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USING THE SOLC OPTICAL FILTER FOR DETERMINATION OF CRYSTALLINE PLATES THICKNESS

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A new method for increasing the accuracy of measuring the difference in the thicknesses of two anisotropic plates using the Solc interference filter is proposed. Non-monochromatic radiation, after passing through the crossed Solc filter, has a periodic distribution of radiation intensity over wavelengths. The distance between neighboring radiation minima is proposed to be used for a rough estimate, and the study of polarization parameters of the radiation makes it possible to refine the obtained data. This method allows to determine a crystal plate thickness with an accuracy of 0.1 μm.

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