JPS62198516U - - Google Patents
Info
- Publication number
- JPS62198516U JPS62198516U JP7442487U JP7442487U JPS62198516U JP S62198516 U JPS62198516 U JP S62198516U JP 7442487 U JP7442487 U JP 7442487U JP 7442487 U JP7442487 U JP 7442487U JP S62198516 U JPS62198516 U JP S62198516U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- light
- receiving element
- focus error
- detection device
- 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
- 238000001514 detection method Methods 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims 3
- 201000009310 astigmatism Diseases 0.000 claims 1
- 230000004907 flux Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7442487U JPS62198516U (ko) | 1987-05-20 | 1987-05-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7442487U JPS62198516U (ko) | 1987-05-20 | 1987-05-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62198516U true JPS62198516U (ko) | 1987-12-17 |
Family
ID=30919628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7442487U Pending JPS62198516U (ko) | 1987-05-20 | 1987-05-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62198516U (ko) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5317705A (en) * | 1976-08-02 | 1978-02-18 | Hitachi Ltd | Automatic focusing system |
-
1987
- 1987-05-20 JP JP7442487U patent/JPS62198516U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5317705A (en) * | 1976-08-02 | 1978-02-18 | Hitachi Ltd | Automatic focusing system |
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