Title:
DEVICE AND METHOD FOR ADJUSTING GAIN OF FOCUS SERVO SYSTEM OF OPTICAL DISK DEVICE
Document Type and Number:
Japanese Patent JPH0612690
Kind Code:
A
Abstract:
PURPOSE: To improve the accuracy of the gain adjustment of a focus servo system at the time of adjusting an optical disk device.
CONSTITUTION: In the adjustment of the focus servo systems 5-10 of the optical disk device, the measurement data or a proofreading value for adjusting based on the measurement data of the width of the step difference 11 of a disk 1 is recorded previously. The value is read by a proofreading value read means 102 and compared with the peak value of a focus error detection signal and the gain of a gain amplifier 7 is adjusted.
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Inventors:
NAKATSU KEIJI
KOBAYASHI TOSHIYUKI
KOBAYASHI TOSHIYUKI
Application Number:
JP17234292A
Publication Date:
January 21, 1994
Filing Date:
June 30, 1992
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
G02B7/28; G11B7/095; H03G3/20; (IPC1-7): G11B7/095; G02B7/28
Attorney, Agent or Firm:
Takada Mamoru
Next Patent: スパイラル型発熱体