JPS5598451A - Metal halide lamp - Google Patents

Metal halide lamp

Info

Publication number
JPS5598451A
JPS5598451A JP679979A JP679979A JPS5598451A JP S5598451 A JPS5598451 A JP S5598451A JP 679979 A JP679979 A JP 679979A JP 679979 A JP679979 A JP 679979A JP S5598451 A JPS5598451 A JP S5598451A
Authority
JP
Japan
Prior art keywords
electrode
substance
less
lamp
luminous flux
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
JP679979A
Other languages
Japanese (ja)
Inventor
Keiji Watabe
Masato Saito
Keiji Fukuyama
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 JP679979A priority Critical patent/JPS5598451A/en
Publication of JPS5598451A publication Critical patent/JPS5598451A/en
Pending legal-status Critical Current

Links

Landscapes

  • Discharge Lamp (AREA)

Abstract

PURPOSE: To obtain a lamp which has less rise in starting voltage and less deterioration in luminous flux as well as to improve adhesion of radioactive substance to the electrode constituting material by using electrode having electron irradiating substance which contains thorium oxide, lanthanum oxide.
CONSTITUTION: Electron irradiating substance 21 which contains thorium oxide and lanthanum oxide is coated on electrode core wires 18 composed of heat resistive metal, such as tungsten, etc. and the surfaces of internal coil 19 and external coil 20 convolved around the electrode core wires, which is tightly fixed under hot heat. Use of this electrode inside the light emitting tube improves remarkably adhesion of electron irradiating substance to the electrode constituting material, and offers a lamp with long life which has no occurrence of peeling off irradiating substance, less starting voltage and less deterioration in luminous flux.
COPYRIGHT: (C)1980,JPO&Japio
JP679979A 1979-01-23 1979-01-23 Metal halide lamp Pending JPS5598451A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP679979A JPS5598451A (en) 1979-01-23 1979-01-23 Metal halide lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP679979A JPS5598451A (en) 1979-01-23 1979-01-23 Metal halide lamp

Publications (1)

Publication Number Publication Date
JPS5598451A true JPS5598451A (en) 1980-07-26

Family

ID=11648218

Family Applications (1)

Application Number Title Priority Date Filing Date
JP679979A Pending JPS5598451A (en) 1979-01-23 1979-01-23 Metal halide lamp

Country Status (1)

Country Link
JP (1) JPS5598451A (en)

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