Title:
【発明の名称】マルチディスク再生可能な光ディスク記録再生装置でリードインタイム最小化方法
Document Type and Number:
Japanese Patent JP2911823
Kind Code:
B2
Abstract:
A method for rapidly implementing the data processing for an optical disk in an optical disk recording or reproducing apparatus capable of reproducing data from multiple types of disks. The method includes the steps of turning on a laser of a pickup device, setting the pickup device at an initial position, and driving a timer; obtaining a minimum tracking error point from an optical disk while vertically moving the pickup device from the initial position to the optical disk at a constant velocity; detecting a thickness of the optical disk from a value of the timer at the time when the minimum tracking error point is obtained and from the constant velocity during the vertical movement of the pickup device; obtaining minimum tracking error points between tracks on the optical disk while horizontally moving the pickup device at a constant velocity, at the time when the minimum tracking error point is obtained; detecting a pitch size between the tracks from a period between the minimum tracking error points and from the constant velocity during the horizontal movement of the pickup device; and discriminating the type of disk from the detected thickness of the optical disk and the detected pitch size between the tracks.
Inventors:
TEI TEIJU
Application Number:
JP16780696A
Publication Date:
June 23, 1999
Filing Date:
June 27, 1996
Export Citation:
Assignee:
SANSEI DENSHI KK
International Classes:
G11B19/02; G11B7/00; G11B7/0037; G11B7/0045; G11B7/09; G11B19/00; G11B19/12; G11B27/36; (IPC1-7): G11B19/12
Domestic Patent References:
| JPH0636517A | ||||
| JPH0676460A | ||||
| JPH04157635A | ||||
| JPH06318323A |
Attorney, Agent or Firm:
Tadahiko Ito (1 outside)