Electric lamp and discharge devices – With gas or vapor – Three or more electrode discharge device
Patent
1988-03-30
1990-03-20
Yusko, Donald J.
Electric lamp and discharge devices
With gas or vapor
Three or more electrode discharge device
313112, 313117, 313573, 313635, 313636, 313637, H01J 1748, H01J 1716
Patent
active
049104314
ABSTRACT:
To protect the quartz of a quartz glass bulb (2) from attack by alkaline earth oxides emitted from electrodes (6) of the lamp, and prevent deterioration of the quartz in use of the lamp with respect to transmission of ultraviolet (UV) radiation, particularly in the short wave length range of 200 nm to 250 nm, boron silicate glass or glass-like aluminum oxide, or a mixture of boron silicate glass and glass-like aluminum oxide is interposed between the quartz bulb (2) and the electrodes. Boron oxide can be applied to the interior of the quartz bulb, and fired thereon to form, for example, a boron silicate glass layer (4) or diffuse into the quartz glass to form a diffusion layer (4') by suitable selection of firing temperatures. Alternatively, an aperture support element (35, 45) can retain a disk of boron silicate glass or glass-like aluminum oxide positioned between the electrodes and the quartz glass bulb. Such disk elements may be planar or of lensetic shape, positioned transverse to the radiation beam axis (10, 310) or at an angle thereto, to provide for partial transmission and reflection, for example in a dual-beam control or measuring system.
REFERENCES:
patent: 1968822 (1934-08-01), Gaidies et al.
patent: 2463743 (1949-03-01), Cary et al.
patent: 3956655 (1976-05-01), Pevo
patent: 4016445 (1977-04-01), Cassidy et al.
patent: 4281274 (1981-07-01), Bechard et al.
Chemical Abstracts, vol. 71, 1969, S. 354, "Low Pressure Mercury Discharge Lamps", N. V. Philips, Abstract-Nr. 34526g.
Chemical Abstracts, Bd. 71, Nr. 5, 4 Aug. 1969.
Kremmling Horst
Lochmann Helmut
Schwarz Werner
Thomas Gunter
Witt Jurgen
Horabik Michael
W. C. Heraeus GmbH
Yusko Donald J.
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