OPTICAL PICKUP DEVICE AND OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE
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United States of America Patent
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Issued Date -
Oct 4, 2007
app pub date -
Mar 20, 2007
filing date -
Mar 30, 2006
priority date (Note) -
Abandoned
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Abstract
There is disclosed an optical pickup device having semiconductor laser light sources for first, second, and third wavelengths different from each other. After optical paths of laser beams outgoing from the first and second semiconductor laser light sources are synthesized by a first prism, an optical path of a laser beam outgoing from the third semiconductor laser light source is synthesized, through a magnification change lens, to raise light efficiency. At this time, each of the laser beams is synthesized by a second prism.
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