JPH0544736B2 - - Google Patents
Info
- Publication number
- JPH0544736B2 JPH0544736B2 JP58239747A JP23974783A JPH0544736B2 JP H0544736 B2 JPH0544736 B2 JP H0544736B2 JP 58239747 A JP58239747 A JP 58239747A JP 23974783 A JP23974783 A JP 23974783A JP H0544736 B2 JPH0544736 B2 JP H0544736B2
- Authority
- JP
- Japan
- Prior art keywords
- spots
- recording
- spot
- signal
- beam deflection
- 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
- 230000003287 optical effect Effects 0.000 claims description 22
- 238000001514 detection method Methods 0.000 claims 2
- 239000004065 semiconductor Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 150000004770 chalcogenides Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000382 optic material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
- G11B7/08547—Arrangements for positioning the light beam only without moving the head, e.g. using static electro-optical elements
-
- 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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0055—Erasing
-
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
- G11B20/1879—Direct read-after-write methods
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58239747A JPS60133550A (ja) | 1983-12-21 | 1983-12-21 | 光学的情報記録装置 |
| EP84115199A EP0146109B1 (en) | 1983-12-14 | 1984-12-12 | Optical information recording apparatus |
| DE8484115199T DE3482347D1 (de) | 1983-12-14 | 1984-12-12 | Geraet zum optischen aufzeichnen von informationen. |
| US06/681,690 US4622564A (en) | 1983-12-14 | 1984-12-14 | Optical information recording apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58239747A JPS60133550A (ja) | 1983-12-21 | 1983-12-21 | 光学的情報記録装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60133550A JPS60133550A (ja) | 1985-07-16 |
| JPH0544736B2 true JPH0544736B2 (en]) | 1993-07-07 |
Family
ID=17049324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58239747A Granted JPS60133550A (ja) | 1983-12-14 | 1983-12-21 | 光学的情報記録装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60133550A (en]) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0831216B2 (ja) * | 1989-11-14 | 1996-03-27 | 三菱電機株式会社 | 光記録再生装置 |
| US8848500B2 (en) | 2012-01-11 | 2014-09-30 | Panasonic Corporation | Optical read/write apparatus |
-
1983
- 1983-12-21 JP JP58239747A patent/JPS60133550A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60133550A (ja) | 1985-07-16 |
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