| 摘要 |
PURPOSE:To exactly reproduce recording information by facilitating tap. management control in a reproducing device even in the case of ultra-resolution reproduction by utilizing the temp. distribution on an optical disk. CONSTITUTION:This optical disk has plural recording tracks and is provided with data information regions ADT for data information recording within the respective recording tracks and servo control information regions ASV for servo information recording. The ultra-resolution reproduction is executed while reproducing regions and mask regions are formed by reading out light. The optical disk of a sampled servo system for this purpose is provided with heat shielding GG for suppressing the heat transmission between the adjacent recording tracks at least between the recording tracks of the data information regions ADT. At least the data information regions ADT are provided with the heat shielding zones GG in nearly parallel with the center lines of the recording tracks apart by the distance nearly equal to the wobble quantities of wobble pits WP1, WP2 for tracking servo formed in the servo control information regions ASV. |
