GB2139784B - Optical information processing apparatus - Google Patents

Optical information processing apparatus

Info

Publication number
GB2139784B
GB2139784B GB08407780A GB8407780A GB2139784B GB 2139784 B GB2139784 B GB 2139784B GB 08407780 A GB08407780 A GB 08407780A GB 8407780 A GB8407780 A GB 8407780A GB 2139784 B GB2139784 B GB 2139784B
Authority
GB
United Kingdom
Prior art keywords
processing apparatus
information processing
optical information
optical
processing
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
GB08407780A
Other versions
GB8407780D0 (en
GB2139784A (en
Inventor
Masamichi Tateoka
Mitsuhiro Tokuhara
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.)
Canon Inc
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
Publication of GB8407780D0 publication Critical patent/GB8407780D0/en
Publication of GB2139784A publication Critical patent/GB2139784A/en
Application granted granted Critical
Publication of GB2139784B publication Critical patent/GB2139784B/en
Expired 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B13/00—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for
    • G11B13/04—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties
    • G11B13/045—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties combined recording by magnetic and optic means
    • 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
    • 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
    • G11B7/0901—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 track following only
    • G11B7/0903—Multi-beam tracking systems
GB08407780A 1983-03-25 1984-03-26 Optical information processing apparatus Expired GB2139784B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5024783A JPS59177735A (en) 1983-03-25 1983-03-25 Recording and reproducing device of optical information

Publications (3)

Publication Number Publication Date
GB8407780D0 GB8407780D0 (en) 1984-05-02
GB2139784A GB2139784A (en) 1984-11-14
GB2139784B true GB2139784B (en) 1986-09-24

Family

ID=12853653

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08407780A Expired GB2139784B (en) 1983-03-25 1984-03-26 Optical information processing apparatus

Country Status (3)

Country Link
JP (1) JPS59177735A (en)
DE (1) DE3410589A1 (en)
GB (1) GB2139784B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6155876A (en) * 1984-08-27 1986-03-20 松下電器産業株式会社 Electric contact
AU600280B2 (en) * 1986-07-02 1990-08-09 Sony Corporation Apparatus for optically recording and reproducing information in record tracks on a rotatable record disc
JPH0638291B2 (en) * 1987-06-22 1994-05-18 三菱電機株式会社 Optical information recording / reproducing device
JPH0638292B2 (en) * 1987-06-23 1994-05-18 三菱電機株式会社 Optical information recording / reproducing device
US4965780A (en) * 1987-08-12 1990-10-23 Digital Equipment Corporation Magneto-optical data recording device using a wavelength and polarization-sensitive splitter
US5309416A (en) * 1988-04-26 1994-05-03 Canon Kabushiki Kaisha Method and apparatus for initializing intermediate region between tracks on magnetooptical recording medium
DE3923330A1 (en) * 1989-07-14 1991-01-24 Thomson Brandt Gmbh OPTICAL SCANNER
KR950010418B1 (en) † 1991-08-28 1995-09-16 미쯔비시덴끼 가부시끼가이샤 Optical recording & reproducing apparatus for tracking wobbling guide grovbes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8101932A (en) * 1981-04-21 1982-11-16 Philips Nv DEVICE FOR RECORDING AND READING INFORMATION TRACKS IN AN OPTICAL RECORD CARRIER.
JPS5819744A (en) * 1981-07-24 1983-02-04 Sony Corp Optical recorder and reproducer

Also Published As

Publication number Publication date
GB8407780D0 (en) 1984-05-02
GB2139784A (en) 1984-11-14
DE3410589A1 (en) 1984-10-04
JPS59177735A (en) 1984-10-08

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 20040325