JPS6161622U - - Google Patents
Info
- Publication number
- JPS6161622U JPS6161622U JP14633284U JP14633284U JPS6161622U JP S6161622 U JPS6161622 U JP S6161622U JP 14633284 U JP14633284 U JP 14633284U JP 14633284 U JP14633284 U JP 14633284U JP S6161622 U JPS6161622 U JP S6161622U
- Authority
- JP
- Japan
- Prior art keywords
- optical system
- optical
- reading device
- movement amount
- detection means
- 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
- 230000003287 optical effect Effects 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 6
- 230000004069 differentiation Effects 0.000 claims 1
- 230000001678 irradiating effect Effects 0.000 claims 1
- 238000004804 winding Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Description
第１図は従来例を示す構成図、第２図は光学系
の振動速度の周波数特性を示す図であり、Ａは従
来例によるもの、Ｂは本考案によるもの、第３図
は本考案の一実施例を示す構成図、第４図はその
回路系を示すブロツク図、第５図は本考案の他の
実施例を示す構成図、第６図は第３図における振
動検出器の変形例を示す構成図である。
主要部分の符号の説明、２…対物レンズ、４…
支持機構、７ａ，７ｂ，９ａ，９ｂ…板バネ、８
…中間部材、１１…フオーカス用駆動コイル、１
３…トラツキング用駆動コイル、１４，１６ａ，
１６ｂ…磁気回路部、２０…検出用磁石、２１…
検出用コイル、２３…振動検出器。
Fig. 1 is a diagram showing the configuration of a conventional example, Fig. 2 is a diagram showing the frequency characteristics of the vibration velocity of the optical system, where A is the conventional example, B is the one according to the present invention, and Fig. 3 is the one according to the present invention. FIG. 4 is a block diagram showing the circuit system, FIG. 5 is a block diagram showing another embodiment of the present invention, and FIG. 6 is a modification of the vibration detector in FIG. 3. FIG. Explanation of symbols of main parts, 2...Objective lens, 4...
Support mechanism, 7a, 7b, 9a, 9b...plate spring, 8
...Intermediate member, 11...Focus drive coil, 1
3... Tracking drive coil, 14, 16a,
16b...Magnetic circuit section, 20...Detection magnet, 21...
Detection coil, 23... vibration detector.
Claims (1)
を照射せしめるための光学系と、前記光学系をこ
の光学系から発せられる照射光の光軸方向及びこ
れに垂直な方向の少なくとも１方向において移動
可能にかつ前記光軸が前記記録面に対して垂直と
なるように支持する支持機構と、前記光学系をそ
の移動方向に移動せしめる駆動手段とを含む光学
式情報読取装置における光学系駆動装置であつて
、前記光学系の移動量を検出する移動量検出手段
と、前記移動検出手段の出力を前記駆動手段に帰
還する帰還手段とを備えたことを特徴とする光学
式情報読取装置における光学系駆動装置。 (2) 前記帰還手段は、前記移動量検出手段の出
力を微分する微分回路を含むことを特徴とする実
用新案登録請求の範囲第１項記載の光学式情報読
取装置における光学系駆動装置。 (3) 前記移動量検出手段は、前記光学系に取り
付けられた磁石と、前記磁石の近傍に配置され前
記光学系の移動方向に応じてヨークに巻回された
コイルとからなることを特徴とする実用新案登録
請求の範囲第１項記載の光学式情報読取装置にお
ける光学系駆動装置。 (4) 前記コイルは中間部で巻方向が反転してい
ることを特徴とする実用新案登録請求の範囲第３
項記載の光学式情報読取装置における光学系駆動
装置。[Claims for Utility Model Registration] (1) An optical system for irradiating a recording surface of a disk-shaped recording medium with spot light; optical information comprising a support mechanism that supports the optical system so as to be movable in at least one of the directions such that the optical axis is perpendicular to the recording surface; and a drive means that moves the optical system in the moving direction. An optical system driving device in a reading device, characterized by comprising a movement amount detection means for detecting the movement amount of the optical system, and a return means for feeding back an output of the movement detection means to the drive means. An optical system drive device in an optical information reading device. (2) The optical system driving device in the optical information reading device according to claim 1, wherein the feedback means includes a differentiation circuit that differentiates the output of the movement amount detection means. (3) The movement amount detection means is characterized by comprising a magnet attached to the optical system and a coil arranged near the magnet and wound around a yoke according to the direction of movement of the optical system. An optical system drive device in an optical information reading device according to claim 1 of the utility model registration claim. (4) Utility model registration claim 3, characterized in that the winding direction of the coil is reversed at the middle portion.
An optical system drive device in the optical information reading device described in 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14633284U JPS6161622U (en) | 1984-09-27 | 1984-09-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14633284U JPS6161622U (en) | 1984-09-27 | 1984-09-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6161622U true JPS6161622U (en) | 1986-04-25 |
Family
ID=30704569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14633284U Pending JPS6161622U (en) | 1984-09-27 | 1984-09-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6161622U (en) |
-
1984
- 1984-09-27 JP JP14633284U patent/JPS6161622U/ja active Pending
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