Patent ID: 6848797
Filing Date: 2005-02-01
Classification: F21V,G02B

Abstract:
1. A reflector which is resistant to mechanical attack and has high total reflectance, comprising a reflector body and arranged thereon in the following sequence: (a) a functional coating, (b) a sequence of layers containing (b)(1) one reflective layer and (b)(2) several transparent layers, and (c) a protective layer as surface layer, the functional coating (a) is (a)(i), a gel film applied by sol-gel process and the gel film is a coating of at least organofunctional silane of a metal compound, or (a)(ii), in the case of the reflector body being aluminum, the gel film (a)(I) and an aluminum oxide layer formed by anodic oxidation of the aluminum reflector body, the aluminum oxide layer being between the gel film (a)(I) and the aluminum reflector body, and the protective layer is a silicon oxide having the general formula SiO x , where x is a number from 1.1 to 2.0, or an aluminum oxide having the formula Al 2 O 3 , and has a thickness of 3 nm to 20 nm, the protective layer as the surface layer protects subjacent layers against mechanical damage, and the protective layer shows no surface damage in a wiping test according to DIN 58196 after 50 test cycles of 100 wiping strokes each.