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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 51, Iss. 12 — Dec. 1, 1961
  • pp: 1406–1408

Special Type of Double-Layer Antireflection Coating for Infrared Optical Materials with High Refractive Indices

J. T. Cox  »View Author Affiliations


JOSA, Vol. 51, Issue 12, pp. 1406-1408 (1961)
http://dx.doi.org/10.1364/JOSA.51.001406


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Abstract

A special type of double-layer antireflection coating for infrared optical materials is described. This coating has two unusual features: the total optical thickness of the double layer is less than one-quarter wavelength; and the film with the higher index of refraction is on the outside. The reduction in reflectance in the low reflecting region is similar to that of a single-layer coating. Measured values of transmittance are given for coatings on Si and Ge. An interesting point in one of the examples is the use of a Ge film in the antireflection coating for Ge. The coatings are very durable.

Citation
J. T. Cox, "Special Type of Double-Layer Antireflection Coating for Infrared Optical Materials with High Refractive Indices," J. Opt. Soc. Am. 51, 1406-1408 (1961)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-51-12-1406

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