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Title: Lamp method and apparatus using multiple reflections

Abstract

An electrodeless microwave discharge lamp includes 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, and a reflector disposed within the microwave cavity 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.

Inventors:
 [1];  [2]
  1. (Gaithersburg, MD)
  2. (Damascus, MD)
Issue Date:
Research Org.:
Fusion Lighting, Inc., Rockville, MD (United States)
OSTI Identifier:
873783
Patent Number(s):
6246160
Assignee:
Fusion Lighting, Inc. (Rockville, MD) HQPR
DOE Contract Number:  
FG01-95EE23796
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
lamp; method; apparatus; multiple; reflections; electrodeless; microwave; discharge; envelope; forming; fill; disposed; therein; emits; light; capable; absorbing; wavelength; re-emitting; absorbed; emitted; spectral; power; distribution; absence; reflection; source; energy; coupled; excite; emit; reflector; cavity; configured; reflect; allowing; exit; exiting; proportionately; visible; region; compared; re-emitted; shifted; respect; magnitude; shift; relation; effective; optical; path; length; microwave discharge; emits light; multiple reflections; discharge lamp; path length; microwave energy; optical path; disposed therein; microwave cavity; light emitted; power distribution; wave energy; absorbing light; emit light; energy coupled; visible region; multiple reflection; wave cavity; lamp method; absorbed light; /313/

Citation Formats

MacLennan, Donald A., and Turner, Brian P. Lamp method and apparatus using multiple reflections. United States: N. p., 2001. Web.
MacLennan, Donald A., & Turner, Brian P. Lamp method and apparatus using multiple reflections. United States.
MacLennan, Donald A., and Turner, Brian P. Mon . "Lamp method and apparatus using multiple reflections". United States. https://www.osti.gov/servlets/purl/873783.
@article{osti_873783,
title = {Lamp method and apparatus using multiple reflections},
author = {MacLennan, Donald A. and Turner, Brian P.},
abstractNote = {An electrodeless microwave discharge lamp includes 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, and a reflector disposed within the microwave cavity 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {1}
}

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