Achromatic liquid crystal polarization modulator

Daniel Gisler; Alex Feller; Achim M. Gandorfer

doi:10.1117/12.458835

14 February 2003 Achromatic liquid crystal polarization modulator

Daniel Gisler, Alex Feller, Achim M. Gandorfer

Proceedings Volume 4843, Polarimetry in Astronomy; (2003) https://doi.org/10.1117/12.458835
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

The design of an achromatic polarisation modulator is presented. The modulator is based on a combination of three electrically switchable non-achromatic ferroelectric liquid crystal retarders. The design follows the idea by Pancharatnam who first introduced suitable achromatic combinations of crystal retarders. We combined three ferroelectric liquid crystal retarders to create an electrically switchable achromatic halfwave plate which can be used in the spectral range from 400 nm to 750 nm. Different designs are theoretically modeled and compared under the aspects of their individual response to temperature fluctuations and useful wavelength range. First results of laboratory tests are presented to experimentally evaluate the feasibility of the concept.

Citation Download Citation

Daniel Gisler, Alex Feller, and Achim M. Gandorfer "Achromatic liquid crystal polarization modulator", Proc. SPIE 4843, Polarimetry in Astronomy, (14 February 2003); https://doi.org/10.1117/12.458835

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