JPS54145103A - Optical reproducer - Google Patents

Optical reproducer

Info

Publication number
JPS54145103A
JPS54145103A JP5314778A JP5314778A JPS54145103A JP S54145103 A JPS54145103 A JP S54145103A JP 5314778 A JP5314778 A JP 5314778A JP 5314778 A JP5314778 A JP 5314778A JP S54145103 A JPS54145103 A JP S54145103A
Authority
JP
Japan
Prior art keywords
focus
signals
constitution
reflected light
tracking
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.)
Granted
Application number
JP5314778A
Other languages
Japanese (ja)
Other versions
JPS5813976B2 (en
Inventor
Shinichi Tanaka
Kazuji Kobayashi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP5314778A priority Critical patent/JPS5813976B2/en
Publication of JPS54145103A publication Critical patent/JPS54145103A/en
Publication of JPS5813976B2 publication Critical patent/JPS5813976B2/en
Expired 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
    • G11B11/16—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 mechanical cutting, deforming or pressing
    • G11B11/18—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 mechanical cutting, deforming or pressing with reproducing by optical means

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To make the constitution of servo systems of focus and tracking easy and noncontactually reproduce the signal faithfully by detecting the two directions perpendicular to modulated groove walls through focus detection in a stereo record of 45-45 system. CONSTITUTION:In an optical pickup part 24, the output light of a laser oscillator 5 is divided to beams 6 and 7 for left and right channels with a splitter 8. The respective beams are focused at the respective walls of the modulated grooves 4 of a stereo record by lenses 9, 10. Each of the reflected light is sent to signal detectors 17, 18 by splitters 15, 16, whereby the reproduction of the signals is accomplished. In this case, focus erros are detected by the detectors 13, 14 from part of the reflected light and the signals of the difference and sum are obtained in a matrix circuit 19. These are then passed through LPFs 20, 21 to obtain the driving signals for servo systems 22, 23 of tracking and focus, by which the position of the pickup part 24 is controlled.
JP5314778A 1978-05-02 1978-05-02 optical reproduction device Expired JPS5813976B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5314778A JPS5813976B2 (en) 1978-05-02 1978-05-02 optical reproduction device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5314778A JPS5813976B2 (en) 1978-05-02 1978-05-02 optical reproduction device

Publications (2)

Publication Number Publication Date
JPS54145103A true JPS54145103A (en) 1979-11-13
JPS5813976B2 JPS5813976B2 (en) 1983-03-16

Family

ID=12934707

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5314778A Expired JPS5813976B2 (en) 1978-05-02 1978-05-02 optical reproduction device

Country Status (1)

Country Link
JP (1) JPS5813976B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58131436U (en) * 1982-03-02 1983-09-05 ナカミチ株式会社 Optical record playback device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58131436U (en) * 1982-03-02 1983-09-05 ナカミチ株式会社 Optical record playback device

Also Published As

Publication number Publication date
JPS5813976B2 (en) 1983-03-16

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