Reflection at the Boudary Between Glass and Chloesteric Liquid Crystals

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Abstract
Reflection at the interface between glass and cholesteric liquid crystals in theoretically investigated for the case of normal incidence using Oseen-DeVries' model. Attention is focused on the case where the average index of refraction of the liquid crystal differs from the glass refractive index. It is then found that the general shape of the reflection spectrum is highly dependent on the polarization of the incident beam. Thus, for example, two incident waves which are linearly polarized in different directions will generally have their peak reflections at different wavelenghts. The shape of the spectrum also depends, for a given liquid crystal, on the refractive index of the glass.