FORMATTER DRIVING CLOCK GENERATION METHOD AND DEVICE, DRIVING CLOCK GENERATION DEVICE, MASTER OPTICAL DISK EXPOSING METHOD AND DEVICE, OPTICAL DISK DRIVING DEVICE, AND MASTER OPTICAL DISK AND INFORMATION RECORDING MEDIUM PRODUCED THEREBY

摘要

PROBLEM TO BE SOLVED: To obtain a master optical disk and an information recording medium by strictly and exactly obtaining a formatter driving clock realizing a CAV driven CLV format by the calculation and forming an information track by the exposure using the above result.;SOLUTION: In this master optical disk exposing device, the exposure is carried out with the CAV driving operation by a rotation driving means such as a driving motor 8 for rotating a turntable T mounting a glass original disk 5 of the optical disk thereon, an encoder 7, a converging/exposing means such as an optical exposure system 2 for irradiating the information track with converging a light beam, a focus actuator 4, a horizontally forwarding means such as an air slider motor 10 for making a converging/irradiating means of the light beam to traverse in a plane parallel with the glass original disk 5, a motor driver 11, and a control of the rotation driving means and horizontally forwarding drive means. In the device, further, the formatter driving clock is strictly and exactly obtained by the calculation from a rotational angular velocity ω₀ of turntable, a CLV driving start radius R₀ and a track pitch P, then the information track of the CAV driven CLV format is formed on the glass original disk 5.;COPYRIGHT: (C)2005,JPO&NCIPI