Title:
RECORDING CONDITION CONTROL METHOD, RECORDING CONDITION CONTROLLER IN OPTICAL STORAGE DEVICE AND OPTICAL RECORDING MEDIUM
Document Type and Number:
Japanese Patent JP3311679
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To surely obtain an optimum recording condition even in a magnetic field modulated recording in which only the width of a recorded mark is changed by recording the signal quantity and the recording condition of a read signal while relating them to each other and determining the recording condition corresponding to a signal quantity which is the nearest to a prescribed quantity to the optimum recording condition.
SOLUTION: In the control of recording conditions, a CPU (an optimum recording condition determining means and a control means) 46 resords a forward pattern and a backward pattern with a control instruction c4 while sequentially increasing a recording light quantity with a control instruction c3 and moving a light beam to a prescribed track and an adjacent track with a control instruction c1. Moreover, the CPU 46 detects the signal amplitude of a read signal r2 based on a digital value to be inputted by setting the light beam b1 to a reproduction light quantity with a control instruction c2. Then, the CPU 46 sequentially stores the signal amplitudes for every recording light quantity to determine a recording light quantity in which the signal amplitude becomes the maximum value to the optimum recording light quantity.
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| JPH02134740 | OPTICAL INFORMATION RECORDING MEDIUM |
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Inventors:
Hiroshi Fuji
Tetsuya Okumura
Shigeki Maeda
Tetsuya Okumura
Shigeki Maeda
Application Number:
JP17740298A
Publication Date:
August 05, 2002
Filing Date:
June 24, 1998
Export Citation:
Assignee:
Sharp Corporation
International Classes:
G11B11/10; G11B7/125; G11B11/105; (IPC1-7): G11B11/105; G11B7/125
Domestic Patent References:
| JP319162A | ||||
| JP10134354A | ||||
| JP1083536A | ||||
| JP10334531A |
Attorney, Agent or Firm:
Kenzo Hara