IT1050331B - ELECTRODINAIMIC TRANSUCTOR - Google Patents
ELECTRODINAIMIC TRANSUCTORInfo
- Publication number
- IT1050331B IT1050331B IT3017975A IT3017975A IT1050331B IT 1050331 B IT1050331 B IT 1050331B IT 3017975 A IT3017975 A IT 3017975A IT 3017975 A IT3017975 A IT 3017975A IT 1050331 B IT1050331 B IT 1050331B
- Authority
- IT
- Italy
- Prior art keywords
- transuctor
- electrodinaimic
- electrodinaimic transuctor
- Prior art date
Links
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
-
- 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
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7441133A FR2294605A1 (en) | 1974-12-13 | 1974-12-13 | Electrodynamic transducer with movable system - designed for servo follower loop for optical reading of disc recordings (NL150676) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT1050331B true IT1050331B (en) | 1981-03-10 |
Family
ID=9146141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT3017975A IT1050331B (en) | 1974-12-13 | 1975-12-11 | ELECTRODINAIMIC TRANSUCTOR |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5187081A (en) |
| DE (1) | DE2556112A1 (en) |
| FR (1) | FR2294605A1 (en) |
| IT (1) | IT1050331B (en) |
| NL (1) | NL7514438A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2474740A1 (en) * | 1980-01-24 | 1981-07-31 | Thomson Csf | MOBILE CREW OF A VIDEODISK RECORDER PLAYER, AND VIDEO DEVICE RECORDER COMPRISING SUCH A CREW |
| NL8001617A (en) * | 1980-03-19 | 1981-10-16 | Philips Nv | DEVICE FOR ELECTRODYNAMICALLY CONTROLLED SWIVING OF AN OPTICAL ELEMENT. |
| FR2497378B1 (en) * | 1980-12-29 | 1985-06-28 | Thomson Csf | COMPENSATION DEVICE FOR IMBALANCE OF A RETURN MIRROR BELONGING TO AN OPTICAL ILLUMINATION SYSTEM OF AN INFORMATION MEDIUM |
| JPS57178233A (en) * | 1981-04-27 | 1982-11-02 | Sony Corp | Supporting structure of optical system |
| JPS58179635U (en) * | 1982-05-25 | 1983-12-01 | 株式会社三協精機製作所 | Pickup objective lens drive device |
| JPS59104735A (en) * | 1982-12-08 | 1984-06-16 | Sony Corp | Objective lens driver |
| DE3315848A1 (en) * | 1983-04-30 | 1984-10-31 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Actuator device on writing and reading units for constant correction of the spatial position of a writing or reading means, in particular a beam |
-
1974
- 1974-12-13 FR FR7441133A patent/FR2294605A1/en not_active Withdrawn
-
1975
- 1975-12-11 IT IT3017975A patent/IT1050331B/en active
- 1975-12-11 NL NL7514438A patent/NL7514438A/en unknown
- 1975-12-12 JP JP14831675A patent/JPS5187081A/en active Pending
- 1975-12-12 DE DE19752556112 patent/DE2556112A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5187081A (en) | 1976-07-30 |
| NL7514438A (en) | 1976-06-15 |
| FR2294605A1 (en) | 1976-07-09 |
| DE2556112A1 (en) | 1976-06-24 |
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