JPS6457427A - Focus servo control system for optical disk device - Google Patents

Focus servo control system for optical disk device

Info

Publication number
JPS6457427A
JPS6457427A JP62214555A JP21455587A JPS6457427A JP S6457427 A JPS6457427 A JP S6457427A JP 62214555 A JP62214555 A JP 62214555A JP 21455587 A JP21455587 A JP 21455587A JP S6457427 A JPS6457427 A JP S6457427A
Authority
JP
Japan
Prior art keywords
focus
time
servo control
writing
reading
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.)
Granted
Application number
JP62214555A
Other languages
English (en)
Other versions
JPH0738257B2 (ja
Inventor
Shigetomo Yanagi
Masateru Sasaki
Akira Minami
Toshitaka Iwamoto
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP62214555A priority Critical patent/JPH0738257B2/ja
Priority to US07/235,496 priority patent/US5077719A/en
Priority to DE3887795T priority patent/DE3887795T2/de
Priority to EP88113952A priority patent/EP0304932B1/en
Priority to KR1019880010959A priority patent/KR910008499B1/ko
Publication of JPS6457427A publication Critical patent/JPS6457427A/ja
Publication of JPH0738257B2 publication Critical patent/JPH0738257B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

JP62214555A 1987-08-28 1987-08-28 光ディスク装置 Expired - Lifetime JPH0738257B2 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP62214555A JPH0738257B2 (ja) 1987-08-28 1987-08-28 光ディスク装置
US07/235,496 US5077719A (en) 1987-08-28 1988-08-24 Optical disk access system
DE3887795T DE3887795T2 (de) 1987-08-28 1988-08-26 Zugriffssystem für optische Platten.
EP88113952A EP0304932B1 (en) 1987-08-28 1988-08-26 Optical disk access system
KR1019880010959A KR910008499B1 (ko) 1987-08-28 1988-08-27 광 디스크 액세스 시스템

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62214555A JPH0738257B2 (ja) 1987-08-28 1987-08-28 光ディスク装置

Publications (2)

Publication Number Publication Date
JPS6457427A true JPS6457427A (en) 1989-03-03
JPH0738257B2 JPH0738257B2 (ja) 1995-04-26

Family

ID=16657663

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62214555A Expired - Lifetime JPH0738257B2 (ja) 1987-08-28 1987-08-28 光ディスク装置

Country Status (1)

Country Link
JP (1) JPH0738257B2 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101226755A (zh) * 2007-01-16 2008-07-23 三洋电机株式会社 盘装置
US8091384B2 (en) 2008-10-31 2012-01-10 Japan Super Quartz Corporation Method of manufacturing silica glass crucible for pulling silicon single crystals
US8363527B2 (en) 2007-01-16 2013-01-29 Sanyo Electric Co., Ltd. Disc apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59171035A (ja) * 1983-03-18 1984-09-27 Fujitsu Ltd 光デイスク装置におけるトラツクアクセス方式
JPS59201232A (ja) * 1983-04-27 1984-11-14 Toshiba Corp 光学式デイスクレコ−ド再生装置のフオ−カス制御回路

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59171035A (ja) * 1983-03-18 1984-09-27 Fujitsu Ltd 光デイスク装置におけるトラツクアクセス方式
JPS59201232A (ja) * 1983-04-27 1984-11-14 Toshiba Corp 光学式デイスクレコ−ド再生装置のフオ−カス制御回路

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101226755A (zh) * 2007-01-16 2008-07-23 三洋电机株式会社 盘装置
JP2009099238A (ja) * 2007-01-16 2009-05-07 Sanyo Electric Co Ltd ディスク装置およびその調整方法
US8363527B2 (en) 2007-01-16 2013-01-29 Sanyo Electric Co., Ltd. Disc apparatus
US8091384B2 (en) 2008-10-31 2012-01-10 Japan Super Quartz Corporation Method of manufacturing silica glass crucible for pulling silicon single crystals

Also Published As

Publication number Publication date
JPH0738257B2 (ja) 1995-04-26

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