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The tilt angle, strongly influencing the static as well as the dynamic behaviour of liquid crystal devices often causes problems in time and precision during its measurement. This paper presents a fast and accurate method, based on the magnetic null principle with optical detection. Improved sensitivity of detection of challges in optical transmission ensures reliable measurement of small tilt angles even in thin films of liquid crystals. Theoretical background of the method, details of the mechanical construction and experimental data are reported.
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Kosmowski et al. (1981) studied this question.
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