JPS6121018U - Optical disk damage prevention device - Google Patents

Optical disk damage prevention device

Info

Publication number
JPS6121018U
JPS6121018U JP10376884U JP10376884U JPS6121018U JP S6121018 U JPS6121018 U JP S6121018U JP 10376884 U JP10376884 U JP 10376884U JP 10376884 U JP10376884 U JP 10376884U JP S6121018 U JPS6121018 U JP S6121018U
Authority
JP
Japan
Prior art keywords
optical disk
objective lens
drive mechanism
arithmetic circuit
circuit unit
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
JP10376884U
Other languages
Japanese (ja)
Other versions
JPH0411219Y2 (en
Inventor
哲 日根野
Original Assignee
ソニー株式会社
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 ソニー株式会社 filed Critical ソニー株式会社
Priority to JP10376884U priority Critical patent/JPS6121018U/en
Publication of JPS6121018U publication Critical patent/JPS6121018U/en
Application granted granted Critical
Publication of JPH0411219Y2 publication Critical patent/JPH0411219Y2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は対物レンズを移動する駆動機構を説明するため
の図、第２図はトラッキングエラー信号、および距離情
報を検出するトラッキングエラー検出部の構造を示す説
明図、第３図は受光素子から得られる和信号と距離Ｄの
関係を示す特性図、第４図はこの考案の一実施例を示す
損傷防止装置の電気的な信号処理ブロック図である。 図中、１は光ディスク面、２は対物レンズ、４はドライ
ブコイル、１０は受光素子、１１は駆動機構、１３は加
算回路、１４は第１の比較器、１５はフォーカスドライ
ブ回路、１６は第２の比較器、１７は論理演算回路、１
８はスイッチング回路、１９は引離制御部を示す。Figure 1 is a diagram for explaining the drive mechanism that moves the objective lens, Figure 2 is an explanatory diagram showing the structure of the tracking error detection section that detects the tracking error signal and distance information, and Figure 3 is for explaining the structure of the tracking error detection section that detects the tracking error signal and distance information. A characteristic diagram showing the relationship between the obtained sum signal and distance D, and FIG. 4 is an electrical signal processing block diagram of a damage prevention device showing an embodiment of this invention. In the figure, 1 is an optical disk surface, 2 is an objective lens, 4 is a drive coil, 10 is a light receiving element, 11 is a drive mechanism, 13 is an addition circuit, 14 is a first comparator, 15 is a focus drive circuit, and 16 is a first Comparator 2, 17 logic operation circuit, 1
Reference numeral 8 indicates a switching circuit, and reference numeral 19 indicates a separation control section.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] フォーカスサーボ信号により対物レンズを移動する駆動
機構と、プッシュプル法によるトラッキングエラー検出
部を備えている光学装置に対して、前記トラッキングエ
ラー検出部の受光素子から得られる反射光が所定値以下
になる点を検出する演算回路部と、該演算回路部の出力
によって切り換わるスイッチング回路と、前記対物レン
ズを光ディスクから引き離す信号を出力する引離制御部
を設け、前記光ディスクと前記対物レンズが所定距離内
に近接したとき前記演算回路部により前記スイッチング
回路を切り換えて前記駆動機構に引き離し信号を供給す
るように構成したことを特徴とする光ディスク損傷防止
装置。For an optical device equipped with a drive mechanism that moves an objective lens based on a focus servo signal and a tracking error detection section using a push-pull method, the reflected light obtained from the light receiving element of the tracking error detection section becomes less than a predetermined value. An arithmetic circuit unit that detects a point, a switching circuit that is switched by the output of the arithmetic circuit unit, and a separation control unit that outputs a signal to separate the objective lens from the optical disc, and the optical disc and the objective lens are within a predetermined distance. An apparatus for preventing damage to an optical disk, characterized in that the arithmetic circuit unit switches the switching circuit to supply a separation signal to the drive mechanism when the optical disk approaches the drive mechanism.
JP10376884U 1984-07-11 1984-07-11 Optical disk damage prevention device Granted JPS6121018U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10376884U JPS6121018U (en) 1984-07-11 1984-07-11 Optical disk damage prevention device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10376884U JPS6121018U (en) 1984-07-11 1984-07-11 Optical disk damage prevention device

Publications (2)

Publication Number Publication Date
JPS6121018U true JPS6121018U (en) 1986-02-06
JPH0411219Y2 JPH0411219Y2 (en) 1992-03-19

Family

ID=30663140

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10376884U Granted JPS6121018U (en) 1984-07-11 1984-07-11 Optical disk damage prevention device

Country Status (1)

Country Link
JP (1) JPS6121018U (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56111136A (en) * 1980-02-01 1981-09-02 Pioneer Video Corp Protective device for reader of optical disc player

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56111136A (en) * 1980-02-01 1981-09-02 Pioneer Video Corp Protective device for reader of optical disc player

Also Published As

Publication number Publication date
JPH0411219Y2 (en) 1992-03-19

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