JPS5753801A - Photothermic magnetic recorder - Google Patents

Photothermic magnetic recorder

Info

Publication number
JPS5753801A
JPS5753801A JP12748880A JP12748880A JPS5753801A JP S5753801 A JPS5753801 A JP S5753801A JP 12748880 A JP12748880 A JP 12748880A JP 12748880 A JP12748880 A JP 12748880A JP S5753801 A JPS5753801 A JP S5753801A
Authority
JP
Japan
Prior art keywords
axis
recording
prism
parts
center
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
JP12748880A
Other languages
Japanese (ja)
Other versions
JPH0239004B2 (en
Inventor
Takao Tsuji
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
Priority to JP12748880A priority Critical patent/JPS5753801A/en
Publication of JPS5753801A publication Critical patent/JPS5753801A/en
Publication of JPH0239004B2 publication Critical patent/JPH0239004B2/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
    • 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
    • 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

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE:To greatly improve the density of recording beam, by dividing a laser beam centering on the surface including the center axis of the beam to set the parts of intensive energy distribution at both sides and also to overlap the parts of weak energy distribution to each other and then forming a microspot. CONSTITUTION:The parallel laser beams 7 made incident to a prism 8 are divided into two parts centering on the ridgeline of the prism and refracted on prism faces 81-84 respectively. A circular beam of Gaussian distribution is symmetrical in terms of an axis X and converted into a laser beam 9 on an axis Y. The distribution of temperature obtained by condensing the beam 9 has the peak value of temperature at a position that is shifted onto the axis Y from the center of a microspot 15 by a certain distance and has a small width on the aixs Y passing through the center of the spot 15. On the other hand, when the sport 15 is shifted toward the axis X, the curve is compensated for the boundary between the different recording regions to ensure the recording with high density. In such constitution, the density of recording beam can be greatly improved.
JP12748880A 1980-09-13 1980-09-13 Photothermic magnetic recorder Granted JPS5753801A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12748880A JPS5753801A (en) 1980-09-13 1980-09-13 Photothermic magnetic recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12748880A JPS5753801A (en) 1980-09-13 1980-09-13 Photothermic magnetic recorder

Publications (2)

Publication Number Publication Date
JPS5753801A true JPS5753801A (en) 1982-03-31
JPH0239004B2 JPH0239004B2 (en) 1990-09-03

Family

ID=14961181

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12748880A Granted JPS5753801A (en) 1980-09-13 1980-09-13 Photothermic magnetic recorder

Country Status (1)

Country Link
JP (1) JPS5753801A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57113403A (en) * 1981-01-06 1982-07-14 Victor Co Of Japan Ltd Magnetic tape recording system
US4610009A (en) * 1983-05-23 1986-09-02 Xerox Corporation Writing, erasing and readout system for a magneto-optic recording medium
AU2006285712B2 (en) * 2005-08-31 2009-11-12 Mie University Method of producing saccharide composition starting with biomass
KR20220131294A (en) 2020-04-09 2022-09-27 쇼와 덴코 가부시키가이샤 Fertilizer manufacturing method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51107810A (en) * 1975-03-19 1976-09-24 Matsushita Electric Ind Co Ltd JIKIKIROKU SOCHI

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51107810A (en) * 1975-03-19 1976-09-24 Matsushita Electric Ind Co Ltd JIKIKIROKU SOCHI

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57113403A (en) * 1981-01-06 1982-07-14 Victor Co Of Japan Ltd Magnetic tape recording system
US4610009A (en) * 1983-05-23 1986-09-02 Xerox Corporation Writing, erasing and readout system for a magneto-optic recording medium
AU2006285712B2 (en) * 2005-08-31 2009-11-12 Mie University Method of producing saccharide composition starting with biomass
KR20220131294A (en) 2020-04-09 2022-09-27 쇼와 덴코 가부시키가이샤 Fertilizer manufacturing method

Also Published As

Publication number Publication date
JPH0239004B2 (en) 1990-09-03

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