A Spectral Method for Rapidly Determining the Linear Birefringence of Thin Polymer Films
Dana Ortansa Dorohoi,
Dan Gheorghe Dimitriu
Abstract:A rapid and simple spectral method for determining the linear birefringence of thin anisotropic films, using the channeled spectra, is proposed in this article. Two channeled spectra must be recorded for a transparent system containing a thick anisotropic layer and a thin stretched polymer film, when the two anisotropic uniaxial layers have parallel and perpendicular optical axes, respectively. The sum and difference of the two channeled spectra indicate (by the positions of the maxima and minima in the result… Show more
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