Resistant surface reflector
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United States of America Patent
Stats
-
Mar 23, 2004
Grant Date -
Mar 13, 2003
app pub date -
Aug 30, 2002
filing date -
Apr 27, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A reflector with high total reflection which is resistant to mechanical stresses. The reflector includes a reflector body and superimposed thereon (a) a functional coating such as a varnish, (b) a reflecting layer structure composed of a reflecting metallic layer and optionally arranged thereon one or several transparent ceramic layers, for example, layers having an optical depth of .lambda./2. The reflecting layer structure contains, as its surface layer, a protective layer. The protective layer is a silicon oxide of general formula SiO.sub.x, wherein x is a number from 1.1 to 2.0, or it is aluminum oxide of formula Al.sub.2 O.sub.3, in a thickness of 3 nm or more. The protective layer protects the underlying layers from mechanical damages. In the DIN 58196 abrasion test the protected surface does not show any damages after 50 test cycles with 100 abrasion strokes.
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International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 21 Citation Count
- G02B Class
- 70.51 % this patent is cited more than
- 21 Age
