In an optical pickup direction detection unit, a detector group receives return light from an optical disc and outputs a light detection electric signal, a push-pull signal generator generates a push-pull signal, and a land prepit signal generator generates a land prepit signal. Further, a direction...http://www.google.fr/patents/US6603716?utm_source=gb-gplus-shareBrevet US6603716 - Optical pickup direction detection unit and optical pickup direction detection method
Optical pickup direction detection unit and optical pickup direction ...
