JPS63157819U - - Google Patents
Info
- Publication number
- JPS63157819U JPS63157819U JP4961687U JP4961687U JPS63157819U JP S63157819 U JPS63157819 U JP S63157819U JP 4961687 U JP4961687 U JP 4961687U JP 4961687 U JP4961687 U JP 4961687U JP S63157819 U JPS63157819 U JP S63157819U
- Authority
- JP
- Japan
- Prior art keywords
- photodetectors
- output
- pair
- focus error
- magneto
- 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
- 239000000758 substrate Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
Landscapes
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4961687U JPS63157819U (US20020193084A1-20021219-M00002.png) | 1987-03-31 | 1987-03-31 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4961687U JPS63157819U (US20020193084A1-20021219-M00002.png) | 1987-03-31 | 1987-03-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63157819U true JPS63157819U (US20020193084A1-20021219-M00002.png) | 1988-10-17 |
Family
ID=30872233
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4961687U Pending JPS63157819U (US20020193084A1-20021219-M00002.png) | 1987-03-31 | 1987-03-31 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63157819U (US20020193084A1-20021219-M00002.png) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60212835A (ja) * | 1984-04-09 | 1985-10-25 | Mitsubishi Electric Corp | 光学式情報記録再生装置 |
JPS61175939A (ja) * | 1985-01-29 | 1986-08-07 | Matsushita Electric Ind Co Ltd | 焦点検出装置 |
JPS61206944A (ja) * | 1985-03-11 | 1986-09-13 | Hitachi Ltd | 光磁気ディスク用の信号検出装置 |
-
1987
- 1987-03-31 JP JP4961687U patent/JPS63157819U/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60212835A (ja) * | 1984-04-09 | 1985-10-25 | Mitsubishi Electric Corp | 光学式情報記録再生装置 |
JPS61175939A (ja) * | 1985-01-29 | 1986-08-07 | Matsushita Electric Ind Co Ltd | 焦点検出装置 |
JPS61206944A (ja) * | 1985-03-11 | 1986-09-13 | Hitachi Ltd | 光磁気ディスク用の信号検出装置 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPH035936A (ja) | 光フアイバ形光磁気ヘッド | |
KR870004423A (ko) | 광 헤 드 | |
JPS57169947A (en) | Magnetic optical head | |
JPS63157819U (US20020193084A1-20021219-M00002.png) | ||
JPS63269325A (ja) | 光学ヘツド | |
JPS63157818U (US20020193084A1-20021219-M00002.png) | ||
JPH0766548B2 (ja) | フオ−カス検出装置 | |
US5939710A (en) | Optical pickup system incorporating therein a beam splitter having a phase layer | |
JP2625738B2 (ja) | 光学ヘッド | |
JPH03254439A (ja) | 光学式情報記録担体及びその記録再生装置 | |
JP2570325B2 (ja) | 光学ヘッド | |
JPH1069666A (ja) | 光ピックアップシステム | |
JP3166783B2 (ja) | 光ヘッド | |
JP2659239B2 (ja) | 光ヘッド | |
JPH02168205A (ja) | 複合プリズム | |
JPS59146458A (ja) | 光学的記録再生装置 | |
JPS6332315U (US20020193084A1-20021219-M00002.png) | ||
JPS60135818U (ja) | フオ−カス誤差検出装置 | |
JPH0413229A (ja) | 光学的情報記録再生装置 | |
JPS61195522U (US20020193084A1-20021219-M00002.png) | ||
JPS63292432A (ja) | 光学ピックアップ装置 | |
JPH0296629U (US20020193084A1-20021219-M00002.png) | ||
JPS6396620U (US20020193084A1-20021219-M00002.png) | ||
JPH04351721A (ja) | 光ピックアップ装置 | |
JPH04332919A (ja) | 光学的記録情報の再生方式 |