JPS57143741A - Tracking method - Google Patents

Tracking method

Info

Publication number
JPS57143741A
JPS57143741A JP56027740A JP2774081A JPS57143741A JP S57143741 A JPS57143741 A JP S57143741A JP 56027740 A JP56027740 A JP 56027740A JP 2774081 A JP2774081 A JP 2774081A JP S57143741 A JPS57143741 A JP S57143741A
Authority
JP
Japan
Prior art keywords
scanning
luminous point
start signal
recording
signal
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
JP56027740A
Other languages
Japanese (ja)
Inventor
Yoshihiro Tokuume
Hideaki Sato
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
Original Assignee
Canon 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 filed Critical Canon Inc
Priority to JP56027740A priority Critical patent/JPS57143741A/en
Publication of JPS57143741A publication Critical patent/JPS57143741A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To exactly scanning a signal track recorded on a recording medium, by recording a scanning start signal in advance on the recording medium, detecting that a luminous point has caught the scanning start signal, by a photodetector, and scanning the luminous point. CONSTITUTION:On an optical magnetic recording tape 6 of a recording medium, a recording track 7 is formed, and on a part of its track 7, a scanning start signal 8 is formed. The optical magnetic recording tape 6 runs in front of a luminous point scanning element 1, the optical magnetic tape 6 moves, and when a light beam emitted from the luminous point scanning element 1 has come on the scanning start signal 8, the scanning start signal is detected by an optical detector 10, and a signal shown in the figure is outputed. Subsequently, such a lamp waveform is applied to an oscillator 17, a light beam from a semiconductor laser 2 is deflected and scans on the recording track 7. According to such a method, tracking in case when a signal is reproduced by scanning a luminous point is executed exactly.
JP56027740A 1981-02-27 1981-02-27 Tracking method Pending JPS57143741A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56027740A JPS57143741A (en) 1981-02-27 1981-02-27 Tracking method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56027740A JPS57143741A (en) 1981-02-27 1981-02-27 Tracking method

Publications (1)

Publication Number Publication Date
JPS57143741A true JPS57143741A (en) 1982-09-06

Family

ID=12229423

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56027740A Pending JPS57143741A (en) 1981-02-27 1981-02-27 Tracking method

Country Status (1)

Country Link
JP (1) JPS57143741A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05344463A (en) * 1991-01-31 1993-12-24 Samsung Electron Co Ltd Image processing device
US5544133A (en) * 1991-10-23 1996-08-06 Samsung Electronics Co., Ltd. Recording/reproducing apparatus using optical magnetic tape

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05344463A (en) * 1991-01-31 1993-12-24 Samsung Electron Co Ltd Image processing device
US5544133A (en) * 1991-10-23 1996-08-06 Samsung Electronics Co., Ltd. Recording/reproducing apparatus using optical magnetic tape

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