JP2004139728A5 - - Google Patents
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- Publication number
- JP2004139728A5 JP2004139728A5 JP2003386370A JP2003386370A JP2004139728A5 JP 2004139728 A5 JP2004139728 A5 JP 2004139728A5 JP 2003386370 A JP2003386370 A JP 2003386370A JP 2003386370 A JP2003386370 A JP 2003386370A JP 2004139728 A5 JP2004139728 A5 JP 2004139728A5
- Authority
- JP
- Japan
- Prior art keywords
- light
- group
- recording medium
- optical recording
- 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.)
- Granted
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Claims (1)
- 光源と、該光源からの出射光を光記録媒体上に集光する対物レンズと、前記光源と前記対物レンズの間に設けられた、前記光記録媒体からの反射光の光路を前記光源からの出射光の光路から分離する第一の光分離手段と、該第一の光分離手段を経た前記光記録媒体からの反射光を単一の面によりさらに第一群の光と第二群の光に分離する第二の光分離手段と、前記第一群の光と前記第二群の光を受光する光検出器を有する光ヘッド装置において、
前記第一群の光の光量が前記第二群の光の光量に比べて大きく、前記第一群の光から位相差法によるトラック誤差信号、プッシュプル法によるトラック誤差信号、および前記光記録媒体に記録された情報信号を検出し、前記第二群の光からフーコー法によるフォーカス誤差信号を検出することを特徴とする光ヘッド装置。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003386370A JP4059190B2 (ja) | 2003-11-17 | 2003-11-17 | 光ヘッド装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003386370A JP4059190B2 (ja) | 2003-11-17 | 2003-11-17 | 光ヘッド装置 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32865698A Division JP3662751B2 (ja) | 1998-11-18 | 1998-11-18 | 光ヘッド装置 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2004139728A JP2004139728A (ja) | 2004-05-13 |
| JP2004139728A5 true JP2004139728A5 (ja) | 2005-07-07 |
| JP4059190B2 JP4059190B2 (ja) | 2008-03-12 |
Family
ID=32463874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003386370A Expired - Fee Related JP4059190B2 (ja) | 2003-11-17 | 2003-11-17 | 光ヘッド装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4059190B2 (ja) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4613651B2 (ja) * | 2005-03-16 | 2011-01-19 | 旭硝子株式会社 | 階段状回折素子および光ヘッド装置 |
| WO2006115081A1 (ja) * | 2005-04-22 | 2006-11-02 | Konica Minolta Opto, Inc. | 光ピックアップ装置用対物光学素子、光ピックアップ装置用光学素子、光ピックアップ装置用対物光学素子ユニット及び光ピックアップ装置 |
| US8036092B2 (en) | 2005-08-18 | 2011-10-11 | Nec Corporation | Optical head device for detecting an error signal and an optical information recording/reproducing device |
| JP5378120B2 (ja) * | 2009-09-02 | 2013-12-25 | 株式会社日立メディアエレクトロニクス | 光ピックアップ装置及びそれを用いた光ディスク装置 |
-
2003
- 2003-11-17 JP JP2003386370A patent/JP4059190B2/ja not_active Expired - Fee Related
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