초록 ▼

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 l

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 107 and 1012 W/cm2. 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.

대표청구항 ▼

A detonator/igniter element which comprises a housing containing an explosive charge which can be initiated directly by laser light, and means for defining an optical path to said explosive charge, said means comprising a bleachable absorber and exhibiting properties such that light below an intensi

A detonator/igniter element which comprises a housing containing an explosive charge which can be initiated directly by laser light, and means for defining an optical path to said explosive charge, said means comprising a bleachable absorber and exhibiting properties such that light below an intensity threshold in the range of from 107 to 1012 W/cm2 is weakened to such an extent that initiation of the explosive charge by this light is impossible, but initiation of the explosive charge by the laser light is possible.