IT1031407B - Procedimento ottico e mezzi di messa in opera - Google Patents
Procedimento ottico e mezzi di messa in operaInfo
- Publication number
- IT1031407B IT1031407B IT1988375A IT1988375A IT1031407B IT 1031407 B IT1031407 B IT 1031407B IT 1988375 A IT1988375 A IT 1988375A IT 1988375 A IT1988375 A IT 1988375A IT 1031407 B IT1031407 B IT 1031407B
- Authority
- IT
- Italy
- Prior art keywords
- implementation
- optical procedure
- procedure
- optical
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title 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
-
- 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
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US43968374A | 1974-02-04 | 1974-02-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT1031407B true IT1031407B (it) | 1979-04-30 |
Family
ID=23745720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT1988375A IT1031407B (it) | 1974-02-04 | 1975-02-03 | Procedimento ottico e mezzi di messa in opera |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE2504599C2 (it) |
| FR (1) | FR2260163B1 (it) |
| GB (1) | GB1503197A (it) |
| IT (1) | IT1031407B (it) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2326006A1 (fr) * | 1975-09-26 | 1977-04-22 | Thomson Brandt | Procede de commande de la mise en route et de l'arret de la lecture d'un support d'enregistrement, support d'enregistrement et appareil pour la mise en oeuvre de ce procede |
| NL174609C (nl) * | 1975-10-15 | 1984-07-02 | Philips Nv | Volgspiegelinrichting in een optische platenspeler. |
| FR2375690A1 (fr) * | 1976-12-23 | 1978-07-21 | Thomson Brandt | Dispositif de detection de l'erreur de suivi radial pour lecteurs et enregistreurs optiques |
| CA1147456A (en) * | 1978-03-23 | 1983-05-31 | Raymond F. Ravizza | Automatically compensated movable head servo circuit and method |
| JPS583297B2 (ja) * | 1978-06-09 | 1983-01-20 | 株式会社日立製作所 | 情報記録再生方法，その装置およびその記録媒体 |
| FR2509077A1 (fr) * | 1981-07-03 | 1983-01-07 | Thomson Csf | Dispositif resonnant a lame vibrante excitee par un transducteur piezoelectrique et son application au suivi radial d'une piste d'un support d'information optique |
| FR2511537B1 (fr) * | 1981-08-14 | 1986-09-05 | Thomson Csf | Dispositif optique de suivi de piste a echantillonnage |
| JP4796551B2 (ja) * | 2007-07-31 | 2011-10-19 | 太陽誘電株式会社 | 光情報再生システム |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3126535A (en) * | 1961-12-27 | 1964-03-24 | Transducer positioning system | |
| US3371154A (en) * | 1963-12-26 | 1968-02-27 | Minnesota Mining & Mfg | Audio-video disk recording system with crosstalk prevention |
| DE1613990A1 (de) * | 1968-03-01 | 1970-08-20 | Bosch Gmbh Robert | Einrichtung zur Spurfuehrung bei einem Lichtfleck-Abtastgeraet |
| US3661441A (en) * | 1969-11-21 | 1972-05-09 | Nippon Telegraph & Telephone | Arrangement for acousto-optical light deflection |
-
1975
- 1975-01-28 FR FR7502598A patent/FR2260163B1/fr not_active Expired
- 1975-02-03 IT IT1988375A patent/IT1031407B/it active
- 1975-02-03 GB GB461175A patent/GB1503197A/en not_active Expired
- 1975-02-04 DE DE19752504599 patent/DE2504599C2/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2504599C2 (de) | 1985-10-03 |
| FR2260163B1 (it) | 1979-08-03 |
| FR2260163A1 (it) | 1975-08-29 |
| GB1503197A (en) | 1978-03-08 |
| DE2504599A1 (de) | 1975-08-21 |
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