摘要 |
<p>An optical pickup apparatus including three semiconductor laser devices which emit laser beams of different wavelengths, a beam splitter, a collimator lens, a hologram device, two light receiving devices, a diffraction grating-hologram device, an integrated substrate, a light detection/source unit and diffraction gratings, whereby the three semiconductor laser devices share the beam splitter and the collimator lens.</p> |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;NISHIMOTO, MASAHIKO;KOCHI, YASUYUKI;IJIMA, SHINICHI;OKUDA, TAKUYA;ONO, MASAYUKI |
发明人 |
NISHIMOTO, MASAHIKO;KOCHI, YASUYUKI;IJIMA, SHINICHI;OKUDA, TAKUYA;ONO, MASAYUKI |