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JPS573233A - Detecting method for track on optical disk - Google Patents

Detecting method for track on optical disk

Info

Publication number
JPS573233A
JPS573233A JP7638080A JP7638080A JPS573233A JP S573233 A JPS573233 A JP S573233A JP 7638080 A JP7638080 A JP 7638080A JP 7638080 A JP7638080 A JP 7638080A JP S573233 A JPS573233 A JP S573233A
Authority
JP
Japan
Prior art keywords
track
signal
optical head
detection signal
optical disk
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
JP7638080A
Other languages
Japanese (ja)
Inventor
Masafumi Yokota
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP7638080A priority Critical patent/JPS573233A/en
Publication of JPS573233A publication Critical patent/JPS573233A/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
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
    • G11B7/08529—Methods and circuits to control the velocity of the head as it traverses the tracks

Landscapes

  • Moving Of Head For Track Selection And Changing (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

Abstract

PURPOSE:To perform accurate and high-speed track detection by moving an optical head in the radius direction of an optical disk at a prescribed speed and by obtaining a track detection signal by extracting a frequency component when the optical head crosses a track. CONSTITUTION:The reflected light of a light beam from an optical head 11 to an optical disk 1 is detected by a photoelectric converter 21, whose output is passed through a preamplifier 22 and an LPF23 to extract a frequency component when the optical head 11 crosses a track 2. The signal is inputted to a binary-coding circuit 24 to detect the envelope of the signal waveform, and its detection signal is compared with a reference level for binary coding. The signal is inputted to a track discriminating circuit 25 and outputted as a track detection signal through retrigger monostable multivibrator. This detection signal is counted and the result is collated with the number of the desired track to achieve accurate high-speed track detection.
JP7638080A 1980-06-06 1980-06-06 Detecting method for track on optical disk Pending JPS573233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7638080A JPS573233A (en) 1980-06-06 1980-06-06 Detecting method for track on optical disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7638080A JPS573233A (en) 1980-06-06 1980-06-06 Detecting method for track on optical disk

Publications (1)

Publication Number Publication Date
JPS573233A true JPS573233A (en) 1982-01-08

Family

ID=13603723

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7638080A Pending JPS573233A (en) 1980-06-06 1980-06-06 Detecting method for track on optical disk

Country Status (1)

Country Link
JP (1) JPS573233A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2558001A1 (en) * 1984-01-10 1985-07-12 Canon Kk METHOD AND APPARATUS FOR SEARCHING A TRACK ON AN INFORMATION OPTICAL MEDIUM.
JPS60194592A (en) * 1984-03-16 1985-10-03 株式会社日立製作所 Printed circuit board
US5525398A (en) * 1991-03-22 1996-06-11 Tdk Corporation Perpendicular magnetic recording medium and method for making

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5224027A (en) * 1975-08-19 1977-02-23 Matsushita Electric Ind Co Ltd Record regenerator
JPS52152704A (en) * 1976-04-23 1977-12-19 Thomson Brandt Optical data disk reader
JPS54130102A (en) * 1978-03-16 1979-10-09 Philips Nv Method of writing information* recording carrier* recorded record carrier* and information writing and reading device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5224027A (en) * 1975-08-19 1977-02-23 Matsushita Electric Ind Co Ltd Record regenerator
JPS52152704A (en) * 1976-04-23 1977-12-19 Thomson Brandt Optical data disk reader
JPS54130102A (en) * 1978-03-16 1979-10-09 Philips Nv Method of writing information* recording carrier* recorded record carrier* and information writing and reading device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2558001A1 (en) * 1984-01-10 1985-07-12 Canon Kk METHOD AND APPARATUS FOR SEARCHING A TRACK ON AN INFORMATION OPTICAL MEDIUM.
JPS60194592A (en) * 1984-03-16 1985-10-03 株式会社日立製作所 Printed circuit board
US5525398A (en) * 1991-03-22 1996-06-11 Tdk Corporation Perpendicular magnetic recording medium and method for making

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