Electrodeless low-pressure discharge lamp with plasma channel

Details Electrodeless low-pressure discharge lamp with plasma channel Electrodeless low-pressure discharge lamp with plasma channel

1992-12-30

1994-07-05

Mis, David

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

315326, 313110, 313161, 313612, H05B 4124, H01J 1102

Patent

active

053270495

ABSTRACT:
An electrodeless low pressure discharge lamp, preferably filled with deuterium gas, is provided with a cylindrical envelope made from quartz glass and surrounded by a cylindrical excitation coil driven at between 10 and 800 MHz. Within the lamp envelope, there is provided a cylindrical aperture member made from boron nitride which in a radial direction extends to the inner surface of the envelope and which is provided with an uninterrupted coaxial channel for confining to a small diameter the plasma discharge arc generated during operation of the lamp, the aperture member having an optical axis extending through coaxially with its channel, the radiation emitting in a directed pattern along the optical axis.

REFERENCES:
patent: 4177422 (1979-12-01), Deficis et al.
patent: 4959592 (1990-09-01), Anderson et al.
patent: 5117150 (1992-05-01), Schwarz et al.

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