| 摘要 |
PROBLEM TO BE SOLVED: To provide a recording and reproducing device and method in which a disk shaped recording medium set as the subject of recording and reproduction has a first area where information is recorded by a track recording system and a second area where although information is recorded by a prescribed system different from the track recording system, tracks are also formed and with which it becomes possible to control access to the second area in track pitch accuracy and the width of the second area can be narrowed by this amount and it becomes possible to expand the width of the first area as much as the amount in which the width of the second area is narrowed and the increasing of recording capacity can be attained for that amount. SOLUTION: This recording and reproducing device is characterized by being provided with a pickup means with objective lens which becomes the output end of a laser beam which irradiates the recording medium in order to read information or to record information, a displacement mechanism part having a mechanism for displacing the relative positional relation of the objective lens and the radial direction of the recording medium and a driving control means which performs the driving control of the displacement mechanism so as to irradiate the tracks formed in the second area with the laser beam when moving the irradiation position to the second area. COPYRIGHT: (C)2005,JPO&NCIPI
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