JPS63193218U - - Google Patents
Info
- Publication number
- JPS63193218U JPS63193218U JP8206387U JP8206387U JPS63193218U JP S63193218 U JPS63193218 U JP S63193218U JP 8206387 U JP8206387 U JP 8206387U JP 8206387 U JP8206387 U JP 8206387U JP S63193218 U JPS63193218 U JP S63193218U
- Authority
- JP
- Japan
- Prior art keywords
- light
- detection
- focus error
- optical
- objective lens
- 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 17
- 230000003287 optical effect Effects 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8206387U JPS63193218U (cs) | 1987-05-28 | 1987-05-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8206387U JPS63193218U (cs) | 1987-05-28 | 1987-05-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63193218U true JPS63193218U (cs) | 1988-12-13 |
Family
ID=30934377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8206387U Pending JPS63193218U (cs) | 1987-05-28 | 1987-05-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63193218U (cs) |
-
1987
- 1987-05-28 JP JP8206387U patent/JPS63193218U/ja active Pending
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