Title:
【発明の名称】光学的情報記録再生装置
Document Type and Number:
Japanese Patent JP3095546
Kind Code:
B2
Abstract:
A minute light spot is irradiated on an information track on a recording surface of a recording medium from an optical head. When reproducing an information mark train recorded on the recording surface by the mark position recording method, light reflected by or transmitted through the recording medium is guided to a divided photosensor having a division line extending in a direction perpendicular to the track. A plurality of outputs from the divided photosensor is arithmetically processed to thereby detect the central position of the information mark.
Inventors:
Hiroaki Hoshi
Masakuni Yamamoto
Eiji Yamaguchi
Susumu Matsumura
Masakuni Yamamoto
Eiji Yamaguchi
Susumu Matsumura
Application Number:
JP26689892A
Publication Date:
October 03, 2000
Filing Date:
September 10, 1992
Export Citation:
Assignee:
Canon Inc
International Classes:
G11B7/00; G11B7/005; G11B7/135; G11B11/10; G11B11/105; G11B19/12; (IPC1-7): G11B7/005; G11B7/135; G11B11/105
Domestic Patent References:
| JP246544A | ||||
| JP63313335A | ||||
| JP59207434A | ||||
| JP4155640A | ||||
| JP59132430A | ||||
| JP62187418U |
Attorney, Agent or Firm:
Johei Yamashita