JPH0363014B2 - - Google Patents

Info

Publication number
JPH0363014B2
JPH0363014B2 JP57024439A JP2443982A JPH0363014B2 JP H0363014 B2 JPH0363014 B2 JP H0363014B2 JP 57024439 A JP57024439 A JP 57024439A JP 2443982 A JP2443982 A JP 2443982A JP H0363014 B2 JPH0363014 B2 JP H0363014B2
Authority
JP
Japan
Prior art keywords
protrusions
protrusion
dust
disk
pulses
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.)
Expired - Lifetime
Application number
JP57024439A
Other languages
English (en)
Japanese (ja)
Other versions
JPS58142213A (ja
Inventor
Yasushi Ito
Katsuo Uta
Yoryuki Anraku
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.)
Hitachi Ltd
Hitachi High Tech Corp
Original Assignee
Hitachi Ltd
Hitachi Electronics Engineering Co Ltd
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 Hitachi Ltd, Hitachi Electronics Engineering Co Ltd filed Critical Hitachi Ltd
Priority to JP2443982A priority Critical patent/JPS58142213A/ja
Publication of JPS58142213A publication Critical patent/JPS58142213A/ja
Publication of JPH0363014B2 publication Critical patent/JPH0363014B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/10—Indicating arrangements; Warning arrangements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/30—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring roughness or irregularity of surfaces

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
JP2443982A 1982-02-19 1982-02-19 磁気デイスク突起の検出方法 Granted JPS58142213A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2443982A JPS58142213A (ja) 1982-02-19 1982-02-19 磁気デイスク突起の検出方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2443982A JPS58142213A (ja) 1982-02-19 1982-02-19 磁気デイスク突起の検出方法

Publications (2)

Publication Number Publication Date
JPS58142213A JPS58142213A (ja) 1983-08-24
JPH0363014B2 true JPH0363014B2 (de) 1991-09-27

Family

ID=12138173

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2443982A Granted JPS58142213A (ja) 1982-02-19 1982-02-19 磁気デイスク突起の検出方法

Country Status (1)

Country Link
JP (1) JPS58142213A (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5362503A (en) * 1976-11-16 1978-06-05 Fujitsu Ltd Rotor's protrusion detector
JPS5328772B2 (de) * 1975-05-14 1978-08-16
JPS54111882A (en) * 1978-02-21 1979-09-01 Ishizuka Glass Tester which automatically sets reference value

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5328772U (de) * 1976-08-18 1978-03-11

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5328772B2 (de) * 1975-05-14 1978-08-16
JPS5362503A (en) * 1976-11-16 1978-06-05 Fujitsu Ltd Rotor's protrusion detector
JPS54111882A (en) * 1978-02-21 1979-09-01 Ishizuka Glass Tester which automatically sets reference value

Also Published As

Publication number Publication date
JPS58142213A (ja) 1983-08-24

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