JPS5223902A - Optical playback device - Google Patents

Optical playback device

Info

Publication number
JPS5223902A
JPS5223902A JP50100408A JP10040875A JPS5223902A JP S5223902 A JPS5223902 A JP S5223902A JP 50100408 A JP50100408 A JP 50100408A JP 10040875 A JP10040875 A JP 10040875A JP S5223902 A JPS5223902 A JP S5223902A
Authority
JP
Japan
Prior art keywords
playback device
optical playback
light beam
playback
optical
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
JP50100408A
Other languages
English (en)
Inventor
Akifumi Nakada
Tomio Yoshida
Masahiro Deguchi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP50100408A priority Critical patent/JPS5223902A/ja
Publication of JPS5223902A publication Critical patent/JPS5223902A/ja
Pending 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
JP50100408A 1975-08-18 1975-08-18 Optical playback device Pending JPS5223902A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50100408A JPS5223902A (en) 1975-08-18 1975-08-18 Optical playback device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50100408A JPS5223902A (en) 1975-08-18 1975-08-18 Optical playback device

Publications (1)

Publication Number Publication Date
JPS5223902A true JPS5223902A (en) 1977-02-23

Family

ID=14273139

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50100408A Pending JPS5223902A (en) 1975-08-18 1975-08-18 Optical playback device

Country Status (1)

Country Link
JP (1) JPS5223902A (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2393393A1 (fr) * 1976-11-30 1978-12-29 Sony Corp Support d'enregistrement rotatif, methode et dispositif de reproduction optique de l'information enregistree
JPS5622274A (en) * 1979-07-31 1981-03-02 Toshiba Corp Information memory system for optical disc
JPS63100629A (ja) * 1987-07-24 1988-05-02 Hitachi Ltd 光情報記録再生装置
US5600621A (en) * 1993-04-26 1997-02-04 Nippon Conlux Co., Ltd. Laser output control device for an optical information recording and reproducing apparatus
WO2003030156A1 (en) * 2001-09-27 2003-04-10 Tdk Corporation Optical recording medium, optical recording medium reproduction method, and optical recording medium reproduction apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2393393A1 (fr) * 1976-11-30 1978-12-29 Sony Corp Support d'enregistrement rotatif, methode et dispositif de reproduction optique de l'information enregistree
JPS5622274A (en) * 1979-07-31 1981-03-02 Toshiba Corp Information memory system for optical disc
JPS63100629A (ja) * 1987-07-24 1988-05-02 Hitachi Ltd 光情報記録再生装置
US5600621A (en) * 1993-04-26 1997-02-04 Nippon Conlux Co., Ltd. Laser output control device for an optical information recording and reproducing apparatus
WO2003030156A1 (en) * 2001-09-27 2003-04-10 Tdk Corporation Optical recording medium, optical recording medium reproduction method, and optical recording medium reproduction apparatus

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