JPS643823A - Automatic focus control system for optical disk device - Google Patents

Automatic focus control system for optical disk device

Info

Publication number
JPS643823A
JPS643823A JP15655687A JP15655687A JPS643823A JP S643823 A JPS643823 A JP S643823A JP 15655687 A JP15655687 A JP 15655687A JP 15655687 A JP15655687 A JP 15655687A JP S643823 A JPS643823 A JP S643823A
Authority
JP
Japan
Prior art keywords
automatic focus
focus control
retried
control
control part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15655687A
Other languages
English (en)
Inventor
Mikio Yuasa
Takuya Mizogami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15655687A priority Critical patent/JPS643823A/ja
Publication of JPS643823A publication Critical patent/JPS643823A/ja
Pending legal-status Critical Current

Links

Landscapes

  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
JP15655687A 1987-06-25 1987-06-25 Automatic focus control system for optical disk device Pending JPS643823A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15655687A JPS643823A (en) 1987-06-25 1987-06-25 Automatic focus control system for optical disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15655687A JPS643823A (en) 1987-06-25 1987-06-25 Automatic focus control system for optical disk device

Publications (1)

Publication Number Publication Date
JPS643823A true JPS643823A (en) 1989-01-09

Family

ID=15630376

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15655687A Pending JPS643823A (en) 1987-06-25 1987-06-25 Automatic focus control system for optical disk device

Country Status (1)

Country Link
JP (1) JPS643823A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0312825A (ja) * 1989-06-09 1991-01-21 Onkyo Corp 合焦装置および方法
JPH04141832A (ja) * 1990-10-01 1992-05-15 Mitsubishi Electric Corp 光ディスク装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0312825A (ja) * 1989-06-09 1991-01-21 Onkyo Corp 合焦装置および方法
JPH04141832A (ja) * 1990-10-01 1992-05-15 Mitsubishi Electric Corp 光ディスク装置

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