EP0371164A1 - Blitzlampe - Google Patents

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Publication number
EP0371164A1
EP0371164A1 EP88119917A EP88119917A EP0371164A1 EP 0371164 A1 EP0371164 A1 EP 0371164A1 EP 88119917 A EP88119917 A EP 88119917A EP 88119917 A EP88119917 A EP 88119917A EP 0371164 A1 EP0371164 A1 EP 0371164A1
Authority
EP
European Patent Office
Prior art keywords
sintered body
base body
flash lamp
glass tube
depression
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Withdrawn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
EP88119917A
Other languages
German (de)
English (en)
French (fr)
Inventor
Ingo Dipl.-Phys. Dünisch
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.)
Heimann Optoelectronics GmbH
Original Assignee
Heimann GmbH
Heimann Optoelectronics GmbH
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 Heimann GmbH, Heimann Optoelectronics GmbH filed Critical Heimann GmbH
Priority to EP88119917A priority Critical patent/EP0371164A1/de
Priority to JP13676289U priority patent/JPH0641337Y2/ja
Publication of EP0371164A1 publication Critical patent/EP0371164A1/de
Withdrawn legal-status Critical Current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
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
    • H01J61/80—Lamps suitable only for intermittent operation, e.g. flash lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes

Definitions

  • the invention relates to a flash lamp which contains two electrodes in a gas-filled, translucent housing, the cathode being composed of a base body and a sintered body connected thereto.
  • a flash lamp of this type is known in which the sintered body, which serves as an activator, is pressed onto the base body under high pressure and sintered there. It encloses a cone-shaped extension of the base body.
  • a good heat transfer between the sintered body and the base body is achieved, whereby the vaporization of the inner wall of the housing with material evaporated by the arc is reduced, but the arc runs close to the housing wall, so that it can be melted on its inside .
  • the invention has for its object to design a flash lamp of the type mentioned so that with good heat transfer between the base body and the sintered body and little coating on the inside of the housing due to evaporation of the arc in the region of the cathode as far from the inside of the housing it is removed that the danger of melting is eliminated.
  • the sintered body is inserted in a recess on the end face of the base body.
  • the arc is guided at a safe distance from the inside of the housing, in particular when the sintered body is surrounded by an annular edge of the base body.
  • a particularly good heat transfer between the base body and the sintered body is ensured if the bottom of the depression is conical.
  • a base body 2 made of solid tungsten is melted into a glass tube 1 and has a recess 3 on its end face projecting into the interior of the glass tube 1, in which a sintered body 4 made of porous, impregnated tungsten sits as an activator.
  • the base body 2 has an annular edge 5 which projects beyond and surrounds the sintered body 4.
  • the recess 3 is cylindrical, with its bottom being conical.
  • the arc 6 starts from the sintered body 4 and is held in the region of the cathode 2, 4 at a safe distance from the glass tube 1.
  • Appropriate dimensions are as follows: Diameter of the base body 2: 3-8 mm Edge 5 thickness: 0.5-1 mm Distance between the end faces of the edge 5 and the sintered body 4: 0.5 mm
  • the lifespan of the sintered body 4 increases if the distance between the end face of the edge 5 and the sintered body 4 is increased.
  • the smaller the distance the better the ignition. Accordingly, one will look for a favorable compromise for achieving a long service life with reliable ignition, which is within the range of the values given above.

Landscapes

  • Discharge Lamp (AREA)
EP88119917A 1988-11-29 1988-11-29 Blitzlampe Withdrawn EP0371164A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP88119917A EP0371164A1 (de) 1988-11-29 1988-11-29 Blitzlampe
JP13676289U JPH0641337Y2 (ja) 1988-11-29 1989-11-24 フラツシユランプ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88119917A EP0371164A1 (de) 1988-11-29 1988-11-29 Blitzlampe

Publications (1)

Publication Number Publication Date
EP0371164A1 true EP0371164A1 (de) 1990-06-06

Family

ID=8199615

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88119917A Withdrawn EP0371164A1 (de) 1988-11-29 1988-11-29 Blitzlampe

Country Status (2)

Country Link
EP (1) EP0371164A1 (enrdf_load_stackoverflow)
JP (1) JPH0641337Y2 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10039383A1 (de) * 2000-08-11 2002-02-28 Perkinelmer Optoelectronics Blitzlampe und Blitzlampenaufbau

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5652615B2 (ja) * 2011-03-18 2015-01-14 ウシオ電機株式会社 フラッシュランプ

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129609A (en) * 1982-11-02 1984-05-16 Heraeus Gmbh W C Electrodes for laser exciter lamps
EP0282739A1 (de) * 1987-02-27 1988-09-21 Heimann GmbH Blitzlampe

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129609A (en) * 1982-11-02 1984-05-16 Heraeus Gmbh W C Electrodes for laser exciter lamps
EP0282739A1 (de) * 1987-02-27 1988-09-21 Heimann GmbH Blitzlampe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 12, Nr. 111 (E-598)[2958], 8. April 1988; & JP-A-62 241 253 (USHIO INC.) 21-10-1987 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10039383A1 (de) * 2000-08-11 2002-02-28 Perkinelmer Optoelectronics Blitzlampe und Blitzlampenaufbau
US6867547B2 (en) 2000-08-11 2005-03-15 Perkinelmer Optoelectronics Gmbh Flash lamp and flash lamp structure

Also Published As

Publication number Publication date
JPH0279557U (enrdf_load_stackoverflow) 1990-06-19
JPH0641337Y2 (ja) 1994-10-26

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE GB

17P Request for examination filed

Effective date: 19900625

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: HEIMANN OPTOELECTRONICS GMBH

17Q First examination report despatched

Effective date: 19930726

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19931001