OPTICAL DISK AND INFORMATION RECORDING METHOD

Title:

OPTICAL DISK AND INFORMATION RECORDING METHOD

Document Type and Number:

Japanese Patent JP2001273637

Kind Code:

A

Abstract:

To deal with the increase of a recording capacity by securing the sufficient number of times of power adjusting.

A power calibration area composed of a test area for test writing and a count area for recording the used state of the test area is provided in the disk inner peripheral position of an optical disk, and information is recorded while calibrating laser power. In this case, the total number of test areas in the entire disk is increased in proportion to the increase of an optical disk capacity. For example, in the case of an optical disk corresponding to a double density CD format, the total number of test areas is set in the range of 800 to 1200. In addition, a sufficient data domain is secured by setting the size of each test to a minimum, and the number of count areas to a necessary minimum.

Inventors:

KAWASHIMA TETSUJI
TSUKADA HIROSHI
MIYAKE KUNIHIKO
OTA SHINJI
SHIOZAWA MASAZUMI

Application Number:

JP2000093007A

Publication Date:

October 05, 2001

Filing Date:

March 28, 2000

Export Citation:

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Assignee:

SONY CORP

International Classes:

G11B20/12; G11B7/0045; G11B7/007; G11B7/125; G11B7/126; G11B7/30; (IPC1-7): G11B7/0045; G11B7/30; G11B20/12

Attorney, Agent or Firm:

Akira Koike (2 outside)

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