JPS5744241A - Magnetooptic reproducer - Google Patents

Magnetooptic reproducer

Info

Publication number
JPS5744241A
JPS5744241A JP11879680A JP11879680A JPS5744241A JP S5744241 A JPS5744241 A JP S5744241A JP 11879680 A JP11879680 A JP 11879680A JP 11879680 A JP11879680 A JP 11879680A JP S5744241 A JPS5744241 A JP S5744241A
Authority
JP
Japan
Prior art keywords
polarized
rotation
angle
splitter
transmissivity
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
JP11879680A
Other languages
Japanese (ja)
Other versions
JPS6110888B2 (en
Inventor
Masahiro Orukawa
Hideji Kawabata
Akira Muto
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 JP11879680A priority Critical patent/JPS5744241A/en
Publication of JPS5744241A publication Critical patent/JPS5744241A/en
Publication of JPS6110888B2 publication Critical patent/JPS6110888B2/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
    • G11B11/00—Recording 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
    • G11B11/10—Recording 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
    • G11B11/105—Recording 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 thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing

Abstract

PURPOSE:To increase the angle of rotation on a polarized surface and enhance the S/N, by providing a beam splitter having different reflectance and transmissivity between the P and S polarized beams on an optical path between a linear polarized light source and a magnetic recording medium. CONSTITUTION:The P polarized beam emitted from a linear polarized light source 1 is condensed on a magnetooptic recording medium 4 by a condenser lens 3 and via a beam splitter 2. The splitter 2 has the 83% transmissivity and 17% reflectance for the P polarized beam plus the 17% transmissivity and 83% reflectance for the S polarized beam, respectively. The reflected light given from an MnBi recording medium of 1.5 deg.Kerr angle of rotation is turned into an angle of rotation of about 6 deg. via the splitter 2, separated to the normal and abnormal beams through a wallastone prism 5 and receives the differential detection via light receivers 6 and 6' plus a differential amplifier 7. As a result, the angle of rotation is increased on the polarizing surface to enhance the S/N.
JP11879680A 1980-08-27 1980-08-27 Magnetooptic reproducer Granted JPS5744241A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11879680A JPS5744241A (en) 1980-08-27 1980-08-27 Magnetooptic reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11879680A JPS5744241A (en) 1980-08-27 1980-08-27 Magnetooptic reproducer

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP22855189A Division JPH02126450A (en) 1989-09-04 1989-09-04 Magneto-optical reproducing device

Publications (2)

Publication Number Publication Date
JPS5744241A true JPS5744241A (en) 1982-03-12
JPS6110888B2 JPS6110888B2 (en) 1986-03-31

Family

ID=14745315

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11879680A Granted JPS5744241A (en) 1980-08-27 1980-08-27 Magnetooptic reproducer

Country Status (1)

Country Link
JP (1) JPS5744241A (en)

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57205840A (en) * 1981-06-10 1982-12-17 Canon Inc Vertical magnetic recording and reproducing device
JPS5877047A (en) * 1981-10-29 1983-05-10 Sharp Corp Magnetooptic head
JPS5877048A (en) * 1981-10-30 1983-05-10 Pioneer Electronic Corp Reader for photomagnetic recording and reproducing system
JPS58122633A (en) * 1982-01-18 1983-07-21 Sharp Corp Optical device
JPS58175149A (en) * 1982-04-07 1983-10-14 Hitachi Ltd Optical pickup device
JPS58189612A (en) * 1982-04-28 1983-11-05 Canon Inc Optical reading system of recording pattern
JPS5977649A (en) * 1982-10-26 1984-05-04 Sanyo Electric Co Ltd Reproducing device of photomagnetic disc
JPS5992457A (en) * 1982-11-17 1984-05-28 Matsushita Electric Ind Co Ltd Optical reproducer
JPS59154659A (en) * 1983-02-24 1984-09-03 Fujitsu Ltd Optomagnetic recording and reproducing device
JPS59177748A (en) * 1983-03-28 1984-10-08 Fujitsu Ltd Optomagnetic recording and reproducing device
JPS59203259A (en) * 1983-05-04 1984-11-17 Sanyo Electric Co Ltd Optical magnetic disc device
EP0141679A2 (en) * 1983-11-08 1985-05-15 Sharp Kabushiki Kaisha Optical system in a magneto-optical memory device
JPS6082728U (en) * 1983-11-10 1985-06-07 三洋電機株式会社 information reading device
JPS60108189A (en) * 1983-11-17 1985-06-13 Toyota Motor Corp Laser butt welding method
JPS60129953A (en) * 1983-12-16 1985-07-11 Fujitsu Ltd Photomagnetic recording and reproducing device
JPS60129954A (en) * 1983-12-19 1985-07-11 Matsushita Electric Ind Co Ltd Photomagnetic disk recorder
JPS60187955A (en) * 1984-03-07 1985-09-25 Yokogawa Hokushin Electric Corp Photomagnetic disk device
US4558440A (en) * 1982-08-19 1985-12-10 Canon Kabushiki Kaisha System for recording patterns of magnetically recorded information by utilizing the magneto-optic effect
US4561032A (en) * 1981-06-02 1985-12-24 Canon Kabushiki Kaisha Magnetooptic reproducing device
FR2569072A1 (en) * 1984-05-25 1986-02-14 Thomson Csf Magneto-optic reading system
JPS63282939A (en) * 1987-05-15 1988-11-18 Seiko Epson Corp Optical pick-up
JPS6413243A (en) * 1987-07-06 1989-01-18 Seiko Epson Corp Optical pickup
JPH01319145A (en) * 1988-06-20 1989-12-25 Hitachi Maxell Ltd Optical recording medium driving device
JPH04228136A (en) * 1991-04-26 1992-08-18 Sharp Corp Optical device
JPH0620323A (en) * 1992-06-29 1994-01-28 Canon Inc Optical system for reading recording pattern
US5416755A (en) * 1985-02-28 1995-05-16 Canon Kabushiki Kaisha Optical pickup using split beams impinging on different photo-detector areas
US5444677A (en) * 1992-03-03 1995-08-22 Omron Corporation Optical read/write head low angle beamsplitter and coplanar detectors
JPH08212615A (en) * 1995-12-13 1996-08-20 Sharp Corp Optical device of magneto-optical storage device
US5661701A (en) * 1985-02-28 1997-08-26 Canon Kabushiki Kaisha Optical pickup using split beams impinging on different photodetector areas
US6236366B1 (en) 1996-09-02 2001-05-22 Olympus Optical Co., Ltd. Hermetically sealed semiconductor module composed of semiconductor integrated circuit and antenna element

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5558834A (en) * 1978-10-27 1980-05-01 Fujitsu Ltd Optical readout method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5558834A (en) * 1978-10-27 1980-05-01 Fujitsu Ltd Optical readout method

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561032A (en) * 1981-06-02 1985-12-24 Canon Kabushiki Kaisha Magnetooptic reproducing device
JPS57205840A (en) * 1981-06-10 1982-12-17 Canon Inc Vertical magnetic recording and reproducing device
JPS5877047A (en) * 1981-10-29 1983-05-10 Sharp Corp Magnetooptic head
JPS5877048A (en) * 1981-10-30 1983-05-10 Pioneer Electronic Corp Reader for photomagnetic recording and reproducing system
JPH0327978B2 (en) * 1981-10-30 1991-04-17 Pioneer Electronic Corp
JPS58122633A (en) * 1982-01-18 1983-07-21 Sharp Corp Optical device
JPS58175149A (en) * 1982-04-07 1983-10-14 Hitachi Ltd Optical pickup device
JPH0580055B2 (en) * 1982-04-07 1993-11-05 Hitachi Ltd
JPH0526173B2 (en) * 1982-04-28 1993-04-15 Canon Kk
JPS58189612A (en) * 1982-04-28 1983-11-05 Canon Inc Optical reading system of recording pattern
US4558440A (en) * 1982-08-19 1985-12-10 Canon Kabushiki Kaisha System for recording patterns of magnetically recorded information by utilizing the magneto-optic effect
JPS5977649A (en) * 1982-10-26 1984-05-04 Sanyo Electric Co Ltd Reproducing device of photomagnetic disc
JPS5992457A (en) * 1982-11-17 1984-05-28 Matsushita Electric Ind Co Ltd Optical reproducer
JPS59154659A (en) * 1983-02-24 1984-09-03 Fujitsu Ltd Optomagnetic recording and reproducing device
JPS59177748A (en) * 1983-03-28 1984-10-08 Fujitsu Ltd Optomagnetic recording and reproducing device
JPS59203259A (en) * 1983-05-04 1984-11-17 Sanyo Electric Co Ltd Optical magnetic disc device
EP0141679A2 (en) * 1983-11-08 1985-05-15 Sharp Kabushiki Kaisha Optical system in a magneto-optical memory device
JPS6082728U (en) * 1983-11-10 1985-06-07 三洋電機株式会社 information reading device
JPS60108189A (en) * 1983-11-17 1985-06-13 Toyota Motor Corp Laser butt welding method
JPS60129953A (en) * 1983-12-16 1985-07-11 Fujitsu Ltd Photomagnetic recording and reproducing device
JPS60129954A (en) * 1983-12-19 1985-07-11 Matsushita Electric Ind Co Ltd Photomagnetic disk recorder
JPH0522305B2 (en) * 1983-12-19 1993-03-29 Matsushita Electric Ind Co Ltd
JPS60187955A (en) * 1984-03-07 1985-09-25 Yokogawa Hokushin Electric Corp Photomagnetic disk device
FR2569072A1 (en) * 1984-05-25 1986-02-14 Thomson Csf Magneto-optic reading system
US5416755A (en) * 1985-02-28 1995-05-16 Canon Kabushiki Kaisha Optical pickup using split beams impinging on different photo-detector areas
US5488598A (en) * 1985-02-28 1996-01-30 Canon Kabushiki Kaisha Optical pickup using split beams impinging on different photodetector areas
US5661701A (en) * 1985-02-28 1997-08-26 Canon Kabushiki Kaisha Optical pickup using split beams impinging on different photodetector areas
JPS63282939A (en) * 1987-05-15 1988-11-18 Seiko Epson Corp Optical pick-up
JPS6413243A (en) * 1987-07-06 1989-01-18 Seiko Epson Corp Optical pickup
JPH01319145A (en) * 1988-06-20 1989-12-25 Hitachi Maxell Ltd Optical recording medium driving device
JPH04228136A (en) * 1991-04-26 1992-08-18 Sharp Corp Optical device
US5444677A (en) * 1992-03-03 1995-08-22 Omron Corporation Optical read/write head low angle beamsplitter and coplanar detectors
JPH0620323A (en) * 1992-06-29 1994-01-28 Canon Inc Optical system for reading recording pattern
JPH08212615A (en) * 1995-12-13 1996-08-20 Sharp Corp Optical device of magneto-optical storage device
US6236366B1 (en) 1996-09-02 2001-05-22 Olympus Optical Co., Ltd. Hermetically sealed semiconductor module composed of semiconductor integrated circuit and antenna element

Also Published As

Publication number Publication date
JPS6110888B2 (en) 1986-03-31

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