Optical disk information recording apparatus and reproducing apparatus having a plurality of read or write beams

摘要

Optical disk information recording apparatus and reproducing apparatus are designed to efficiently improve the transfer rate in information recording and reproduction, and have compatibility with the existing recording apparatus and reproducing apparatus using a single light beam while keeping the disk form with a single spiral track structure. Beam spots are simultaneously irradiated on a plurality of different radial positions on a disk at a pitch of a predetermined number of tracks to independently record various information signals, and the optical head is allowed to jump over a predetermined number of tracks every time the disk makes a predetermined number of turns. Another feature lies in that beam spots are simultaneously irradiated on a plurality of different radial positions on a disk at a pitch of a predetermined number of tracks to independently record various information signals, and a jump over a predetermined number of tracks is made in a predetermined interval corresponding to a period from the point where each light beam has made a track jump during which period signals are stably reproducible or recordable.