JPS6417201A - Electromagnet for impressing magnetic field for magneto-optical disk - Google Patents
Electromagnet for impressing magnetic field for magneto-optical diskInfo
- Publication number
- JPS6417201A JPS6417201A JP17214987A JP17214987A JPS6417201A JP S6417201 A JPS6417201 A JP S6417201A JP 17214987 A JP17214987 A JP 17214987A JP 17214987 A JP17214987 A JP 17214987A JP S6417201 A JPS6417201 A JP S6417201A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic permeability
- magneto
- high magnetic
- optical disk
- inductances
- 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
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
PURPOSE:To enable high-speed switching of large magnetic fields by reinforcing two high magnetic permeability materials parallel with the plane of a magneto-optical disk in a magnetic path respectively by metals and specifying the inductances of core windings. CONSTITUTION:This electromagnet is constituted of the high magnetic permeability material 1 which is installed to face the cylindrical high magnetic permeability material 2 wound with the winding 23 with the magneto-optical disk 8 held in place therebetween and has a cylindrical hollow part 21 wound with the winding 5, the high magnetic permeability materials 3 and 4 which magnetically couple the high magnetic permeability materials 1 and 2, reinforcing metallic plates 6, 7 which reinforce the high magnetic permeability materials 1 and 3 and a circuit 10 for modulating the current for generating the magnetic field which passes the same current to the windings 5 and 23. Nonmagnetic materials such as aluminum, titanium, copper and zinc are used for the metal for reinforcement and the inductances of the core windings are specified to <=20muH. The inductances of the core windings are decreased and the closed magnetic path is constituted in such a manner and, therefore, the high-speed switching of the large magnetic fields is enabled.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17214987A JPS6417201A (en) | 1987-07-09 | 1987-07-09 | Electromagnet for impressing magnetic field for magneto-optical disk |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17214987A JPS6417201A (en) | 1987-07-09 | 1987-07-09 | Electromagnet for impressing magnetic field for magneto-optical disk |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6417201A true JPS6417201A (en) | 1989-01-20 |
Family
ID=15936473
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17214987A Pending JPS6417201A (en) | 1987-07-09 | 1987-07-09 | Electromagnet for impressing magnetic field for magneto-optical disk |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6417201A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58118025A (en) * | 1981-12-29 | 1983-07-13 | Fujitsu Ltd | Optical magnetic head |
JPS59152503A (en) * | 1983-02-19 | 1984-08-31 | Canon Inc | Optical pickup device |
JPS61123062A (en) * | 1984-11-20 | 1986-06-10 | Fujitsu Ltd | Data check processing method |
-
1987
- 1987-07-09 JP JP17214987A patent/JPS6417201A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58118025A (en) * | 1981-12-29 | 1983-07-13 | Fujitsu Ltd | Optical magnetic head |
JPS59152503A (en) * | 1983-02-19 | 1984-08-31 | Canon Inc | Optical pickup device |
JPS61123062A (en) * | 1984-11-20 | 1986-06-10 | Fujitsu Ltd | Data check processing method |
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