JPS5956239A - Optical head - Google Patents

Optical head

Info

Publication number
JPS5956239A
JPS5956239A JP16526082A JP16526082A JPS5956239A JP S5956239 A JPS5956239 A JP S5956239A JP 16526082 A JP16526082 A JP 16526082A JP 16526082 A JP16526082 A JP 16526082A JP S5956239 A JPS5956239 A JP S5956239A
Authority
JP
Japan
Prior art keywords
optical fiber
luminous flux
condenser lens
polarized light
reflected
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
JP16526082A
Inventor
Tetsuo Kuwayama
Kazuya Matsumoto
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP16526082A priority Critical patent/JPS5956239A/en
Priority claimed from US06/533,440 external-priority patent/US4626679A/en
Publication of JPS5956239A publication Critical patent/JPS5956239A/en
Application status is Pending legal-status Critical

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1372Lenses
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermo-magnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10532Heads

Abstract

PURPOSE:To form a reading part which is small-sized and lightweight and can be moved at a high speed, by transmitting a reflected luminous flux to a detecting means by a polarization plane preserving optical fiber. CONSTITUTION:The luminous flux from a laser light source 1 is led to an optical fiber 12 by a condenser lens 22. This optical fiber is so-called a polarization plane preserving optical fiber; and when linearly polarized light having an oscillating plane in a proper direction is made incident to one end of this optical fiber, the polarized light is transmitted to the other end while keeping the oscillating plane as it is. A condenser lens 4 condenses the luminous flux onto a photomagnetic recording medium 6 through a substrate 5, and the reflected luminous flux is reflected by a beam splitter 3 and is condensed by a condenser lens 13 and is led to an optical fiber 14. This optical fiber 14 is a polarization plane preserving optical fiber to transmit a pair of beams of linearly polarized light orthogonal to each other independently of each other, and photomagnetic recording information is read out by photodetectors 10 and 11.
JP16526082A 1982-09-22 1982-09-22 Optical head Pending JPS5956239A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16526082A JPS5956239A (en) 1982-09-22 1982-09-22 Optical head

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP16526082A JPS5956239A (en) 1982-09-22 1982-09-22 Optical head
US06/533,440 US4626679A (en) 1982-09-22 1983-09-19 Optical head and method of detecting the focus thereof
DE19833334120 DE3334120C2 (en) 1982-09-22 1983-09-21

Publications (1)

Publication Number Publication Date
JPS5956239A true JPS5956239A (en) 1984-03-31

Family

ID=15808940

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16526082A Pending JPS5956239A (en) 1982-09-22 1982-09-22 Optical head

Country Status (1)

Country Link
JP (1) JPS5956239A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6064424U (en) * 1983-10-05 1985-05-07
JPH01128247A (en) * 1987-10-05 1989-05-19 Bull Sa Optical reading and magnetic writing device of information medium
WO1998009287A1 (en) * 1996-08-27 1998-03-05 Quinta Corporation Data storage system having an optical flying head
KR100607944B1 (en) * 1999-11-18 2006-08-03 삼성전자주식회사 Optical head for recording and/or reproducing and optical recording and/or reproducing apparatus by adapting it

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5627104A (en) * 1979-08-13 1981-03-16 Takayoshi Ogoshi Construction of optical fiber
JPS5668937A (en) * 1979-11-06 1981-06-09 Matsushita Electric Ind Co Ltd Optical disk reproducing device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5627104A (en) * 1979-08-13 1981-03-16 Takayoshi Ogoshi Construction of optical fiber
JPS5668937A (en) * 1979-11-06 1981-06-09 Matsushita Electric Ind Co Ltd Optical disk reproducing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6064424U (en) * 1983-10-05 1985-05-07
JPH01128247A (en) * 1987-10-05 1989-05-19 Bull Sa Optical reading and magnetic writing device of information medium
WO1998009287A1 (en) * 1996-08-27 1998-03-05 Quinta Corporation Data storage system having an optical flying head
KR100607944B1 (en) * 1999-11-18 2006-08-03 삼성전자주식회사 Optical head for recording and/or reproducing and optical recording and/or reproducing apparatus by adapting it

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