JPH01121120U - - Google Patents
Info
- Publication number
- JPH01121120U JPH01121120U JP1681288U JP1681288U JPH01121120U JP H01121120 U JPH01121120 U JP H01121120U JP 1681288 U JP1681288 U JP 1681288U JP 1681288 U JP1681288 U JP 1681288U JP H01121120 U JPH01121120 U JP H01121120U
- Authority
- JP
- Japan
- Prior art keywords
- focusing lens
- focus error
- detection device
- error detection
- split photodetector
- 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 4
- 230000003287 optical effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1681288U JPH01121120U (uk) | 1988-02-10 | 1988-02-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1681288U JPH01121120U (uk) | 1988-02-10 | 1988-02-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01121120U true JPH01121120U (uk) | 1989-08-16 |
Family
ID=31230061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1681288U Pending JPH01121120U (uk) | 1988-02-10 | 1988-02-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01121120U (uk) |
-
1988
- 1988-02-10 JP JP1681288U patent/JPH01121120U/ja active Pending
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