EP1104540A1 - Zündelement mit einer laserlichtquelle - Google Patents
Zündelement mit einer laserlichtquelleInfo
- Publication number
- EP1104540A1 EP1104540A1 EP99944343A EP99944343A EP1104540A1 EP 1104540 A1 EP1104540 A1 EP 1104540A1 EP 99944343 A EP99944343 A EP 99944343A EP 99944343 A EP99944343 A EP 99944343A EP 1104540 A1 EP1104540 A1 EP 1104540A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- laser light
- explosive
- laser
- ignition
- ignition element
- 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
Links
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 invention relates to an ignition element with a laser light source according to the preamble of the first claim.
- Ignition elements are known in which the explosive which triggers the initial ignition is ignited by means of a laser light source.
- the laser light source is located outside the room that contains the explosive.
- the laser light is fed to the explosive of the initial ignition either via a light guide or through a through-channel.
- Laser optics are usually required to couple the laser light into the through-channel in order to focus the laser light on the explosive in the intensity required for ignition.
- the explosion of the initial detonator ignites the charge of a detonation body, for example a projectile.
- the detonation body can also contain a charge with an explosive, for the ignition of which the energy of the laser light is sufficient, so that no initial ignition is required.
- Laser light source supplied to the explosive of the ignition element.
- a coupling optics is connected between the light guide and the explosive of the ignition element.
- the laser light source is arranged in such a way that the laser light is directed through an opening in a shield which separates the laser light source from the explosive of the ignition element, and a subsequent insulated tube containing the filter and amplifier optics
- the known ignition elements have the disadvantage that the light guide with its coupling optics or that of
- Laser light source upstream filter and amplifier optics are structurally complex.
- the object of the present invention is to present an ignition element with a laser light source which is simpler and cheaper to manufacture and does not have the disadvantages mentioned above.
- the laser light source is a laser diode that is only intended for single use.
- the explosive to be ignited can rest directly on the part of the housing of the laser diode that is permeable to the laser light, the exit surface of the laser light.
- the manufacture of ignition elements is simplified and becomes cheaper, since no coupling of the laser light through an optical system or a light guide is required. In addition, transmission and coupling losses are avoided.
- the part of the housing of the laser diode which is permeable to the laser light and which is permeable to the laser light can be coated with a material which improves the absorption of the laser light, in particular the infrared portion. This increases the effect of the laser light.
- the laser diode can be embedded in the explosive to be ignited, it being expedient if its electrical connections are exposed. With an embedded laser diode, a larger surface area is available for introducing the energy required for ignition.
- the explosive to be ignited and the laser diode can be surrounded by a common housing.
- the explosive and the laser diode can be combined as an ignition device in a one-piece component of small dimensions.
- Versions in which the explosive and the laser diode are combined in a common housing are particularly suitable for gas generators, such as those used in airbags or in belt tensioners.
- FIG. 1 shows a section through a detonation body, in which the laser diode and the explosive are surrounded by a common housing and form an ignition element provided for initial ignition, and
- Figure 2 shows a section through a detonation body, in which the laser diode is embedded directly in the explosive to be ignited.
- FIG. 1 shows an ignition element 1 in a detonation body 2 as a sectional view.
- the ignition element 1 in the present exemplary embodiment consists of a laser diode 3, which is accommodated in a common housing 5 together with the explosive 4 which triggers the initial ignition.
- This ignition element 1 is inserted into the housing 6 of the detonation body 2 and extends into its explosive or powder charge 7.
- the housing 12 of the laser diode 3 is transparent to the laser light 13.
- the part of the housing part 12 which is permeable to the laser light 13 and which faces the explosive 4 for the initial ignition forms a window 14 in the common housing 5 of the laser diode 3 and the explosive 4.
- a laser light 13 which is matched to the ignition of the explosive 4 for initial ignition is generated.
- the laser light 13 emerges from the laser 11 at a certain angle, usually between 20 ° and 30 °, strikes the explosive 4 and ignites it.
- the energy density of the laser light 13 depends on the design of the laser diode 3 and thus on its output power, on the exit angle of the laser light
- the ignition behavior of the cargo can be significantly improved if the window
- FIG. 2 shows a further embodiment of the invention.
- the structure of the laser diode does not differ from the laser diode in the exemplary embodiment according to FIG. 1. For this reason, matching components are designated with the same reference numbers.
- the ignition element 101 in the present exemplary embodiment consists of the laser diode 3, which is inserted directly into the explosive of the charge 107 of the detonation body 102 and is completely surrounded by it, except for the electrical connections 9.
- the charge 107 does not require initial ignition in the present exemplary embodiment.
- the energy by the laser light 13 from the laser diode 3 in the Charge 107 is introduced is sufficient to ignite it.
- the housing 106 of the detonation body 102 encloses both the charge 107 and the ignition element 101.
- a substance 115 is directly mixed into the explosive of the charge 107, which improves the absorption of the laser light 13, in particular its infrared portion.
- the ignition elements according to the invention are particularly suitable for installation in gas generators which are used in airbags and belt tensioners.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Semiconductor Lasers (AREA)
- Air Bags (AREA)
- Optical Couplings Of Light Guides (AREA)
- Portable Nailing Machines And Staplers (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19837839A DE19837839A1 (de) | 1998-08-20 | 1998-08-20 | Zündelement mit einer Laserlichtquelle |
DE19837839 | 1998-08-20 | ||
PCT/EP1999/005719 WO2000011428A1 (de) | 1998-08-20 | 1999-08-07 | Zündelement mit einer laserlichtquelle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1104540A1 true EP1104540A1 (de) | 2001-06-06 |
EP1104540B1 EP1104540B1 (de) | 2003-04-09 |
Family
ID=7878175
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99944343A Expired - Lifetime EP1104540B1 (de) | 1998-08-20 | 1999-08-07 | Zündelement mit einer laserlichtquelle |
Country Status (7)
Country | Link |
---|---|
US (1) | US6499404B1 (de) |
EP (1) | EP1104540B1 (de) |
JP (1) | JP2002537534A (de) |
AT (1) | ATE237119T1 (de) |
DE (2) | DE19837839A1 (de) |
ES (1) | ES2196850T3 (de) |
WO (1) | WO2000011428A1 (de) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE0100864L (sv) * | 2001-03-14 | 2002-09-03 | Bofors Bepab Ab | Sätt och anordning för initiering av explosivämnesladdningar |
US7201103B1 (en) | 2002-02-25 | 2007-04-10 | Bofors Bepab Ab | Method for initiation and ignition of explosive charges through self-destruction of a laser source |
FR2888234B1 (fr) * | 2005-07-05 | 2008-05-02 | Saint Louis Inst | Composition energetique dopee optiquement |
BRPI0808958B1 (pt) * | 2007-03-16 | 2019-11-05 | Orica Explosives Tech Pty Ltd | sistema de explosão isento de detonador, e, método para iniciar um explosivo a granel |
GB2448771A (en) * | 2007-04-28 | 2008-10-29 | S Rafi Ahmad | Means for achieving low order detonation of a device filled with a metal oxyanion / bidentate fuel ligand complex by means of a low power diode laser |
JP2009008325A (ja) * | 2007-06-28 | 2009-01-15 | Ihi Aerospace Co Ltd | 爆発物の処理方法 |
US7942097B1 (en) * | 2008-03-06 | 2011-05-17 | Sandia Corporation | Modular initiator with integrated optical diagnostic |
EP2567183B1 (de) * | 2010-05-07 | 2019-10-23 | Orica International Pte Ltd | Zündvorrichtung, sprengsystem und sprengverfahren |
FR2978762B1 (fr) * | 2011-08-01 | 2013-08-02 | Nexter Munitions | Detonateur de securite |
US11131530B2 (en) | 2018-01-29 | 2021-09-28 | Lawrence Livermore National Security, Llc | Opto-thermal laser detonator |
US11407378B2 (en) * | 2019-03-18 | 2022-08-09 | Andras Fenyves | Airbag system and related methods of inflating an airbag |
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 |
US11209257B2 (en) * | 2019-12-12 | 2021-12-28 | Northrop Grumman Systems Corporation | Voltage polarity immunity using reverse parallel laser diodes |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3362329A (en) | 1963-12-10 | 1968-01-09 | Epstein Sidney | Electro-explosive devices |
US4343242A (en) * | 1980-04-28 | 1982-08-10 | Gould Inc. | Laser-triggered chemical actuator for high voltage isolation |
US4660472A (en) * | 1985-10-07 | 1987-04-28 | Morton Thiokol Inc. | Optical through bulkhead initiator and safe-arm device |
DE3542447C2 (de) * | 1985-11-30 | 1993-11-18 | Diehl Gmbh & Co | Laserempfindliche Anzündmischung |
EP0289184B1 (de) * | 1987-04-30 | 1991-12-27 | Nippon Oil And Fats Company, Limited | Mittels eines Laserstrahles zündbare Sprengkapsel |
DE3838896C2 (de) * | 1988-11-17 | 1999-07-01 | Dynamit Nobel Ag | Mit einer Speicherschicht versehenes laserinitiierbares Zünd-/Anzündelement |
DE3909952A1 (de) * | 1989-03-25 | 1990-09-27 | Dynamit Nobel Ag | Laserinitiierbares zuend-/anzuendmittel |
US5206455A (en) * | 1991-03-28 | 1993-04-27 | Quantic Industries, Inc. | Laser initiated ordnance systems |
US5204490A (en) * | 1991-06-21 | 1993-04-20 | Mcdonnell Douglas Corporation | Laser diode apparatus for initiation of explosive devices |
US5212339A (en) * | 1992-03-27 | 1993-05-18 | The United States Of America As Represented By The United States Department Of Energy | Explosive laser light initiation of propellants |
GB2267330A (en) * | 1992-05-23 | 1993-12-01 | Secr Defence | Laser ignition of gas generators |
US5660413A (en) * | 1995-08-24 | 1997-08-26 | Trw Vehicle Safety Systems Inc. | Air bag inflator with laser diode initiator |
US5756924A (en) * | 1995-09-28 | 1998-05-26 | The Regents Of The University Of California | Multiple laser pulse ignition method and apparatus |
FR2796142B1 (fr) * | 1999-07-06 | 2002-08-09 | Saint Louis Inst | Detonateur optique a deux etages et a transition choc-detonation |
-
1998
- 1998-08-20 DE DE19837839A patent/DE19837839A1/de not_active Withdrawn
-
1999
- 1999-08-07 DE DE59904975T patent/DE59904975D1/de not_active Expired - Fee Related
- 1999-08-07 WO PCT/EP1999/005719 patent/WO2000011428A1/de active IP Right Grant
- 1999-08-07 US US09/763,193 patent/US6499404B1/en not_active Expired - Fee Related
- 1999-08-07 JP JP2000566638A patent/JP2002537534A/ja not_active Withdrawn
- 1999-08-07 EP EP99944343A patent/EP1104540B1/de not_active Expired - Lifetime
- 1999-08-07 ES ES99944343T patent/ES2196850T3/es not_active Expired - Lifetime
- 1999-08-07 AT AT99944343T patent/ATE237119T1/de not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO0011428A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2000011428A1 (de) | 2000-03-02 |
JP2002537534A (ja) | 2002-11-05 |
US6499404B1 (en) | 2002-12-31 |
DE19837839A1 (de) | 2000-02-24 |
DE59904975D1 (de) | 2003-05-15 |
ES2196850T3 (es) | 2003-12-16 |
ATE237119T1 (de) | 2003-04-15 |
EP1104540B1 (de) | 2003-04-09 |
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