JPS56163531A - Optical information recorder and reproducer - Google Patents

Optical information recorder and reproducer

Info

Publication number
JPS56163531A
JPS56163531A JP6568880A JP6568880A JPS56163531A JP S56163531 A JPS56163531 A JP S56163531A JP 6568880 A JP6568880 A JP 6568880A JP 6568880 A JP6568880 A JP 6568880A JP S56163531 A JPS56163531 A JP S56163531A
Authority
JP
Japan
Prior art keywords
medium
paths
reproduction
information
light beams
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
JP6568880A
Other languages
English (en)
Other versions
JPS6235169B2 (ja
Inventor
Akinori Watabe
Kikuji Kato
Hiroo Ukita
Susumu Yonezawa
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP6568880A priority Critical patent/JPS56163531A/ja
Publication of JPS56163531A publication Critical patent/JPS56163531A/ja
Publication of JPS6235169B2 publication Critical patent/JPS6235169B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
JP6568880A 1980-05-16 1980-05-16 Optical information recorder and reproducer Granted JPS56163531A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6568880A JPS56163531A (en) 1980-05-16 1980-05-16 Optical information recorder and reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6568880A JPS56163531A (en) 1980-05-16 1980-05-16 Optical information recorder and reproducer

Publications (2)

Publication Number Publication Date
JPS56163531A true JPS56163531A (en) 1981-12-16
JPS6235169B2 JPS6235169B2 (ja) 1987-07-31

Family

ID=13294189

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6568880A Granted JPS56163531A (en) 1980-05-16 1980-05-16 Optical information recorder and reproducer

Country Status (1)

Country Link
JP (1) JPS56163531A (ja)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57181441A (en) * 1981-04-21 1982-11-08 Philips Nv Recorder and reader for optical recording carrier
JPS58196633A (ja) * 1982-05-12 1983-11-16 Nec Corp ダブル・ビ−ム・光学ヘツド
JPS60173729A (ja) * 1984-01-26 1985-09-07 Nippon Telegr & Teleph Corp <Ntt> 光ヘツド
JPS6122449A (ja) * 1984-07-10 1986-01-31 Matsushita Electric Ind Co Ltd 光学的ピツクアツプ
JPS61111035U (ja) * 1984-12-24 1986-07-14
JPS62132246A (ja) * 1985-12-04 1987-06-15 Pioneer Electronic Corp ３ビ−ム方式光ピツクアツプ装置
JPS62212941A (ja) * 1986-03-12 1987-09-18 Olympus Optical Co Ltd 分離型の光学式ピツクアツプ
JPS6332313U (ja) * 1986-08-14 1988-03-02
JP2009151900A (ja) * 2007-12-21 2009-07-09 Sony Corp 光ディスク装置及び位置制御方法並びに光ピックアップ

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57181441A (en) * 1981-04-21 1982-11-08 Philips Nv Recorder and reader for optical recording carrier
JPH0467261B2 (ja) * 1981-04-21 1992-10-27 Fuiritsupusu Furuuiranpenfuaburiken Nv
JPS58196633A (ja) * 1982-05-12 1983-11-16 Nec Corp ダブル・ビ−ム・光学ヘツド
JPH0512772B2 (ja) * 1982-05-12 1993-02-18 Nippon Electric Co
JPS60173729A (ja) * 1984-01-26 1985-09-07 Nippon Telegr & Teleph Corp <Ntt> 光ヘツド
JPS6122449A (ja) * 1984-07-10 1986-01-31 Matsushita Electric Ind Co Ltd 光学的ピツクアツプ
JPS61111035U (ja) * 1984-12-24 1986-07-14
JPS62132246A (ja) * 1985-12-04 1987-06-15 Pioneer Electronic Corp ３ビ−ム方式光ピツクアツプ装置
JPS62212941A (ja) * 1986-03-12 1987-09-18 Olympus Optical Co Ltd 分離型の光学式ピツクアツプ
JPS6332313U (ja) * 1986-08-14 1988-03-02
JP2009151900A (ja) * 2007-12-21 2009-07-09 Sony Corp 光ディスク装置及び位置制御方法並びに光ピックアップ

Also Published As

Publication number Publication date
JPS6235169B2 (ja) 1987-07-31

Similar Documents

Publication Publication Date Title
US5303224A (en) Optical pickup, optical information recording carrier and recording and reproducing apparatus thereof
JPS57130240A (en) Optical information recording and reproducing device and information recording medium for it
JPS5647933A (en) Optical signal head
JPS56153540A (en) Optical disc device
US4963464A (en) Optical medium having pits of different depths, and method and apparatus for reproducing information therefrom
JPS5753832A (en) Method and device for recording of optical information
ATE9741T1 (de) Brennpunktdetektor.
EP0379363A3 (en) Optical head device for use in optical disk system
JPS56163531A (en) Optical information recorder and reproducer
JPS57172306A (en) Focus controller of optical recording system
JPS55101142A (en) Focus detection unit of optical reproducing device
JPS5538663A (en) Detector for recording medium of optical information reader
JPS56156937A (en) Optical pickup device
JPS57189348A (en) Auto-focus system of optical disk
JPS6452240A (en) Magneto-optical recording and reproducing device
JPH05273491A (ja) 光検知装置
JPS6232532B2 (ja)
JPS54116904A (en) Optical information reader
JPS54103307A (en) Optical recorder-reproducer
JPS57203233A (en) Optical recorder and reproducer
JPS6413246A (en) Optical head for magneto-optical storage
JPS56148742A (en) Optical information reproduction system
JPS5532248A (en) Optical recorder and reproducing device
JPS57135326A (en) Photodetecting device
JPS57109135A (en) Optical information recorder and reproducer