisely measuring the optical phase retardation of wave-plates in the infrared spectral region is presented by using modulated-polarized visible light. An electro-optic modulator is used to accurately determine the zero point by the frequency-doubled signal of the Modulated-polarized light. A Babinet-Soleil compensator is employed to make the phase delay compensation. Based on this method, an instrument is set up to measure the retardations of the infrared wave-plates with visible region laser. Measurement results with high accuracy and sound repetition are obtained by simple calculation. Its measurement precision is less than and repetitive precision is within 0.3%.
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Ying Zhang, Feijun Song, "Method for measuring retardation of infrared wave-plate by modulated-polarized visible light", Proc. SPIE 8559, Information Optics and Optical Data Storage II, 855903 (27 November 2012); doi: 10.1117/12.999702; http://dx.doi.org/10.1117/12.999702
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KEYWORDS
Modulation

Infrared radiation

Visible radiation

Signal processing

Bandpass filters

Calibration

Filtering (signal processing)

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