FR1547812A - Magneto-optical modulation reading system - Google Patents
Magneto-optical modulation reading systemInfo
- Publication number
- FR1547812A FR1547812A FR127873A FR127873A FR1547812A FR 1547812 A FR1547812 A FR 1547812A FR 127873 A FR127873 A FR 127873A FR 127873 A FR127873 A FR 127873A FR 1547812 A FR1547812 A FR 1547812A
- Authority
- FR
- France
- Prior art keywords
- magneto
- optical modulation
- reading system
- modulation reading
- optical
- 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
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
- G11C13/04—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam
- G11C13/06—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam using magneto-optical elements
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/16—Layers for recording by changing the magnetic properties, e.g. for Curie-point-writing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
-
- 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
- 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
-
- 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
- G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
- G11C13/04—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Theoretical Computer Science (AREA)
- Digital Magnetic Recording (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US59393466A | 1966-11-14 | 1966-11-14 | |
US63787267A | 1967-05-05 | 1967-05-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1547812A true FR1547812A (en) | 1968-11-29 |
Family
ID=27081836
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR127873A Expired FR1547812A (en) | 1966-11-14 | 1967-11-13 | Magneto-optical modulation reading system |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS4933775B1 (en) |
DE (1) | DE1524812A1 (en) |
FR (1) | FR1547812A (en) |
GB (1) | GB1147700A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2550647A1 (en) * | 1983-08-08 | 1985-02-15 | Xerox Corp | Magneto-optical storage element |
EP0243656A2 (en) * | 1986-04-24 | 1987-11-04 | International Business Machines Corporation | Method and apparatus for encoding and direct overwriting of magneto-optic data |
EP0252813A1 (en) * | 1986-07-11 | 1988-01-13 | Bull S.A. | High-frequency light polarisation modulator |
-
1967
- 1967-11-13 FR FR127873A patent/FR1547812A/en not_active Expired
- 1967-11-14 GB GB51823/67A patent/GB1147700A/en not_active Expired
- 1967-11-14 DE DE19671524812 patent/DE1524812A1/en active Pending
- 1967-11-14 JP JP42072827A patent/JPS4933775B1/ja active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2550647A1 (en) * | 1983-08-08 | 1985-02-15 | Xerox Corp | Magneto-optical storage element |
EP0243656A2 (en) * | 1986-04-24 | 1987-11-04 | International Business Machines Corporation | Method and apparatus for encoding and direct overwriting of magneto-optic data |
EP0243656A3 (en) * | 1986-04-24 | 1990-10-03 | International Business Machines Corporation | Method and apparatus for encoding and direct overwriting of magneto-optic data |
EP0252813A1 (en) * | 1986-07-11 | 1988-01-13 | Bull S.A. | High-frequency light polarisation modulator |
FR2601465A1 (en) * | 1986-07-11 | 1988-01-15 | Bull Sa | HIGH FREQUENCY MODULATOR DEVICE FOR POLARIZING LIGHT |
US4810065A (en) * | 1986-07-11 | 1989-03-07 | Bull S.A. | High-frequency light polarization modulator device |
Also Published As
Publication number | Publication date |
---|---|
DE1524812A1 (en) | 1970-12-17 |
JPS4933775B1 (en) | 1974-09-10 |
GB1147700A (en) | 1969-04-02 |
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