Optical proximity detector

Details Optical proximity detector Optical proximity detector

1983-06-24

1991-02-12

Jordan, Charles T.

Ammunition and explosives

Igniting devices and systems

Ignition or detonation circuit

F42C 1302

Patent

active

049915096

ABSTRACT:
Method and apparatus for optically detecting an object within close proxiy to a structure surface, e.g., the nose of a torpedo or claw of a robotic arm, and generating a responsive control or command signal. A cone of light is emitted from the structure surface to illuminate any object coming within its field. Light reflected from that object to a receiver is processed to generate a responsive first electrical signal. This first signal is further processed to generate a second signal, control or a command signal, only after the first signal has decreased to around 30% of its peak level indicating that the object has closed to within a predetermined distance to the structure surface.

REFERENCES:
patent: 2060199 (1936-11-01), Hammond, Jr.
patent: 2060205 (1936-11-01), Hammond, Jr.
patent: 2255245 (1941-09-01), Ferrel
patent: 3554129 (1971-01-01), Alpers

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