High temperature lamps having uv absorbing quartz envelope

Details High temperature lamps having uv absorbing quartz envelope High temperature lamps having uv absorbing quartz envelope

H - Electricity

01

K

H01K 1/28 (2006.01) H01J 61/30 (2006.01) H01J 61/40 (2006.01)

Patent

CA 2087778

Fused quartz containing both titanium dioxide and cerium oxide as UV absorbing dopants has been found to be particularly effective for lamp envelopes for high temperature lamps such as halogen-incandescent lamps and metal halide arc discharge lamps which emit both UV and visible light radiation. The codoped quartz transmits visible radiation and absorbs a substantial portion of the emitted UV radiation. The UV absorption is far superior at temperatures above 500°C and the codoped quartz does not react with the fill within.

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