Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1987-07-10
1989-08-22
Tarcza, Thomas H.
Optics: measuring and testing
Range or remote distance finding
With photodetection
102213, 342 68, 342166, G01C 308, F42C 1302
Patent
active
048590541
ABSTRACT:
A proximity fuze system includes an optical ranging apparatus, a detonation circuit controlled by the optical ranging apparatus, and an explosive charge detonated by the detonation cirtcuit. The optical ranging apparatus includes a pulsed laser light source for generating target ranging light pulses and optical reference light pulses. A single lens directs ranging pulses to a target and collects reflected light from the target. An optical fiber bundle is used for delaying the optical reference pulses to correspond to a predetermined distance from the target. The optical ranging apparatus includes circuitry for providing a first signal depending upon the light pulses reflected from the target, a second signal depending upon the light pulses from the optical delay fiber bundle, and an output signal when the first and second signals coincide with each other. The output signal occurs when the distance from the target is equal to the predetermined distance form the target. Additional circuitry distinguishes pulses reflected from the target from background solar radiation.
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Chafin James H.
Hightower Judson R.
Libman George H.
Tarcza Thomas H.
The United States of America as represented by the United States
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