JPH0250820U - - Google Patents
Info
- Publication number
- JPH0250820U JPH0250820U JP12777288U JP12777288U JPH0250820U JP H0250820 U JPH0250820 U JP H0250820U JP 12777288 U JP12777288 U JP 12777288U JP 12777288 U JP12777288 U JP 12777288U JP H0250820 U JPH0250820 U JP H0250820U
- Authority
- JP
- Japan
- Prior art keywords
- leaf spring
- movable member
- condenser lens
- intermediate movable
- optical sensor
- 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 4
- 238000006073 displacement reaction Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
第１図Ａは本考案のレンズ駆動装置の上面図、
同図Ｂはトラツキング用板バネを一部省略して示
す側面図、第２図は光センサの出力特性図、第３
図は従来の代表的なレンズ駆動装置の部分切截側
面図である。
１０……レンズ駆動装置、１１……トラツキン
グ用板バネ（第２の板バネ）、１２……フオーカ
ス用板バネ（第１の板バネ）、１３……筐体、１
４……中間可動部材、１５……反射型光センサ、
１６……マグネツト、１７……レンズホルダ、１
８……取付け板、Ｌ……集光レンズ。
FIG. 1A is a top view of the lens driving device of the present invention;
Figure B is a side view with the tracking leaf spring partially omitted; Figure 2 is an output characteristic diagram of the optical sensor;
The figure is a partially cutaway side view of a typical conventional lens driving device. DESCRIPTION OF SYMBOLS 10... Lens drive device, 11... Tracking plate spring (second plate spring), 12... Focusing plate spring (first plate spring), 13... Housing, 1
4... Intermediate movable member, 15... Reflective optical sensor,
16...Magnet, 17...Lens holder, 1
8...Mounting plate, L...Condensing lens.
Claims (1)
集光レンズをフオーカシング方向及びトラツキン
グ方向に位置制御させるレンズ駆動装置において
、上記集光レンズをフオーカシング方向に変位可
能に保持する第１の板バネと、該第１の板バネの
一端を固定する中間可動部材と、該中間可動部材
を上記第１の板バネの変位方向に対して直角方向
に揺動可能に支持する第２の板バネと、該第２の
板バネの一端を固定する筐体と、該筐体側に固定
され、上記中間可動部材近傍に該第２の板バネに
対向して取付けられた反射型光センサとを少なく
とも有し、該反射型光センサによつて該第２の板
バネの変位量を検出することにより、上記集光レ
ンズのトラツキング方向の位置誤差を検出するよ
う構成したことを特徴とするレンズ駆動装置。 In a lens driving device that controls the position of a condenser lens that condenses light from a light source onto a surface of an information recording medium in a focusing direction and a tracking direction, a first leaf spring that holds the condenser lens movably in a focusing direction; , an intermediate movable member that fixes one end of the first leaf spring, and a second leaf spring that supports the intermediate movable member so as to be swingable in a direction perpendicular to the displacement direction of the first leaf spring; It has at least a casing for fixing one end of the second leaf spring, and a reflective optical sensor fixed to the casing side and mounted near the intermediate movable member facing the second leaf spring. . A lens driving device, characterized in that the reflective optical sensor detects a displacement amount of the second leaf spring to detect a positional error of the condenser lens in the tracking direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12777288U JPH0250820U (en) | 1988-09-29 | 1988-09-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12777288U JPH0250820U (en) | 1988-09-29 | 1988-09-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0250820U true JPH0250820U (en) | 1990-04-10 |
Family
ID=31380500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12777288U Pending JPH0250820U (en) | 1988-09-29 | 1988-09-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0250820U (en) |
-
1988
- 1988-09-29 JP JP12777288U patent/JPH0250820U/ja active Pending
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