ALUMINIUMOBERFLÄCHEN FÜR LICHTTECHNISCHE ZWECKE

An Al surface is anodised to produce a transparent as well as pore free oxide coating having a dielectric constant at 20 degrees C of 6-10.5. The thickness of the coating (d) is dependent on the use as follows: (i) for constructive use, d.n = k lambda /2 plus or minus 20 nm; (ii) for a tinted reflec...

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Bibliographische Detailangaben
1. Verfasser:	GILLICH, VOLKMAR
Format:	Patent
Sprache:	ger
Schlagworte:	APPARATUS THEREFOR BLASTING CHEMISTRY ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF HEATING LIGHTING MECHANICAL ENGINEERING METALLURGY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR WEAPONS
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Zusammenfassung:	An Al surface is anodised to produce a transparent as well as pore free oxide coating having a dielectric constant at 20 degrees C of 6-10.5. The thickness of the coating (d) is dependent on the use as follows: (i) for constructive use, d.n = k lambda /2 plus or minus 20 nm; (ii) for a tinted reflector surface, k lambda /2+20 nm < d.n < (k+l) lambda /2-20 nm; and (iii) for use as starting material to produce high reflection LI:HI multi-layered reflectors, d.n = I lambda /4 plus or minus 20 nm, where n is the refractive index, the average wave length of the light hitting the surface, k is a constant and I is an uneven natural number. The thickness of the coating is 60-490 nm and the thickness fluctuation over the whole surface is not more than 5%.