Optical tablet construction

Details Optical tablet construction Optical tablet construction

1989-06-22

1990-06-26

Buczinski, Stephen C.

Optics: measuring and testing

Angle measuring or angular axial alignment

With photodetection remote from measured angle

2502062, 340707, 356400, 341 5, G01B 1126, G01C 100

Patent

active

049366831

ABSTRACT:
An optical digitizer or tablet employing a linear image sensor behind a microlouver strip and extending along a coordinate axis of a coordinate axes plane. In one embodiment, a non-directional light source floods the plane, and a cursor is provided with a reflector that reflects incident light. In another embodiment, the light source is on the reflector, and the sensor-microlouver combination is located along each tablet edge.

REFERENCES:
patent: 3553680 (1971-01-01), Correman
patent: 3876877 (1975-04-01), Meulensteen et al.
patent: 3923402 (1975-12-01), Turcotte
patent: 3942009 (1976-03-01), Taylor
patent: 4205304 (1980-05-01), Moore
patent: 4568182 (1986-02-01), Modjallal
patent: 4688933 (1987-08-01), Lapeyre
patent: 4837430 (1989-06-01), Hasegawa

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