JPH0311007B2 - - Google Patents
Info
- Publication number
- JPH0311007B2 JPH0311007B2 JP56172400A JP17240081A JPH0311007B2 JP H0311007 B2 JPH0311007 B2 JP H0311007B2 JP 56172400 A JP56172400 A JP 56172400A JP 17240081 A JP17240081 A JP 17240081A JP H0311007 B2 JPH0311007 B2 JP H0311007B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- output
- photodetectors
- detector
- disk
- 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 - Lifetime
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/13—Optical detectors therefor
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56172400A JPS5873024A (ja) | 1981-10-27 | 1981-10-27 | 光学式情報処理装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56172400A JPS5873024A (ja) | 1981-10-27 | 1981-10-27 | 光学式情報処理装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5873024A JPS5873024A (ja) | 1983-05-02 |
| JPH0311007B2 true JPH0311007B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1991-02-15 |
Family
ID=15941236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56172400A Granted JPS5873024A (ja) | 1981-10-27 | 1981-10-27 | 光学式情報処理装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5873024A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4742218A (en) * | 1985-03-11 | 1988-05-03 | Hitachi, Ltd. | Focus error detection apparatus utilizing focusing an front and rear sides of focal planes |
| JPH05210858A (ja) * | 1991-10-29 | 1993-08-20 | Internatl Business Mach Corp <Ibm> | サーボ・クロストークを減少させるための収差補償を備えた光学式データ記憶システム |
| JP2685015B2 (ja) * | 1995-03-17 | 1997-12-03 | 株式会社日立製作所 | 光ディスク装置 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53100203A (en) * | 1977-02-15 | 1978-09-01 | Mitsubishi Electric Corp | Optical reproducer |
| JPS53123103A (en) * | 1977-04-02 | 1978-10-27 | Mansei Kogyo Kk | Optical information reader |
-
1981
- 1981-10-27 JP JP56172400A patent/JPS5873024A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5873024A (ja) | 1983-05-02 |