JPS5764341A - Optical system information reproducer - Google Patents

Optical system information reproducer

Info

Publication number
JPS5764341A
JPS5764341A JP14016780A JP14016780A JPS5764341A JP S5764341 A JPS5764341 A JP S5764341A JP 14016780 A JP14016780 A JP 14016780A JP 14016780 A JP14016780 A JP 14016780A JP S5764341 A JPS5764341 A JP S5764341A
Authority
JP
Japan
Prior art keywords
lens
relative speed
information track
shift detecting
optical system
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
JP14016780A
Other languages
Japanese (ja)
Inventor
Mitsushige Kondo
Kenjiro Kime
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP14016780A priority Critical patent/JPS5764341A/en
Publication of JPS5764341A publication Critical patent/JPS5764341A/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

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To simplify the constitution and also to elevate the accuracy, by moving a divergent angle converting lens provided in the proximity of a condensing lens, in the direction meeting at right angles with the optical axis, and correcting a position of a condensing spot, and a relative speed. CONSTITUTION:A lens actuator 20 corrects a condensing spot shifted from an information track 15, by moving a collimating lens 9 in the direction meeting at right angles with not only the optical axis but also an information track 15. Tracking sensors 40a, 40b are provided on opposed positions where the information track 15 is placed between them, and an output of a tracking shift detecting circuit 42 is provided to the lens actuator. Also, a relative speed shift detecting signal is applied to the lens actuator 20 from a relative speed shift detecting circuit 41.
JP14016780A 1980-10-06 1980-10-06 Optical system information reproducer Pending JPS5764341A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14016780A JPS5764341A (en) 1980-10-06 1980-10-06 Optical system information reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14016780A JPS5764341A (en) 1980-10-06 1980-10-06 Optical system information reproducer

Publications (1)

Publication Number Publication Date
JPS5764341A true JPS5764341A (en) 1982-04-19

Family

ID=15262435

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14016780A Pending JPS5764341A (en) 1980-10-06 1980-10-06 Optical system information reproducer

Country Status (1)

Country Link
JP (1) JPS5764341A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59215033A (en) * 1983-05-23 1984-12-04 Hitachi Ltd Optical disc recording and reproducing device
JPS63138534A (en) * 1986-11-29 1988-06-10 Sony Corp Optical recording and reproducing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59215033A (en) * 1983-05-23 1984-12-04 Hitachi Ltd Optical disc recording and reproducing device
JPS63138534A (en) * 1986-11-29 1988-06-10 Sony Corp Optical recording and reproducing device

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