Data processing input interface determining position of object

Details Data processing input interface determining position of object Data processing input interface determining position of object

1985-10-21

1988-08-09

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

2502221, 356375, 340709, G01V 904, G01B 1114

Patent

active

047629908

ABSTRACT:
The location of an object in a work area is established by sweeping a single light beam over the area and employing in coordinate calculations the rotational arc of the light source, and the serial events of the light variation when the beam is reflected from a mirror positioned on the opposite periphery intersects the object and the light variation when the beam directly intersects the object.

REFERENCES:
patent: 3457646 (1969-07-01), Schwemin
patent: 3553680 (1971-01-01), Cooreman
patent: 3613066 (1971-10-01), Cooreman
patent: 4294543 (1981-10-01), Apple et al.
patent: 4420261 (1983-12-01), Barlow et al.
patent: 4553842 (1985-11-01), Griffin
patent: 4558313 (1985-12-01), Garwin et al.

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