Distributed optical fiber device for digitizer tablet

Details Distributed optical fiber device for digitizer tablet Distributed optical fiber device for digitizer tablet

1990-02-16

1991-03-19

Schreyer, Stafford D.

Telegraphy

Systems

Position coordinate determination for writing

173 19, 173 18, 362 33, 362 92, G08C 2100

Patent

active

050013068

ABSTRACT:
An optical device comprising a sheet of optical fibers having different lengths so that the fiber ends are distributed uniformly over a given area. The device is mounted in a digitizer tablet above or below its electrode array. When light is pumped into the free fiber ends, a pattern of light spots are formed which can be spread out to illuminate the tablet's working surface. When driven by a light pen, a similar optical device can be used to locate the light pen for menu-picking functions.

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