EP0325157A1 - Lampe à décharge dans le gaz - Google Patents

Lampe à décharge dans le gaz Download PDF

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Publication number
EP0325157A1
EP0325157A1 EP89100424A EP89100424A EP0325157A1 EP 0325157 A1 EP0325157 A1 EP 0325157A1 EP 89100424 A EP89100424 A EP 89100424A EP 89100424 A EP89100424 A EP 89100424A EP 0325157 A1 EP0325157 A1 EP 0325157A1
Authority
EP
European Patent Office
Prior art keywords
glass tube
gas discharge
discharge lamp
less
diameter
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.)
Granted
Application number
EP89100424A
Other languages
German (de)
English (en)
Other versions
EP0325157B1 (fr
Inventor
Ingo Dipl.-Phys. Dünisch
Rudolf Zartner
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 GmbH
Original Assignee
Heimann 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 filed Critical Heimann GmbH
Publication of EP0325157A1 publication Critical patent/EP0325157A1/fr
Application granted granted Critical
Publication of EP0325157B1 publication Critical patent/EP0325157B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting

Definitions

  • the invention relates to a gas discharge lamp, in particular a flash tube.
  • flash tubes are required that emit less light than conventional flash tubes intended for exposing a film, but have a constant light output for a few milliseconds. They must therefore have a high internal resistance.
  • a high internal resistance can be achieved through a long burning length, a small internal diameter and a high filling pressure.
  • a long focal length is not an option with an "electronic still camera” due to the installation dimensions.
  • a high filling pressure is ruled out because of the ignition problem.
  • the invention is therefore based on the object to provide a gas discharge lamp which is particularly suitable for an "electronic still camera” by reducing the inner diameter and other design measures.
  • the measures described allow miniaturization of the gas discharge lamp and thus installation in a very small camera.
  • a further development of the invention consists in that a series ignition circuit with an ignition transformer and an ignition capacitor is provided, in which the ignition capacitor is preferably blocked by a diode. This circuit allows miniaturization of the electronic components.
  • the gas discharge lamp shown in FIG. 1 has a glass tube 1, at the ends of which electrodes 2 are fused.
  • the inner diameter of the glass tube 1 is less than 2 mm, preferably less than 1 mm.
  • Tinnable plates 3 are attached to the outside of the electrodes 2, the diameter of which is smaller than or equal to the diameter of the glass tube 1 and which carry a soft solder layer 4 for soldering on the connecting wire.
  • the thickness of the glass tube wall is less than 0.5 mm, preferably less than 0.3 mm.
  • the glass tube 1 consists of a material that can withstand higher loads than the glass usually used for flash tubes (tungsten melting glass). For example, Quartz glass or pyrex glass
  • Molybdenum foils for igniting the lamp can be melted in the glass tube 1.
  • the ignition circuit according to FIG. 2 shows a flash lamp 5 according to FIG. 1, via which a flash capacitor C1 discharges via a diode 6.
  • the tube 5 is ignited by an ignition transformer 7 via a capacitor C2.
  • the circuit according to FIG. 2 is a series ignition with blocking by the diode 6 in the main discharge circuit.
  • FIG. 3 again shows the flash lamp 5 in connection with an ignition transformer 7a and a flash capacitor C1a.
  • This circuit is a classic series ignition.
  • FIG. 4 also shows a transparent ignition layer 9 on the glass tube 1a.
  • the flanges 8 can be formed from the glass of the glass tube 1a but also from separate plastic rings.

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamp (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
EP89100424A 1988-01-20 1989-01-11 Lampe à décharge dans le gaz Expired - Lifetime EP0325157B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8800632U 1988-01-20
DE8800632U DE8800632U1 (de) 1988-01-20 1988-01-20 Gasentladungslampe

Publications (2)

Publication Number Publication Date
EP0325157A1 true EP0325157A1 (fr) 1989-07-26
EP0325157B1 EP0325157B1 (fr) 1991-10-23

Family

ID=6819759

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89100424A Expired - Lifetime EP0325157B1 (fr) 1988-01-20 1989-01-11 Lampe à décharge dans le gaz

Country Status (4)

Country Link
EP (1) EP0325157B1 (fr)
JP (1) JPH01176360U (fr)
KR (1) KR890012352A (fr)
DE (2) DE8800632U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0924747A2 (fr) * 1997-12-16 1999-06-23 Fuji Photo Film Co., Ltd. Tube à décharge éclair et son procédé de fabrication

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB435527A (en) * 1933-12-19 1935-09-23 British Thomson Houston Co Ltd Improvements in and relating to electric lamps or the like
EP0031556A1 (fr) * 1979-12-27 1981-07-08 COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT-ALCATEL S.A. dite: Source d'éclairage pour analyse ligne par ligne d'un document
DE8390086U1 (de) * 1983-08-12 1985-11-21 Heimann Gmbh, 6200 Wiesbaden Wandstabilisierte Infrarot-Blitzröhre

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB435527A (en) * 1933-12-19 1935-09-23 British Thomson Houston Co Ltd Improvements in and relating to electric lamps or the like
EP0031556A1 (fr) * 1979-12-27 1981-07-08 COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT-ALCATEL S.A. dite: Source d'éclairage pour analyse ligne par ligne d'un document
DE8390086U1 (de) * 1983-08-12 1985-11-21 Heimann Gmbh, 6200 Wiesbaden Wandstabilisierte Infrarot-Blitzröhre

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
LIGHT & LIGHTING, Band 63, Nr. 6, Juni 1970, Seiten 146-151; E.J.G. BEESON et al.: "New metal halide discharge lamps and their uses" *
PATENT ABSTRACTS OF JAPAN, Band 8, Nr. 194 (E-264)[1631], 6. September 1984, Seite 34 E 264; & JP-A-59 81 855 (FUJI SHASHIN FILM K.K.) 11-05-1984 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0924747A2 (fr) * 1997-12-16 1999-06-23 Fuji Photo Film Co., Ltd. Tube à décharge éclair et son procédé de fabrication
EP0924747A3 (fr) * 1997-12-16 2000-01-12 Fuji Photo Film Co., Ltd. Tube à décharge éclair et son procédé de fabrication

Also Published As

Publication number Publication date
EP0325157B1 (fr) 1991-10-23
DE58900384D1 (de) 1991-11-28
JPH01176360U (fr) 1989-12-15
KR890012352A (ko) 1989-08-25
DE8800632U1 (de) 1989-05-18

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