An optical disc reproducing apparatus includes a semiconductor laser, an objective lens converging a laser beam from the semiconductor laser on a recording surface of an optical disc, a polarization plane rotating unit selectively rotating the plane of polarization of the laser beam according to the...http://www.google.es/patents/US6167019?utm_source=gb-gplus-sharePatente US6167019 - Optical Disc cd recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards
Optical Disc cd recording/reproducing apparatus recording/reproducing ...
