JPS6478442A - Optical pickup device - Google Patents
Optical pickup deviceInfo
- Publication number
- JPS6478442A JPS6478442A JP62235438A JP23543887A JPS6478442A JP S6478442 A JPS6478442 A JP S6478442A JP 62235438 A JP62235438 A JP 62235438A JP 23543887 A JP23543887 A JP 23543887A JP S6478442 A JPS6478442 A JP S6478442A
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- astigmatic difference
- signal
- constitution
- reliability
- 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
Landscapes
- Optical Head (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62235438A JPS6478442A (en) | 1987-09-18 | 1987-09-18 | Optical pickup device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62235438A JPS6478442A (en) | 1987-09-18 | 1987-09-18 | Optical pickup device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6478442A true JPS6478442A (en) | 1989-03-23 |
Family
ID=16986112
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62235438A Pending JPS6478442A (en) | 1987-09-18 | 1987-09-18 | Optical pickup device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6478442A (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001048749A1 (fr) * | 1999-12-27 | 2001-07-05 | Sony Corporation | Tete optique, dispositif emetteur/recepteur de lumiere et appareil d'enregistrement lecture sur un support optique |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62132247A (ja) * | 1985-12-04 | 1987-06-15 | Mitsubishi Electric Corp | 光学ヘツド装置 |
-
1987
- 1987-09-18 JP JP62235438A patent/JPS6478442A/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62132247A (ja) * | 1985-12-04 | 1987-06-15 | Mitsubishi Electric Corp | 光学ヘツド装置 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001048749A1 (fr) * | 1999-12-27 | 2001-07-05 | Sony Corporation | Tete optique, dispositif emetteur/recepteur de lumiere et appareil d'enregistrement lecture sur un support optique |
US6940789B2 (en) | 1999-12-27 | 2005-09-06 | Sony Corporation | Optical pickup device that corrects the spot shape of reflected light beams |
US7095687B2 (en) | 1999-12-27 | 2006-08-22 | Sony Corporation | Optical pickup device that corrects the spot shape of reflected light beams |
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