JPH0480455B2 - - Google Patents
Info
- Publication number
- JPH0480455B2 JPH0480455B2 JP59057862A JP5786284A JPH0480455B2 JP H0480455 B2 JPH0480455 B2 JP H0480455B2 JP 59057862 A JP59057862 A JP 59057862A JP 5786284 A JP5786284 A JP 5786284A JP H0480455 B2 JPH0480455 B2 JP H0480455B2
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- light beam
- recording
- focus control
- signal
- 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 23
- 230000001678 irradiating effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000012790 confirmation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 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
- G11B7/09—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
- G11B7/095—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble
- G11B7/0953—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for eccentricity of the disc or disc tracks
-
- 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
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59057862A JPS59223960A (ja) | 1984-03-26 | 1984-03-26 | 光学式記録媒体 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59057862A JPS59223960A (ja) | 1984-03-26 | 1984-03-26 | 光学式記録媒体 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4487677A Division JPS53129604A (en) | 1977-04-18 | 1977-04-18 | Optical recorder-reproducer |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23605891A Division JPH0719379B2 (ja) | 1991-09-17 | 1991-09-17 | 焦点制御の制御位置調整方法 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59223960A JPS59223960A (ja) | 1984-12-15 |
| JPH0480455B2 true JPH0480455B2 (no) | 1992-12-18 |
Family
ID=13067802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59057862A Granted JPS59223960A (ja) | 1984-03-26 | 1984-03-26 | 光学式記録媒体 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59223960A (no) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5223309A (en) * | 1975-08-15 | 1977-02-22 | Sony Corp | Data recording medium manufacturing process |
| JPS5240151A (en) * | 1975-09-25 | 1977-03-28 | Matsushita Electric Ind Co Ltd | Method of detecting position for setting recording disc in an equipment for optical reproducing a record and recording plate therefore |
| JPS5369005A (en) * | 1976-12-01 | 1978-06-20 | Teac Co | Automatic focus controller |
| JPS53129604A (en) * | 1977-04-18 | 1978-11-11 | Matsushita Electric Ind Co Ltd | Optical recorder-reproducer |
| JPS5630612A (en) * | 1979-08-21 | 1981-03-27 | Toshiba Corp | Pressure transducer |
| JPS6114575A (ja) * | 1984-06-22 | 1986-01-22 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | 回路試験用探針装置 |
-
1984
- 1984-03-26 JP JP59057862A patent/JPS59223960A/ja active Granted
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5223309A (en) * | 1975-08-15 | 1977-02-22 | Sony Corp | Data recording medium manufacturing process |
| JPS5240151A (en) * | 1975-09-25 | 1977-03-28 | Matsushita Electric Ind Co Ltd | Method of detecting position for setting recording disc in an equipment for optical reproducing a record and recording plate therefore |
| JPS5369005A (en) * | 1976-12-01 | 1978-06-20 | Teac Co | Automatic focus controller |
| JPS53129604A (en) * | 1977-04-18 | 1978-11-11 | Matsushita Electric Ind Co Ltd | Optical recorder-reproducer |
| JPS5630612A (en) * | 1979-08-21 | 1981-03-27 | Toshiba Corp | Pressure transducer |
| JPS6114575A (ja) * | 1984-06-22 | 1986-01-22 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | 回路試験用探針装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59223960A (ja) | 1984-12-15 |
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