JPS63173719U - - Google Patents
Info
- Publication number
- JPS63173719U JPS63173719U JP6558487U JP6558487U JPS63173719U JP S63173719 U JPS63173719 U JP S63173719U JP 6558487 U JP6558487 U JP 6558487U JP 6558487 U JP6558487 U JP 6558487U JP S63173719 U JPS63173719 U JP S63173719U
- Authority
- JP
- Japan
- Prior art keywords
- receiving element
- light
- light receiving
- detecting
- beam splitter
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims description 5
- 230000004907 flux Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 2
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案の一実施例の光路図、第２図ａ
，ｂはプツシユプル信号低減用の光束制限部材の
例、第３図は従来の主要部の光路図、である。
主要部分の符号の説明、７……光束制限部材。
Figure 1 is an optical path diagram of an embodiment of the present invention, Figure 2 a
, b are examples of a light flux limiting member for reducing push-pull signals, and FIG. 3 is an optical path diagram of the conventional main part. Explanation of symbols of main parts: 7...Light flux limiting member.
Claims (1)
リツターで分離し、一方の光をフオーカスエラー
検出用受光素子に導き、他方の光をプツシユプル
法によるトラツクエラー検出用受光素子に導く如
く構成されたエラー検出部を有する光学ヘツドに
おいて、 前記ビームスプリツターと前記フオーカスエラ
ー検出用受光素子との間にプツシユプル信号を低
減せしめる光束制限部材を配置したことを特徴と
する光学ヘツド。[Claims for Utility Model Registration] The reflected light from an optical information recording medium is separated by a beam splitter, one of the lights is guided to a light receiving element for detecting a focus error, and the other light is used for detecting a track error using a push-pull method. An optical head having an error detection section configured to lead to a light receiving element, characterized in that a light flux limiting member for reducing push-pull signals is disposed between the beam splitter and the focus error detection light receiving element. optical head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987065584U JP2504893Y2 (en) | 1987-04-30 | 1987-04-30 | Optical head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987065584U JP2504893Y2 (en) | 1987-04-30 | 1987-04-30 | Optical head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63173719U true JPS63173719U (en) | 1988-11-11 |
| JP2504893Y2 JP2504893Y2 (en) | 1996-07-24 |
Family
ID=30902795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987065584U Expired - Lifetime JP2504893Y2 (en) | 1987-04-30 | 1987-04-30 | Optical head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2504893Y2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5870431A (en) * | 1981-10-22 | 1983-04-26 | Toshiba Corp | Optical head |
| JPS58147821A (en) * | 1982-02-25 | 1983-09-02 | Toshiba Corp | Optical head |
| JPS59207439A (en) * | 1983-05-12 | 1984-11-24 | Nec Corp | Beam access device of optical disk system |
-
1987
- 1987-04-30 JP JP1987065584U patent/JP2504893Y2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5870431A (en) * | 1981-10-22 | 1983-04-26 | Toshiba Corp | Optical head |
| JPS58147821A (en) * | 1982-02-25 | 1983-09-02 | Toshiba Corp | Optical head |
| JPS59207439A (en) * | 1983-05-12 | 1984-11-24 | Nec Corp | Beam access device of optical disk system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2504893Y2 (en) | 1996-07-24 |
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