METHOD AND APPARATUS FOR INCREASING THE USEFUL LIFE OF A QUARTZ ENVELOPE IN A HIGH POWER LIGHT SOURCE

摘要

In a high power light radiator having a light transmitting quartz shell with a total radiation loading incident upon such shell in the order of at least about 2000 watts per sq. inch of surface area with a proportional part of such radiation having wavelengths below 1600 A wherein the quartz susceptibility to deterioration is decreased by the addition of an additive such as titanium or an oxide thereof to said quartz.