JPS5512564A - Pick up movement unit - Google Patents

Pick up movement unit

Info

Publication number
JPS5512564A
JPS5512564A JP8511478A JP8511478A JPS5512564A JP S5512564 A JPS5512564 A JP S5512564A JP 8511478 A JP8511478 A JP 8511478A JP 8511478 A JP8511478 A JP 8511478A JP S5512564 A JPS5512564 A JP S5512564A
Authority
JP
Japan
Prior art keywords
pick
frequency
revolutions
mode selection
reproduction mode
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
JP8511478A
Other languages
Japanese (ja)
Inventor
Kyo Yamashita
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8511478A priority Critical patent/JPS5512564A/en
Publication of JPS5512564A publication Critical patent/JPS5512564A/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)

Abstract

PURPOSE:To achieve a plurality of pick up movement speeds simply in low cost, by using the pulse motor for the pick up drive force and selecting electronically the frequency applied depending on each reproduction mode, in the optical system video disc player. CONSTITUTION:The reference frequency of the reference signal production circuit is selected into a plurality of frequencies and directions of revolution at the controller 3 with the mode selection signal from the mode selection switch 2. Further, one frequency among them is selectively inputted to a plurality of drive circuits 4 to turn the pluse motor 1 in the number of revolutions according to each reproduction mode. This number of revolutions is reduced to a given pick up movement speed with the gear 6 to move the pick up via the pulley 6 and the belt 7.
JP8511478A 1978-07-14 1978-07-14 Pick up movement unit Pending JPS5512564A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8511478A JPS5512564A (en) 1978-07-14 1978-07-14 Pick up movement unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8511478A JPS5512564A (en) 1978-07-14 1978-07-14 Pick up movement unit

Publications (1)

Publication Number Publication Date
JPS5512564A true JPS5512564A (en) 1980-01-29

Family

ID=13849592

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8511478A Pending JPS5512564A (en) 1978-07-14 1978-07-14 Pick up movement unit

Country Status (1)

Country Link
JP (1) JPS5512564A (en)

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