AN OPTICAL METHOD FOR THE DETERMINATION OF THE CHOLESTERIC PITCH IN LIQUID-CRYSTALS

Authors
DIERKING I GIESSELMANN F ZUGENMAIER P
Citation
I. Dierking et al., AN OPTICAL METHOD FOR THE DETERMINATION OF THE CHOLESTERIC PITCH IN LIQUID-CRYSTALS, Zeitschrift fur Naturforschung. A, A journal of physical sciences, 50(6), 1995, pp. 589-594
Citations number
19
Categorie Soggetti
Chemistry Physical",Physics
Journal title
Zeitschrift fur Naturforschung. A, A journal of physical sciences → ACNP
ISSN journal
09320784
Volume
50
Issue
6
Year of publication
1995
Pages
589 - 594
Database
ISI
SICI code
0932-0784(1995)50:6<589:AOMFTD>2.0.ZU;2-#
Abstract
Preparation of a cholesteric liquid crystalline phase in planar orient ing liquid crystal cells exhibits discontinuous colour changes with te mperature when viewed between crossed polarizers. The transmission spe ctra of such a system can be described by a modified de Vries equation , with the birefringence dispersion included in a simplified single-ba nd model. With a suitable choice of the cell gap as compared to the ch olesteric pitch, the procedure can be used as a new method to determin e the temperature dependence of the cholesteric pitch.