JPS5665454A - High-pressure metal vapor discharge lamp - Google Patents

High-pressure metal vapor discharge lamp

Info

Publication number
JPS5665454A
JPS5665454A JP14087479A JP14087479A JPS5665454A JP S5665454 A JPS5665454 A JP S5665454A JP 14087479 A JP14087479 A JP 14087479A JP 14087479 A JP14087479 A JP 14087479A JP S5665454 A JPS5665454 A JP S5665454A
Authority
JP
Japan
Prior art keywords
luminous flux
tube
emission
phosphor
discharge lamp
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP14087479A
Other languages
Japanese (ja)
Inventor
Hiroshi Ito
Katsuo Murakami
Shoji Origasa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP14087479A priority Critical patent/JPS5665454A/en
Publication of JPS5665454A publication Critical patent/JPS5665454A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

PURPOSE:To minimize the deterioration of the luminous flux of a high-pressure metal discharge lamp which may be caused in the first stage of lighting, and enable a high luminous flux to be maintained until the end of the life of the lamp by charging an outer tube containing an emission tube, the inner wall of which is covered with a luminescent material, with oxygen at one less than a given pressure. CONSTITUTION:A space 7 of an outer tube 1 which contains an emission tube 3, the inner wall of which is covered with a phosphor 2, is charged with oxygen at a pressure of not less than 0.01 Torr in addition to an inert gas such as nitrogen which is usually used. As a result, the deposition and precipitation of carbon on the phosphor layer 2, which might be caused by ultraviolet rays and heat that are emitted from the emission tube 3 and which might result from any remaining gases which are produced during the phosphor layer 2 and a metal frame wire 4 which supports the tube 3, can be prevented. Consequently, the emission from the phosphor is not obstructed, the deterioration of the luminous flux in the first stage of lighting can be minimized, and a high luminous flux can be maintained.
JP14087479A 1979-10-31 1979-10-31 High-pressure metal vapor discharge lamp Pending JPS5665454A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14087479A JPS5665454A (en) 1979-10-31 1979-10-31 High-pressure metal vapor discharge lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14087479A JPS5665454A (en) 1979-10-31 1979-10-31 High-pressure metal vapor discharge lamp

Publications (1)

Publication Number Publication Date
JPS5665454A true JPS5665454A (en) 1981-06-03

Family

ID=15278761

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14087479A Pending JPS5665454A (en) 1979-10-31 1979-10-31 High-pressure metal vapor discharge lamp

Country Status (1)

Country Link
JP (1) JPS5665454A (en)

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