The order parameter $S$ of homeotropically oriented thin liquid-crystal polymer films placed in an electrooptical cell has been determined. The optical parameters of electrodes have been determined from the observed quasi-periodic polarization spectra by the method of interferometric extrema envelopes and the true polarization absorption spectrum of the polymer has been restored. The quantity $S$ has been calculated from the dichroic ratio in the absorption band at $\lambda=405$ nm with due regard for the local field effects.
Department of General Physics, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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