Photoluminescence built-in-test for optical systems

Details Photoluminescence built-in-test for optical systems Photoluminescence built-in-test for optical systems

1996-10-30

1998-03-17

Allen, Stephone B.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250226, 25022723, 250554, 356 731, H01J 516, G02B 514

Patent

active

057290121

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 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 second end of the optical fiber. In test mode, this photoluminescent material is exposed to the test light source, which results in photoluminescence at a third wavelength. The photoluminescent light travels through the optical fiber to the detector, and when detected indicates optical fiber continuity. When the system is used to initiate ordnance, the detector can also detect the initial flash of light produced by the ordnance to provide confirmation that the ordnance has ignited.

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.
patent: 5572016 (1996-11-01), Wood et al.

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