Telegraphy – Systems – Position coordinate determination for writing
Patent
1994-06-09
1996-06-11
Chin, Stephen
Telegraphy
Systems
Position coordinate determination for writing
178 19, 345156, 345179, 345180, 345182, G08C 2100, G09G 302
Patent
active
055257640
ABSTRACT:
A graphic input system for digitizing the location of an object moving on a planar surface and utilizing two or more primary laser light beams, the output beam of each scanning the planar surface through interposed controllably pivotally mounted beam deflecting scan mirrors. A stylus is moved over the planar surface in response to the position of the deflected position of the scanning beam. A signal generating beam detector positioned adjacent the planar surface delivers signals to a logical circuit to create the instantaneous value of a position voltage signal which is proportional to the tangent of the scan angle of each of the controllably deflected laser beams.
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Browder Andrew M.
Gadhok Jagmohan S.
Junkins John L.
Kinra Vikram K.
Chin Stephen
Shankar Vijay
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