FR2119336A5 - - Google Patents
Info
- Publication number
- FR2119336A5 FR2119336A5 FR7141951A FR7141951A FR2119336A5 FR 2119336 A5 FR2119336 A5 FR 2119336A5 FR 7141951 A FR7141951 A FR 7141951A FR 7141951 A FR7141951 A FR 7141951A FR 2119336 A5 FR2119336 A5 FR 2119336A5
- 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
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
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US9991570A | 1970-12-21 | 1970-12-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2119336A5 true FR2119336A5 (OSRAM) | 1972-08-04 |
Family
ID=22277230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7141951A Expired FR2119336A5 (OSRAM) | 1970-12-21 | 1971-11-16 |
Country Status (6)
| Country | Link |
|---|---|
| CA (1) | CA954216A (OSRAM) |
| CH (1) | CH532820A (OSRAM) |
| DE (1) | DE2163121A1 (OSRAM) |
| FR (1) | FR2119336A5 (OSRAM) |
| GB (1) | GB1316917A (OSRAM) |
| IT (1) | IT941329B (OSRAM) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0077693A1 (fr) * | 1981-10-16 | 1983-04-27 | Bull S.A. | Dispositif opto-électronique de lecture d'informations contenues sur un support magnétique |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57133537A (en) * | 1981-02-06 | 1982-08-18 | Sharp Corp | Magnetic and optical recording and reproducing head |
| US4562502A (en) * | 1982-04-28 | 1985-12-31 | Tdk Corporation | Optical reproducing system |
| US4564877A (en) * | 1982-04-28 | 1986-01-14 | Tdk Corporation | Magnetic recording/reproducing system with wide-gapped transducer and method for using same |
-
1971
- 1971-11-10 GB GB5211571A patent/GB1316917A/en not_active Expired
- 1971-11-16 FR FR7141951A patent/FR2119336A5/fr not_active Expired
- 1971-11-26 IT IT3162971A patent/IT941329B/it active
- 1971-12-02 CH CH1751471A patent/CH532820A/de not_active IP Right Cessation
- 1971-12-20 DE DE19712163121 patent/DE2163121A1/de active Pending
- 1971-12-20 CA CA130,476A patent/CA954216A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0077693A1 (fr) * | 1981-10-16 | 1983-04-27 | Bull S.A. | Dispositif opto-électronique de lecture d'informations contenues sur un support magnétique |
Also Published As
| Publication number | Publication date |
|---|---|
| CH532820A (de) | 1973-01-15 |
| IT941329B (it) | 1973-03-01 |
| GB1316917A (en) | 1973-05-16 |
| CA954216A (en) | 1974-09-03 |
| DE2163121A1 (de) | 1972-07-13 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |