JPS60191440A - 光学式情報装置 - Google Patents
光学式情報装置Info
- Publication number
- JPS60191440A JPS60191440A JP4743084A JP4743084A JPS60191440A JP S60191440 A JPS60191440 A JP S60191440A JP 4743084 A JP4743084 A JP 4743084A JP 4743084 A JP4743084 A JP 4743084A JP S60191440 A JPS60191440 A JP S60191440A
- Authority
- JP
- Japan
- Prior art keywords
- focus
- disk
- signal
- guide groove
- error 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims description 38
- 239000000463 material Substances 0.000 abstract description 18
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 210000001835 viscera Anatomy 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
- G11B7/0908—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 focusing only
-
- 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
- Automatic Focus Adjustment (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4743084A JPS60191440A (ja) | 1984-03-12 | 1984-03-12 | 光学式情報装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4743084A JPS60191440A (ja) | 1984-03-12 | 1984-03-12 | 光学式情報装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60191440A true JPS60191440A (ja) | 1985-09-28 |
| JPH0458657B2 JPH0458657B2 (enrdf_load_stackoverflow) | 1992-09-18 |
Family
ID=12774931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4743084A Granted JPS60191440A (ja) | 1984-03-12 | 1984-03-12 | 光学式情報装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60191440A (enrdf_load_stackoverflow) |
-
1984
- 1984-03-12 JP JP4743084A patent/JPS60191440A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0458657B2 (enrdf_load_stackoverflow) | 1992-09-18 |
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