JPS61142535A - 光学式ディスク再生装置の自動焦点引込み回路 - Google Patents

光学式ディスク再生装置の自動焦点引込み回路

Info

Publication number
JPS61142535A
JPS61142535A JP26400684A JP26400684A JPS61142535A JP S61142535 A JPS61142535 A JP S61142535A JP 26400684 A JP26400684 A JP 26400684A JP 26400684 A JP26400684 A JP 26400684A JP S61142535 A JPS61142535 A JP S61142535A
Authority
JP
Japan
Prior art keywords
signal
focus
state
circuit
objective lens
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
JP26400684A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0441417B2 (enExample
Inventor
Satoru Maeda
悟 前田
Yasuhiro Hayashi
泰弘 林
Tadashi Kojima
正 小島
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP26400684A priority Critical patent/JPS61142535A/ja
Publication of JPS61142535A publication Critical patent/JPS61142535A/ja
Publication of JPH0441417B2 publication Critical patent/JPH0441417B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
JP26400684A 1984-12-14 1984-12-14 光学式ディスク再生装置の自動焦点引込み回路 Granted JPS61142535A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26400684A JPS61142535A (ja) 1984-12-14 1984-12-14 光学式ディスク再生装置の自動焦点引込み回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26400684A JPS61142535A (ja) 1984-12-14 1984-12-14 光学式ディスク再生装置の自動焦点引込み回路

Publications (2)

Publication Number Publication Date
JPS61142535A true JPS61142535A (ja) 1986-06-30
JPH0441417B2 JPH0441417B2 (enExample) 1992-07-08

Family

ID=17397235

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26400684A Granted JPS61142535A (ja) 1984-12-14 1984-12-14 光学式ディスク再生装置の自動焦点引込み回路

Country Status (1)

Country Link
JP (1) JPS61142535A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62239327A (ja) * 1986-04-09 1987-10-20 Sanyo Electric Co Ltd フオ−カスサ−チ回路

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62239327A (ja) * 1986-04-09 1987-10-20 Sanyo Electric Co Ltd フオ−カスサ−チ回路

Also Published As

Publication number Publication date
JPH0441417B2 (enExample) 1992-07-08

Similar Documents

Publication Publication Date Title
JPH0416251Y2 (enExample)
JP2706294B2 (ja) 光学的情報記録再生装置
US5107101A (en) Optical information processing apparatus with peak hold circuit for gain control signal
JPS61142535A (ja) 光学式ディスク再生装置の自動焦点引込み回路
KR100237561B1 (ko) 포커스 서보 재인입 방법 및 장치
JPS61156540A (ja) 光情報記録再生装置
JPH0736228B2 (ja) 自動焦点引き込み制御装置
KR100628184B1 (ko) 광 기록재생기의 액츄에이터 제어 장치
JP3193865B2 (ja) 光学的記録媒体のフォーカス制御装置
JPS6256577B2 (enExample)
JPS63138531A (ja) 情報再生装置
JP2863165B2 (ja) トラッキング装置
JPH0473221B2 (enExample)
JPS63140427A (ja) 高密度記録媒体デイスクトラツク位置制御装置
JPS5938933A (ja) 光学的情報読取装置におけるサ−ボ装置
JPS6047236A (ja) 光デイスクヘツドのフオ−カスサ−ボ装置
JPS6257127A (ja) 自動焦点制御方式
JPH10222868A (ja) 光ディスク装置
JPH0524568B2 (enExample)
JPS5823332A (ja) 光学式デイスク再生装置のフオ−カス状態検出制御装置
JP2004005982A (ja) 光ディスクドライブシステム
JPH0379768B2 (enExample)
JPH01150232A (ja) 焦点自動引き込み装置
JPS61158035A (ja) 光情報検出装置
JPS6180626A (ja) デイスク再生装置のフオ−カス制御回路

Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term