APPARATUS AND METHOD FOR FOCUSING A LASER BEAM ON AN OPTICAL DISC
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United States of America Patent
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Issued Date -
Aug 28, 2014
app pub date -
Feb 25, 2014
filing date -
Feb 25, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Provided are a method and apparatus for focusing a laser beam on an optical disc. According to various aspects, the apparatus may include an objective lens which has a numerical aperture below what is standardized for the optical disc. In addition, a collimating lens which is used to focus a laser beam on the objective lens may be positioned at a fixed location. Despite the fixed location, the apparatus may support data recording/reproducing on multiple layers of the optical disc.
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