JPH0268318U - - Google Patents
Info
- Publication number
- JPH0268318U JPH0268318U JP14899588U JP14899588U JPH0268318U JP H0268318 U JPH0268318 U JP H0268318U JP 14899588 U JP14899588 U JP 14899588U JP 14899588 U JP14899588 U JP 14899588U JP H0268318 U JPH0268318 U JP H0268318U
- Authority
- JP
- Japan
- Prior art keywords
- optical pickup
- focus error
- envelope
- converging
- light beam
- 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
- 230000003287 optical effect Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14899588U JPH0268318U (pt) | 1988-11-15 | 1988-11-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14899588U JPH0268318U (pt) | 1988-11-15 | 1988-11-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0268318U true JPH0268318U (pt) | 1990-05-23 |
Family
ID=31420816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14899588U Pending JPH0268318U (pt) | 1988-11-15 | 1988-11-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0268318U (pt) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57208642A (en) * | 1981-06-18 | 1982-12-21 | Toshiba Corp | Focus controller |
| JPS5984352A (ja) * | 1982-11-05 | 1984-05-16 | Mitsubishi Electric Corp | 焦点誤差検出装置 |
| JPS60171643A (ja) * | 1984-02-17 | 1985-09-05 | Mitsubishi Electric Corp | 光デイスクヘツドのフオ−カスずれ検出装置 |
-
1988
- 1988-11-15 JP JP14899588U patent/JPH0268318U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57208642A (en) * | 1981-06-18 | 1982-12-21 | Toshiba Corp | Focus controller |
| JPS5984352A (ja) * | 1982-11-05 | 1984-05-16 | Mitsubishi Electric Corp | 焦点誤差検出装置 |
| JPS60171643A (ja) * | 1984-02-17 | 1985-09-05 | Mitsubishi Electric Corp | 光デイスクヘツドのフオ−カスずれ検出装置 |