JPS58190841U - Focus lens movement control device for recorded information reading device - Google Patents
Focus lens movement control device for recorded information reading deviceInfo
- Publication number
- JPS58190841U JPS58190841U JP8835882U JP8835882U JPS58190841U JP S58190841 U JPS58190841 U JP S58190841U JP 8835882 U JP8835882 U JP 8835882U JP 8835882 U JP8835882 U JP 8835882U JP S58190841 U JPS58190841 U JP S58190841U
- Authority
- JP
- Japan
- Prior art keywords
- control device
- movement control
- focus lens
- focus
- information reading
- 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
Links
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図は従来のフォーカスレンズサーボループを
含むレンズ移動制御装置の回路図、第２図は本考案の実
施例の回路図、第３図及び第４図は第２図の回路の動作
例を示す波形図である。
主要部分の符号の説明、２・・・・・・ループスイッチ
、４・・・・・・ドライブアンプ、６・・・・・・スイ
ッチ制御回路、７・・・・・・起動信号発生器、Ｍ・・
・・・・モータ。゛ Figure 1 is a circuit diagram of a conventional lens movement control device including a focus lens servo loop, Figure 2 is a circuit diagram of an embodiment of the present invention, and Figures 3 and 4 are operational examples of the circuit in Figure 2. FIG. Explanation of symbols of main parts, 2...Loop switch, 4...Drive amplifier, 6...Switch control circuit, 7...Start signal generator, M...
····motor.
Claims (2)
アップスポット光収束用のフォーカスレンズを記録面か
ら最も離間した位置から通常動作位置近傍まで移動させ
るフォーカスレンズ移動制御装置であって、所定周期の
振動信号を前記フォーカスレンジの移動駆動信号として
用いるようにしたことを特徴とするフォーカスレンジ移
動制御装置。(1) A focus lens movement control device that turns off a focus servo loop and moves a focus lens for converging pickup spot light from a position farthest from a recording surface to a position near a normal operating position, and which generates a vibration signal of a predetermined period. A focus range movement control device characterized in that the focus range movement control device is used as a movement drive signal for the focus range.
とを特徴とする実用新案登録請求の範囲第１項記載の装
置。(2) The apparatus according to claim 1, wherein the vibration signal having a predetermined period is a square wave signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8835882U JPS58190841U (en) | 1982-06-14 | 1982-06-14 | Focus lens movement control device for recorded information reading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8835882U JPS58190841U (en) | 1982-06-14 | 1982-06-14 | Focus lens movement control device for recorded information reading device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58190841U true JPS58190841U (en) | 1983-12-19 |
Family
ID=30097035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8835882U Pending JPS58190841U (en) | 1982-06-14 | 1982-06-14 | Focus lens movement control device for recorded information reading device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58190841U (en) |
-
1982
- 1982-06-14 JP JP8835882U patent/JPS58190841U/en active Pending
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