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US 5,177,396 AGranted
Mirror with dichroic coating lamp housing
AssigneesGTE Products Corporation, GTE Sylvania Incorporated
InventorsJoseph G. M. G. Gielen, Louis L. J. M. Hoeben, Charles E. Mellor
Life of this patent
Estimating the term…
Abstract
A light mirror and a lamp including a light mirror are disclosed. The light mirror includes a light pervious substrate having a reflecting surface, a metal coating disposed in the reflecting surface, and a dichroic coating disposed on the metal coating. The dichroic coating is designed to reflect essentially all of the visible light spectrum and to transmit infra-red radiation and any unreflected portion of the visible light spectrum. A method for controlling the heat transmission of a cold light mirror is also disclosed.
Claims17
A lamp comprising:
- a light mirror having a reflector-shaped light pervious substrate partially enclosing an interior and having a reflecting surface, a reflective metal coating disposed on the reflecting surface of the reflector-shaped substrate, and a dichroic coating made of twenty nine alternating layers of SiO.sub.2 and ZnS disposed on the metal coating;
- and
- a light source capsule mounted within the interior of the reflector wherein the light mirror transmits less than 0.5% of light having wavelengths from about 430 nm to about 700 nm and reflects at least about 80% of light having wavelengths from about 800 nm to about 2500 nm.
Dependencies are inferred from the claim text.