JPS5545128A - Optical record signal reproducing method - Google Patents

Optical record signal reproducing method

Info

Publication number
JPS5545128A
JPS5545128A JP11777178A JP11777178A JPS5545128A JP S5545128 A JPS5545128 A JP S5545128A JP 11777178 A JP11777178 A JP 11777178A JP 11777178 A JP11777178 A JP 11777178A JP S5545128 A JPS5545128 A JP S5545128A
Authority
JP
Japan
Prior art keywords
sound groove
disk
light beam
width
general
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
JP11777178A
Other languages
Japanese (ja)
Inventor
Takashi Iwazawa
Tadashi Tagami
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.)
Teac Corp
Original Assignee
Teac 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 Teac Corp filed Critical Teac Corp
Priority to JP11777178A priority Critical patent/JPS5545128A/en
Publication of JPS5545128A publication Critical patent/JPS5545128A/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
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0901—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
    • G11B7/0904—Dithered tracking systems

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To make it possible to read signals from a general-purpose record disk without touching by generating a digital signal representing the edge of a sound groove by vibrating a light beam more than the width of the sound groove and then by converting it into an analog signal. CONSTITUTION:While general-purpose audio record disk 1 is being turned, light beam 9 of smaller spot diameter then the width of sound groove 2 is projected upon the disk and also vibrated periodically with wider amplitude of the width of sound groove 9, and a track in the mean center of sound groove 2 is gradually sent in the radius direction of record disk 1 being made to agree with the center tract of light beam 9. Then, a digital signal is generated through the measurement of time from the reference point of the vibration to the edge of sound groove 2 and then converted into an analog signal to obtain a reproduction output. Therefore, accurate reproduction is possible and as a record disc, a general-purpose analog recording disk can be used, so that optical reproduction using a low-cast record disk can be performed.
JP11777178A 1978-09-22 1978-09-22 Optical record signal reproducing method Pending JPS5545128A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11777178A JPS5545128A (en) 1978-09-22 1978-09-22 Optical record signal reproducing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11777178A JPS5545128A (en) 1978-09-22 1978-09-22 Optical record signal reproducing method

Publications (1)

Publication Number Publication Date
JPS5545128A true JPS5545128A (en) 1980-03-29

Family

ID=14719909

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11777178A Pending JPS5545128A (en) 1978-09-22 1978-09-22 Optical record signal reproducing method

Country Status (1)

Country Link
JP (1) JPS5545128A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62125135U (en) * 1986-01-28 1987-08-08

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62125135U (en) * 1986-01-28 1987-08-08

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