JPS6417201A - Electromagnet for impressing magnetic field for magneto-optical disk - Google Patents

Electromagnet for impressing magnetic field for magneto-optical disk

Info

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
Application number
JP17214987A
Other languages
Japanese (ja)
Inventor
Hideo Tanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP17214987A priority Critical patent/JPS6417201A/en
Publication of JPS6417201A publication Critical patent/JPS6417201A/en
Pending legal-status Critical Current

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  • 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.
JP17214987A 1987-07-09 1987-07-09 Electromagnet for impressing magnetic field for magneto-optical disk Pending JPS6417201A (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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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