JPS5525817A - Reading device for magnetic record signal - Google Patents
Reading device for magnetic record signalInfo
- Publication number
- JPS5525817A JPS5525817A JP9703578A JP9703578A JPS5525817A JP S5525817 A JPS5525817 A JP S5525817A JP 9703578 A JP9703578 A JP 9703578A JP 9703578 A JP9703578 A JP 9703578A JP S5525817 A JPS5525817 A JP S5525817A
- Authority
- JP
- Japan
- Prior art keywords
- film
- supplied
- domain
- magnetized
- easy magnetization
- 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
Abstract
PURPOSE: To erase the maze magnetic domain and then to improve the S/N by supplying the DC bias magnetic field vertically onto the surface of the soft magnetic film vertical easy magnetization film using the photomagnetic effect.
CONSTITUTION: Helmholtz coil 10 is installed at the outer circumference of soft magnetic film vertical easy magnetization film device 2 which touches magnetic tape 1 running in the direction of the arrow mark, and the DC bias magnetic field is supplied vertically onto the surface of the magnetized film of device 2. Under these conditions, the beams sent from light source generator 3 are condensed on the magnetized film of divice 2 through polarizer 4, beam splitter 5 and object lens 6 each and then reflected by the reflector film to be supplied to light detector 7 via lens 6 and splitter 5. During this, the beam receives the right or left Faraday optical rotation according to the magnetizing direction of the domain of the magnetized film. As a result, the optical modulation signal received the width modulation according to the domain width is supplied to photoelectric converter 8, and the electric signal obtained at output terminal 9 of element 8 is regenerated through the FM regenerator.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9703578A JPS5525817A (en) | 1978-08-09 | 1978-08-09 | Reading device for magnetic record signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9703578A JPS5525817A (en) | 1978-08-09 | 1978-08-09 | Reading device for magnetic record signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5525817A true JPS5525817A (en) | 1980-02-23 |
Family
ID=14181260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9703578A Pending JPS5525817A (en) | 1978-08-09 | 1978-08-09 | Reading device for magnetic record signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5525817A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0061892A2 (en) * | 1981-03-26 | 1982-10-06 | Sony Corporation | Thermomagnetic recording methods |
| JPS58165747U (en) * | 1982-04-28 | 1983-11-04 | ティーディーケイ株式会社 | magnetic recording readout device |
| JPS6289201A (en) * | 1985-10-16 | 1987-04-23 | Hitachi Ltd | Magnetic recording and reproducing device |
| JPH0325428U (en) * | 1989-07-20 | 1991-03-15 |
-
1978
- 1978-08-09 JP JP9703578A patent/JPS5525817A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0061892A2 (en) * | 1981-03-26 | 1982-10-06 | Sony Corporation | Thermomagnetic recording methods |
| JPS58165747U (en) * | 1982-04-28 | 1983-11-04 | ティーディーケイ株式会社 | magnetic recording readout device |
| JPH0329781Y2 (en) * | 1982-04-28 | 1991-06-25 | ||
| JPS6289201A (en) * | 1985-10-16 | 1987-04-23 | Hitachi Ltd | Magnetic recording and reproducing device |
| JPH0325428U (en) * | 1989-07-20 | 1991-03-15 |
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