JPS57186114A - Magnetic scale - Google Patents

Magnetic scale

Info

Publication number
JPS57186114A
JPS57186114A JP7077281A JP7077281A JPS57186114A JP S57186114 A JPS57186114 A JP S57186114A JP 7077281 A JP7077281 A JP 7077281A JP 7077281 A JP7077281 A JP 7077281A JP S57186114 A JPS57186114 A JP S57186114A
Authority
JP
Japan
Prior art keywords
magnetic
scale
anisotropy
recording
head
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
JP7077281A
Other languages
Japanese (ja)
Inventor
Shuzo Abiko
Takeshi Sawada
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.)
Canon Inc
Canon Electronics Inc
Original Assignee
Canon Inc
Canon Electronics Inc
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 Canon Inc, Canon Electronics Inc filed Critical Canon Inc
Priority to JP7077281A priority Critical patent/JPS57186114A/en
Publication of JPS57186114A publication Critical patent/JPS57186114A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
    • G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields

Abstract

PURPOSE:To obtain a magnetic scale with high resolution by performing short- wavelength recording and reproduction, by making the scale of a vertically magnetized recording medium, and constituting a magnetic head by a magnetic resistance effect element formed by a thin-film depositing method. CONSTITUTION:A scale 11 is formed by providing a lower magnetic layer 2 made of a soft magnetic material such as 78% Ni-Fe ''Permalloy '' and an upper magnetic layer 3 of a hard magnetic material such as 80% Co-Cr alloy on a base 1; the lower magnetic layer 2 has magnetic anisotropy in parallel to a surface, and the upper magnetic layer 3 has magnetic anisotropy at right angles to the surface. On this scale 11, magnetic recording is performed by a magnetic head on a vertical magnetic recording system. A reproducing head 20 is formed by giving a substrate 23 magnetic anisotropy at right angles to the running direction of a magnetic recording medium and then forming a magnetic resistance effect element 25 by a thin-film depositing method such as vapor deposition and sputtering.
JP7077281A 1981-05-13 1981-05-13 Magnetic scale Pending JPS57186114A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7077281A JPS57186114A (en) 1981-05-13 1981-05-13 Magnetic scale

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7077281A JPS57186114A (en) 1981-05-13 1981-05-13 Magnetic scale

Publications (1)

Publication Number Publication Date
JPS57186114A true JPS57186114A (en) 1982-11-16

Family

ID=13441139

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7077281A Pending JPS57186114A (en) 1981-05-13 1981-05-13 Magnetic scale

Country Status (1)

Country Link
JP (1) JPS57186114A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006525529A (en) * 2003-05-06 2006-11-09 エスアールアイ インターナショナル System and method for recording piston rod position information in a magnetic layer on a piston rod

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006525529A (en) * 2003-05-06 2006-11-09 エスアールアイ インターナショナル System and method for recording piston rod position information in a magnetic layer on a piston rod

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