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Refractive characteristics of thin polymer films♣

S. KASAROVA1,* , N. SULTANOVA1, T. PETROVA2, V. DRAGOSTINOVA2, I. NIKOLOV3

Affiliation

  1. Department of Mathematics and Physics, University “Assen Zlatarov" - Bourgas, 1 Prof. Yakimov Str., 8010 Bourgas, Bulgaria
  2. Central Laboratory of Optical Storage and Processing of Information, Bulgarian Academy of Sciences, Bl. 101, Acad. G. Bonchev Str., 1113 Sofia, Bulgaria
  3. Department of Optics and Spectroscopy, Faculty of Physics, Sofia University, 5 J. Bourchier Blvd., 1164 Sofia, Bulgaria

Abstract

In this study, we have investigated five types of optical plastic thin films, deposited on glass substrates from solutions with different concentrations. The refractive indices of Polyarylate, Polycarbonate, Polyester, Copolyesters A and B, produced by Eastman Chemical Company, have been measured on the principle of critical angle determination by means of diffraction pattern disappearance. A He-Ne laser and two laser diodes, emitting at 632.8 nm, 532 nm and 790 nm respectively, were used as light sources, and refractive index data of the investigated polymer films at these wavelengths have been obtained. On the basis of the measurements, the dispersion coefficients of the Sellmeier`s and Cauchy`s approximations were calculated. Comparative dispersion curves of the examined materials are presented..

Keywords

Thin polymer films, Refractive index, Dispersion curves.

Submitted at: Nov. 5, 2008
Accepted at: Oct. 3, 2009

Citation

S. KASAROVA, N. SULTANOVA, T. PETROVA, V. DRAGOSTINOVA, I. NIKOLOV, Refractive characteristics of thin polymer films♣, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 10, pp. 1440-1443 (2009)