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US 4,063,132 AGranted
DC powered microwave discharge in an electrodeless light source
AssigneeGTE Laboratories Incorporated
InventorsJoseph M. Proud, Richard A. Bessett, William H. McNeill
Life of this patent
Estimating the term…
Abstract
A half wavelength resonant cavity having inner and outer coaxial conductors is coupled at one end to a dc power source, and a gas discharge electrodeless lamp is disposed in the region between the conductors at the other end of the cavity. Repetitive bursts of radio frequency oscillations occur within the cavity, the oscillations causing breakdown of the fill material within the lamp to produce light.
Claims6
A light source comprising:
- a. a low frequency power source,
- b. a resonant device having an inner conductor and an outer conductor disposed around the inner conductor, the conductors having first ends coupled to the power source,
- c. an electrodeless lamp having an envelope made of a light-transmitting material and a fill material which emits light upon breakdown and excitation, the lamp being disposed at a second end of the conductors in the region therebetween, the fill material, in response to a low frequency electrical field build-up to a predetermined level, breaking down to produce repetitive exponentially damped bursts of radio frequency oscillations of current within the fill material to produce light, and
- d. means external to the device for rapidly charging the resonant device.
1 more element
Dependencies are inferred from the claim text.