JPS6235168B2 - - Google Patents

Info

Publication number
JPS6235168B2
JPS6235168B2 JP56112472A JP11247281A JPS6235168B2 JP S6235168 B2 JPS6235168 B2 JP S6235168B2 JP 56112472 A JP56112472 A JP 56112472A JP 11247281 A JP11247281 A JP 11247281A JP S6235168 B2 JPS6235168 B2 JP S6235168B2
Authority
JP
Japan
Prior art keywords
light beam
photodetector
beam splitter
optical system
control signal
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
JP56112472A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5814330A (ja
Inventor
Tetsuo Hosomi
Keiichi Yoshizumi
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 JP56112472A priority Critical patent/JPS5814330A/ja
Priority to US06/397,451 priority patent/US4507766A/en
Publication of JPS5814330A publication Critical patent/JPS5814330A/ja
Publication of JPS6235168B2 publication Critical patent/JPS6235168B2/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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
    • 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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1356—Double or multiple prisms, i.e. having two or more prisms in cooperation

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)
  • Optical Head (AREA)
JP56112472A 1981-07-16 1981-07-17 光学装置 Granted JPS5814330A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP56112472A JPS5814330A (ja) 1981-07-17 1981-07-17 光学装置
US06/397,451 US4507766A (en) 1981-07-16 1982-07-12 Optical device for optically recording and reproducing information signals on an information carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56112472A JPS5814330A (ja) 1981-07-17 1981-07-17 光学装置

Publications (2)

Publication Number Publication Date
JPS5814330A JPS5814330A (ja) 1983-01-27
JPS6235168B2 true JPS6235168B2 (US08066781-20111129-C00013.png) 1987-07-31

Family

ID=14587485

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56112472A Granted JPS5814330A (ja) 1981-07-16 1981-07-17 光学装置

Country Status (2)

Country Link
US (1) US4507766A (US08066781-20111129-C00013.png)
JP (1) JPS5814330A (US08066781-20111129-C00013.png)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5971141A (ja) * 1982-10-14 1984-04-21 Mitsubishi Electric Corp 光学的信号読出し装置
JPS59214815A (ja) * 1983-05-20 1984-12-04 Minolta Camera Co Ltd レンズ交換式カメラの焦点検出装置
JPS59214816A (ja) * 1983-05-20 1984-12-04 Minolta Camera Co Ltd 焦点検出装置
JP2504734B2 (ja) * 1983-11-08 1996-06-05 シャープ株式会社 光磁気記憶装置の光学装置
JP2523469B2 (ja) * 1984-03-26 1996-08-07 松下電器産業株式会社 光学記録再生ヘツド
JPS62132242A (ja) * 1985-12-04 1987-06-15 Hitachi Ltd 光デイスク装置
JPS62192031A (ja) * 1986-02-19 1987-08-22 Olympus Optical Co Ltd 光学的記録再生装置
US4853917A (en) * 1986-04-25 1989-08-01 Canon Kabushiki Kaisha Optical tracking apparatus with photodetector disposed outside part of the effective diameter of the lens system
JPS62283425A (ja) * 1986-06-02 1987-12-09 Mitsubishi Electric Corp 信号検出装置
US4807996A (en) * 1987-07-10 1989-02-28 United Technologies Corporation Transient holographic indication analysis
EP0313682B1 (en) * 1987-10-30 1992-08-12 Ibm Deutschland Gmbh Beam-analyzer for optical storage device
JPH0249225A (ja) * 1988-05-27 1990-02-19 Canon Inc 光学的情報記録再生装置
US5172366A (en) * 1988-09-19 1992-12-15 Pioneer Electronic Corporation Optical information reproducing apparatus with selective photodetector output
US5140572A (en) * 1989-02-22 1992-08-18 Ricoh Company, Ltd. Optical pickup device having fixed and movable optical systems
JP2651454B2 (ja) * 1989-05-18 1997-09-10 株式会社アサカ マルチビーム光ディスク装置のトラッキング誤差検出部
NL9000463A (nl) * 1989-06-19 1991-01-16 Pioneer Electronic Corp Optische informatieweergeefinrichting.
US4998011A (en) * 1989-11-17 1991-03-05 Applied Magnetics Corporation Flat plate focus sensing apparatus
US5172356A (en) * 1990-06-07 1992-12-15 Ricoh Company, Ltd. Separation type optical pickup device
GB2248989B (en) * 1990-10-15 1995-05-24 Applied Magnetics Corp Focus sensing apparatus and method
US5245174A (en) * 1990-10-15 1993-09-14 Applied Magnetics Corporation Focus sensing apparatus utilizing a reflecting surface having variable reflectivity
US5331622A (en) * 1991-05-28 1994-07-19 Applied Magnetics Corporation Compact optical head
US5646778A (en) * 1991-05-28 1997-07-08 Discovision Associates Optical beamsplitter
JPH06309690A (ja) * 1993-04-26 1994-11-04 Sony Corp 光ピックアップ
JP2004227657A (ja) * 2003-01-22 2004-08-12 Sharp Corp 光ピックアップ装置および光ディスク装置
US20110051587A1 (en) * 2009-08-25 2011-03-03 Jinn-Kang Wang Structure For Optical Pickup Head

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE7405076L (sv) * 1974-04-16 1975-10-17 Erik Gerhard Natanel Westberg Optiskt massdataminne.
JPS55129940A (en) * 1979-03-23 1980-10-08 Teac Co Optical type reproducing device
US4408314A (en) * 1980-02-29 1983-10-04 Tokyo Shibaura Denki Kabushiki Kaisha Record/playback track tracking servo

Also Published As

Publication number Publication date
US4507766A (en) 1985-03-26
JPS5814330A (ja) 1983-01-27

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