Title:
【発明の名称】光ディスク記録媒体および光ディスク装置
Document Type and Number:
Japanese Patent JP2867236
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To carry out precise and high-speed speed changing control by realizing ZCLV rotation control without using an expensive rotary encoder and to enable ZCLV rotation changing control also on a land in an optical disk having a spiral or concentric recording track. SOLUTION: In an optical disk recording medium 1 having a spiral or concentric recording track 2, at least a part of a recording track 2 has a guide groove, the information recording area of a recording medium 1 is divided into plural zones Z1-Zn in the radial direction, when the recording medium 1 is rotated at a constant angular velocity, the guide groove G is meandered in the radial direction with a prescribed frequency corresponding to each zone in each zone of the plural zones and the spatial frequency of meandering motion is made to be almost fixed for every zone.
Inventors:
SUZUKI HARUYUKI
Application Number:
JP6373896A
Publication Date:
March 08, 1999
Filing Date:
February 26, 1996
Export Citation:
Assignee:
RIKOO KK
International Classes:
G11B7/00; G11B7/004; G11B7/007; G11B7/24082; G11B7/24091; G11B7/24097; G11B19/28; (IPC1-7): G11B7/007; G11B7/00; G11B7/24; G11B19/28
Domestic Patent References:
| JP7210873A | ||||
| JP684174A | ||||
| JP9223364A |
Attorney, Agent or Firm:
Toshitaka Miyakawa