JPH0370859B2 - - Google Patents
Info
- Publication number
- JPH0370859B2 JPH0370859B2 JP10411983A JP10411983A JPH0370859B2 JP H0370859 B2 JPH0370859 B2 JP H0370859B2 JP 10411983 A JP10411983 A JP 10411983A JP 10411983 A JP10411983 A JP 10411983A JP H0370859 B2 JPH0370859 B2 JP H0370859B2
- Authority
- JP
- Japan
- Prior art keywords
- diffraction grating
- light
- focus
- diffracted
- tracking error
- 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.)
- Expired
Links
- 238000001514 detection method Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 description 17
- 238000010586 diagram Methods 0.000 description 8
- 239000004065 semiconductor Substances 0.000 description 4
- 201000009310 astigmatism Diseases 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10411983A JPS59231736A (ja) | 1983-06-13 | 1983-06-13 | フォーカスおよびトラッキング誤差検出装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10411983A JPS59231736A (ja) | 1983-06-13 | 1983-06-13 | フォーカスおよびトラッキング誤差検出装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59231736A JPS59231736A (ja) | 1984-12-26 |
| JPH0370859B2 true JPH0370859B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1991-11-11 |
Family
ID=14372234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10411983A Granted JPS59231736A (ja) | 1983-06-13 | 1983-06-13 | フォーカスおよびトラッキング誤差検出装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59231736A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0746439B2 (ja) * | 1985-04-09 | 1995-05-17 | キヤノン株式会社 | 光ヘツド装置 |
| JP2634797B2 (ja) * | 1986-01-24 | 1997-07-30 | 日本電気株式会社 | 光ヘッド装置 |
| JPH0750532B2 (ja) * | 1986-05-26 | 1995-05-31 | 日本電気株式会社 | 光ヘツド装置 |
| JPH0743845B2 (ja) * | 1985-12-16 | 1995-05-15 | キヤノン株式会社 | 光ヘツド装置 |
| CA1324516C (en) * | 1988-06-23 | 1993-11-23 | Toshiya Nagahama | Optical pickup apparatus |
| JP2863977B2 (ja) * | 1992-08-24 | 1999-03-03 | 三菱電機株式会社 | 光ディスク装置 |
| JP3660415B2 (ja) * | 1995-02-07 | 2005-06-15 | 富士通株式会社 | 光学記憶装置用光学デバイス |
-
1983
- 1983-06-13 JP JP10411983A patent/JPS59231736A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59231736A (ja) | 1984-12-26 |