Patent ID: 6335912
Filing Date: 2002-01-01
Classification: G11B

Abstract:
An optical information recording apparatus, comprising:reproduction signal detecting means for detecting a reproduction signal in accordance with a pit train or a mark train formed on an optical information recording medium by irradiating a track composed of the pit train or the mark train with a first laser beam to receive a returned beam; position detecting means for detecting a first irradiation position by the first laser beam in accordance with the reproduction signal to output a position detection result; modulating signal generating means for generating a modulating signal by modulating additional information in accordance with the position detection result; and laser beam irradiating means for recording the additional information on the optical information recording medium by modulating a second laser beam with the modulating signal and by irradiating the optical information recording medium with the modulated second laser beam, said laser beam irradiating means irradiating a second irradiation position distant from the first irradiation position by the first laser beam by a prescribed distance at least in a direction perpendicular to the track with the second laser beam.