| 摘要 |
An optical disk structure and optical disk recorder which enables data to be rewritten onto the recording layer of the optical disk Ä50Ü. A clock reference structure is permanently formed along servo tracks Ä52, 54, 56Ü of the optical disk Ä50Ü. An optical transducer Ä82Ü is coupled to the clock reference structure and generates a clock reference signal simultaneously with writing new data onto the recording layer of the optical disk Ä50Ü. The data is written as data marks Ä58Ü along the servo tracks Ä52, 54, 56Ü. Each of the data marks Ä58Ü includes edges. The edges of the data marks Ä58Ü are recorded in synchronization with a write clock. The write clock is phase-locked with the clock reference signal. Therefore, the edges of the data marks Ä58Ü are aligned with the clock reference structure with sub-bit accuracy. Standard DVD-ROM disk readers are not able to detect the high spatial frequency of the clock reference structure. Therefore, the optical disk Ä50Ü structure and optical disk recorder of this invention allow production of re-writable optical disks which can be read by standard DVD-ROM disk readers. <IMAGE> |
