JPS6232528B2 - - Google Patents
Info
- Publication number
- JPS6232528B2 JPS6232528B2 JP19530881A JP19530881A JPS6232528B2 JP S6232528 B2 JPS6232528 B2 JP S6232528B2 JP 19530881 A JP19530881 A JP 19530881A JP 19530881 A JP19530881 A JP 19530881A JP S6232528 B2 JPS6232528 B2 JP S6232528B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- light
- photodetector
- recording medium
- optical
- 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
- 230000003287 optical effect Effects 0.000 claims description 89
- 239000002131 composite material Substances 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 201000009310 astigmatism Diseases 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 210000001747 pupil Anatomy 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19530881A JPS5897140A (ja) | 1981-12-04 | 1981-12-04 | 光学的情報信号再生装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19530881A JPS5897140A (ja) | 1981-12-04 | 1981-12-04 | 光学的情報信号再生装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5897140A JPS5897140A (ja) | 1983-06-09 |
| JPS6232528B2 true JPS6232528B2 (enrdf_load_stackoverflow) | 1987-07-15 |
Family
ID=16338991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19530881A Granted JPS5897140A (ja) | 1981-12-04 | 1981-12-04 | 光学的情報信号再生装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5897140A (enrdf_load_stackoverflow) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59147306A (ja) * | 1983-02-10 | 1984-08-23 | Sony Corp | フオ−カス誤差検出装置 |
| JPS59221835A (ja) * | 1983-05-31 | 1984-12-13 | Sony Corp | フオ−カス誤差検出装置 |
| JPH0198131A (ja) * | 1987-10-09 | 1989-04-17 | Sharp Corp | 光学型情報再生装置 |
| JPH023111A (ja) * | 1988-06-16 | 1990-01-08 | Victor Co Of Japan Ltd | 焦点エラー検出方法 |
| JP2886230B2 (ja) * | 1989-01-06 | 1999-04-26 | 株式会社東芝 | 光ヘッド及びこれを用いた焦点誤差検出装置 |
-
1981
- 1981-12-04 JP JP19530881A patent/JPS5897140A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5897140A (ja) | 1983-06-09 |
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