Optical pickup and optical disk apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Nov 12, 2013
Grant Date -
Apr 18, 2013
app pub date -
Dec 10, 2012
filing date -
Nov 24, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
According to one embodiment, an optical pickup configured to record and to reproduce on a layer of a disk, including, a light source configured to emit a laser beam, an objective lens including a variable use magnification and configured to focus the laser beam on the layer, a collimator lens configured to change the magnification of the objective lens by moving along an optical axis direction, and a liquid crystal module configured to generate spherical aberration to cancel a coma aberration which may occur because an object point and an image point of the objective lens at the use magnification do not exist on an optical axis of the objective lens.
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