Photopyrotechnic priming device with a shape memory alloy which is enclosed by a material with a pyrotechnic microlens and pyrotechnic chain for this device.

摘要

The priming device is a miniature device consisting of a hollow body (18) intended to receive a pyrotechnic substance (24), a rigid graded index microlens (30) mounted in the hollow body to focus a high energy beam of given wavelength on to the pyrotechnic substance, a short length of tubing (32) made of a shape-memory metal or alloy housed in the body (18) and ensuring that the microlens is locked in the body of the device. At room temperature, the inner diameter of the length of tubing is less than the diameter of the lens. The microlens- tubing assembly and the optical fibre (12) carrying the laser beam are held in position by a connector (34) fixed on to the body (18). …IMAGE…