Pointing device with differential optomechanical sensing device

Details Pointing device with differential optomechanical sensing device Pointing device with differential optomechanical sensing device

G - Physics

06

F

G06F 3/033 (2006.01)

Patent

CA 2103649

ABSTRACT A pointing device including a ball engaging one or more shaft encoders, each shaft encoder having an encoding wheel, including a monolithic photosensitive array for detecting light pulses representative of rotary movement of the ball. The photosensitive array provides a plurality of resolutions and permits accurate tracking of rotary movement of the ball without need for a mask. Comparator and latch means operate on the output of the array and provides digital hysteresis.

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