Optical Proximity Detector.
Patent, Filed 24 Jun 83, patented 12 Feb 91,
DEPARTMENT OF THE NAVY WASHINGTON DC
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Method and apparatus for optically detecting an object within close proximity 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. Author
- Optical Detection and Detectors