JPH0268319U - - Google Patents
Info
- Publication number
- JPH0268319U JPH0268319U JP14587188U JP14587188U JPH0268319U JP H0268319 U JPH0268319 U JP H0268319U JP 14587188 U JP14587188 U JP 14587188U JP 14587188 U JP14587188 U JP 14587188U JP H0268319 U JPH0268319 U JP H0268319U
- Authority
- JP
- Japan
- Prior art keywords
- light
- recording medium
- information recording
- receiving element
- optical
- 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 14
- 239000004065 semiconductor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 7
Description
第１図は本考案の第一の実施例を示す説明図、
第２図はその第二の実施例を示す説明図、第３図
は従来例を示す説明図、第４図はその全体構成を
示す側面図、第５図はそのキヤリツジ部分の概平
面図、第６図ａ，ｂ，ｃはトラツクエラー信号の
検出原理を示す説明図、第７図ａ，ｂ，ｃ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ａ，ｂ，ｃはそのフオーカス受光素子の平面図
、第９図はトラツクエラー信号を検出する際に光
軸ズレが生じた場合の様子を示す説明図、第１０
図ａはフオーカスエラー信号を検出する際に光軸
ズレが生じた場合の様子を示す説明図、第１０図
ｂはそのフオーカス受光素子の平面図である。
２…半導体レーザ、４…偏光ビームスプリツタ
、１６…偏向プリズム、１７…対物レンズ、１８
…光情報記録媒体、１９…サーボ光学系、２０…
トラツク受光素子、２１…フオーカス受光素子、
２８…偏向部材、２９，３０…集光部材、Ｑ，Ｒ
…集光点。
FIG. 1 is an explanatory diagram showing a first embodiment of the present invention;
Fig. 2 is an explanatory diagram showing the second embodiment, Fig. 3 is an explanatory diagram showing the conventional example, Fig. 4 is a side view showing the overall configuration, Fig. 5 is a schematic plan view of the carriage part, Figures 6a, b, and c are explanatory diagrams showing the principle of detecting a track error signal. Figures 7a, b, and c are explanatory diagrams showing the principle of detecting a focus error signal.
Figures a, b, and c are plan views of the focus light-receiving element, Figure 9 is an explanatory diagram showing what happens when optical axis deviation occurs when detecting a track error signal, and Figure 10
FIG. 10A is an explanatory diagram showing the situation when an optical axis shift occurs when detecting a focus error signal, and FIG. 10B is a plan view of the focus light receiving element. 2... Semiconductor laser, 4... Polarizing beam splitter, 16... Deflection prism, 17... Objective lens, 18
...Optical information recording medium, 19... Servo optical system, 20...
Track light receiving element, 21...Focus light receiving element,
28... Deflection member, 29, 30... Condensing member, Q, R
...Focusing point.
Claims (1)
ームスプリツタを透過させ、その後偏向プリズム
、対物レンズを順次介して光情報記録媒体に照射
することにより情報の記録、再生を行うと共に、
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させサーボ光学系のトラ
ツク受光素子やフオーカス受光素子に導きトラツ
キングサーボやフオーカスサーボを行う光情報記
録媒体駆動装置において、前記偏光ビームスプリ
ツタと前記偏向プリズムとの間の光路上に集光部
材を配設し、この集光部材と前記偏向プリズムと
の間の光路上に偏向部材を回動自在に配設し、前
記光情報記録媒体からの反射光が前記集光部材に
より反射され前記サーボ光学系の光路上に集光さ
れる集光点の近傍に前記トラツク受光素子及び前
記フオーカス受光素子を配設したことを特徴とす
る光情報記録媒体駆動装置。 Laser light emitted from a semiconductor laser is transmitted through a polarizing beam splitter, and then irradiated onto an optical information recording medium through a polarizing prism and an objective lens, thereby recording and reproducing information.
In an optical information recording medium driving device that performs tracking servo or focus servo by reflecting the reflected light from the optical information recording medium by the polarizing beam splitter and guiding it to a track light receiving element or a focus light receiving element of a servo optical system, the polarized light A condensing member is disposed on the optical path between the beam splitter and the deflection prism, a deflection member is rotatably disposed on the optical path between the condensing member and the deflection prism, and the deflection member is rotatably disposed on the optical path between the beam splitter and the deflection prism. The track light-receiving element and the focus light-receiving element are arranged near a light-converging point where reflected light from the information recording medium is reflected by the light-collecting member and focused onto the optical path of the servo optical system. Optical information recording medium drive device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14587188U JPH0268319U (en) | 1988-11-08 | 1988-11-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14587188U JPH0268319U (en) | 1988-11-08 | 1988-11-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0268319U true JPH0268319U (en) | 1990-05-23 |
Family
ID=31414842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14587188U Pending JPH0268319U (en) | 1988-11-08 | 1988-11-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0268319U (en) |
-
1988
- 1988-11-08 JP JP14587188U patent/JPH0268319U/ja active Pending
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