FR2060935A5 - - Google Patents

Info

Publication number
FR2060935A5
FR2060935A5 FR7032139A FR7032139A FR2060935A5 FR 2060935 A5 FR2060935 A5 FR 2060935A5 FR 7032139 A FR7032139 A FR 7032139A FR 7032139 A FR7032139 A FR 7032139A FR 2060935 A5 FR2060935 A5 FR 2060935A5
Authority
FR
France
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
FR7032139A
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of FR2060935A5 publication Critical patent/FR2060935A5/fr
Expired 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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
    • 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
    • G11B11/10532—Heads
    • G11B11/10541—Heads for reproducing
    • G11B11/10543—Heads for reproducing using optical beam of radiation
    • G11B11/10547—Heads for reproducing using optical beam of radiation interacting with the magnetisation of an intermediate transfer element, e.g. magnetic film, included in the head
FR7032139A 1969-09-29 1970-08-10 Expired FR2060935A5 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US86182669A 1969-09-29 1969-09-29

Publications (1)

Publication Number Publication Date
FR2060935A5 true FR2060935A5 (fr) 1971-06-18

Family

ID=25336874

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7032139A Expired FR2060935A5 (fr) 1969-09-29 1970-08-10

Country Status (4)

Country Link
US (1) US3629517A (fr)
DE (1) DE2047393A1 (fr)
FR (1) FR2060935A5 (fr)
GB (1) GB1303694A (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3720923A (en) * 1971-07-06 1973-03-13 Honeywell Inc Optical memory with reference channel to compensate for deterioration
US3739359A (en) * 1971-08-25 1973-06-12 Du Pont Magnetic buffer storage
US4125860A (en) * 1975-06-16 1978-11-14 Nippon Telegraph And Telephone Public Corporation Reproducer for an eraseable videodisc
DE2634243A1 (de) * 1976-07-30 1978-02-02 Bosch Gmbh Robert System zur aufzeichnung und/oder wiedergabe von signalen mittels strahlen
US4101947A (en) * 1976-10-04 1978-07-18 Eastman Kodak Company Narrow track magnetic-head recorder
GB2120000B (en) * 1982-04-28 1986-04-09 Tdk Corp Magnetic recording and reproduction
US4962492A (en) * 1988-04-29 1990-10-09 Laser Magnetic Storage International Company Magneto-optic data recording system, actuating device therefor and method of providing same
US10802085B2 (en) * 2018-12-11 2020-10-13 Vulcan Inc. Magneto optic disk imager

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2929670A (en) * 1952-10-22 1960-03-22 Ibm Apparatus for producing magnetic records on tape
NL276507A (fr) * 1961-04-03
US3314052A (en) * 1963-04-12 1967-04-11 Ibm Light modulation system
US3425770A (en) * 1965-12-01 1969-02-04 Technical Operations Inc Superimposed photostorage and separation
US3408143A (en) * 1965-12-01 1968-10-29 Technical Operations Inc Storage and readout of multiple interlaced images
US3480933A (en) * 1966-10-12 1969-11-25 Ampex Spatial filtering noise reduction scheme for a magnetooptic readout system
US3508215A (en) * 1966-11-25 1970-04-21 Sylvania Electric Prod Magnetic thin film memory apparatus

Also Published As

Publication number Publication date
GB1303694A (fr) 1973-01-17
DE2047393A1 (de) 1971-04-01
US3629517A (en) 1971-12-21

Similar Documents

Publication Publication Date Title
AU2270770A (fr)
AU465413B2 (fr)
AU429630B2 (fr)
AU2355770A (fr)
CS148495B1 (fr)
AU427401B2 (fr)
AU425297B2 (fr)
AU410358B2 (fr)
AU428129B2 (fr)
AU417208B2 (fr)
AT308690B (fr)
AU428074B2 (fr)
AU414607B2 (fr)
AU5079269A (fr)
AR203167Q (fr)
AU5133369A (fr)
CS148153B2 (fr)
AU4923469A (fr)
CS148107B2 (fr)
CS148370B1 (fr)
AU5228269A (fr)
AU1036070A (fr)
CS148396B1 (fr)
CH555062A (fr)
CH560761A5 (fr)

Legal Events

Date Code Title Description
ST Notification of lapse