Launcher suitable for exciting surface waves in a discharge tube

Details Launcher suitable for exciting surface waves in a discharge tube Launcher suitable for exciting surface waves in a discharge tube

1989-09-01

1991-11-12

Laroche, Eugene R.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

315344, 313607, H05B 4124

Patent

active

050650750

ABSTRACT:
A discharge tube arrangement for use as a light source includes a discharge tube made of a light-transmissive dielectric material and containing a fill. An excitation device for exciting surface waves in the discharge tube comprises an r.f. power generator and a launcher. The launcher is formed as an inner tube, an outer tube coaxial with the inner tube and first and second end walls, at least one of the first and second end walls having an aperture for receiving the discharge tube. A launcher gap extends axially from a first end of the inner tube and there is also a further gap. The outer tube and the first and second end walls form an unbroken electrically conductive path to provide an r.f. screening structure around the inner tube.

REFERENCES:
patent: 4049940 (1977-09-01), Moisan
patent: 4473736 (1984-09-01), Blotet
patent: 4715054 (1987-12-01), Kato
patent: 4792725 (1988-12-01), Levy
patent: 4906898 (1990-03-01), Moisan

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