Title:
光情報記録装置、光情報記録方法、光情報記録媒体及び光ディスク製造方法
Document Type and Number:
Japanese Patent JP4040152
Kind Code:
B2
Abstract:
An optical information recording apparatus, an optical information recording method and an optical information recording medium according to the present invention enable second information such as character information, graphic information and the like to be recorded on a disk as a large laser output difference, thereby making it possible to record the second information clearly. The optical information recording apparatus comprises a modulation signal generating device (modulating circuit 4) for generating a modulation signal SB which changes in response to first information SA, a time change signal generating device (staircase generating circuit 7) for generating a time change signal SF which changes in accordance with second information SE, a light amount changing device (optical modulator 10A) for changing a light amount of laser beam in accordance with the time change signal SF and an optical modulation device (optical modulator 10B) for turning on and off a laser beam L1 obtained from the light amount changing device 10A in accordance with the modulation signal SB and wherein the light amount of laser beam is changed slowly by the second information SE.
Inventors:
Seiji Kobayashi
Kale Roderick
Kale Roderick
Application Number:
JP34753297A
Publication Date:
January 30, 2008
Filing Date:
December 17, 1997
Export Citation:
Assignee:
ソニー株式会社
International Classes:
G11B7/00; G11B7/24; G11B7/0045; G11B7/125; G11B7/26; G11B23/40
Domestic Patent References:
| JP636514A | ||||
| JP7320274A | ||||
| JP877618A | ||||
| JP9312021A | ||||
| JP5135363A | ||||
| JP6131669A |
Attorney, Agent or Firm:
Yoshitsuno Kakuda
Hitoshi Ito
Hitoshi Ito