Determination OT the optical constants n and k of an absorbing material with the help of a transparent material coating

X. Gervaux

doi:10.1117/12.2297975

4 December 2017 Determination OT the optical constants n and k of an absorbing material with the help of a transparent material coating

X. Gervaux

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Proceedings Volume 1576, 16th International Conference on Infrared and Millimeter Waves; 15767A (2017) https://doi.org/10.1117/12.2297975
Event: 16th International Conference on Infrared and Millimeter Waves, 1991, Lausanne, Switzerland

Abstract

It has been shown (1) that the reflection of an absorbing medium covered with a convenient transparent film gives interference fringes irregularly spaced because of the specific phase shift at the reflection on the absorbing material. Two equations allow the determination of n and k (n = n - jk is the complex refractive index corresponding to a monochromatic wave E = Eoe^jwt), if we know the fringes position and the corresponding reflection power at the minima and maxima.

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X. Gervaux "Determination OT the optical constants n and k of an absorbing material with the help of a transparent material coating", Proc. SPIE 1576, 16th International Conference on Infrared and Millimeter Waves, 15767A (4 December 2017); https://doi.org/10.1117/12.2297975

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KEYWORDS

Reflection

Germanium

Coating

Glasses

Crystals

Oscillators

Phase shifts

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