REPRODUCTION-ONLY OPTICAL DISK AND DRAW TYPE OPTICAL DISK

摘要

PROBLEM TO BE SOLVED: To ensure compatibility in reproduction with a rewritable optical disk without imposing a load on an optical disk device. SOLUTION: The reflectance of CD in totality is made nearly equal to the reflectance of CD-RW e.g. by incorporating a dye material having absorption in the wavelength range of light used into a disk substrate 21.