| 摘要 |
Reflector for technical lighting purposes, having a reflecting surface of aluminium and a protective, transparent, pore-free barrier layer of aluminium oxide produced by anodising having a dielectric constant of 6 to 10.5 at 20.degree.C, where the barrier layer is of thickness d that either salisrles the condition a) for constructive interference: d or b) for achieving a colour-toned reflector surface: ¢k or c) for using as starting material to produce reflectors with LI/HI multi-layer coatings that increase reflectivity. d where n is the refractive index of the barrier layer, .lambda. is the average wave length of the light striking the surface of the reflector, k is a natural number and ? is a natural number that is uneven. The thickness of the barrier layer lies between 60 and 490 nm and does not vary by more than + 5% over the whole of the aluminium surface.
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