Ammunition and explosives – Igniting devices and systems – Laser or light initiated
Patent
1990-02-14
1991-05-14
Jordan, Charles T.
Ammunition and explosives
Igniting devices and systems
Laser or light initiated
F42B 3113
Patent
active
050146203
ABSTRACT:
By interposing, in a detonator/igniter (or igniting) element directly initiatable by a laser pulse, a layer of adequate absorbance over the optical spectral region, which layer can be faded out at the wavelength of the detonator laser, into the beam path, then the layer acts as a switch preventing light other than the laser pulse intended for triggering from setting off detonation of a primary charge within the element. The switching function, i.e., the intensity at which a laser pulse is allowed to pass through, depends on the spectral characteristics of the bleachable absorber and should range between 10.sup.7 and 10.sup.12 W/cm.sup.2. The bleachable absorber is a passive element offering considerable protection from erroneous triggering by light other than the intended laser pulse; it can be manufactured and integrated into the element in an inexpensive and controllable way and does not require any substantial raising of the energy of the laser.
REFERENCES:
patent: 3177651 (1965-04-01), Lawrence
patent: 3362329 (1968-01-01), Epstein
patent: 3685392 (1972-08-01), Platt
patent: 3724383 (1973-04-01), Gallaghan et al.
patent: 4917014 (1990-04-01), Loughry et al.
Dynamit Nobel Aktiengesellschaft
Jordan Charles T.
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