Optical filter having multi-layer coating
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United States of America Patent
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Jan 7, 1997
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N/A
app pub date -
Mar 7, 1995
filing date -
Mar 7, 1994
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Abstract
In a multi-layer coating for a material of good transparency for visible light, with an emissivity e<0.04 and a light transmission T.gtoreq.78% and with two silver layers of different thickness, three oxide coatings are provided, and very thin metal or metal suboxide coatings as blockers, the oxide layers being alloys of the metals SnMg, SnAl, SnZr, SnTi or SnTa.
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