JPS5255278A - High pressure sodium lamp - Google Patents

High pressure sodium lamp

Info

Publication number
JPS5255278A
JPS5255278A JP50130341A JP13034175A JPS5255278A JP S5255278 A JPS5255278 A JP S5255278A JP 50130341 A JP50130341 A JP 50130341A JP 13034175 A JP13034175 A JP 13034175A JP S5255278 A JPS5255278 A JP S5255278A
Authority
JP
Japan
Prior art keywords
sodium lamp
high pressure
pressure sodium
lamp
ceramics
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
JP50130341A
Other languages
Japanese (ja)
Inventor
Ikuo Iwai
Motonori Masui
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.)
Iwasaki Denki KK
Original Assignee
Iwasaki Denki KK
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 Iwasaki Denki KK filed Critical Iwasaki Denki KK
Priority to JP50130341A priority Critical patent/JPS5255278A/en
Publication of JPS5255278A publication Critical patent/JPS5255278A/en
Pending legal-status Critical Current

Links

Landscapes

  • Compositions Of Oxide Ceramics (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

PURPOSE: To improve luminous efficiency of a lamp, by making 1000 or less a number of crystal particles per surface area (1 mm2) of a polycrystalline ceramics, in a high voltage sodium lamp in which Na, Hg, inert gas etc. is sealed within a luminous tube comprising a transparent polycrystal ceramics.
COPYRIGHT: (C)1977,JPO&Japio
JP50130341A 1975-10-31 1975-10-31 High pressure sodium lamp Pending JPS5255278A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50130341A JPS5255278A (en) 1975-10-31 1975-10-31 High pressure sodium lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50130341A JPS5255278A (en) 1975-10-31 1975-10-31 High pressure sodium lamp

Publications (1)

Publication Number Publication Date
JPS5255278A true JPS5255278A (en) 1977-05-06

Family

ID=15032056

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50130341A Pending JPS5255278A (en) 1975-10-31 1975-10-31 High pressure sodium lamp

Country Status (1)

Country Link
JP (1) JPS5255278A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5477481A (en) * 1977-12-02 1979-06-20 Ngk Insulators Ltd Polycrystal transparent alumina light emitting tube and high voltage vapor discharge lamp using same
US4620131A (en) * 1983-07-25 1986-10-28 U.S. Philips Corporation Lamp with discharge vessel made of densely sintered translucent aluminium oxide
JP2011100717A (en) * 2009-09-09 2011-05-19 Ngk Insulators Ltd Translucent polycrystalline sintered body, method for manufacturing translucent polycrystalline sintered body, and arc tube for high-intensity discharge lamp

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4898684A (en) * 1972-03-27 1973-12-14

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4898684A (en) * 1972-03-27 1973-12-14

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5477481A (en) * 1977-12-02 1979-06-20 Ngk Insulators Ltd Polycrystal transparent alumina light emitting tube and high voltage vapor discharge lamp using same
US4620131A (en) * 1983-07-25 1986-10-28 U.S. Philips Corporation Lamp with discharge vessel made of densely sintered translucent aluminium oxide
JP2011100717A (en) * 2009-09-09 2011-05-19 Ngk Insulators Ltd Translucent polycrystalline sintered body, method for manufacturing translucent polycrystalline sintered body, and arc tube for high-intensity discharge lamp

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