JPS5750409A - Reading element for information and reading method using said element - Google Patents
Reading element for information and reading method using said elementInfo
- Publication number
- JPS5750409A JPS5750409A JP55126276A JP12627680A JPS5750409A JP S5750409 A JPS5750409 A JP S5750409A JP 55126276 A JP55126276 A JP 55126276A JP 12627680 A JP12627680 A JP 12627680A JP S5750409 A JPS5750409 A JP S5750409A
- Authority
- JP
- Japan
- Prior art keywords
- film layer
- thin
- picture information
- alloy
- reading
- 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.)
- Pending
Links
Classifications
-
- 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
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Thin Magnetic Films (AREA)
Abstract
PURPOSE:To facilitate manufacture, to obtain response at high speed and to enable lengthening by forming an amorphous magnetic substance thin-film layer consisting of a Tb-Fe alloy having a mangetic compensation temperature point within a specified temperature range onto a light transmitting substance substrate. CONSTITUTION:The element 1 is manufactured in such a manner that the amorphous magnetic substance thin-film layer 3 composed of the Tb-Fe alloy having the magnetic compensation temperature point within the temperature range of 0-200 deg.C onto the light transmitting substance substrate 2 in soda glass, etc. through a sputtering method, etc. A reverse bias magnetic field is applied to the thin-film layer 3 in an extent that the coercive force of vertical magnetization does not expire, radioactive heat is given by means of a lamp for a heat source such as a halogen lamp, a magnetic change is brought about to the Tb-Fe alloy according to the quantity of reflected heat corresponding to picture information, and the picture information is recorded to the thin-film layer. When reading, laser rays are scanned by means of a rotary polyhedral mirror, the laser rays, a plane of polarization thereof changes, are reflected by the thin-film layer 3, and the diffrence of the planes of polarization is read by a ray receiving section, thus obtaining the picture information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55126276A JPS5750409A (en) | 1980-09-11 | 1980-09-11 | Reading element for information and reading method using said element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55126276A JPS5750409A (en) | 1980-09-11 | 1980-09-11 | Reading element for information and reading method using said element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5750409A true JPS5750409A (en) | 1982-03-24 |
Family
ID=14931191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55126276A Pending JPS5750409A (en) | 1980-09-11 | 1980-09-11 | Reading element for information and reading method using said element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5750409A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2797709A1 (en) * | 1999-08-17 | 2001-02-23 | Thomson Csf | Magneto-optical read head for use with high density multi-track magnetic tape has a read head where the operating temperature is kept in an acceptable range and the read head magnetic signal to noise ratio is kept very low |
-
1980
- 1980-09-11 JP JP55126276A patent/JPS5750409A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2797709A1 (en) * | 1999-08-17 | 2001-02-23 | Thomson Csf | Magneto-optical read head for use with high density multi-track magnetic tape has a read head where the operating temperature is kept in an acceptable range and the read head magnetic signal to noise ratio is kept very low |
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