High-resolution encoder array

Details High-resolution encoder array High-resolution encoder array

2011-08-09

2011-08-09

Pham, Hoa Q (Department: 2886)

Optics: measuring and testing

Position or displacement

C702S150000, C702S158000

Reexamination Certificate

active

07995217

ABSTRACT:
A position sensing apparatus and method, motion control system, and integrated circuit are provided that include a plurality of sensors and a tracking processor. The plurality of sensors includes a linear array of sensors that sense a plurality of features of an object. A spacing between two of the plurality of sensors is substantially smaller than a spacing between two of the plurality of features. The tracking processor samples signals from the sensors, compares the samples to previous samples and calculates a position of the object. The plurality of sensors may include a second linear array of sensors. Centers of the sensors of the second linear array may be offset from centers of the sensors of the first linear array along a longitudinal axis of the plurality of sensors.

REFERENCES:
patent: 4811229 (1989-03-01), Wilson
patent: 7428283 (2008-09-01), Oh et al.

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