GB1565741A - Automatic focussing system - Google Patents
Automatic focussing system Download PDFInfo
- Publication number
- GB1565741A GB1565741A GB1285/77A GB128577A GB1565741A GB 1565741 A GB1565741 A GB 1565741A GB 1285/77 A GB1285/77 A GB 1285/77A GB 128577 A GB128577 A GB 128577A GB 1565741 A GB1565741 A GB 1565741A
- Authority
- GB
- United Kingdom
- Prior art keywords
- focussing
- objective
- plane
- optical
- oscillation
- 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
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
Landscapes
- Optical Recording Or Reproduction (AREA)
- Automatic Focus Adjustment (AREA)
- Focusing (AREA)
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 |
|---|---|
| GB1565741A true GB1565741A (en) | 1980-04-23 |
Family
ID=19825458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1285/77A Expired GB1565741A (en) | 1976-01-16 | 1977-01-13 | Automatic focussing system |
Country Status (20)
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2132381A (en) * | 1982-12-23 | 1984-07-04 | Konishiroku Photo Ind | Camera |
Families Citing this family (25)
| 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 |
| FR2425782B1 (fr) * | 1978-05-10 | 1988-02-12 | Olympus Optical Co | Appareil de lecture d'informations optiques |
| US4302830A (en) * | 1978-05-10 | 1981-11-24 | Olympus Optical Company Ltd. | Optical information reading-out apparatus |
| 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 |
| 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 |
| JPS6093122U (ja) * | 1983-11-30 | 1985-06-25 | ソニー株式会社 | 光学ピツクアツプ |
| JPS6093123U (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 (US20100154141A1-20100624-C00001.png) * | 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 CH CH41177A patent/CH610432A5/xx not_active IP Right Cessation
- 1977-01-13 NZ NZ183066A patent/NZ183066A/xx unknown
- 1977-01-13 AT AT16177A patent/AT351817B/de not_active IP Right Cessation
- 1977-01-13 IT IT19268/77A patent/IT1076518B/it active
- 1977-01-13 DK DK12777A patent/DK12777A/da unknown
- 1977-01-13 JP JP197477A patent/JPS5288306A/ja active Pending
- 1977-01-13 AU AU21290/77A patent/AU507647B2/en not_active Expired
- 1977-01-13 DD DD7700196923A patent/DD129588A5/xx unknown
- 1977-01-13 GB GB1285/77A patent/GB1565741A/en not_active Expired
- 1977-01-13 SE SE7700274A patent/SE7700274L/xx unknown
- 1977-01-13 BR BR7700212A patent/BR7700212A/pt unknown
- 1977-01-14 ES ES455011A patent/ES455011A1/es not_active Expired
- 1977-01-14 BE BE174111A patent/BE850414A/xx unknown
- 1977-01-14 FR FR7700988A patent/FR2338543A1/fr active Granted
-
1985
- 1985-04-22 JP JP1985059550U patent/JPS60183920U/ja active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2132381A (en) * | 1982-12-23 | 1984-07-04 | Konishiroku Photo Ind | Camera |
Also Published As
| Publication number | Publication date |
|---|---|
| CH610432A5 (US20100154141A1-20100624-C00001.png) | 1979-04-12 |
| AU2129077A (en) | 1978-07-20 |
| JPS60183920U (ja) | 1985-12-06 |
| AR211717A1 (es) | 1978-02-28 |
| AU507647B2 (en) | 1980-02-21 |
| IT1076518B (it) | 1985-04-27 |
| AT351817B (de) | 1979-08-10 |
| DE2700136C2 (de) | 1983-11-17 |
| FR2338543B1 (US20100154141A1-20100624-C00001.png) | 1980-03-21 |
| JPH0233294Y2 (US20100154141A1-20100624-C00001.png) | 1990-09-07 |
| ES455011A1 (es) | 1977-12-16 |
| SE7700274L (sv) | 1977-07-17 |
| NZ183066A (en) | 1980-02-21 |
| DD129588A5 (de) | 1978-01-25 |
| CA1081511A (en) | 1980-07-15 |
| DK12777A (da) | 1977-07-17 |
| BR7700212A (pt) | 1977-09-20 |
| ZA767246B (en) | 1978-07-26 |
| NL178915B (nl) | 1986-01-02 |
| DE2700136A1 (de) | 1977-07-21 |
| JPS5288306A (en) | 1977-07-23 |
| US4032776A (en) | 1977-06-28 |
| BE850414A (fr) | 1977-07-14 |
| NL7600423A (nl) | 1977-07-19 |
| NL178915C (nl) | 1986-06-02 |
| ATA16177A (de) | 1979-01-15 |
| FR2338543A1 (fr) | 1977-08-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |