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Two methods of refractometry in reflected light from optical surface ofsamples are considered and studied experimentally. Methods are grounded onresults of Fresnel theory of concerning light reflectivity at near normalincidence and Brewster angle. Sources of errors for both methods wereconsidered and possibility of measuring of the refractive index withapplication of laser radiation with accuracy to within 4th sign was shown.Advantages of described methods concerning requirements to preparation ofsamples to refractive index measurement of solid, thin-film and absorbingmaterials are scored.

Studying of refractive index measurements in reflected light