JPS5740857A - Metal halide lamp - Google Patents

Metal halide lamp

Info

Publication number
JPS5740857A
JPS5740857A JP11540580A JP11540580A JPS5740857A JP S5740857 A JPS5740857 A JP S5740857A JP 11540580 A JP11540580 A JP 11540580A JP 11540580 A JP11540580 A JP 11540580A JP S5740857 A JPS5740857 A JP S5740857A
Authority
JP
Japan
Prior art keywords
lighting
life
electrode axis
during
suppression
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
JP11540580A
Other languages
Japanese (ja)
Inventor
Yasuki Mori
Akihiro Kamiya
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11540580A priority Critical patent/JPS5740857A/en
Publication of JPS5740857A publication Critical patent/JPS5740857A/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
    • H01J61/84—Lamps with discharge constricted by high pressure
    • H01J61/88—Lamps with discharge constricted by high pressure with discharge additionally constricted by envelope

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

PURPOSE:To prevent any suppression of the lighting, as well as any decrease of the light-flux maintenance rate which might be caused during the life by restricting the relationship between the diameter of an electrode axis, and the discharge current during stable lighting to be in a given range, and thereby reducing the wave hight of the restrike voltage. CONSTITUTION:One of main electrodes 3a and 3b is prepared by coilig an electrode coil 10 made of a high-melting-point metal such as tungsten around an electrode axis 9 made of the same material as the coil 10 in one or plural layers. An emission tube 1 is charged with given amounts of mercury, a metal halide and a starting rare gas. The diameter (d) of the electrode axis 9, and a discharge current IL during stable lighting are restricted to satisfy the relationship, 3.0<=IL<1/2>/d<=6.1. Consequently, any suppression of the lighting can be prevented, the light-flux maintenance rate during the life can be maintained high, and a lamp of increased life can be obtained.
JP11540580A 1980-08-22 1980-08-22 Metal halide lamp Pending JPS5740857A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11540580A JPS5740857A (en) 1980-08-22 1980-08-22 Metal halide lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11540580A JPS5740857A (en) 1980-08-22 1980-08-22 Metal halide lamp

Publications (1)

Publication Number Publication Date
JPS5740857A true JPS5740857A (en) 1982-03-06

Family

ID=14661749

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11540580A Pending JPS5740857A (en) 1980-08-22 1980-08-22 Metal halide lamp

Country Status (1)

Country Link
JP (1) JPS5740857A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS604562A (en) * 1983-06-23 1985-01-11 Mitsubishi Gas Chem Co Inc Solderable electrically conductive composition

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4939072A (en) * 1972-08-24 1974-04-11
JPS4942074U (en) * 1972-07-21 1974-04-13

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4942074U (en) * 1972-07-21 1974-04-13
JPS4939072A (en) * 1972-08-24 1974-04-11

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS604562A (en) * 1983-06-23 1985-01-11 Mitsubishi Gas Chem Co Inc Solderable electrically conductive composition

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