The equivalence between surface roughness and an absorbing layer on the surface

C. K. Carniglia; D. G. Jensen

doi:10.1364/OIC.2001.TuB5

Optical Interference Coatings
OSA Technical Digest Series (Optica Publishing Group, 2001),
paper TuB5
•https://doi.org/10.1364/OIC.2001.TuB5

The equivalence between surface roughness and an absorbing layer on the surface

C. K. Carniglia and D. G. Jensen

Optical Interference Coatings 2001

Banff Canada
ISBN: 1-55752-682-6

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Design of Optical Coatings II (TuB)

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C. K. Carniglia and D. G. Jensen, "The equivalence between surface roughness and an absorbing layer on the surface," in Optical Interference Coatings, OSA Technical Digest Series (Optica Publishing Group, 2001), paper TuB5.

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Abstract

Random roughness of an optical surface reduces its specular reflectance and transmittance by scattering light. This reduction can be modeled using an absorbing layer on the surface. If a Drude effective-medium approximation is used for the layer index, the layer with a thickness twice the RMS roughness of the surface correctly models the scattered light.

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