JPH01181122U - - Google Patents
Info
- Publication number
- JPH01181122U JPH01181122U JP7793188U JP7793188U JPH01181122U JP H01181122 U JPH01181122 U JP H01181122U JP 7793188 U JP7793188 U JP 7793188U JP 7793188 U JP7793188 U JP 7793188U JP H01181122 U JPH01181122 U JP H01181122U
- Authority
- JP
- Japan
- Prior art keywords
- housing
- optical axis
- axis direction
- objective lens
- movable body
- 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 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
第１図は本考案の一実施例を示す断面図、第２
図はその底面図、第３図は一部を拡大して示す断
面図、第４図ａは本実施例方式の周波数特性図、
第４図ｂは従来方式による場合の周波数特性図で
ある。
１…対物レンズ、２…レンズ保持枠、４…コイ
ルボビン、５…可動体、６…ハウジング、７，８
…板ばね、１４…外ヨーク、１５…磁石、１６…
内ヨーク、１８…コイル、１９，２０…剛性板。
Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a bottom view, FIG. 3 is a partially enlarged sectional view, and FIG. 4 a is a frequency characteristic diagram of the method of this embodiment.
FIG. 4b is a frequency characteristic diagram in the case of the conventional method. DESCRIPTION OF SYMBOLS 1... Objective lens, 2... Lens holding frame, 4... Coil bobbin, 5... Movable body, 6... Housing, 7, 8
...Plate spring, 14...Outer yoke, 15...Magnet, 16...
Inner yoke, 18...coil, 19, 20... rigid plate.
Claims (1)
グに支持されて対物レンズを収納保持するレンズ
保持枠とコイルボビンとを含む可動体を設け、前
記ハウジングに固定された永久磁石と外ヨークと
内ヨークとにより形成される磁気回路中にて前記
コイルボビンに巻回されたコイルへの通電制御に
より発生する電磁駆動力により前記可動体を光軸
方向に可動させるムービングコイル型の対物レン
ズ駆動装置において、前記可動体の光軸方向に離
間した個所を半径方向に延設されて前記ハウジン
グにより支持する端部がナイフエツジ形状の複数
枚の剛性板を設けたことを特徴とする対物レンズ
駆動装置。 A movable body including a lens holding frame and a coil bobbin is provided, which is supported by a housing so as to be movable in the optical axis direction via a plate spring, and which houses and holds an objective lens, and includes a permanent magnet fixed to the housing, an outer yoke, and an inner yoke. In a moving coil type objective lens drive device that moves the movable body in the optical axis direction by an electromagnetic driving force generated by controlling energization of a coil wound around the coil bobbin in a magnetic circuit formed by the What is claimed is: 1. An objective lens drive device comprising: a plurality of rigid plates each having a knife-edge shape and extending in the radial direction at locations spaced apart in the optical axis direction of a movable body and having knife-edge shaped ends supported by the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7793188U JPH01181122U (en) | 1988-06-13 | 1988-06-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7793188U JPH01181122U (en) | 1988-06-13 | 1988-06-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01181122U true JPH01181122U (en) | 1989-12-27 |
Family
ID=31302888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7793188U Pending JPH01181122U (en) | 1988-06-13 | 1988-06-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01181122U (en) |
-
1988
- 1988-06-13 JP JP7793188U patent/JPH01181122U/ja active Pending