EP1067356A1 - Optischer Zünder mit einem Gradientenindex-Glasstab - Google Patents

Optischer Zünder mit einem Gradientenindex-Glasstab Download PDF

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Publication number
EP1067356A1
EP1067356A1 EP00401935A EP00401935A EP1067356A1 EP 1067356 A1 EP1067356 A1 EP 1067356A1 EP 00401935 A EP00401935 A EP 00401935A EP 00401935 A EP00401935 A EP 00401935A EP 1067356 A1 EP1067356 A1 EP 1067356A1
Authority
EP
European Patent Office
Prior art keywords
optical
optical fiber
connector
pyrotechnic composition
surrounds
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
EP00401935A
Other languages
English (en)
French (fr)
Other versions
EP1067356B1 (de
Inventor
Henry Moulard
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.)
Institut Franco Allemand de Recherches de Saint Louis ISL
Original Assignee
Institut Franco Allemand de Recherches de Saint Louis ISL
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 Institut Franco Allemand de Recherches de Saint Louis ISL filed Critical Institut Franco Allemand de Recherches de Saint Louis ISL
Publication of EP1067356A1 publication Critical patent/EP1067356A1/de
Application granted granted Critical
Publication of EP1067356B1 publication Critical patent/EP1067356B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/113—Initiators therefor activated by optical means, e.g. laser, flashlight

Definitions

  • the present invention relates to an igniter optics comprising a pyrotechnic composition of which ignition is achieved by laser radiation which is brought to this pyrotechnic composition by an optical fiber.
  • one of the ends of the optical fiber is connected to a laser radiation source and the other end of this fiber is engaged in a connector.
  • This type of optical igniter also includes means for ensuring a removable mechanical connection between the fiber optic connector and the pyrotechnic composition.
  • the object of the present invention is to overcome the above difficulties, by creating an optical igniter both simple to make and to assemble, inexpensive, which saves energy and whose functioning is perfectly reliable.
  • the invention thus relates to an optical igniter comprising a pyrotechnic composition and a fiber one end of which is connected to a source of laser radiation, the other end adjacent to the pyrotechnic composition being engaged in a connector, means ensuring a mechanical connection removable between the fiber optic connector and the pyrotechnic composition.
  • this optical igniter is characterized in that between the connector and the pyrotechnic composition is inserted a glass rod whose axis is aligned along the axis of the optical fiber and that of the pyrotechnic composition, this bar in glass having an index gradient and consisting of one or two coaxial parts in contact with the composition pyrotechnic and with the end of the optical fiber, so that the laser radiation from said end of the optical fiber crosses the bar in glass and focuses on the face of the glass rod contact with the pyrotechnic composition.
  • the insertion of the aforementioned glass bar between the optical fiber and the pyrotechnic composition ensures perfect transmission of laser energy to this pyrotechnic composition, which guarantees a perfectly reliable operation of the igniter.
  • the gradient glass bar index is engaged in a bore in a element of thermally non-conductive material.
  • This material may be made of metal which is not very thermally conductive, which excludes copper and aluminum.
  • the above item can also be ceramic.
  • the element in slightly thermally conductive material is shaped cylindrical or frustoconical.
  • the optical igniter comprises a composition pyrotechnics 1 and an optical fiber 2 including one end is connected to a radiation source laser such as a laser diode.
  • connection ring 3a The other end of fiber optic 2 adjacent to the pyrotechnic composition 1 is engaged in a connector 3 carried by a connection ring 3a.
  • Means which will be detailed later provide a removable mechanical connection between the fiber optic connector 2 and composition pyrotechnics 1.
  • This bore 5 contains a glass rod 6 to index gradient one side of which is in contact with the pyrotechnic composition 1.
  • the opposite side of the bar glass 6 is intended, after mounting to come in contact with the end 2a of the optical fiber 2.
  • laser radiation 7 (see figure 2) from the end 2a of the optical fiber 2 cross the glass rod 6 and focuses on the face 6d of the glass rod 6 in contact with the composition pyrotechnics 1.
  • Element 4 made of non-conductive material thermally can be made of non-conductive metal thermally, such as stainless steel. Metals such that copper and aluminum cannot agree.
  • Element 4 made of non-conductive material thermally can also be ceramic.
  • element 4 in slightly thermally conductive material is shaped cylindrical.
  • cylinder 4 is housed in a cylindrical cavity 8 formed in the metallic envelope 9 which surrounds the composition pyrotechnic 1.
  • a tip 11 is screwed into a bore threaded 9a of the casing 9, so that the end piece presses hermetically cylinder 4 against composition pyrotechnics 1.
  • the diameter of the gradient glass rod 6 index can vary between 1 and 2 mm approximately.
  • the length of the gradient glass rod index is of the order of 5 mm.
  • This length is such that the radiation laser 7 from optical fiber 2 can focus on its end.
  • the ratio of the length of the glass rod 6 on its diameter corresponds to the characteristic half-step optics of gradient index glass.
  • the cylinder 4 which carries the bar 6 is housed in a cylindrical cavity 8a formed in the metal tip 11a which surrounds the connector 3 of the optical fiber (2) after screwing in the metallic envelope 9 which surrounds the composition pyrotechnics 1.
  • the bar 6 made of gradient index glass is housed in a bore 5a made in the metal tip 11b which after mounting surrounds the connector 3 of the optical fiber 2 and which is screwed into the metal casing 9 which surrounds the pyrotechnic composition 1.
  • the bar in Gradient index glass is in two parts.
  • a first part 6a of the gradient glass bar index is housed in a bore 5b made in a metal tip 11c which after mounting surrounds the connector 3 of the optical fiber 2 and which is screwed into the metallic envelope 9 which surrounds the composition pyrotechnics 1.
  • a second part 6b of the bar in glass is housed in a bore in an element 12 attached to the end of the fiber connector 3 optics 2.
  • Figure 6 shows the arrangement of the two bar parts 6a, 6b, after screwing on the ring 3a on tip 11c.
  • the ratio of the length to the diameter of each part 6a, 6b of the glass rod corresponds to the quarter characteristic optical step of the gradient index glass.
  • Figure 6 also illustrates the path of the laser radiation in the two parts 6a, 6b of Gradient index bar.
  • the laser radiation focuses on the end of the pyrotechnic composition 1.
  • FIG. 6 shows that a space d exists between the two bar parts 6a, 6b. This distance d can vary from one igniter to another, which thus makes it possible to compensate for manufacturing tolerances and to save manufacturing and assembly costs.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optical Couplings Of Light Guides (AREA)
EP00401935A 1999-07-06 2000-07-05 Optischer Zünder mit einem Gradientenindex-Glasstab Expired - Lifetime EP1067356B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9908717A FR2796166B1 (fr) 1999-07-06 1999-07-06 Allumeur optique a barreau en verre a gradient d'indice
FR9908717 1999-07-06

Publications (2)

Publication Number Publication Date
EP1067356A1 true EP1067356A1 (de) 2001-01-10
EP1067356B1 EP1067356B1 (de) 2004-06-09

Family

ID=9547766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00401935A Expired - Lifetime EP1067356B1 (de) 1999-07-06 2000-07-05 Optischer Zünder mit einem Gradientenindex-Glasstab

Country Status (4)

Country Link
US (1) US6539868B1 (de)
EP (1) EP1067356B1 (de)
DE (1) DE60011347T2 (de)
FR (1) FR2796166B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2914056A1 (fr) 2007-03-21 2008-09-26 Nexter Munitions Sa Initiateur opto pyrotechnique
EP2386819A1 (de) 2010-05-10 2011-11-16 Institut Franco-Allemand de Recherches de Saint-Louis Vorrichtung zum Zünden eines Initialzünders
CN111121545A (zh) * 2019-12-10 2020-05-08 南京理工大学 一种光纤式激光点火器及点火系统

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2831659B1 (fr) * 2001-10-26 2004-04-09 Saint Louis Inst Detonateur optique basse energie
FR2846408B1 (fr) 2002-10-23 2005-06-03 Dassault Aviat Dispositif d'initiation d'une charge pyrotechnique
US7478594B1 (en) * 2006-10-23 2009-01-20 The United States Of America As Represented By The Secretary Of The Army Laser primer
FR2978762B1 (fr) * 2011-08-01 2013-08-02 Nexter Munitions Detonateur de securite
CN104166187B (zh) * 2013-05-17 2016-05-18 中航光电科技股份有限公司 防爆型激光点火光纤连接器
CN104166186B (zh) * 2013-05-17 2016-08-31 中航光电科技股份有限公司 激光点火光纤连接器
CN104570231A (zh) * 2014-12-11 2015-04-29 中航光电科技股份有限公司 抗爆炸冲击的光纤连接器插座
RU2592014C2 (ru) * 2014-12-12 2016-07-20 Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" (Госкорпорация "Росатом") Лазерное средство инициирования
RU2601845C2 (ru) * 2015-04-08 2016-11-10 Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" Устройство для инициирования зарядов взрывчатых веществ

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4870903A (en) * 1987-05-20 1989-10-03 Aerospatiale Societe Nationale Industrielle Photopyrotechnical detonation device and photopyrotechnical chain using this device
US4930418A (en) * 1989-06-23 1990-06-05 Whittaker Ordnance, Inc. Method for sealing optical windows in explosive initiators
US4934804A (en) * 1989-01-13 1990-06-19 Whittaker Ordnance, Inc. Focusing optical explosive initiator and initiator window
EP0394562A2 (de) * 1989-04-24 1990-10-31 Kms Fusion, Inc. Laserzündvorrichtung für Sprengladungen
US5052300A (en) * 1989-05-12 1991-10-01 Societe Nationale Industrielle Et Aerospatiale Pyrotechnic priming device having a microlens set by a shape memory material and pyrotechnic chain utilizing said device
US5206455A (en) * 1991-03-28 1993-04-27 Quantic Industries, Inc. Laser initiated ordnance systems
JPH08303301A (ja) * 1995-05-10 1996-11-19 Mitsubishi Heavy Ind Ltd レーザ着火式火工品発火部
WO1999030107A1 (en) * 1997-12-12 1999-06-17 Eg & G, Inc. A hermetically sealed laser actuator/detonator and method of manufacturing the same
US5914458A (en) * 1997-03-14 1999-06-22 Quantic Industries, Inc. Dual fiber laser initiator and optical telescope

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3528372A (en) * 1967-09-08 1970-09-15 Space Ordnance Systems Inc Explosive detonating device
US3724383A (en) * 1971-02-01 1973-04-03 Us Navy Lasser stimulated ordnance initiation device
US3812783A (en) * 1972-08-03 1974-05-28 Nasa Optically detonated explosive device
US4343242A (en) * 1980-04-28 1982-08-10 Gould Inc. Laser-triggered chemical actuator for high voltage isolation
US4898095A (en) * 1986-10-20 1990-02-06 Nippon Oil And Fats Company, Limited And Kajima Corporation Laser beam-detonatable blasting cap
US5179247A (en) * 1991-07-15 1993-01-12 Ensign-Bickford Aerospace Corporation Optically initiated detonator

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4870903A (en) * 1987-05-20 1989-10-03 Aerospatiale Societe Nationale Industrielle Photopyrotechnical detonation device and photopyrotechnical chain using this device
US4934804A (en) * 1989-01-13 1990-06-19 Whittaker Ordnance, Inc. Focusing optical explosive initiator and initiator window
EP0394562A2 (de) * 1989-04-24 1990-10-31 Kms Fusion, Inc. Laserzündvorrichtung für Sprengladungen
US5052300A (en) * 1989-05-12 1991-10-01 Societe Nationale Industrielle Et Aerospatiale Pyrotechnic priming device having a microlens set by a shape memory material and pyrotechnic chain utilizing said device
US4930418A (en) * 1989-06-23 1990-06-05 Whittaker Ordnance, Inc. Method for sealing optical windows in explosive initiators
US5206455A (en) * 1991-03-28 1993-04-27 Quantic Industries, Inc. Laser initiated ordnance systems
JPH08303301A (ja) * 1995-05-10 1996-11-19 Mitsubishi Heavy Ind Ltd レーザ着火式火工品発火部
US5914458A (en) * 1997-03-14 1999-06-22 Quantic Industries, Inc. Dual fiber laser initiator and optical telescope
WO1999030107A1 (en) * 1997-12-12 1999-06-17 Eg & G, Inc. A hermetically sealed laser actuator/detonator and method of manufacturing the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 03 31 March 1997 (1997-03-31) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2914056A1 (fr) 2007-03-21 2008-09-26 Nexter Munitions Sa Initiateur opto pyrotechnique
EP2386819A1 (de) 2010-05-10 2011-11-16 Institut Franco-Allemand de Recherches de Saint-Louis Vorrichtung zum Zünden eines Initialzünders
CN111121545A (zh) * 2019-12-10 2020-05-08 南京理工大学 一种光纤式激光点火器及点火系统

Also Published As

Publication number Publication date
FR2796166A1 (fr) 2001-01-12
DE60011347D1 (de) 2004-07-15
EP1067356B1 (de) 2004-06-09
US6539868B1 (en) 2003-04-01
FR2796166B1 (fr) 2003-05-30
DE60011347T2 (de) 2004-10-07

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