RECORDING POSITION SHIFT CORRECTION DEVICE, RECORDING POSITION SHIFT CORRECTION METHOD, AND RECORDING POSITION SHIFT CORRECTION PROGRAM

摘要

The conventional recording position shift correction device has problems that it is difficult to acquire the physical address position during write once operation and it is impossible to calculate a recording position shift amount with a high reliability, which in turn disables accurate correction of the recording position shift. There is provided a recording position shift correction with a high reliability by employing one of the following calculation methods for calculating the recording position shift amount in the write once process: (1) an interpolation process is performed according to the physical address position before performing the write once process so as to detect the physical address position during the write once process and the recording position shift amount is calculated by using the physical address position detected; (2) the recording position shift amount during the write once process is calculated according to the position shift amount before performing the write once process; (3) the physical address position is acquired in a stable condition by stabilizing the laser power applied during acquisition of the physical address position in the recording process and the recording position shift amount is calculated by using the physical address position acquired.