Optical pickup and optical information storage system including the same
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United States of America Patent
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Sep 29, 2015
Grant Date -
Aug 28, 2014
app pub date -
Feb 25, 2014
filing date -
Feb 25, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Provided are an optical pickup and an optical information storage system including the same. The optical pickup includes a diffracting element that splits incident light into main light and a plurality of sub light. The diffracting element has at least three regions including first through third regions. A second region is disposed between a first region and a third region and has a phase difference from the first and third regions. The optical pickup detects a tracking error signal by using light diffracted by the diffracting element.
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