EP0278302A1 - Lampe-éclair - Google Patents

Lampe-éclair Download PDF

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Publication number
EP0278302A1
EP0278302A1 EP88101036A EP88101036A EP0278302A1 EP 0278302 A1 EP0278302 A1 EP 0278302A1 EP 88101036 A EP88101036 A EP 88101036A EP 88101036 A EP88101036 A EP 88101036A EP 0278302 A1 EP0278302 A1 EP 0278302A1
Authority
EP
European Patent Office
Prior art keywords
electrodes
flash lamp
electrode
discharge space
melted
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.)
Ceased
Application number
EP88101036A
Other languages
German (de)
English (en)
Inventor
Ingo Dipl.-Phys. Dünisch
Dieter Eierle-Tschirner
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 EP0278302A1 publication Critical patent/EP0278302A1/fr
Ceased 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
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/10—Shields, screens, or guides for influencing the discharge
    • H01J61/103—Shields, screens or guides arranged to extend the discharge path

Definitions

  • the invention relates to a flash lamp with a housing in which two electrodes are melted, which protrude into a discharge space.
  • the flash lamp can be bent into a ring to achieve high luminance levels.
  • a ring that is as narrow as possible and as closed as possible is ideal, both from the point of view of symmetry and from the imaging properties in the assigned reflector.
  • the bending radius of a glass tube can be made relatively small, but the discharge arc running in the tube places the greatest stress on the tube wall on the inside of the curve. The stress increases with the reduction of the bending radius and can lead to glass evaporation.
  • the invention is accordingly based on the object of designing a flash lamp of the type mentioned at the outset in such a way that, when the discharge space is as narrow and strongly curved as possible, overuse at the strongly curved points is avoided.
  • the discharge space between the two electrodes is annular and that the outer walls are made of glass and the inner walls are made of white ceramic material which is hermetically fused to the glass. Ceramic material withstands the hot arc much better than glass, so that the discharge space can be bent very much.
  • FIG. 1 shows a flash lamp with a housing having an outer wall 1, which is closed by an upper part 2 and a lower part 3.
  • an electrode 4 is melted in the center and a second electrode 5 is eccentrically melted.
  • a ceramic partition 7, which surrounds the electrode 4 and leaves an opening 6, and which is fused to the outer wall 1 with an extension 8.
  • the electrode 5 lies between the outer wall 1 and the ceramic partition 4.
  • the ceramic partition 4 consists of white ceramic material, which reflects the light radiation arising in the annular discharge space 9 well to the outside. It is hermetically fused to the glass parts and forces the discharge to make an annular detour and to pass through the opening 6 to the electrode 5 forming the cathode.
  • FIG. 3 again has an outer wall 1 which, like components 1, 2, 3 in the example according to FIGS. 1 and 2, is made of glass.
  • the outer wall 1 forming a hollow cylinder is covered above and below, as in the example according to FIGS. 1 and 2.
  • two electrodes 10, 11 are melted eccentrically, which are partially enclosed by shoulders 12a of an approximately T-shaped ceramic partition 12 made of white ceramic material.
  • the middle approach 13 of the Kera Miktrennwand 12 is guided to the outer wall 1 and hermetically fused with this.
  • the arc is also forced in this example to take an annular course from the electrode 11 forming the anode to the electrode 10 forming the cathode in the annular discharge space 14.
  • Two openings 15 allow the discharge to pass through.
  • the embodiment according to FIG. 4 differs from the embodiment according to FIG. 3 in that conductor pieces 18, 19 lead from the electrodes 16, 17 into the annular discharge space 20, the space immediately adjacent to the electrodes 16, 17 being closed off by a white ceramic partition wall 21 , which rests on the conductor pieces 18, 19 with two legs 22 and is fused to the outer wall 1 again with a middle shoulder 20.
  • a hollow cylindrical outer wall 1 made of glass is again provided, which is hermetically sealed by an upper part 23, which is also made of glass, and a lower part 24, which is made of glass.
  • an electrode 25 forming the anode and in the lower part 24, an electrode 26 forming the cathode are melted centrally.
  • the H-shaped ceramic separating part 27 made of white ceramic material which is hermetically fused to the upper part 23 and the lower part 24 and has openings for the formation of the annular discharge space 28 as a plasma channel. 4 one of these openings is visible and designated 29. A corresponding opening is located in the area of the electrode 26.
  • the flash lamp according to FIGS. 5 and 6 is particularly compact since the interior of the core is used by the electrodes 25, 26.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
EP88101036A 1987-02-06 1988-01-25 Lampe-éclair Ceased EP0278302A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3703690 1987-02-06
DE3703690 1987-02-06

Publications (1)

Publication Number Publication Date
EP0278302A1 true EP0278302A1 (fr) 1988-08-17

Family

ID=6320419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88101036A Ceased EP0278302A1 (fr) 1987-02-06 1988-01-25 Lampe-éclair

Country Status (3)

Country Link
US (1) US4896072A (fr)
EP (1) EP0278302A1 (fr)
JP (1) JPS63129955U (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2255431A (en) * 1939-10-21 1941-09-09 Westinghouse Electric & Mfg Co Molded fluorescent lamp
US2465123A (en) * 1946-08-09 1949-03-22 Gen Electric Molded discharge lamp
US3671796A (en) * 1971-01-27 1972-06-20 Us Navy Plasma arc flash source

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2254431A (en) * 1940-05-22 1941-09-02 Levine Samuel Marcus Medicine cabinet
US3651366A (en) * 1969-05-28 1972-03-21 Giannini Inst Flash tube apparatus
JPS5776745A (en) * 1980-10-30 1982-05-13 Matsushita Electric Works Ltd Discharge lamp unit
JPS57118359A (en) * 1981-01-14 1982-07-23 Mitsubishi Electric Corp Planar fluorescent lamp

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2255431A (en) * 1939-10-21 1941-09-09 Westinghouse Electric & Mfg Co Molded fluorescent lamp
US2465123A (en) * 1946-08-09 1949-03-22 Gen Electric Molded discharge lamp
US3671796A (en) * 1971-01-27 1972-06-20 Us Navy Plasma arc flash source

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 6, Nr. 215 (E-138)[1093], 28. Oktober 1982; & JP-A-57 118 359 (MITSUBISHI DENKI K.K.) 23-07-1982 *

Also Published As

Publication number Publication date
JPS63129955U (fr) 1988-08-25
US4896072A (en) 1990-01-23

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