EP0344433A2 - Lampe à décharge à haute pression à sodium - Google Patents

Lampe à décharge à haute pression à sodium Download PDF

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Publication number
EP0344433A2
EP0344433A2 EP89106274A EP89106274A EP0344433A2 EP 0344433 A2 EP0344433 A2 EP 0344433A2 EP 89106274 A EP89106274 A EP 89106274A EP 89106274 A EP89106274 A EP 89106274A EP 0344433 A2 EP0344433 A2 EP 0344433A2
Authority
EP
European Patent Office
Prior art keywords
pressure sodium
discharge lamp
coating
discharge vessel
sodium discharge
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.)
Withdrawn
Application number
EP89106274A
Other languages
German (de)
English (en)
Other versions
EP0344433A3 (fr
Inventor
Axel Bund
Dieter Dr. Schmidt
Helmut Weske
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0344433A2 publication Critical patent/EP0344433A2/fr
Publication of EP0344433A3 publication Critical patent/EP0344433A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
    • H01J61/523—Heating or cooling particular parts of the lamp

Definitions

  • the invention relates to a high pressure sodium discharge lamp with the features designated in the preamble of the main claim.
  • the invention is particularly suitable for low-power discharge vessels (below 150 W) and for color-improved sodium high-pressure discharge lamps.
  • the single figure shows one end of a discharge vessel 1 of a high-pressure sodium discharge lamp of 250 watts.
  • the discharge vessel 1 consists of a cylindrical tubular part 2 made of aluminum oxide ceramic with a diameter of approximately 9.4 mm, in the end of which a bushing 3, also made of aluminum oxide ceramic, is sintered in a gas-tight manner.
  • a tubular power supply 4 made of niobium is soldered into the central opening of the socket 3 in a gas-tight manner by means of a suitable glass solder (not shown).
  • an electrode 5 is fastened, for. B. by means of a weld. So far, the structure of the discharge vessel 1 is conventional and manufactured in a manner known to the person skilled in the art.
  • the object of the invention is to design the heat accumulation means at the ends of the discharge vessel in such a way that they are easy to connect to the discharge vessel, cannot change their position relative to the discharge vessel and thus lead to reproducible measurement results with regard to the electrical and lighting data.
  • the lamp assembly should be simplified.
  • the coating is preferably evaporated in vacuo onto the ends of the discharge vessel, the parts of which it is not to be coated either being arranged outside the vacuum chamber or being covered.
  • the coating can also be applied as a paste to the ends of the discharge vessel, the resistant metal particles being dissolved in the paste and after the paste has hardened, this remains as a non-releasable coating on the relevant areas of the discharge vessel.
  • the end of the tubular part 2 is provided with a coating 6 made of nickel about its length over the length of the electrode space, which is applied to this desired part of the discharge vessel, for example by evaporation, the part of the tubular part 2 which is not to be steamed and the end face of the discharge vessel 1 are covered during the evaporation process.
  • the thickness of the layer is approx. 30 ⁇ m.
  • the coating is thus non-detachably connected to the tubular part 2 made of ceramic and brings about the advantages stated above. Instead of nickel, chrome or another resistant metal with comparable properties can also be used.
  • the color rendering index that can be achieved with such a coating is, depending on the type of coating and depending on the lamp type, between Ra approx. 65 and Ra approx. 80.
  • the corresponding values for a high-pressure sodium discharge lamp not provided with this coating according to the invention are Ra approx. 20.
  • the coating achievable temperature increase within the discharge vessel 1 is approximately 100 ° C.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
  • Discharge Lamp (AREA)
EP89106274A 1988-05-31 1989-04-10 Lampe à décharge à haute pression à sodium Withdrawn EP0344433A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8807104U DE8807104U1 (de) 1988-05-31 1988-05-31 Natriumhochdruckentladungslampe
DE8807104U 1988-05-31

Publications (2)

Publication Number Publication Date
EP0344433A2 true EP0344433A2 (fr) 1989-12-06
EP0344433A3 EP0344433A3 (fr) 1990-03-28

Family

ID=6824574

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89106274A Withdrawn EP0344433A3 (fr) 1988-05-31 1989-04-10 Lampe à décharge à haute pression à sodium

Country Status (3)

Country Link
EP (1) EP0344433A3 (fr)
JP (1) JPH0222560U (fr)
DE (1) DE8807104U1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0592040A1 (fr) * 1992-10-08 1994-04-13 Koninklijke Philips Electronics N.V. Lampe à décharge à haute pression
EP0642643A4 (fr) * 1992-05-29 1995-08-09 Anthony S Mfg Co Element isolant pour lampe fluorescente.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10233704A1 (de) * 2002-07-24 2004-02-12 Heraeus Noblelight Gmbh Entladungslampe mit einem rohrförmigen, transparenten Entladungsgefäß sowie deren Verwendung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3974410A (en) * 1975-04-04 1976-08-10 General Electric Company Alumina ceramic lamp having enhanced heat conduction to the amalgam pool
US4001634A (en) * 1975-09-02 1977-01-04 General Electric Company Discharge lamp having thermal switch starter
DE2619674C2 (de) * 1976-05-04 1986-05-07 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Halogen-Metalldampfentladungslampe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0642643A4 (fr) * 1992-05-29 1995-08-09 Anthony S Mfg Co Element isolant pour lampe fluorescente.
EP0592040A1 (fr) * 1992-10-08 1994-04-13 Koninklijke Philips Electronics N.V. Lampe à décharge à haute pression
US5541480A (en) * 1992-10-08 1996-07-30 U.S. Philips Corporation High-pressure discharge lamp with metal layer on outer surface

Also Published As

Publication number Publication date
EP0344433A3 (fr) 1990-03-28
JPH0222560U (fr) 1990-02-15
DE8807104U1 (de) 1988-07-14

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