Fiber optic laser beam detector

Details Fiber optic laser beam detector Fiber optic laser beam detector

1978-10-25

1980-04-08

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

350 9624, G02B 514

Patent

active

041974549

ABSTRACT:
An apparatus for the detection of laser beam perforation of a target. A pality of fiber optic threads are disposed in a grid arrangement behind the target along the anticpated beam sensor line opposite the exposed surface of the target. Upon beam perforation of the target, the laser energy impinges upon the fiber optic threads causing them to produce optical signals and allowing them to behave as light pipes. Groups of these fiber optic threads are gathered together and optically coupled to photo-electrical transducers for generating electrical signals in response to the optical signals generated within the fibers. These electrical signals are detected and recorded to provide accurate information regarding the time and position of laser beam burn through of the target.

REFERENCES:
patent: 3739174 (1973-06-01), Gloge
patent: 3904270 (1975-09-01), Cheo
patent: 3906221 (1975-09-01), Mercier
patent: 4037113 (1977-07-01), Moore
patent: 4047795 (1977-09-01), Hughes et al.

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