JPH02140625U - - Google Patents
Info
- Publication number
- JPH02140625U JPH02140625U JP4835589U JP4835589U JPH02140625U JP H02140625 U JPH02140625 U JP H02140625U JP 4835589 U JP4835589 U JP 4835589U JP 4835589 U JP4835589 U JP 4835589U JP H02140625 U JPH02140625 U JP H02140625U
- Authority
- JP
- Japan
- Prior art keywords
- light
- optical
- light receiving
- optical path
- disposed
- 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 17
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Description
第１図は本考案の一実施例を示す構成図、第２
図はその受光素子の表面形状を示す正面図、第３
図は信号処理回路の様子を示す回路図、第４図は
従来の光ピツクアツプ装置を示す構成図、第５図
はそのトラツク受光素子の正面図、第６図ａ，ｂ
はトラツクエラー信号の検出原理を示す説明図、
第７図は対物レンズの光軸ズレを補正する様子を
示す説明図である。
１…レーザ光源、３…偏光ビームスプリツタ、
５…対物レンズ、６…光情報記録媒体、８…信号
検出光学系、９…集光レンズ、１０…光路分離部
材、１１，１２…受光素子、Ｐ，Ｑ…集光点。
Fig. 1 is a configuration diagram showing one embodiment of the present invention;
The figure is a front view showing the surface shape of the light receiving element.
Figure 4 is a circuit diagram showing the state of the signal processing circuit, Figure 4 is a configuration diagram showing a conventional optical pickup device, Figure 5 is a front view of the track light receiving element, and Figures 6 a and b.
is an explanatory diagram showing the principle of detecting the track error signal,
FIG. 7 is an explanatory diagram showing how the optical axis deviation of the objective lens is corrected. 1... Laser light source, 3... Polarizing beam splitter,
5... Objective lens, 6... Optical information recording medium, 8... Signal detection optical system, 9... Condensing lens, 10... Optical path separation member, 11, 12... Light receiving element, P, Q... Focusing point.
Claims (1)
リツタを介して対物レンズにより集光して光情報
記録媒体に導き情報の記録を行うと共に、その光
情報記録媒体からの反射光を前記偏光ビームスプ
リツタにより反射して信号検出光学系に導きトラ
ツクエラー信号やフオーカスエラー信号の検出を
行う光ピツクアツプ装置において、前記光情報記
録媒体からの前記反射光が前記偏光ビームスプリ
ツタにより反射され前記信号検出光学系内に導か
れることにより形成された光路上に集光レンズを
配設し、この集光レンズにより集光された光の光
路上に光路分離部材を配設し、この光路分離部材
により分離された一方の光路上の集光点の前方に
位置させて少なくとも４分割された受光面を有す
る受光素子を配設すると共に、他方の光路上の集
光点の後方に位置させて少なくとも４分割された
受光面を有する受光素子を配設したことを特徴と
する光ピツクアツプ装置。 The light emitted from the laser light source is condensed by an objective lens via a polarizing beam splitter and guided to an optical information recording medium to record information, and the reflected light from the optical information recording medium is sent to the polarizing beam splitter. In an optical pickup device, the reflected light from the optical information recording medium is reflected by the polarizing beam splitter and guided to the signal detection optical system to detect a track error signal or a focus error signal. A condensing lens is disposed on the optical path formed by being guided into the system, an optical path separating member is disposed on the optical path of the light condensed by the condensing lens, and the light is separated by the optical path separating member. A light receiving element having a light receiving surface divided into at least four parts is disposed in front of the light converging point on one optical path, and a light receiving element having a light receiving surface divided into at least four parts is located behind the light condensing point on the other optical path. An optical pickup device characterized in that a light receiving element having a light receiving surface is disposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4835589U JPH02140625U (en) | 1989-04-25 | 1989-04-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4835589U JPH02140625U (en) | 1989-04-25 | 1989-04-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02140625U true JPH02140625U (en) | 1990-11-26 |
Family
ID=31565087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4835589U Pending JPH02140625U (en) | 1989-04-25 | 1989-04-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02140625U (en) |
-
1989
- 1989-04-25 JP JP4835589U patent/JPH02140625U/ja active Pending
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