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Compact liquid-crystal-polymer Fourier-transform spectrometer

Gerben Boer, Patrick Ruffieux, Toralf Scharf, Peter Seitz, and René Dändliker

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Abstract

We present the optical design and realization of a low-resolution liquid-crystal (LC) Fourier-transform spectrometer (FTS). This FTS is based on a polarization interferometer that has a Wollaston prism made of a LC material as a key component. It has a compact design, a good acceptance angle, and low temperature dependence and can be fabricated with cost-effective LC technology. Because the LC is polymerized, it is robust, and the temperature dependence is drastically reduced. The performance of a compact handheld version of the spectrometer and the characteristics (angular dependence, resolution, stray light, and temperature dependence) will be discussed.

© 2004 Optical Society of America

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