| 摘要 |
PURPOSE:To record and reproduce information at high speed by fixing a disk- shaped recorded picture while deviating an angle corresponding to the integer multiple of a sector in a rotating direction and putting in order the picture by shifting the sector number of a laminated disk-shaped recording surface for each fixed number of sectors in a laminating direction. CONSTITUTION:A recording face #2, 2b is arranged with a recording face #1, 2a as reference while deviating the sector number corresponding to 2 sectors. Further, a recording face #3, 2c is deviated by 2 sectors to the recording face #2, 2b and a recording face #4, 2d is deviated by 2 sectors to the recording face #3, 3c and fixed to a disk rotary shaft 54 of a motor 17. Data D1 are recorded to a sector S1 of the recording face #1, 2a by an optical head 3a and afterwards, the optical head is switched to an optical head 3b. Then, servo drawing-in and track retrieval is executed to the recording face #2, 2b and data D2 are recorded to the next sector S2. Thus, the data can be fixedly recorded and reproduced at high speed and a laminated optical disk which is laminated the plural recorded pictures can be obtained. |
