BR7700212A - Sistema automatico de focalizacao otica - Google Patents
Sistema automatico de focalizacao oticaInfo
- Publication number
- BR7700212A BR7700212A BR7700212A BR7700212A BR7700212A BR 7700212 A BR7700212 A BR 7700212A BR 7700212 A BR7700212 A BR 7700212A BR 7700212 A BR7700212 A BR 7700212A BR 7700212 A BR7700212 A BR 7700212A
- Authority
- BR
- Brazil
- Prior art keywords
- focusing system
- automatic optical
- optical focusing
- automatic
- optical
- 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
- 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
- G11B7/09—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
- G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NLAANVRAGE7600423,A NL178915C (nl) | 1976-01-16 | 1976-01-16 | Automatisch optisch focusseersysteem. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BR7700212A true BR7700212A (pt) | 1977-09-20 |
Family
ID=19825458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BR7700212A BR7700212A (pt) | 1976-01-16 | 1977-01-13 | Sistema automatico de focalizacao otica |
Country Status (20)
| Country | Link |
|---|---|
| US (1) | US4032776A (pt) |
| JP (2) | JPS5288306A (pt) |
| AR (1) | AR211717A1 (pt) |
| AT (1) | AT351817B (pt) |
| AU (1) | AU507647B2 (pt) |
| BE (1) | BE850414A (pt) |
| BR (1) | BR7700212A (pt) |
| CA (1) | CA1081511A (pt) |
| CH (1) | CH610432A5 (pt) |
| DD (1) | DD129588A5 (pt) |
| DE (1) | DE2700136C2 (pt) |
| DK (1) | DK12777A (pt) |
| ES (1) | ES455011A1 (pt) |
| FR (1) | FR2338543A1 (pt) |
| GB (1) | GB1565741A (pt) |
| IT (1) | IT1076518B (pt) |
| NL (1) | NL178915C (pt) |
| NZ (1) | NZ183066A (pt) |
| SE (1) | SE7700274L (pt) |
| ZA (1) | ZA767246B (pt) |
Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL176315C (nl) * | 1976-05-12 | 1985-03-18 | Philips Nv | Optische aftastinrichting. |
| NL7703232A (nl) * | 1977-03-25 | 1978-09-27 | Philips Nv | Optische aftastinrichting. |
| NL7713711A (nl) * | 1977-12-12 | 1979-06-14 | Philips Nv | Optisch uitleeseenheid voor het uitlezen van een bewegende informatiedrager, in het bijzonder voor het uitlezen van een videoplaat. |
| JPS54102107A (en) * | 1978-01-30 | 1979-08-11 | Hitachi Ltd | Control information detecting method |
| US4302830A (en) * | 1978-05-10 | 1981-11-24 | Olympus Optical Company Ltd. | Optical information reading-out apparatus |
| FR2425782B1 (fr) * | 1978-05-10 | 1988-02-12 | Olympus Optical Co | Appareil de lecture d'informations optiques |
| US4241423A (en) * | 1978-12-22 | 1980-12-23 | Rca Corporation | Optical memory with injection laser as light source and detector |
| US4445209A (en) * | 1979-08-27 | 1984-04-24 | Discovision Associates | Dithered focusing systems |
| NL8004380A (nl) * | 1980-07-31 | 1982-03-01 | Philips Nv | Optische inrichting voor het met een stralingsbundel inschrijven en/of uitlezen van registratiesporen. |
| JPS57176543A (en) * | 1981-04-20 | 1982-10-29 | Sony Corp | Optical type track scanner |
| NL8202451A (nl) * | 1982-06-17 | 1984-01-16 | Philips Nv | Optische inrichting. |
| US4499569A (en) * | 1982-09-07 | 1985-02-12 | Discovision Associates | Writing beam focus monitor |
| JPS5971141A (ja) * | 1982-10-14 | 1984-04-21 | Mitsubishi Electric Corp | 光学的信号読出し装置 |
| US4598989A (en) * | 1982-12-23 | 1986-07-08 | Konishiroku Photo Industry Co. Ltd. | Camera |
| JPS6020023U (ja) * | 1983-07-15 | 1985-02-12 | アルプス電気株式会社 | 光学式ピツクアツプにおける支持装置 |
| JPS6026621U (ja) * | 1983-07-28 | 1985-02-22 | アルプス電気株式会社 | 光学式ヘツド位置制御装置 |
| JPS6093123U (ja) * | 1983-11-30 | 1985-06-25 | ソニー株式会社 | 光学ピツクアツプ |
| JPS6093122U (ja) * | 1983-11-30 | 1985-06-25 | ソニー株式会社 | 光学ピツクアツプ |
| US4607157A (en) * | 1984-02-09 | 1986-08-19 | Xerox Corporation | Automatic focus offset correction system |
| JP2507315Y2 (ja) * | 1985-12-02 | 1996-08-14 | エヌティエヌ 株式会社 | 光学式デイスクプレ−ヤのレンズホルダ |
| US4956833A (en) * | 1986-03-31 | 1990-09-11 | Asahi Kogaku Kogyo Kabushiki Kaisha | Objective driving device for an optical disk apparatus |
| US4972397A (en) * | 1988-12-02 | 1990-11-20 | Drexler Technology Corporation | Dithering optical data logger |
| JPH03100935A (ja) * | 1989-09-12 | 1991-04-25 | Hitachi Ltd | 光ピツクアツプの防塵装置 |
| US5311489A (en) * | 1989-10-13 | 1994-05-10 | Canon Kabushiki Kaisha | Optical head for recording, reproducing, or erasing information having fixed and movable head units |
| US5138497A (en) * | 1991-03-15 | 1992-08-11 | Eastman Kodak Company | High speed focusing lens assembly |
| US5416756A (en) * | 1991-11-07 | 1995-05-16 | Mitsubishi Denki Kabushiki Kaisha | Lens actuating system with improved frequency response for optical disk drive |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3020414A (en) * | 1960-07-05 | 1962-02-06 | William B Mcknight | Scanning mirror assembly |
| US3418478A (en) * | 1966-08-29 | 1968-12-24 | Barnes Eng Co | Horizon sensor using two stationary fields of view separated by a fixed elevation angle which are alternately sampled |
| US3642344A (en) * | 1970-11-27 | 1972-02-15 | Honeywell Inc | Optical scanner having high-frequency torsional oscillator |
| US3967110A (en) * | 1973-09-21 | 1976-06-29 | Corning Glass Works | Automatic focusing system |
| DE2453364C3 (de) * | 1973-11-09 | 1979-02-22 | Hitachi, Ltd., Tokio | Automatische Fokussiervorrichtung |
| FR2251876B1 (pt) * | 1973-11-16 | 1977-09-23 | Thomson Brandt | |
| US3932700A (en) * | 1974-02-04 | 1976-01-13 | Zenith Radio Corporation | Focus tracking registration for optical reproducing systems |
| US3946166A (en) * | 1974-04-01 | 1976-03-23 | Zenith Radio Corporation | Tracking arrangement |
| DE2458917C3 (de) * | 1974-12-12 | 1981-12-03 | Thomson-Brandt, 75008 Paris | Regelanordnung für die Fokussierung eines Leselichtbündels |
| NL174609C (nl) * | 1975-10-15 | 1984-07-02 | Philips Nv | Volgspiegelinrichting in een optische platenspeler. |
-
1976
- 1976-01-16 NL NLAANVRAGE7600423,A patent/NL178915C/xx not_active IP Right Cessation
- 1976-02-23 US US05/660,659 patent/US4032776A/en not_active Expired - Lifetime
- 1976-12-06 ZA ZA00767246A patent/ZA767246B/xx unknown
- 1976-12-15 AR AR265867A patent/AR211717A1/es active
-
1977
- 1977-01-04 DE DE2700136A patent/DE2700136C2/de not_active Expired
- 1977-01-12 CA CA269,546A patent/CA1081511A/en not_active Expired
- 1977-01-13 IT IT19268/77A patent/IT1076518B/it active
- 1977-01-13 AT AT16177A patent/AT351817B/de not_active IP Right Cessation
- 1977-01-13 DD DD7700196923A patent/DD129588A5/xx unknown
- 1977-01-13 AU AU21290/77A patent/AU507647B2/en not_active Expired
- 1977-01-13 DK DK12777A patent/DK12777A/da unknown
- 1977-01-13 SE SE7700274A patent/SE7700274L/xx unknown
- 1977-01-13 BR BR7700212A patent/BR7700212A/pt unknown
- 1977-01-13 NZ NZ183066A patent/NZ183066A/xx unknown
- 1977-01-13 JP JP197477A patent/JPS5288306A/ja active Pending
- 1977-01-13 GB GB1285/77A patent/GB1565741A/en not_active Expired
- 1977-01-13 CH CH41177A patent/CH610432A5/xx not_active IP Right Cessation
- 1977-01-14 BE BE174111A patent/BE850414A/xx unknown
- 1977-01-14 FR FR7700988A patent/FR2338543A1/fr active Granted
- 1977-01-14 ES ES455011A patent/ES455011A1/es not_active Expired
-
1985
- 1985-04-22 JP JP1985059550U patent/JPS60183920U/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| NL178915B (nl) | 1986-01-02 |
| AU2129077A (en) | 1978-07-20 |
| US4032776A (en) | 1977-06-28 |
| NL7600423A (nl) | 1977-07-19 |
| DE2700136C2 (de) | 1983-11-17 |
| ES455011A1 (es) | 1977-12-16 |
| BE850414A (fr) | 1977-07-14 |
| SE7700274L (sv) | 1977-07-17 |
| IT1076518B (it) | 1985-04-27 |
| CA1081511A (en) | 1980-07-15 |
| NZ183066A (en) | 1980-02-21 |
| NL178915C (nl) | 1986-06-02 |
| DE2700136A1 (de) | 1977-07-21 |
| AT351817B (de) | 1979-08-10 |
| ZA767246B (en) | 1978-07-26 |
| CH610432A5 (pt) | 1979-04-12 |
| FR2338543B1 (pt) | 1980-03-21 |
| JPS60183920U (ja) | 1985-12-06 |
| JPH0233294Y2 (pt) | 1990-09-07 |
| FR2338543A1 (fr) | 1977-08-12 |
| DK12777A (da) | 1977-07-17 |
| AU507647B2 (en) | 1980-02-21 |
| DD129588A5 (de) | 1978-01-25 |
| ATA16177A (de) | 1979-01-15 |
| GB1565741A (en) | 1980-04-23 |
| AR211717A1 (es) | 1978-02-28 |
| JPS5288306A (en) | 1977-07-23 |
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