| 摘要 |
PROBLEM TO BE SOLVED: To perform high-speed and highly reliable recording by performing control to change the energy per one channel bit of a light irradiating an optical disk according to a linear speed. SOLUTION: This optical disk device is the one for recording/reproducing information by forming recording pits at a constant linear density, and includes a VCO 7, a recording signal generating means 8, a laser driving means 9 and a controller 10 as a control means. The VCO 7 produces a reference clock having a higher frequency as a linear speed increases in proportion to the linear speed of an optical disk l. The recording signal generating means 8 outputs a data signal in synchronization with the reference clock from the VCO 7, and the laser driving means 9 produces a light source according to the output of the recording signal generating means 8. The controller 10 performs, for forming pits from the light source, control so as to increase the energy per one channel bit of a light projected to the optical disk 1 as a linear speed seen in the position of an optical head 2 is larger and make the size of a bit optimal. |
