Abstract

The refractive index of a sample of As<sub>2</sub>S<sub>3</sub> was determined at three temperatures near 19°, 25°, and 31°C for selected wavelengths in the range 0.57 µ to 11.8 µ. A five term Sellmeier type dispersion equation was fitted to the averaged data reduced to 25°C; four of the constants were chosen to approximate an absorption continuum in the ultraviolet and visible while the fifth term was arbitrarily chosen as beyond the infrared absorption edge. The indexes of refraction in the visible region of two other samples were obtained for comparison.

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  1. R. Frerichs, Phys. Rev. 78, 643 (1950); J. Opt. Soc. Am. 43, 1153 (1953).
  2. W. A. Fraser and J. Jerger, Jr., J. Opt. Soc. Am. 43, 322A (1953).
  3. F. W. Glaze et al., J. Research Natl. Bur. Standards 59, 83 (1957), RP 2774.
  4. W. S. Rodney and R. J. Spindler, J. Research Natl. Bur. Standards 51, 123 (1953).
  5. W. S. Rodney and I. H. Malitson, J. Opt. Soc. Am. 46, 11, 956 (1956).
  6. Private communication.
  7. W. A. Fraser, Proceedings of the Conference on Infrared Optical Materials, Filters and Films ERDL, (Fort Belvoir, Virginia, 1955).

Fraser, W. A.

W. A. Fraser and J. Jerger, Jr., J. Opt. Soc. Am. 43, 322A (1953).

W. A. Fraser, Proceedings of the Conference on Infrared Optical Materials, Filters and Films ERDL, (Fort Belvoir, Virginia, 1955).

Frerichs, R.

R. Frerichs, Phys. Rev. 78, 643 (1950); J. Opt. Soc. Am. 43, 1153 (1953).

Glaze, F. W.

F. W. Glaze et al., J. Research Natl. Bur. Standards 59, 83 (1957), RP 2774.

Jerger, Jr., J.

W. A. Fraser and J. Jerger, Jr., J. Opt. Soc. Am. 43, 322A (1953).

Malitson, I. H.

W. S. Rodney and I. H. Malitson, J. Opt. Soc. Am. 46, 11, 956 (1956).

Rodney, W. S.

W. S. Rodney and I. H. Malitson, J. Opt. Soc. Am. 46, 11, 956 (1956).

W. S. Rodney and R. J. Spindler, J. Research Natl. Bur. Standards 51, 123 (1953).

Spindler, R. J.

W. S. Rodney and R. J. Spindler, J. Research Natl. Bur. Standards 51, 123 (1953).

Other

R. Frerichs, Phys. Rev. 78, 643 (1950); J. Opt. Soc. Am. 43, 1153 (1953).

W. A. Fraser and J. Jerger, Jr., J. Opt. Soc. Am. 43, 322A (1953).

F. W. Glaze et al., J. Research Natl. Bur. Standards 59, 83 (1957), RP 2774.

W. S. Rodney and R. J. Spindler, J. Research Natl. Bur. Standards 51, 123 (1953).

W. S. Rodney and I. H. Malitson, J. Opt. Soc. Am. 46, 11, 956 (1956).

Private communication.

W. A. Fraser, Proceedings of the Conference on Infrared Optical Materials, Filters and Films ERDL, (Fort Belvoir, Virginia, 1955).

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