The application of Edser-Butler fringes to the measurement of the spatial optical structure of liquid crystal prisms and the determination of dispersion characteristics and thickness
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An application of liquid crystals to astronomical adaptive optics which would produce sharpened images from optical telescopes is proposed. To measure the appropriate optical properties a method is described for determining the dispersion and thickness of a thin film based on a spectroscopic technique using Edser-Butler fringes. The application to birefringent media, in particular liquid crystals, and a method for assessing the fine structure is discussed. Results of measurements of the dispersion of liquid crystal BDH-E44 are given.
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