JPS5534340A - Recording reproducing system by light beam - Google Patents

Recording reproducing system by light beam

Info

Publication number
JPS5534340A
JPS5534340A JP10651778A JP10651778A JPS5534340A JP S5534340 A JPS5534340 A JP S5534340A JP 10651778 A JP10651778 A JP 10651778A JP 10651778 A JP10651778 A JP 10651778A JP S5534340 A JPS5534340 A JP S5534340A
Authority
JP
Japan
Prior art keywords
track
tracking
detecting signal
tracks
light beam
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
JP10651778A
Other languages
Japanese (ja)
Inventor
Yuji Togami
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.)
Japan Broadcasting Corp
Original Assignee
Nippon Hoso Kyokai NHK
Japan Broadcasting 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 Nippon Hoso Kyokai NHK, Japan Broadcasting Corp filed Critical Nippon Hoso Kyokai NHK
Priority to JP10651778A priority Critical patent/JPS5534340A/en
Publication of JPS5534340A publication Critical patent/JPS5534340A/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
    • G11B7/0938—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 servo format, e.g. guide tracks, pilot signals

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To carry out easily and effectively tracking of the light beam with respect to the recording track by providing the tracking track independently from the information signal recording track. CONSTITUTION:The information signal recording track 2 is formed on the upper surface of the substrate 3 of transparent disc and on the lower surface of the substrate 3, the tracking track is formed. The reproducing laser beam 7 and the tracking laser beam 8 are respectively focused on the tracks 2 and 4 through the rotatable following half mirror 5. Then, the beam focused on the track 4 is incident on the light receiver 13 and converted into the track position detecting signal. According to the detecting signal, the rotating angle of the mirror 5 is controlled, thereby the beams 7 and 8 forming the beam spots precisely on the tracks 2, 4 respectively. In this manner, by the satisfactory position detecting signal without noise, the precise tracking control can be easily carried out.
JP10651778A 1978-08-31 1978-08-31 Recording reproducing system by light beam Pending JPS5534340A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10651778A JPS5534340A (en) 1978-08-31 1978-08-31 Recording reproducing system by light beam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10651778A JPS5534340A (en) 1978-08-31 1978-08-31 Recording reproducing system by light beam

Publications (1)

Publication Number Publication Date
JPS5534340A true JPS5534340A (en) 1980-03-10

Family

ID=14435592

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10651778A Pending JPS5534340A (en) 1978-08-31 1978-08-31 Recording reproducing system by light beam

Country Status (1)

Country Link
JP (1) JPS5534340A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5774852A (en) * 1980-10-23 1982-05-11 Sharp Corp Magnetic optical storing element
JPS57169996A (en) * 1981-04-09 1982-10-19 Sharp Corp Magnetooptic storage element
JPS5841446A (en) * 1981-09-04 1983-03-10 Hitachi Ltd Optical information tracking system
JPS5888838A (en) * 1981-11-19 1983-05-27 Sony Corp Optical signal recording system
JPS60217538A (en) * 1985-03-15 1985-10-31 Hitachi Ltd Optical recording and reproducing device
JPS61296535A (en) * 1985-06-21 1986-12-27 Olympus Optical Co Ltd Optical recording and reproducing device
JPS63841A (en) * 1987-06-26 1988-01-05 Sharp Corp Magneto-optical memory element
JPH03228240A (en) * 1990-09-21 1991-10-09 Sharp Corp Magneto-optical recording element
US5111031A (en) * 1988-05-07 1992-05-05 Sharp Kabushiki Kaisha Optical card and a recording/reproduction apparatus for the same

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5774852A (en) * 1980-10-23 1982-05-11 Sharp Corp Magnetic optical storing element
JPS57169996A (en) * 1981-04-09 1982-10-19 Sharp Corp Magnetooptic storage element
JPS5841446A (en) * 1981-09-04 1983-03-10 Hitachi Ltd Optical information tracking system
JPS5888838A (en) * 1981-11-19 1983-05-27 Sony Corp Optical signal recording system
JPS60217538A (en) * 1985-03-15 1985-10-31 Hitachi Ltd Optical recording and reproducing device
JPS61296535A (en) * 1985-06-21 1986-12-27 Olympus Optical Co Ltd Optical recording and reproducing device
JPS63841A (en) * 1987-06-26 1988-01-05 Sharp Corp Magneto-optical memory element
US5111031A (en) * 1988-05-07 1992-05-05 Sharp Kabushiki Kaisha Optical card and a recording/reproduction apparatus for the same
JPH03228240A (en) * 1990-09-21 1991-10-09 Sharp Corp Magneto-optical recording element

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