Patent ID: 6246160
Filing Date: 2001-06-12
Classification: H01J

Abstract:
An electrodeless microwave discharge lamp, comprising:an envelope with a discharge forming fill disposed therein which emits light, the fill being capable of absorbing light at one wavelength and re-emitting the absorbed light at a different wavelength, the light emitted from the fill having a first spectral power distribution in the absence of reflection of light back into the fill;a source of microwave energy coupled to the fill to excite the fill and cause the fill to emit light; anda reflector disposed around the envelope and configured to reflect at least some of the light emitted by the fill back into the fill while allowing some light to exit, the exiting light having a second spectral power distribution with proportionately more light in the visible region as compared to the first spectral power distribution, wherein the light re-emitted by the fill is shifted in wavelength with respect to the absorbed light and the magnitude of the shift is in relation to an effective optical path length.