DISK-LIKE RECORDING CARRIER AND OPTICAL RECORDING/REPRODUCING APPARATUS COMPRISING THE SAME

摘要

An optical recording/reproducing apparatus for adjusting the state of a beam of light so that the jitter of the reproduced signal may be a minimum by applying a bias voltage to a focusing control system. A disk-like recording carrier (21) having a width of pits and an interval in the radial direction the ratios of which to the spot size of the recording/reproducing light beam are predetermined. The focused state of the light beam on the recording carrier is adjusted so that the signal amplitude produced by a pit may be a maximum. Thus, without recording a signal on a recording carrier in advance, the focused state of the light beam is optimized, thereby shortening the starting time of the apparatus.