Electric incandescent lamp with a quartz glass lamp vessel and q

Details Electric incandescent lamp with a quartz glass lamp vessel and q Electric incandescent lamp with a quartz glass lamp vessel and q

1994-09-07

1996-06-04

O'Shea, Sandra L.

Electric lamp and discharge devices

With gas or vapor

Incandescent filament lamp

313636, 313493, H01K 132

Patent

active

055236502

ABSTRACT:
The electric incandescent lamp has a quartz glass lamp vessel (1) or envelope (4') around the lamp vessel, which has a red coloured dope in the area at the side of the incandescent body (3). The quartz glass with red dope contains samarium.sup.II oxide, aluminium oxide and silicon dioxide, the analysis of the glass in its oxidised form being Sm.sub.2 O.sub.3 to 1 to 3% by weight, Al.sub.2 O.sub.3 up to 3% by weight, rest SiO.sub.2, the molar ratio Al/Sm being at least 2.

REFERENCES:
patent: 3258631 (1963-01-01), Elmer et al.
patent: 4501799 (1985-02-01), Drissen et al.
patent: 4749902 (1988-06-01), Weiss
patent: 4910431 (1990-03-01), Witt et al.
Rpohkorova et al., "Effect of a third component and the conditions of synthesis on the spectral-luminescence properties of vitreous silica containing rare-earth elements", Soviet Journal of Glass Physics & Chemistry, vol. 13, No. 4, Jul. 1987, New York, pp. 292-297.

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