| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical information recording/reproducing unit for recording and reproducing information quickly on an optical disk in which information can be recorded on the recording layers of different depths. SOLUTION: When recording information at a recording position located at the prescribed depth in the recording layer, the information about depth of the recording position (for example, No. 1, etc.) is recorded in the recording layer with the information to be recorded. Therefore, while information is recorded or reproduced for the optical disc, the optical information recording reproducing apparatus stores the information about depth of the recording position (the first layer) where information has been recorded or reproduced in advance. Even when the light flux from the semiconductor layer LD jumps to a different depth position due to an external disturbance such as a vibration that has occurred during the recording or reproduction of information, the light flux can return immediately to the original depth position (the first layer) based on the stored information about the depth of the recording position to record/reproduce the information without delay. COPYRIGHT: (C)2009,JPO&INPIT
|
