JPS6120058B2 - - Google Patents
Info
- Publication number
- JPS6120058B2 JPS6120058B2 JP53054367A JP5436778A JPS6120058B2 JP S6120058 B2 JPS6120058 B2 JP S6120058B2 JP 53054367 A JP53054367 A JP 53054367A JP 5436778 A JP5436778 A JP 5436778A JP S6120058 B2 JPS6120058 B2 JP S6120058B2
- Authority
- JP
- Japan
- Prior art keywords
- tracking
- objective lens
- focusing
- signal
- driving device
- 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
- 238000001514 detection method Methods 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 description 45
- 238000010586 diagram Methods 0.000 description 6
- 239000000696 magnetic material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 4
- 230000010365 information processing Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241000239290 Araneae Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 201000009310 astigmatism Diseases 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration 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
- G11B7/09—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
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0937—Piezoelectric actuators
-
- 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
Landscapes
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
- Mechanical Optical Scanning Systems (AREA)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5436778A JPS54146612A (en) | 1978-05-10 | 1978-05-10 | Optical information read device |
US06/035,334 US4302830A (en) | 1978-05-10 | 1979-05-01 | Optical information reading-out apparatus |
GB7915290A GB2025110B (en) | 1978-05-10 | 1979-05-02 | Optical information reading out apparatus |
FR7911773A FR2425782B1 (fr) | 1978-05-10 | 1979-05-09 | Appareil de lecture d'informations optiques |
DE2954579A DE2954579C2 (da) | 1978-05-10 | 1979-05-10 | |
DE19792918919 DE2918919A1 (de) | 1978-05-10 | 1979-05-10 | Vorrichtung zum auslesen optischer informationen aus einem aufzeichnungstraeger |
FR878706802A FR2598546B1 (fr) | 1978-05-10 | 1987-05-14 | Dispositif d'entrainement d'un objectif d'appareil de lecture d'informations optiques |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5436778A JPS54146612A (en) | 1978-05-10 | 1978-05-10 | Optical information read device |
Related Child Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15830884A Division JPS60121543A (ja) | 1984-07-28 | 1984-07-28 | 光学的情報読取装置 |
JP15830784A Division JPS60121542A (ja) | 1984-07-28 | 1984-07-28 | 対物レンズ支持装置 |
JP15830684A Division JPS60209937A (ja) | 1984-07-28 | 1984-07-28 | 光学的情報読取装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54146612A JPS54146612A (en) | 1979-11-16 |
JPS6120058B2 true JPS6120058B2 (da) | 1986-05-20 |
Family
ID=12968675
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5436778A Granted JPS54146612A (en) | 1978-05-10 | 1978-05-10 | Optical information read device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54146612A (da) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2060927B (en) * | 1979-07-24 | 1984-02-01 | Universal Pioneer Corp | Signal reading device for optical discs |
US4342935A (en) * | 1980-04-10 | 1982-08-03 | Discovision Associates | Binary piezoelectric drive for lens focusing system |
CA1132258A (en) * | 1980-05-12 | 1982-09-21 | Herman W. Willemsen | Scanning head for an optical disc system |
JPS56165938A (en) * | 1980-05-23 | 1981-12-19 | Sharp Corp | Optical scanner |
JPS5826331A (ja) * | 1981-08-11 | 1983-02-16 | Nippon Telegr & Teleph Corp <Ntt> | 光学ヘツド |
JPS5860438A (ja) * | 1981-10-05 | 1983-04-09 | Mitsubishi Electric Corp | 集光レンズ支持装置 |
JPS58222449A (ja) * | 1982-06-18 | 1983-12-24 | Matsushita Electric Ind Co Ltd | 光デイスク用アクチユエ−タ |
US4843600A (en) * | 1985-09-13 | 1989-06-27 | Canon Kabushiki Kaisha | Recording head for magneto-optical information recording apparatus |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS48101103A (da) * | 1972-02-29 | 1973-12-20 | ||
JPS5161725A (da) * | 1974-11-27 | 1976-05-28 | Nippon Musical Instruments Mfg | |
JPS51114940A (en) * | 1975-03-28 | 1976-10-09 | Geometric Data Corp | Fine focus adjustment device |
JPS5248912A (en) * | 1975-10-15 | 1977-04-19 | Philips Nv | Mirror device for tracing video disk reproducer |
-
1978
- 1978-05-10 JP JP5436778A patent/JPS54146612A/ja active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS48101103A (da) * | 1972-02-29 | 1973-12-20 | ||
JPS5161725A (da) * | 1974-11-27 | 1976-05-28 | Nippon Musical Instruments Mfg | |
JPS51114940A (en) * | 1975-03-28 | 1976-10-09 | Geometric Data Corp | Fine focus adjustment device |
JPS5248912A (en) * | 1975-10-15 | 1977-04-19 | Philips Nv | Mirror device for tracing video disk reproducer |
Also Published As
Publication number | Publication date |
---|---|
JPS54146612A (en) | 1979-11-16 |
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