Method and system for calibrating a rotary encoder and making a high resolution rotary encoder
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United States of America Patent
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Aug 19, 2008
Grant Date -
Jun 26, 2008
app pub date -
Dec 22, 2006
filing date -
Dec 22, 2006
priority date (Note) -
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Abstract
A calibration system for a rotary encoder comprises a rotary encoder disposed on a manufacturing substrate, the rotary encoder including an encoder pattern. The calibration system also includes a calibration pattern written onto a surface of the substrate, the calibration pattern comprising a ring that includes a grating pattern, where a radial position of the grating pattern corresponds to an error value of the position of the encoder pattern. A method of calibrating the errors of a rotary encoder and a method of fabricating a high resolution rotary encoder on a surface of a manufacturing substrate are also provided.
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