JPS6121018U - Optical disk damage prevention device - Google Patents
Optical disk damage prevention deviceInfo
- 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
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
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)
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.
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)
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 |
-
1984
- 1984-07-11 JP JP10376884U patent/JPS6121018U/en active Granted
Patent Citations (1)
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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