Technical aspects of measurements of helical parameters in chiral phases

Jerzy Kedzierski; Pawel Perkowski; Zbigniew Raszewski; Jolanta Rutkowska; Wiktor Piecek; Ludwika Lipinska

doi:10.1117/12.299957

1 February 1998 Technical aspects of measurements of helical parameters in chiral phases

Jerzy Kedzierski, Pawel Perkowski, Zbigniew Raszewski, Jolanta Rutkowska, Wiktor Piecek, Ludwika Lipinska

Proceedings Volume 3318, Liquid Crystals: Physics, Technology, and Applications; (1998) https://doi.org/10.1117/12.299957
Event: Liquid Crystals, 1997, Zakopane, Poland

Abstract

The helical pitch for cholesteric and ferroelectric Sm C^* phases has been measured. For cholesteric and also for Sm C^* measurements have been done for several mixtures characterized by various concentration of chiral molecules. They have been done in planar geometry for cholesteric phase and in homeotropic geometry for Sm C^* phase. Measurements involving reflection and transmission modes have been carried out. It has been used Grandjean-Cano method. We have done conoscopic and orthoscopic observations. Sign of the chirality has been found by Airy's spires method.

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Jerzy Kedzierski, Pawel Perkowski, Zbigniew Raszewski, Jolanta Rutkowska, Wiktor Piecek, and Ludwika Lipinska "Technical aspects of measurements of helical parameters in chiral phases", Proc. SPIE 3318, Liquid Crystals: Physics, Technology, and Applications, (1 February 1998); https://doi.org/10.1117/12.299957

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