JPH03121588U - - Google Patents

Info

Publication number
JPH03121588U
JPH03121588U JP1990028066U JP2806690U JPH03121588U JP H03121588 U JPH03121588 U JP H03121588U JP 1990028066 U JP1990028066 U JP 1990028066U JP 2806690 U JP2806690 U JP 2806690U JP H03121588 U JPH03121588 U JP H03121588U
Authority
JP
Japan
Prior art keywords
optical disk
drive motor
detection device
light detection
markers
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
JP1990028066U
Other languages
English (en)
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 filed Critical
Priority to JP1990028066U priority Critical patent/JPH03121588U/ja
Publication of JPH03121588U publication Critical patent/JPH03121588U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
  • Rotational Drive Of Disk (AREA)

Description

【図面の簡単な説明】
第1図a,b及びcは本考案に使用する光デイ
スクの一例を示す平面図、A−A断面図及びB−
B断面図、第2図は上記光デイスクの回転速度を
一定に制御するための装置の回路構成を示す概略
図である。 1……光デイスク、2……マーカー、6……光
ピツクアツプ、7……光検出装置、8……増幅器
、9……比較器。

Claims (1)

  1. 【実用新案登録請求の範囲】 (1) 光デイスクの外周縁部に等間隔且つ同心円
    状に回転速度検出用のマーカーを形成したことを
    特徴とする光デイスク。 (2) 駆動モータの回転軸によつて中心孔を回転
    自在に支持された前記光デイスク上の前記マーカ
    ーの移動軌跡に沿つて光検出装置を配置し、この
    光検出装置によつて検出された単位時間当たりの
    マーカーの通過数に基づいて前記駆動モータの回
    転速度を制御したことを特徴とする光デイスクの
    駆動モータの回転制御装置。
JP1990028066U 1990-03-19 1990-03-19 Pending JPH03121588U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990028066U JPH03121588U (ja) 1990-03-19 1990-03-19

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990028066U JPH03121588U (ja) 1990-03-19 1990-03-19

Publications (1)

Publication Number Publication Date
JPH03121588U true JPH03121588U (ja) 1991-12-12

Family

ID=31530890

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990028066U Pending JPH03121588U (ja) 1990-03-19 1990-03-19

Country Status (1)

Country Link
JP (1) JPH03121588U (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007097424A1 (ja) * 2006-02-23 2007-08-30 Matsushita Electric Industrial Co., Ltd. モータ駆動装置およびモータ駆動方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007097424A1 (ja) * 2006-02-23 2007-08-30 Matsushita Electric Industrial Co., Ltd. モータ駆動装置およびモータ駆動方法

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