Method of and apparatus for optical recording and reproducing of information

摘要

Information is recorded or reproduced by moving a recording medium (1) relative to an optical head (7). In order to execute information recording onto the medium (1) in the course of the relative movement involving acceleration and deceleration, the generation timing and intensity of a light beam to be generated in correspondence with the information to be recorded are controlled in response to a varying speed of the relative movement so that data pits to be formed in the recording medium can be standardized in pitch and size irrespective of the relative movement speed (SDP). Also, in order to permit information reproduction from the medium (1) in the course of the relative movement involving acceleration and deceleration, reproduction timing of data read by the optical head (7) is set in synchronism with variation in the relative movement speed (SDP) so that the data can be reproduced at proper timing irrespective of the relative movement speed.