Intensity-based optical encoder using digital diffractive optic regions
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United States of America Patent
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Oct 25, 2011
Grant Date -
Jul 2, 2009
app pub date -
Jan 2, 2009
filing date -
Jan 2, 2008
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Abstract
An optical encoder and method for measuring displacement information using an optical encoder uses an encoder member with multiple digital diffractive optic regions to optically diffract an incident beam of light to produce output beams of light having intensity distribution patterns, which are used to generate electrical signals that provide relative displacement information of the encoder member.
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