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Title: Very high efficacy electrodeless high intensity discharge lamps

Abstract

An electrodeless arc lamp comprises an outer jacket hermetically sealing and thermally protecting an arc tube inside which has an upwardly convex bottom center section. The absence of chemically reactive electrode material makes it possible to use metal halides other than iodides. The tube contains chlorides, bromides or a mixture thereof of scandium and sodium in a nearly equimolar relationship in addition to mercury and an inert gas. Good color balance can be obtained at reduced reservoir temperature and with less power loss. Reduction in wall temperature makes it possible to attain longer lamp life.

Inventors:
 [1]
  1. (Schenectady, NY)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
OSTI Identifier:
866421
Patent Number(s):
US 4705987
Assignee:
United States of America as represented by United States (Washington, DC) LBNL
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
efficacy; electrodeless; intensity; discharge; lamps; lamp; comprises; outer; jacket; hermetically; sealing; thermally; protecting; tube; inside; upwardly; convex; bottom; center; section; absence; chemically; reactive; electrode; material; makes; metal; halides; iodides; contains; chlorides; bromides; mixture; scandium; sodium; nearly; equimolar; relationship; addition; mercury; inert; gas; color; balance; obtained; reduced; reservoir; temperature; power; loss; reduction; wall; attain; life; center section; hermetically sealing; outer jacket; chemically react; power loss; intensity discharge; metal halides; active electrode; discharge lamp; inert gas; metal halide; electrode material; wall temperature; chemically reactive; lamp comprises; upwardly convex; thermally protecting; hermetically seal; discharge lamps; /313/

Citation Formats

Johnson, Peter D. Very high efficacy electrodeless high intensity discharge lamps. United States: N. p., 1987. Web.
Johnson, Peter D. Very high efficacy electrodeless high intensity discharge lamps. United States.
Johnson, Peter D. Thu . "Very high efficacy electrodeless high intensity discharge lamps". United States. https://www.osti.gov/servlets/purl/866421.
@article{osti_866421,
title = {Very high efficacy electrodeless high intensity discharge lamps},
author = {Johnson, Peter D.},
abstractNote = {An electrodeless arc lamp comprises an outer jacket hermetically sealing and thermally protecting an arc tube inside which has an upwardly convex bottom center section. The absence of chemically reactive electrode material makes it possible to use metal halides other than iodides. The tube contains chlorides, bromides or a mixture thereof of scandium and sodium in a nearly equimolar relationship in addition to mercury and an inert gas. Good color balance can be obtained at reduced reservoir temperature and with less power loss. Reduction in wall temperature makes it possible to attain longer lamp life.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1987},
month = {Thu Jan 01 00:00:00 EST 1987}
}

Patent:

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