초록 ▼

A system for laser-ignition of explosives or the like includes a laser system coupled to an optical fiber for conducting light energy to a window positioned at an end of the fiber remote from the laser system. An explosive charge is contained within an initiator housing on a side of the window remot

A system for laser-ignition of explosives or the like includes a laser system coupled to an optical fiber for conducting light energy to a window positioned at an end of the fiber remote from the laser system. An explosive charge is contained within an initiator housing on a side of the window remote from the adjacent fiber end. A dichroic film is positioned at the window surface adjacent to the explosive charge, and is constructed to reflect light energy within one wavelength range and transmit light energy within another wavelength range. The laser system is controlled for selectively transmitting light energy at the one wavelength range to test continuity of the laser-fiber-initiator light path as a function of reflections from the dichroic film, and at the other wavelength range to ignite the explosive charge. In one embodiment of the invention, the dichroic film takes the form of a transparent disc having the film deposited thereon. The disc is of flexible resilient construction, and is sandwiched within the housing between the window surface and the explosive charge. In other embodiments of the invention, the film is formed as a coating on and integral with one of the window surfaces or on the fiber end.

대표청구항 ▼

In a system for laser-ignition of explosives that comprises a laser system, optical transmission means having a first end coupled to the laser system for receiving light energy therefrom and a second end remote from said first end, and an initiator that includes a window at said laser-remote second

In a system for laser-ignition of explosives that comprises a laser system, optical transmission means having a first end coupled to the laser system for receiving light energy therefrom and a second end remote from said first end, and an initiator that includes a window at said laser-remote second end of said transmission means and explosive means contained within a housing adjacent to a surface of the window remote from said second end, the improvement for testing continuity of the laser-transmission means-initiator light path without igniting said explosive means comprising: means at said window forming a dichroic reflector for reflecting light energy within a first wavelength range and transmitting light energy within a second wavelength range, said laser system including means for selectively transmitting light energy within said first and second wavelength ranges, means coupled to said laser system for controlling the same selectively to transmit light energy within said first and second wavelength ranges, and means adjacent to said first end and responsive to light energy reflected from said reflector within said first wavelength range for indicating continuity of said laser-transmission means-initiator light path.