Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1995-04-25
1996-11-05
Allen, Stephone
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
25022723, 250226, 356 731, H01J 516, G02B 514
Patent
active
055720161
ABSTRACT:
A built-in-test capability is provided for determining the integrity of an optical fiber connecting: (a) an optical firing unit having a primary light source emitting a first wavelength, a test light source emitting a second wavelength different from the first wavelength, a mechanism both for coupling light from the light sources to the optical fiber and also for coupling the return light to a filter/detector; and (b) an optically initiated device which is coupled to a second end of the optical fiber. The apparatus includes a photoluminescent material disposed at a junction of the optically initiated device and the optical-fiber-second-end. This photoluminescence material photoluminesces at a third wavelength (when exposed to the test light source), and the light travels through the optical fiber and, when detected indicates optical fiber continuity.
REFERENCES:
patent: 4644154 (1987-02-01), Brogardh et al.
patent: 4791293 (1988-12-01), Barriere
patent: 4917014 (1990-04-01), Loughry et al.
patent: 5270537 (1993-12-01), Jacobs
patent: 5359192 (1994-10-01), Williams et al.
Caldwell Paul J.
Wood Lance A.
Worchesky Terrance L.
Allen Stephone
Chin Gay
Martin Marietta Corporation
Morrissey John J.
Rees Brian J.
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