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Multi-beam optical recording/reproducing apparatus for recording/reproducing on a medium having a recording flat part with a guide groove on each side
Multi-beam optical recording/reproducing apparatus for recording/reproducing on a medium having a recording flat part with a guide groove on each side
An optical recording/reproducing apparatus wherein a main beam is converged and projected onto a flat part between tracking guide groove parts adjacent to each other in an optical recording medium to record, reproduce or erase information, two sub-beams on both sides of the main beam are respectively converged and projected so as to cover the guide groove parts to form a tracking system for controlling tracking and one of the two sub-beams is utilized to discriminate the flat part.
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