JPS62223U - - Google Patents
Info
- Publication number
- JPS62223U JPS62223U JP6188586U JP6188586U JPS62223U JP S62223 U JPS62223 U JP S62223U JP 6188586 U JP6188586 U JP 6188586U JP 6188586 U JP6188586 U JP 6188586U JP S62223 U JPS62223 U JP S62223U
- Authority
- JP
- Japan
- Prior art keywords
- magnetic circuit
- optical axis
- respect
- objective lens
- driving device
- 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
- 230000003287 optical effect Effects 0.000 claims 2
- 230000002457 bidirectional effect Effects 0.000 claims 1
- 230000004907 flux Effects 0.000 claims 1
Landscapes
- Optical Recording Or Reproduction (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
Description
第１図は本考案の実施例の磁気回路と磁界分布
を示し、第２図は第１図の構造を示す斜視図、第
３図は本考案の磁気回路を含む対物レンズ駆動装
置の分解斜視図、第４図は第３図の組立後の一部
断面による斜視図である。
２……基台、３……ヨークプレート、４……磁
石、６……磁気空隙、１０……対物レンズ、１２
……フオーカシングコイル、１３……トラツキン
グコイル。
Fig. 1 shows a magnetic circuit and magnetic field distribution according to an embodiment of the present invention, Fig. 2 is a perspective view showing the structure of Fig. 1, and Fig. 3 is an exploded perspective view of an objective lens driving device including the magnetic circuit of the present invention. 4 is a partially sectional perspective view of FIG. 3 after assembly. 2...Base, 3...Yoke plate, 4...Magnet, 6...Magnetic gap, 10...Objective lens, 12
...Focusing coil, 13...Tracking coil.
Claims (1)
を囲むヨークをもつ磁気回路を光軸に対して対称
にかつ同極同志が対向にするように配置し、第１
、第２の磁気回路に磁束と直交する２方向駆動コ
イルを配設し、それらのコイルに電流を流すこと
により前記レンズを記録媒体に対するフオーカス
方向とトラツキング方向に駆動する対物レンズ駆
動装置において、前記レンズのそれぞれの駆動範
囲内で、前記コイルが前記磁気回路の磁石の長さ
よりも内側に位置するように、配設されているこ
とを特徴とする対物レンズ駆動装置。 A magnetic circuit having a yoke surrounding a rectangular magnet magnetized in the thickness direction and long in the optical axis direction is arranged symmetrically with respect to the optical axis so that the same polarity faces each other.
, an objective lens driving device in which bidirectional driving coils orthogonal to the magnetic flux are disposed in the second magnetic circuit, and the lens is driven in the focusing direction and the tracking direction with respect to the recording medium by passing current through these coils, An objective lens driving device characterized in that the coil is arranged so as to be located inside the length of the magnet of the magnetic circuit within the driving range of each lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986061885U JPH0544894Y2 (en) | 1986-04-25 | 1986-04-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986061885U JPH0544894Y2 (en) | 1986-04-25 | 1986-04-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62223U true JPS62223U (en) | 1987-01-06 |
| JPH0544894Y2 JPH0544894Y2 (en) | 1993-11-16 |
Family
ID=30590579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986061885U Expired - Lifetime JPH0544894Y2 (en) | 1986-04-25 | 1986-04-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0544894Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS578928A (en) * | 1980-06-20 | 1982-01-18 | Hitachi Ltd | Three-dimensional driver |
-
1986
- 1986-04-25 JP JP1986061885U patent/JPH0544894Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS578928A (en) * | 1980-06-20 | 1982-01-18 | Hitachi Ltd | Three-dimensional driver |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0544894Y2 (en) | 1993-11-16 |
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