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Proceedings Paper

Improved AR coating reflection color uniformity and stability using multiple anodes and fuzzy logic control in DC reactive sputter coating
Author(s): C. H. Burton
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Paper Abstract

DC reactive magnetron sputter techniques have been developed for the application of antireflection (AR) coatings to plastic ophthalmic lenses. The method described here uses the Deposition Sciences Inc. (DSI) MicrodynTM process in which the lenses are mounted on a spinning drum adjacent to two 40" long planar magnetron cathodes. Improvement in deposition uniformity along the length of the cathodes was accomplished by the use of multiple active anodes. Improvement in run to run stability was accomplished by use of fuzzy logic control techniques. Details of this Multiple-Anode Fuzzy-Logic (MAFL) process will be discussed in relation to the significant improvement in control of reflectance color of anti-reflection coated eyeglass lenses. For a specific anti-reflection coating, control of color coordinate a* was improved by a factor of 2.5 and b* by a factor of 5.0

Paper Details

Date Published: 19 August 2005
PDF: 11 pages
Proc. SPIE 5870, Advances in Thin-Film Coatings for Optical Applications II, 587008 (19 August 2005); doi: 10.1117/12.618976
Show Author Affiliations
C. H. Burton, AFG Development Corp. (United States)


Published in SPIE Proceedings Vol. 5870:
Advances in Thin-Film Coatings for Optical Applications II
Michael L. Fulton; Jennifer D. T. Kruschwitz, Editor(s)

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