JPS6233649B2 - - Google Patents
Info
- Publication number
- JPS6233649B2 JPS6233649B2 JP19808281A JP19808281A JPS6233649B2 JP S6233649 B2 JPS6233649 B2 JP S6233649B2 JP 19808281 A JP19808281 A JP 19808281A JP 19808281 A JP19808281 A JP 19808281A JP S6233649 B2 JPS6233649 B2 JP S6233649B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- output
- track
- difference signal
- groove
- 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 51
- 238000007493 shaping process Methods 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- 239000000428 dust Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000005300 metallic glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000002834 transmittance 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
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19808281A JPS5898851A (ja) | 1981-12-08 | 1981-12-08 | トラツク検索装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19808281A JPS5898851A (ja) | 1981-12-08 | 1981-12-08 | トラツク検索装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5898851A JPS5898851A (ja) | 1983-06-11 |
| JPS6233649B2 true JPS6233649B2 (ko) | 1987-07-22 |
Family
ID=16385207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19808281A Granted JPS5898851A (ja) | 1981-12-08 | 1981-12-08 | トラツク検索装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5898851A (ko) |
-
1981
- 1981-12-08 JP JP19808281A patent/JPS5898851A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5898851A (ja) | 1983-06-11 |
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