Electric lamp

Details Electric lamp Electric lamp

1994-12-12

1996-07-30

Patel, Nimeshkumar D.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Polarizer or special ray transmission

313636, 313493, 501 53, 501 64, 501 69, H01J 6130, H01J 6138

Patent

active

055414710

ABSTRACT:
An electric lamp has a light source which has an envelope of doped quartz glass. The quartz glass including silicon, cerium, titanium, europium and aluminium in oxidic form. Cerium accounts for 0.1-0.2, titanium for 0.01-0.04, europium for 0.03-0.2 and aluminium for at most 0.8 at % of the cationogenous elements. The aluminium/europium atomic ratio lies in the region from 3 to 8. The doped quartz glass is at least substantially transparent to visible radiation and at least substantially impervious to UV radiation.

REFERENCES:
patent: 3531677 (1970-09-01), Loughridge
patent: 4307315 (1981-12-01), Meulemans et al.
patent: 4354139 (1982-10-01), Konijnendijk et al.
patent: 4361779 (1982-11-01), Van Der Steen et al.
patent: 5196759 (1993-03-01), Parham et al.

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