JPS5470002A - Optical information reader - Google Patents

Optical information reader

Info

Publication number
JPS5470002A
JPS5470002A JP13697277A JP13697277A JPS5470002A JP S5470002 A JPS5470002 A JP S5470002A JP 13697277 A JP13697277 A JP 13697277A JP 13697277 A JP13697277 A JP 13697277A JP S5470002 A JPS5470002 A JP S5470002A
Authority
JP
Japan
Prior art keywords
optical fiber
disc
semiconductor laser
photo detectors
signal light
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
JP13697277A
Other languages
Japanese (ja)
Inventor
Akiya Goto
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
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP13697277A priority Critical patent/JPS5470002A/en
Publication of JPS5470002A publication Critical patent/JPS5470002A/en
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
    • G11B7/13—Optical detectors therefor
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)

Abstract

PURPOSE:To achieve the miniaturization of pickup head part by using optical fibers for transmission and reception of signal light. CONSTITUTION:A semiconductor laser 2 as a light source, photo detectors 8, 12, a feedback circuit 14 for output stabilization, a driving circuit 13 are disposed in positions away from a disc 1. A signal light transmitting-receiving optical fiber 61, optical fiber 66 are disposed between the semiconductor laser 2, photo detectors 8, 12 and disc 1 while a directional coupler 11 is being constituted. This causes the signal light tramsmitting-receiving optical fiber 61 to act as a pickup heat part, the pickup head part to be made smaller in size and lighter in weight, the read light beam from the semiconductor laser 2 and the reflected light beam having been modulated by the disc 1 to be transmitted through the optical fiber 61 and part thereof to be transmitted to the photo detectors 8, 12 through the optical fiber 66.
JP13697277A 1977-11-15 1977-11-15 Optical information reader Pending JPS5470002A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13697277A JPS5470002A (en) 1977-11-15 1977-11-15 Optical information reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13697277A JPS5470002A (en) 1977-11-15 1977-11-15 Optical information reader

Publications (1)

Publication Number Publication Date
JPS5470002A true JPS5470002A (en) 1979-06-05

Family

ID=15187768

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13697277A Pending JPS5470002A (en) 1977-11-15 1977-11-15 Optical information reader

Country Status (1)

Country Link
JP (1) JPS5470002A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039836A2 (en) * 1980-05-12 1981-11-18 Northern Telecom Limited A scanning head for an optical disc system
JPS62217434A (en) * 1986-03-18 1987-09-24 Fujitsu Ltd Waveguide type optical head
JP2012128941A (en) * 2010-12-16 2012-07-05 Headway Technologies Inc Thermal assist magnetic recording head, integrated optical intensity measurement element and adjustment method of plasmon wave intensity

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039836A2 (en) * 1980-05-12 1981-11-18 Northern Telecom Limited A scanning head for an optical disc system
EP0039836A3 (en) * 1980-05-12 1982-05-19 Northern Telecom Limited A scanning head for an optical disc system
JPS62217434A (en) * 1986-03-18 1987-09-24 Fujitsu Ltd Waveguide type optical head
JP2012128941A (en) * 2010-12-16 2012-07-05 Headway Technologies Inc Thermal assist magnetic recording head, integrated optical intensity measurement element and adjustment method of plasmon wave intensity

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