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Open AccessArticle

Online Characterization Algorithms for Optical Coating Production with Broadband Monitoring

1
Research Computing Center, Lomonosov Moscow State University, Leninskiye Gory, Moscow 119992, Russian Federation
2
Faculty of Physics, Lomonosov Moscow State University, Leninskiye Gory, Moscow 119991, Russian Federation
*
Author to whom correspondence should be addressed.
Coatings 2018, 8(9), 323; https://doi.org/10.3390/coatings8090323
Received: 28 July 2018 / Revised: 6 September 2018 / Accepted: 13 September 2018 / Published: 14 September 2018
(This article belongs to the Special Issue Applications of Optical Thin Film Coatings)
Algorithms for the online determination of thicknesses of already-deposited layers are important for the reliable control of optical coating production. Possible ways of constructing such algorithms in the case of coating production with direct broadband monitoring are discussed. A modified triangular algorithm is proposed. In contrast to the well-known triangular algorithm, the new algorithm does not determine all thicknesses of previously deposited layers but only those for which an increase in the accuracy of their determination is to be expected. The most promising algorithms are compared in terms of their accuracy and operational speed. It is shown that the modified triangular algorithm is much faster than the triangular algorithm, and both algorithms have close accuracy. The operational speed of the modified triangular algorithm can be a decisive factor for its use in modern broadband monitoring systems. View Full-Text
Keywords: thin films; coatings; optical monitoring; online characterization thin films; coatings; optical monitoring; online characterization
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MDPI and ACS Style

Tikhonravov, A.; Kochikov, I.; Isaev, T.; Lukyanenko, D.; Yagola, A. Online Characterization Algorithms for Optical Coating Production with Broadband Monitoring. Coatings 2018, 8, 323.

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