An optical pickup capable of compatibly adopting disks of different formats which are placed in an optical player includes a first optical source for emitting light having a predetermined wavelength, a second optical source for emitting light having a wavelength different from that of light emitted from...http://www.google.fr/patents/US5933401?utm_source=gb-gplus-shareBrevet US5933401 - Optical pickup having plural optical sources and plural optical detectors
Optical pickup having plural optical sources and plural optical detectors
