INITIALIZATION DEVICE AND OPTICAL INFORMATION RECORDING CARRIER

摘要

PROBLEM TO BE SOLVED: To stably obtain an optical disk having little unevenness in the reflectance of the disk, the unevenness generating from the difference in a crystalline state in accordance with the intensity distribution of erasing light due to initialization SOLUTION: The ratio of the minimum to the maximum value of the intensity distribution, in the radial direction A of a beam shape 3 on a recording film, emitted from the optical pickup of an initialization device, is made 0.65 or above by incorporating for example a distribution correcting means for selecting distributed intensity of a light source or for optimizing an erase power; a high performance optical disk is thereby stably obtained which is free from appearing as the residual signal of a tracking error signal or free from developing abnormality of a disk.