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Title: Discharge lamp with reflective jacket

Abstract

A discharge lamp includes an envelope, a fill which emits light when excited disposed in the envelope, a source of excitation power coupled to the fill to excite the fill and cause the fill to emit light, and a reflector disposed around the envelope and defining an opening, the reflector being configured to reflect some of the light emitted by the fill back into the fill while allowing some light to exit through the opening. The reflector may be made from a material having a similar thermal index of expansion as compared to the envelope and which is closely spaced to the envelope. The envelope material may be quartz and the reflector material may be either silica or alumina. The reflector may be formed as a jacket having a rigid structure which does not adhere to the envelope. The lamp may further include an optical clement spaced from the envelope and configured to reflect an unwanted component of light which exited the envelope back into the envelope through the opening in the reflector. Light which can be beneficially recaptured includes selected wavelength regions, a selected polarization, and selected angular components.

Inventors:
 [1];  [2];  [1]
  1. Gaithersburg, MD
  2. Damascus, MD
Issue Date:
Research Org.:
Fusion Lighting, Inc., Rockville, MD (United States)
OSTI Identifier:
874009
Patent Number(s):
6291936
Assignee:
Fusion Lighting, Inc. (Rockville, MD)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
DOE Contract Number:  
FG01-95EE23796
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
discharge; lamp; reflective; jacket; envelope; fill; emits; light; excited; disposed; source; excitation; power; coupled; excite; emit; reflector; defining; configured; reflect; emitted; allowing; exit; material; similar; thermal; index; expansion; compared; closely; spaced; quartz; silica; alumina; formed; rigid; structure; adhere; optical; clement; unwanted; component; exited; beneficially; recaptured; selected; wavelength; regions; polarization; angular; components; wavelength region; emits light; selected wavelength; discharge lamp; closely spaced; light emitted; rigid structure; emit light; selected wave; /315/

Citation Formats

MacLennan, Donald A, Turner, Brian P, and Kipling, Kent. Discharge lamp with reflective jacket. United States: N. p., 2001. Web.
MacLennan, Donald A, Turner, Brian P, & Kipling, Kent. Discharge lamp with reflective jacket. United States.
MacLennan, Donald A, Turner, Brian P, and Kipling, Kent. Mon . "Discharge lamp with reflective jacket". United States. https://www.osti.gov/servlets/purl/874009.
@article{osti_874009,
title = {Discharge lamp with reflective jacket},
author = {MacLennan, Donald A and Turner, Brian P and Kipling, Kent},
abstractNote = {A discharge lamp includes an envelope, a fill which emits light when excited disposed in the envelope, a source of excitation power coupled to the fill to excite the fill and cause the fill to emit light, and a reflector disposed around the envelope and defining an opening, the reflector being configured to reflect some of the light emitted by the fill back into the fill while allowing some light to exit through the opening. The reflector may be made from a material having a similar thermal index of expansion as compared to the envelope and which is closely spaced to the envelope. The envelope material may be quartz and the reflector material may be either silica or alumina. The reflector may be formed as a jacket having a rigid structure which does not adhere to the envelope. The lamp may further include an optical clement spaced from the envelope and configured to reflect an unwanted component of light which exited the envelope back into the envelope through the opening in the reflector. Light which can be beneficially recaptured includes selected wavelength regions, a selected polarization, and selected angular components.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {1}
}