BE833744A - Dispositif d'asservissement sur le centre d'une piste discontinue contenant des informations - Google Patents
Dispositif d'asservissement sur le centre d'une piste discontinue contenant des informationsInfo
- Publication number
- BE833744A BE833744A BE160308A BE160308A BE833744A BE 833744 A BE833744 A BE 833744A BE 160308 A BE160308 A BE 160308A BE 160308 A BE160308 A BE 160308A BE 833744 A BE833744 A BE 833744A
- Authority
- BE
- Belgium
- Prior art keywords
- center
- control device
- containing information
- track containing
- discontinuous track
- 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
- G11B7/0901—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 track following only
- G11B7/0904—Dithered tracking systems
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US51016374A | 1974-09-30 | 1974-09-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
BE833744A true BE833744A (fr) | 1976-03-24 |
Family
ID=24029616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE160308A BE833744A (fr) | 1974-09-30 | 1975-09-24 | Dispositif d'asservissement sur le centre d'une piste discontinue contenant des informations |
Country Status (18)
Country | Link |
---|---|
US (1) | US4118735A (pt) |
JP (1) | JPS5713042B2 (pt) |
AR (1) | AR205839A1 (pt) |
AT (1) | AT347710B (pt) |
BE (1) | BE833744A (pt) |
BR (1) | BR7506287A (pt) |
CA (1) | CA1057397A (pt) |
CH (1) | CH597735A5 (pt) |
DE (1) | DE2541520C3 (pt) |
DK (1) | DK383875A (pt) |
ES (1) | ES441179A1 (pt) |
FR (1) | FR2286465A1 (pt) |
GB (1) | GB1483161A (pt) |
IT (1) | IT1047587B (pt) |
NL (1) | NL184933C (pt) |
NO (1) | NO753187L (pt) |
SE (1) | SE410771B (pt) |
ZA (1) | ZA755478B (pt) |
Families Citing this family (46)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5444202B2 (pt) * | 1974-10-18 | 1979-12-25 | ||
US4074085A (en) * | 1976-03-31 | 1978-02-14 | Eli S. Jacobs | Multiple beam optical record playback apparatus for simultaneous scan of plural data tracks |
JPS54102107A (en) * | 1978-01-30 | 1979-08-11 | Hitachi Ltd | Control information detecting method |
JPS54116902A (en) * | 1978-03-02 | 1979-09-11 | Nippon Columbia | Device for correcting focus |
SE7813460L (sv) * | 1978-03-27 | 1979-09-28 | Mca Disco Vision | Videoskivspelare |
US4370679A (en) * | 1978-03-27 | 1983-01-25 | Discovision Associates | Gain correction system for videodisc player apparatus |
US4371899A (en) * | 1978-03-27 | 1983-02-01 | Discovision Associates | Time base error correction system for player |
US4358796A (en) * | 1978-03-27 | 1982-11-09 | Discovision Associates | Spindle servo system for videodisc player |
US4232201A (en) * | 1978-11-24 | 1980-11-04 | Mca Discovision, Inc. | Dithered center tracking system |
US4271334A (en) * | 1979-04-06 | 1981-06-02 | Discovision Associates | Apparatus for correcting for temperature-induced tracking errors in a system for recovering information from a recording disc |
NL7904724A (nl) * | 1979-06-18 | 1980-12-22 | Philips Nv | Optische aftastinrichting met fokusseerstelsel. |
US4321622A (en) * | 1979-11-26 | 1982-03-23 | Mcdonnell Douglas Corporation | Video track transfer system and method |
JPS5720928A (en) * | 1980-07-09 | 1982-02-03 | Toshiba Corp | Optical disk reproduction system |
US4358774A (en) * | 1980-07-14 | 1982-11-09 | Discovision Associates | Apparatus and method for controlling focus in a recording system |
US4695991A (en) * | 1980-12-09 | 1987-09-22 | Storage Research Pty. Ltd. | Reading information stored in multiple frame format |
US4466087A (en) * | 1981-01-08 | 1984-08-14 | Xerox Corporation | Optical memory system for a reading/writing, verifying and tracking module |
JPS57120238A (en) * | 1981-01-16 | 1982-07-27 | Matsushita Electric Ind Co Ltd | Reproducing device |
JPS57181431A (en) * | 1981-04-10 | 1982-11-08 | Olympus Optical Co Ltd | Automatic tracking system for optical type disc |
FR2504765A1 (fr) * | 1981-04-27 | 1982-10-29 | Thomson Csf | Dispositif d'enregistrement-lecture comprenant un support mobile d'informations du type comportant une piste pregravee |
JPS57203228A (en) * | 1981-06-09 | 1982-12-13 | Sony Corp | Tracking adjuster |
US4459690A (en) * | 1981-07-30 | 1984-07-10 | Rca Corporation | Multi-beam optical record and playback apparatus having an improved beam splitter |
US4449212A (en) * | 1981-07-30 | 1984-05-15 | Rca Corporation | Multi-beam optical record and playback apparatus |
JPS5841447A (ja) * | 1981-09-04 | 1983-03-10 | Hitachi Ltd | 光スポット制御信号検出方法 |
NL8105346A (pt) * | 1981-11-26 | 1983-06-16 | ||
NL8105347A (nl) * | 1981-11-26 | 1983-06-16 | Philips Nv | Inrichting voor het optisch aftasten van een schijfvormige registratiedrager. |
US4462095A (en) * | 1982-03-19 | 1984-07-24 | Magnetic Peripherals Inc. | Moving diffraction grating for an information track centering system for optical recording |
JPH06101125B2 (ja) * | 1986-05-21 | 1994-12-12 | キヤノン株式会社 | 光学的情報記録再生装置 |
JP2681933B2 (ja) * | 1987-07-24 | 1997-11-26 | 松下電器産業株式会社 | 記録再生装置 |
US6141300A (en) * | 1989-06-20 | 2000-10-31 | Discovision Associates | Optical actuator including lens assembly with optical axis having symmetric suspensory forces acting thereon and optical disc system including same |
US5265079A (en) | 1991-02-15 | 1993-11-23 | Applied Magnetics Corporation | Seek actuator for optical recording |
US5808980A (en) * | 1991-02-15 | 1998-09-15 | Discovision Associates | Seek actuator for optical recording |
US6069857A (en) * | 1991-02-15 | 2000-05-30 | Discovision Associates | Optical disc system having improved circuitry for performing blank sector check on readable disc |
US5677899A (en) * | 1991-02-15 | 1997-10-14 | Discovision Associates | Method for moving carriage assembly from initial position to target position relative to storage medium |
US5729511A (en) | 1991-02-15 | 1998-03-17 | Discovision Associates | Optical disc system having servo motor and servo error detection assembly operated relative to monitored quad sum signal |
US6236625B1 (en) | 1991-02-15 | 2001-05-22 | Discovision Associates | Optical disc system having current monitoring circuit with controller for laser driver and method for operating same |
US5590102A (en) * | 1995-01-12 | 1996-12-31 | Discovision Associates | Recording informatioin on an optical disc without using pre-manufactured tracks |
US5748578A (en) * | 1995-01-25 | 1998-05-05 | Discovision Associates | Colpitts type oscillator having reduced ringing and improved optical disc system utilizing same |
US6434087B1 (en) | 1995-01-25 | 2002-08-13 | Discovision Associates | Optical disc system and method for controlling bias coil and light source to process information on a storage medium |
US6091684A (en) * | 1995-01-25 | 2000-07-18 | Discovision Associates | Optical disc system and method for changing the rotational rate of an information storage medium |
US5920539A (en) * | 1995-01-25 | 1999-07-06 | Discovision Associates | Apparatus and method for suppression of electromagnetic emissions having a groove on an external surface for passing an electrical conductor |
JP3581475B2 (ja) * | 1995-02-13 | 2004-10-27 | キヤノン株式会社 | 情報処理装置 |
US5978329A (en) * | 1995-06-07 | 1999-11-02 | Discovision Associates | Technique for closed loop servo operation in optical disc tracking control |
DE69612819T2 (de) * | 1995-12-06 | 2002-01-17 | Discovision Associates, Irvine | Gerät und Verfahren zum Regeln der Fokussierung |
US5689485A (en) * | 1996-04-01 | 1997-11-18 | Discovision Associates | Tracking control apparatus and method |
US5859830A (en) * | 1997-09-05 | 1999-01-12 | Eastman Kodak Company | Dynamic tracking control in an optical recording system by diffraction-based mark formation detection |
EP1771846B1 (en) * | 2004-07-15 | 2008-05-28 | Koninklijke Philips Electronics N.V. | Method and apparatus for scanning data stored on an optical storage medium |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2851521A (en) * | 1954-01-11 | 1958-09-09 | Philco Corp | Electrical system for keeping a scanning light beam centered on a line |
US3126535A (en) * | 1961-12-27 | 1964-03-24 | Transducer positioning system | |
US3624284A (en) * | 1966-09-01 | 1971-11-30 | Battelle Development Corp | Photographic record of digital information and playback system including optical scanner |
US3673412A (en) * | 1970-03-02 | 1972-06-27 | Trw Inc | Radiant energy beam scanning method and apparatus |
NL173343C (nl) * | 1972-03-29 | 1984-01-02 | Philips Nv | Inrichting voor het uitlezen van een schijfvormige registratiedrager met in optische vorm gecodeerde beeld-en/of geluidssignalen. |
US3829622A (en) * | 1972-10-24 | 1974-08-13 | Mca Disco Vision | Video disc player with variably biased pneumatic head |
US3914541A (en) * | 1972-12-11 | 1975-10-21 | Mca Disco Vision | Video disc player |
US3848095A (en) * | 1972-12-20 | 1974-11-12 | I O Metrics Corp | Three dimensional electro-optical retrieval system |
NL174591C (nl) * | 1973-02-09 | 1984-07-02 | Philips Nv | Schijfvormig registratiedragerlichaam. |
FR2251876B1 (pt) * | 1973-11-16 | 1977-09-23 | Thomson Brandt | |
US3985952A (en) * | 1974-02-04 | 1976-10-12 | Zenith Radio Corporation | Elasto-optic device for spot wobble in a video disc player |
-
1975
- 1975-01-01 AR AR260490A patent/AR205839A1/es active
- 1975-08-26 DK DK383875A patent/DK383875A/da unknown
- 1975-08-27 ZA ZA00755478A patent/ZA755478B/xx unknown
- 1975-09-03 CA CA234,659A patent/CA1057397A/en not_active Expired
- 1975-09-17 DE DE2541520A patent/DE2541520C3/de not_active Expired
- 1975-09-18 NO NO753187A patent/NO753187L/no unknown
- 1975-09-22 CH CH1226875A patent/CH597735A5/xx not_active IP Right Cessation
- 1975-09-23 ES ES441179A patent/ES441179A1/es not_active Expired
- 1975-09-24 FR FR7529270A patent/FR2286465A1/fr active Granted
- 1975-09-24 BE BE160308A patent/BE833744A/xx not_active IP Right Cessation
- 1975-09-25 NL NLAANVRAGE7511320,A patent/NL184933C/xx not_active IP Right Cessation
- 1975-09-25 SE SE7510783A patent/SE410771B/xx not_active IP Right Cessation
- 1975-09-26 IT IT51519/75A patent/IT1047587B/it active
- 1975-09-26 AT AT738575A patent/AT347710B/de not_active IP Right Cessation
- 1975-09-29 BR BR7506287*A patent/BR7506287A/pt unknown
- 1975-09-29 GB GB39771/75A patent/GB1483161A/en not_active Expired
- 1975-09-30 JP JP11821475A patent/JPS5713042B2/ja not_active Expired
-
1977
- 1977-02-09 US US05/766,928 patent/US4118735A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
SE410771B (sv) | 1979-10-29 |
SE7510783L (sv) | 1976-03-31 |
NL184933B (nl) | 1989-07-03 |
DE2541520C3 (de) | 1982-12-16 |
JPS5161803A (pt) | 1976-05-28 |
US4118735A (en) | 1978-10-03 |
CH597735A5 (pt) | 1978-04-14 |
DK383875A (da) | 1976-03-31 |
DE2541520B2 (de) | 1977-07-21 |
CA1057397A (en) | 1979-06-26 |
AU8434875A (en) | 1977-03-03 |
AR205839A1 (es) | 1976-06-07 |
NL7511320A (nl) | 1976-04-01 |
AT347710B (de) | 1979-01-10 |
BR7506287A (pt) | 1976-08-03 |
ES441179A1 (es) | 1977-04-01 |
FR2286465B1 (pt) | 1980-06-27 |
DE2541520A1 (de) | 1976-04-08 |
ZA755478B (en) | 1976-07-28 |
NO753187L (pt) | 1976-03-31 |
FR2286465A1 (fr) | 1976-04-23 |
JPS5713042B2 (pt) | 1982-03-15 |
NL184933C (nl) | 1989-12-01 |
IT1047587B (it) | 1980-10-20 |
GB1483161A (en) | 1977-08-17 |
ATA738575A (de) | 1978-05-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RE20 | Patent expired |
Owner name: DISCOVISION ASSOCIATES Effective date: 19950924 |