Patent ID: 6670045
Filing Date: 2003-12-30
Classification: G02B,Y10T

Abstract:
A reflector with high total reflection, and resistant to mechanical stress, containing a reflector body made of a rolled metal sheet on which are superimposed:(a) a functional coating comprising a gel film, varnish or polymer with a thickness ranging from 0.5 to 20 &mgr;m, the functional coating overlying and being directly on the reflector body; and (b) a reflection layer structure composed of (i) a reflecting metallic layer overlying and being directly on the functional coating; (ii) a plurality of transparent layers overlying the reflecting metallic layer, one of the transparent layers being directly on the reflecting metallic layer, and each of the other transparent layers overlying and being directly on one of the transparent layers, and (iii) a scratch proof protective layer overlying and being directly on the transparent layer furthest away from the reflecting metallic layer, surface of the protective layer away from the reflector body has no layer thereon, the protective layer comprises a silicon oxide of formula SiOx where x represents a number from 1.1 to 2.0 or aluminum oxide of formula Al2O3, the protective layer has a thickness of 3 nm to 20 nm, the protective layer, being on the surface of the reflector away from the reflector body, protects underlying layers against mechanical damage, and the protective layer exhibits no surface damage in wipe test according to DIN 58196 after 50 test cycles each of 100 wiping strokes.