JPS6243254B2 - - Google Patents

Info

Publication number
JPS6243254B2
JPS6243254B2 JP401378A JP401378A JPS6243254B2 JP S6243254 B2 JPS6243254 B2 JP S6243254B2 JP 401378 A JP401378 A JP 401378A JP 401378 A JP401378 A JP 401378A JP S6243254 B2 JPS6243254 B2 JP S6243254B2
Authority
JP
Japan
Prior art keywords
semiconductor laser
output
laser device
light
disk
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.)
Expired
Application number
JP401378A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5497055A (en
Inventor
Kazuo Okada
Mitsushige Kondo
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP401378A priority Critical patent/JPS5497055A/ja
Priority to NL7812058A priority patent/NL186121C/xx
Priority to DE7979900037T priority patent/DE2862256D1/de
Priority to PCT/JP1978/000052 priority patent/WO1979000400A1/ja
Priority to EP79900037A priority patent/EP0007902B1/en
Publication of JPS5497055A publication Critical patent/JPS5497055A/ja
Publication of JPS6243254B2 publication Critical patent/JPS6243254B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
JP401378A 1977-12-16 1978-01-17 Automatic focusing device Granted JPS5497055A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP401378A JPS5497055A (en) 1978-01-17 1978-01-17 Automatic focusing device
NL7812058A NL186121C (nl) 1977-12-16 1978-12-12 Automatisch focusseerapparaat.
DE7979900037T DE2862256D1 (en) 1977-12-16 1978-12-13 Automatic focusing system
PCT/JP1978/000052 WO1979000400A1 (en) 1977-12-16 1978-12-13 Automatic focusing system
EP79900037A EP0007902B1 (en) 1977-12-16 1979-07-16 Automatic focusing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP401378A JPS5497055A (en) 1978-01-17 1978-01-17 Automatic focusing device

Publications (2)

Publication Number Publication Date
JPS5497055A JPS5497055A (en) 1979-07-31
JPS6243254B2 true JPS6243254B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1987-09-12

Family

ID=11573077

Family Applications (1)

Application Number Title Priority Date Filing Date
JP401378A Granted JPS5497055A (en) 1977-12-16 1978-01-17 Automatic focusing device

Country Status (1)

Country Link
JP (1) JPS5497055A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63261539A (ja) * 1987-04-20 1988-10-28 Mitsubishi Electric Corp 焦点検出装置
KR20070053294A (ko) * 2004-08-23 2007-05-23 코닌클리케 필립스 일렉트로닉스 엔.브이. 매체 주사 시스템의 포커스 제어

Also Published As

Publication number Publication date
JPS5497055A (en) 1979-07-31

Similar Documents

Publication Publication Date Title
US4352981A (en) Photoelectric focus and tracking apparatus
US4363961A (en) Automatic focusing apparatus
KR0156800B1 (ko) 레이저 다이오드를 이용한 자동 초점 조절 장치
JP2633535B2 (ja) 光学ピツクアツプ装置
JPS6243254B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP2542577B2 (ja) 情報記録再生装置
EP0007902B1 (en) Automatic focusing system
JPS58159248A (ja) 光デイスク装置のトラツキングサ−ボ方式
JPS6227455B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JPS56156937A (en) Optical pickup device
JPS6258049B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP2002319699A (ja) 光学装置
JPH0275488A (ja) 自動焦点合せ装置
JPS6055890B2 (ja) 光学的情報記録再生装置
JPS63259845A (ja) 光ピツクアツプ装置
JPH0127489B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JPS63244784A (ja) 多重発光装置
JPS6250895B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JPH01150231A (ja) 光学的記録再生装置用ピックアップの光学系位置調整装置
JPH04178924A (ja) 焦点制御機構
JPH0658287B2 (ja) 半導体レ−ザの戻り光雑音測定方法
JPH02263334A (ja) 自動焦点光ピツクアツプ
JPS5443756A (en) Optically recording and reproducing apparatus
JPH0534730B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JPH05325246A (ja) 光ピックアップ