JPS6424523U - - Google Patents
Info
- Publication number
- JPS6424523U JPS6424523U JP11947887U JP11947887U JPS6424523U JP S6424523 U JPS6424523 U JP S6424523U JP 11947887 U JP11947887 U JP 11947887U JP 11947887 U JP11947887 U JP 11947887U JP S6424523 U JPS6424523 U JP S6424523U
- Authority
- JP
- Japan
- Prior art keywords
- beam splitter
- polarizing beam
- light
- recording medium
- pickup 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Head (AREA)
- Mounting And Adjusting Of Optical Elements (AREA)
Description
第１図はこの考案の一実施例を示す偏光ビーム
スプリツタ部分の斜視図、第２図はその縦断側面
図、第３図は従来例を示す斜視図、第４図はその
偏光ビームスプリツタ部分の斜視図、第５図は光
検出原理を示す斜視図、第６図はその偏光ビーム
スプリツタが角度θだけ位置ズレした場合の状態
を示す説明図、第７図はフオーカスエラー信号の
検出原理を示す説明図、第８図はトラツクエラー
信号の検出原理を示す説明図である。
１……偏光ビームスプリツタ、２……偏光ビー
ムスプリツタホルダ、５……半導体レーザ、２３
……光デイスク（記録媒体）、１３……フオーカ
ス受光素子（光検出素子）、２４……トラツク受
光素子（光検出素子）、２５……偏光ビームスプ
リツタホルダ、２７……基準面、２９……圧縮コ
イルバネ（バネ部材）。
Fig. 1 is a perspective view of a polarizing beam splitter showing an embodiment of this invention, Fig. 2 is a vertical side view thereof, Fig. 3 is a perspective view showing a conventional example, and Fig. 4 is a polarizing beam splitter thereof. FIG. 5 is a perspective view showing the principle of photodetection, FIG. 6 is an explanatory diagram showing the state when the polarizing beam splitter is misaligned by an angle θ, and FIG. 7 is a diagram showing the focus error signal. FIG. 8 is an explanatory diagram showing the principle of detection of a track error signal. 1... Polarizing beam splitter, 2... Polarizing beam splitter holder, 5... Semiconductor laser, 23
. . . Optical disk (recording medium), 13 . . . Focus light receiving element (photo detection element), 24 . ...Compression coil spring (spring member).
Claims (1)
ツタに導き、その透過光を記録媒体に照射して情
報の記録、再生を行うと共に、その記録媒体から
の反射光を偏光ビームスプリツタホルダに取付け
られた前記偏光ビームスプリツタによつて分光し
、その分光された光を光検出素子により検出して
前記記録媒体の基準位置からのズレを検出する光
ピツクアツプ装置において、前記偏光ビームスプ
リツタホルダに前記偏光ビームスプリツタの一側
面が接する基準面を形成し、前記偏光ビームスプ
リツタをバネ部材により前記基準面に圧接したこ
とを特徴とする光ピツクアツプ装置。 The light emitted from the semiconductor laser is guided to a polarizing beam splitter, and the transmitted light is irradiated onto a recording medium to record and reproduce information, and the reflected light from the recording medium is transmitted to a polarizing beam splitter attached to a polarizing beam splitter holder. In the optical pickup device, the polarized beam splitter splits the light and the split light is detected by a photodetection element to detect a deviation of the recording medium from a reference position. An optical pickup device characterized in that a reference surface is formed with which one side of a beam splitter contacts, and the polarizing beam splitter is pressed against the reference surface by a spring member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11947887U JPS6424523U (en) | 1987-08-04 | 1987-08-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11947887U JPS6424523U (en) | 1987-08-04 | 1987-08-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6424523U true JPS6424523U (en) | 1989-02-09 |
Family
ID=31364744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11947887U Pending JPS6424523U (en) | 1987-08-04 | 1987-08-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6424523U (en) |
-
1987
- 1987-08-04 JP JP11947887U patent/JPS6424523U/ja active Pending
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