Title:
【発明の名称】可動データ媒体のための光学的トラッキング装置及び方法
Document Type and Number:
Japanese Patent JP2842822
Kind Code:
B2
Abstract:
The prerecording consists of a sequence of separate discrete flags (71) whose sectionsc (711-D,711-G) are offset by equal and opposite distances from the median axis of the track (7). A particular code is defined by each gp. of smooth sections (711) Of disc. Each prerecording flag is preceded by an auxiliary prerecording element (73) representing pref. a particular code for selective identification w.r.t. the other recorded data for synchronisation purposes. The track follower has a two-cell photodetector with measuring circuits including a differential amplifier and either sample-and-hold stages or integrating circuits with memory and sampling circuits, producing a radial tracking error signal.
Inventors:
PIEERU BERUTE
KUROODO BURIKO
JANNRUI JERAARU
KUROODO BURIKO
JANNRUI JERAARU
Application Number:
JP34144595A
Publication Date:
January 06, 1999
Filing Date:
December 27, 1995
Export Citation:
Assignee:
TOMUSON SA
International Classes:
G11B7/00; G11B7/005; G11B7/007; G11B7/09; G11B7/095; G11B7/24; G11B27/19; G11B27/30; (IPC1-7): G11B7/007; G11B7/095
Domestic Patent References:
| JP5637A | ||||
| JP5052925A | ||||
| JP5046429A |
Attorney, Agent or Firm:
Yuzo Yamazaki (2 outside)