JPH0226126U - - Google Patents
Info
- Publication number
- JPH0226126U JPH0226126U JP10262988U JP10262988U JPH0226126U JP H0226126 U JPH0226126 U JP H0226126U JP 10262988 U JP10262988 U JP 10262988U JP 10262988 U JP10262988 U JP 10262988U JP H0226126 U JPH0226126 U JP H0226126U
- Authority
- JP
- Japan
- Prior art keywords
- light
- information recording
- objective lens
- track
- optical information
- 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 11
- 239000004065 semiconductor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
第１図は本考案の一実施例を示すトラツク受光
素子の平面図、第２図ａ，ｂはその受光面により
検出される信号の回路図、第３図ａ，ｂはその検
出された信号をもとに駆動する回路のブロツク図
、第４図はその検出された信号をもとに駆動する
回路の側面図、第５図ａ，ｂは対物レンズが光軸
ズレしておらずトラツクのみが位置ズレする前後
の様子を示す説明図、第６図ａ，ｂは対物レンズ
が光軸ズレしている場合の様子を示す説明図、第
７図は従来例を示す平面図、第８図はそのトラツ
ク受光素子の正面図、第９図はトラツクが位置ズ
レする前後の様子を示す説明図、第１０図は対物
レンズが位置ズレした場合の様子を示す説明図で
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
、８，１１……トラツク受光素子、１２……第一
受光部、１３……第二受光部、１６……対物レン
ズ位置制御手段、Ｄ……分割線、Ｔ……トラツク
。
Figure 1 is a plan view of a track light receiving element showing an embodiment of the present invention, Figures 2a and b are circuit diagrams of signals detected by the light receiving surface, and Figures 3a and b are the detected signals. Figure 4 is a side view of the circuit that drives the lens based on the detected signal. Figures 5a and b show the objective lens with no optical axis deviation and only the track. 6a and b are explanatory diagrams showing the situation when the optical axis of the objective lens is misaligned. FIG. 7 is a plan view showing the conventional example. FIG. 8 9 is a front view of the track light receiving element, FIG. 9 is an explanatory diagram showing the state before and after the track is displaced, and FIG. 10 is an explanatory diagram showing the state when the objective lens is displaced. DESCRIPTION OF SYMBOLS 1... Semiconductor laser, 3... Polarizing beam splitter, 5... Objective lens, 6... Optical information recording medium, 8, 11... Track light receiving element, 12... First light receiving section, 13... Second Light receiving section, 16...Objective lens position control means, D...Dividing line, T...Track.
Claims (1)
プ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を介してサーボ光
学系のトラツク受光素子やフオーカス受光素子に
導くことにより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再生装置において、前記
光情報記録媒体からの反射光が照射される前記ト
ラツク受光素子に、その反射光のスポツトと同一
径をなし前記光情報記録媒体のトラツクと同一方
向に分割線により分割された第一受光部を形成し
、この第一受光部の周囲に前記分割線により分割
された第二受光部を形成し、このトラツク受光素
子により検出された対物レンズ位置信号をもとに
対物レンズの光軸ズレを補正する対物レンズ位置
制御手段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 condensed by an objective lens via a polarizing beam splitter and irradiated onto an optical information recording medium to record and reproduce information, and the reflected light from the optical information recording medium is In an optical information recording/reproducing apparatus that performs tracking servo or focus servo by guiding light to a track light receiving element or a focus light receiving element of a servo optical system through the polarizing beam splitter, reflected light from the optical information recording medium is irradiated. A first light-receiving section is formed in the track light-receiving element, which has the same diameter as the spot of the reflected light and is divided by a dividing line in the same direction as the track of the optical information recording medium, and the periphery of the first light-receiving section is A second light receiving section divided by the dividing line is formed in the second light receiving section, and objective lens position control means is provided for correcting optical axis deviation of the objective lens based on the objective lens position signal detected by the track light receiving element. An optical pickup device featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10262988U JPH0226126U (en) | 1988-08-02 | 1988-08-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10262988U JPH0226126U (en) | 1988-08-02 | 1988-08-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0226126U true JPH0226126U (en) | 1990-02-21 |
Family
ID=31332711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10262988U Pending JPH0226126U (en) | 1988-08-02 | 1988-08-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0226126U (en) |
-
1988
- 1988-08-02 JP JP10262988U patent/JPH0226126U/ja active Pending
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