JPS6310491B2 - - Google Patents
Info
- Publication number
- JPS6310491B2 JPS6310491B2 JP57180251A JP18025182A JPS6310491B2 JP S6310491 B2 JPS6310491 B2 JP S6310491B2 JP 57180251 A JP57180251 A JP 57180251A JP 18025182 A JP18025182 A JP 18025182A JP S6310491 B2 JPS6310491 B2 JP S6310491B2
- Authority
- JP
- Japan
- Prior art keywords
- beam splitter
- polarizing beam
- light
- optical head
- 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 61
- 239000004065 semiconductor Substances 0.000 claims description 7
- 230000010287 polarization Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000926 separation method Methods 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
- G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
-
- 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
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0901—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57180251A JPS5971139A (ja) | 1982-10-14 | 1982-10-14 | 光学ヘツド |
| EP83303435A EP0098076A1 (de) | 1982-06-14 | 1983-06-14 | Strahlzugriffsgerät für eine Vorrichtung mit optischen Scheiben |
| US06/765,172 US4615023A (en) | 1982-06-14 | 1985-08-12 | Beam access apparatus for optical disc system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57180251A JPS5971139A (ja) | 1982-10-14 | 1982-10-14 | 光学ヘツド |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5971139A JPS5971139A (ja) | 1984-04-21 |
| JPS6310491B2 true JPS6310491B2 (de) | 1988-03-07 |
Family
ID=16079998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57180251A Granted JPS5971139A (ja) | 1982-06-14 | 1982-10-14 | 光学ヘツド |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5971139A (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6220183A (ja) * | 1985-07-18 | 1987-01-28 | Toshiba Corp | トラツク飛び越し制御回路 |
-
1982
- 1982-10-14 JP JP57180251A patent/JPS5971139A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5971139A (ja) | 1984-04-21 |
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