B - Operations – Transporting – 60 – Q
Patent
B - Operations, Transporting
60
Q
B60Q 1/04 (2006.01) G02B 1/10 (2006.01) G02B 5/08 (2006.01) G02B 5/22 (2006.01)
Patent
CA 2364533
The invention relates to a cover part for a light source (11), in particular for a headlight lamp arranged in a motor vehicle headlight (L), having a wall (W), which has a first side (A), which faces the light source (11) and has a light-absorbing action, and a second side (B), which preferably has a reflective action. In order, in a cover part of this type, firstly to achieve a high light absorption and secondly to achieve use characteristics which are improved under operating conditions which in particular involve high thermal loads and a longer service life, combined with a production method involving minimum possible outlay, the wall (W) consists of a composite material having a metallic substrate, to which, on the first side (A), an optically active multilayer system composed of three layers is applied, the top layer of which multilayer system is a dielectric layer, preferably an oxide, fluoride or nitride layer of chemical composition MeO z, MeF r, MeN s with a refractive index n < 1~8, and the middle layer of which multilayer system is a chromium oxide layer of chemical composition CrO x, and the bottom layer of which multilayer system consists of gold, silver, copper, chromium, aluminium, nickel and/or molybdenum, the indices x, z, r and s indicating a stoichiometric or non-stoichiometric ratio in the oxides, fluorides or nitrides.
Ganz Klaus
Reichert Werner
Alanod Aluminium-Veredlung Gmbh & Co. Kg
Dennison Associates
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