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Method of making an integral window hermetic fiber optic component

United States Patent

5,573,565
November 12, 1996
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
In the fabrication of igniters, actuators, detonators, and other pyrotechnic devices to be activated by a laser beam, an integral optical glass window is formed by placing a preform in the structural member of the device and then melting the glass and sealing it in place by heating at a temperature between the ceramming temperature of the glass and the melting point of the metal, followed by rapid furnace cooling to avoid devitrification. No other sealing material is needed to achieve hermeticity. A preferred embodiment of this type of device is fabricated by allowing the molten glass to flow further and form a plano-convex lens integral with and at the bottom of the window. The lens functions to decrease the beam divergence caused by refraction of the laser light passing through the window when the device is fired by means of a laser beam.
Dalton; Rick D. (Miamisburg, OH), Kramer; Daniel P. (Centerville, OH), Massey; Richard T. (Hamilton, OH), Waker; Damon A. (Bellbrook, OH)
The United States of America as represented by the Department of Energy (Washington, DC)
08/ 262,125
June 17, 1994
The United States Government has rights in this invention pursuant to Contract No. DE-AC04-88DP43495 awarded by the United States Department of Energy to EG&G Mound Applied Technologies.