JPH0226129U - - Google Patents
Info
- Publication number
- JPH0226129U JPH0226129U JP10051388U JP10051388U JPH0226129U JP H0226129 U JPH0226129 U JP H0226129U JP 10051388 U JP10051388 U JP 10051388U JP 10051388 U JP10051388 U JP 10051388U JP H0226129 U JPH0226129 U JP H0226129U
- Authority
- JP
- Japan
- Prior art keywords
- light
- optical
- information recording
- receiving element
- servo
- 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 13
- 239000004065 semiconductor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
Description
第１図は本考案の一実施例を示す平面図、第２
図ａ，ｂはそのトラツク受光素子に照射される光
のスポツト状態を示す説明図、第３図は従来例を
示す平面図、第４図ａ，ｂはそのトラツク受光素
子に照射される光のスポツト状態を示す説明図、
第５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６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である。
１……半導体レーザ、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
、７……サーボ光学系、１０……フオーカス受光
素子、１１……トラツク受光素子、１２……高反
射率面。
Figure 1 is a plan view showing one embodiment of the present invention;
Figures a and b are explanatory diagrams showing the spot state of the light irradiated to the track light receiving element, Figure 3 is a plan view showing the conventional example, and Figures 4 a and b are illustrations of the spot state of the light irradiated to the track light receiving element. An explanatory diagram showing the spot condition,
FIGS. 5a and 5b are explanatory diagrams showing the principle of detecting a track error signal, and FIGS. 6a, b, and c are explanatory diagrams showing the principle of detecting a focus error signal. DESCRIPTION OF SYMBOLS 1... Semiconductor laser, 3... Polarizing beam splitter, 5... Objective lens, 6... Optical information recording medium, 7... Servo optical system, 10... Focus light receiving element, 11... Track light receiving element, 12 ...High reflectance surface.
Claims (1)
プリツタを介して対物レンズにより集光させ光情
報記録媒体に照射して情報の記録、再生を行うと
共に、この光情報記録媒体からの反射光を前記偏
向ビームスプリツタを介してサーボ光学系に導き
フオーカスサーボやトラツキングサーボを行う光
情報記録再生装置において、前記光情報記録装置
において、前記光情報記録媒体からの反射光が前
記偏光ビームスプリツタを介して前記サーボ光学
系に導かれる光路上に、一部に高反射率面を有す
るトラツク受光素子を設け、このトラツク受光素
子のトラツク受光素子の前記高反射率面により反
射された光の光路上にフオーカス受光素子を設け
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 focused by an objective lens through a polarizing beam splitter and irradiated onto an optical information recording medium to record and reproduce information, and the reflected light from this optical information recording medium is polarized. In an optical information recording/reproducing device that performs focus servo or tracking servo by guiding light to a servo optical system via a beam splitter, in the optical information recording device, reflected light from the optical information recording medium passes through the polarizing beam splitter. A track light receiving element having a high reflectance surface is provided in part on the optical path guided to the servo optical system through the optical path, and the optical path of the light reflected by the high reflectance surface of the track light receiving element of the track light receiving element is provided. An optical pickup device characterized in that a focus light-receiving element is provided at the top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10051388U JPH0226129U (en) | 1988-07-28 | 1988-07-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10051388U JPH0226129U (en) | 1988-07-28 | 1988-07-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0226129U true JPH0226129U (en) | 1990-02-21 |
Family
ID=31328655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10051388U Pending JPH0226129U (en) | 1988-07-28 | 1988-07-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0226129U (en) |
-
1988
- 1988-07-28 JP JP10051388U patent/JPH0226129U/ja active Pending
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