JPS54151876A - Magnetic field impressing device - Google Patents

Magnetic field impressing device

Info

Publication number
JPS54151876A
JPS54151876A JP6085478A JP6085478A JPS54151876A JP S54151876 A JPS54151876 A JP S54151876A JP 6085478 A JP6085478 A JP 6085478A JP 6085478 A JP6085478 A JP 6085478A JP S54151876 A JPS54151876 A JP S54151876A
Authority
JP
Japan
Prior art keywords
magnetic field
slit
magnetic
test piece
pole
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
JP6085478A
Other languages
Japanese (ja)
Inventor
Wakatake Matsuda
Seiji Hattori
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.)
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
Nippon Telegraph and Telephone 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 Fujitsu Ltd, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP6085478A priority Critical patent/JPS54151876A/en
Publication of JPS54151876A publication Critical patent/JPS54151876A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measuring Magnetic Variables (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

PURPOSE: To make it possible to measure a magnetic member having a high magnetic reserving power without cutting a test piece by arranging two pairs of magnets in a manner to face one another so that a magnetic field may be established in their intermediate region and by forming a portion of an iron core with a slit.
CONSTITUTION: The core 1 of an electromagnet is formed at its portion with a slit 6, and such electromagnets are paired and arranged such that the same polarities face each other. An energizing coil 5 is arranged in a vertically symmetrical position. A laser beam or an incandescent light 12 is made to illuminate a test piece 12 through the slit 6 so that the mehaviour of the test piece 4 is measured from a relatively weaker magnetic field to a strong magnetic field with the use of the color or Farady effects. The magnetic flux from the N pole toward the S pole is horizontally uniform at the facing intermediate regions. Thus, the magneticity of a magnetic disk or the like can be beasured continuously without any breakage.
COPYRIGHT: (C)1979,JPO&Japio
JP6085478A 1978-05-22 1978-05-22 Magnetic field impressing device Pending JPS54151876A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6085478A JPS54151876A (en) 1978-05-22 1978-05-22 Magnetic field impressing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6085478A JPS54151876A (en) 1978-05-22 1978-05-22 Magnetic field impressing device

Publications (1)

Publication Number Publication Date
JPS54151876A true JPS54151876A (en) 1979-11-29

Family

ID=13154376

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6085478A Pending JPS54151876A (en) 1978-05-22 1978-05-22 Magnetic field impressing device

Country Status (1)

Country Link
JP (1) JPS54151876A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63302384A (en) * 1987-06-03 1988-12-09 Hitachi Ltd Magnetic defect inspecting apparatus
JPH01155283A (en) * 1987-12-14 1989-06-19 Hitachi Ltd Evaluating apparatus of magnetic disk
JPH0390881A (en) * 1989-08-25 1991-04-16 Ldj Electron Inc Apparatus for measuring hysteresis loop of magnetic film
JPH0494586U (en) * 1990-12-27 1992-08-17
JPH06109655A (en) * 1992-09-28 1994-04-22 Nippon Steel Corp Magneto-optic defect inspecting apparatus
JPH0665883U (en) * 1991-06-19 1994-09-16 有限会社アスカ電子 Micro domain structure observation device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63302384A (en) * 1987-06-03 1988-12-09 Hitachi Ltd Magnetic defect inspecting apparatus
JPH01155283A (en) * 1987-12-14 1989-06-19 Hitachi Ltd Evaluating apparatus of magnetic disk
JPH0390881A (en) * 1989-08-25 1991-04-16 Ldj Electron Inc Apparatus for measuring hysteresis loop of magnetic film
JPH0494586U (en) * 1990-12-27 1992-08-17
JPH0665883U (en) * 1991-06-19 1994-09-16 有限会社アスカ電子 Micro domain structure observation device
JPH06109655A (en) * 1992-09-28 1994-04-22 Nippon Steel Corp Magneto-optic defect inspecting apparatus

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