JPH01107016U - - Google Patents
Info
- Publication number
- JPH01107016U JPH01107016U JP14388U JP14388U JPH01107016U JP H01107016 U JPH01107016 U JP H01107016U JP 14388 U JP14388 U JP 14388U JP 14388 U JP14388 U JP 14388U JP H01107016 U JPH01107016 U JP H01107016U
- Authority
- JP
- Japan
- Prior art keywords
- movable part
- objective lens
- fixed part
- light
- facing
- 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
- 230000004907 flux Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 1
Description
第１図は本考案のピツクアツプ装置の概略を示
す上面図、第２図は光ピツクアツプ装置の斜視図
、第３図は第２図の断面図、第４図は反射光と受
光素子の位置関係を示す配置図、第５図ａ，ｂ，
ｃは反射光と受光素子の関係を示す図、第６図は
出力信号と対物レンズの関係を示す図、第７図ａ
，ｂ，ｃは他の実施例における出力信号と対物レ
ンズの関係を示す図、第８図は複数の受光素子を
使用する例を示図、第９図は第８図により発生す
る出力信号の状態を明らかにした図、第１０図は
従来例を示す図である。
Fig. 1 is a top view schematically showing the pick-up device of the present invention, Fig. 2 is a perspective view of the optical pick-up device, Fig. 3 is a sectional view of Fig. 2, and Fig. 4 is the positional relationship between reflected light and the light receiving element. Layout diagram showing Figure 5 a, b,
c is a diagram showing the relationship between reflected light and the light receiving element, Figure 6 is a diagram showing the relationship between the output signal and the objective lens, and Figure 7a
, b, c are diagrams showing the relationship between the output signal and the objective lens in other embodiments, FIG. 8 is a diagram showing an example in which a plurality of light receiving elements are used, and FIG. FIG. 10, which clarifies the state, is a diagram showing a conventional example.
Claims (1)
この可動部に設置する対物レンズと、可動部に取
付ける固定部と、対物レンズに対向する固定部に
形成する透孔と、この透孔に対応して配置し対物
レンズの有効径より大きい光束を持つレーザと、
可動部に設置する反射板と、この反射光を受光可
能な固定部に配置する受光素子を具備することを
特徴とする位置検出器。 a movable part disposed facing the information recording medium;
An objective lens installed on the movable part, a fixed part attached to the movable part, a through hole formed in the fixed part facing the objective lens, and a light flux larger than the effective diameter of the objective lens arranged corresponding to the through hole. A laser with
A position detector comprising a reflecting plate installed on a movable part and a light receiving element placed on a fixed part capable of receiving the reflected light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14388U JPH01107016U (en) | 1988-01-06 | 1988-01-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14388U JPH01107016U (en) | 1988-01-06 | 1988-01-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01107016U true JPH01107016U (en) | 1989-07-19 |
Family
ID=31198909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14388U Pending JPH01107016U (en) | 1988-01-06 | 1988-01-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01107016U (en) |
-
1988
- 1988-01-06 JP JP14388U patent/JPH01107016U/ja active Pending
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