A new technique to measure the principal refractive indexes of a nematic liquid crystal is presented. The method is based on an indirect measurement of the refraction angle by determining the direction of a magnetic field which minimizes the light scattering. With this technique one can perform different light scattering experiments, which require a knowledge of the refractive indexes, on the same crystal slab. The accuracy is better than ±0.15%. A discussion about the systematic error due to the distortion of the director profile near the holder edges and the relative correction is given.
|Titolo:||Direct measurement of the two principal refractive indexes of a nematic liquid crystal slab|
|Data di pubblicazione:||1982|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1364/AO.21.004163|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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