Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1996-12-18
1998-10-06
Allen, Stephone B
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
2502081, 318687, G01B 7287
Patent
active
058180397
ABSTRACT:
An imaging system for a linear motor that provides information concerning movement of the same along a plurality of directions, with the information concerning motion along any one direction being substantially unaffected by motion of the motor in a differing direction. In this fashion, a plurality of detectors may be mounted onto the rotor of the linear motor to sense movement along a particular direction, with the detector being insensitive to motion of the motor along a differing direction. The system includes a substantially planar surface, such as a platen, having disposed thereon a pattern forming a two dimensional grid-like array.
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Allen Stephone B
Schneck Thomas
Yaskawa Electric America, Inc.
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