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EN
The practical problem of the lack of a quarter-wave plate for an arbitrary wavelength has been solved in our earlier work. The possibility of substituting this plate with a combination of two (or more) retardation plates with phase shift different from 90° has been shown. However, there are some special cases in which another wave plate commonly used in polarization optics is needed, i.e., a half-wave plate. In the present paper some formulae have been derived for several of the most important applications of these retardation plates in measuring setup.
EN
A method of measurement of the optical path difference introduced by the elliptically birefringent medium is presented. The method is based on the spectral analysis of the white light passing through the medium. It offers a wide range of measured path differences and the possibility of being easily applied in an automated measurement setup.
EN
A method for measuring the birefringence properties of nondichroic media using the Poincare sphere is presented. Simple relations between coordinates of points on the Poincare sphere representing input and output polarization states of light and the point representing first eigenvector of the medium have been found. From these relations the desired polarization parameters of the medium were calculated.
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