JPS627619U - - Google Patents
Info
- Publication number
- JPS627619U JPS627619U JP9697885U JP9697885U JPS627619U JP S627619 U JPS627619 U JP S627619U JP 9697885 U JP9697885 U JP 9697885U JP 9697885 U JP9697885 U JP 9697885U JP S627619 U JPS627619 U JP S627619U
- Authority
- JP
- Japan
- Prior art keywords
- focus error
- error detection
- light receiving
- detection circuit
- difference
- 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 13
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9697885U JPS627619U (OSRAM) | 1985-06-26 | 1985-06-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9697885U JPS627619U (OSRAM) | 1985-06-26 | 1985-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS627619U true JPS627619U (OSRAM) | 1987-01-17 |
Family
ID=30963394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9697885U Pending JPS627619U (OSRAM) | 1985-06-26 | 1985-06-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS627619U (OSRAM) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63261540A (ja) * | 1987-04-17 | 1988-10-28 | Brother Ind Ltd | トラツキングエラ−信号検出装置 |
-
1985
- 1985-06-26 JP JP9697885U patent/JPS627619U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63261540A (ja) * | 1987-04-17 | 1988-10-28 | Brother Ind Ltd | トラツキングエラ−信号検出装置 |