Optical pickup device compatible with two types of optical recording media
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United States of America Patent
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Feb 26, 2008
Grant Date -
Oct 20, 2005
app pub date -
Dec 29, 2004
filing date -
Mar 30, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical pickup device compatible with two types of optical recording media in accordance with the present invention includes: a first light source emitting a first laser beam with a first wavelength; a second light source emitting a second laser beam with a second wavelength greater than the first wavelength; an objective lens with parameters according with the first wavelength and adapted to focus the first and second laser beams on the at least two types of optical recording media; a collimating lens for collimating an incident beam of light and transmitting the collimated light beam to the objective lens; an optical path synthesizer/separator for receiving the first and second laser beams and transmitting the first and second laser beams to the collimating lens; and a compensator for correcting the second laser beams and transmitting the corrected second laser beams to the optical path synthesizer/separator.
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