JPS533307A - Index hole detector for magnetic recording media - Google Patents

Index hole detector for magnetic recording media

Info

Publication number
JPS533307A
JPS533307A JP6129577A JP6129577A JPS533307A JP S533307 A JPS533307 A JP S533307A JP 6129577 A JP6129577 A JP 6129577A JP 6129577 A JP6129577 A JP 6129577A JP S533307 A JPS533307 A JP S533307A
Authority
JP
Japan
Prior art keywords
magnetic recording
recording media
index hole
hole detector
detector
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
JP6129577A
Other languages
English (en)
Japanese (ja)
Inventor
Jieemusu Keraa Ronarudo
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of JPS533307A publication Critical patent/JPS533307A/ja
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/24—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main recording
    • G11B27/26—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main recording by photoelectric detection, e.g. of sprocket holes

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Paints Or Removers (AREA)
  • Optical Transform (AREA)
JP6129577A 1976-06-30 1977-05-27 Index hole detector for magnetic recording media Pending JPS533307A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US70131876A 1976-06-30 1976-06-30

Publications (1)

Publication Number Publication Date
JPS533307A true JPS533307A (en) 1978-01-13

Family

ID=24816885

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6129577A Pending JPS533307A (en) 1976-06-30 1977-05-27 Index hole detector for magnetic recording media

Country Status (4)

Country Link
JP (1) JPS533307A (OSRAM)
DE (1) DE2720164A1 (OSRAM)
FR (1) FR2357029A1 (OSRAM)
IT (1) IT1115670B (OSRAM)

Also Published As

Publication number Publication date
FR2357029B1 (OSRAM) 1980-02-08
FR2357029A1 (fr) 1978-01-27
IT1115670B (it) 1986-02-03
DE2720164A1 (de) 1978-01-12

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