FR2404277A1 - Systeme d'asservissement - Google Patents

Systeme d'asservissement

Info

Publication number
FR2404277A1
FR2404277A1 FR7827086A FR7827086A FR2404277A1 FR 2404277 A1 FR2404277 A1 FR 2404277A1 FR 7827086 A FR7827086 A FR 7827086A FR 7827086 A FR7827086 A FR 7827086A FR 2404277 A1 FR2404277 A1 FR 2404277A1
Authority
FR
France
Prior art keywords
pulses
modifying
disc
pulse train
slave system
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.)
Pending
Application number
FR7827086A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RCA Corp
Original Assignee
RCA Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by RCA Corp filed Critical RCA Corp
Publication of FR2404277A1 publication Critical patent/FR2404277A1/fr
Pending legal-status Critical Current

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
    • G11B7/0901—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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/7605—Television signal recording on discs or drums

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

Abstract

L'invention concerne une boucle d'asservissement prévue dans un dispositif optique d'enregistrement/restitution pour contrôler un ensemble moteur produisant un mouvement relatif en direction radiale, par rapport à un disque, entre le disque et un faisceau de lumière focalisée. Selon l'invention, on prévoit un moyen produisant un train d'impulsions de sortie, un premier moyen 59 pour modifier le nombre dimpulsions, un second moyen 61 pour modifier le nombre d'impulsions, et un moyen 101 pour empêcher les moyens 59 et 61 d'affecter le train d'impulsions en présence d'une détection de position centrée du spot de balayage ou d'un fonctionnement du système en mode d'enregistrement. L'invention s'applique notamment aux vidéodisques.
FR7827086A 1977-09-22 1978-09-21 Systeme d'asservissement Pending FR2404277A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/835,589 US4160270A (en) 1977-09-22 1977-09-22 Tracking servo system for video disc player/recorder

Publications (1)

Publication Number Publication Date
FR2404277A1 true FR2404277A1 (fr) 1979-04-20

Family

ID=25269900

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7827086A Pending FR2404277A1 (fr) 1977-09-22 1978-09-21 Systeme d'asservissement

Country Status (5)

Country Link
US (1) US4160270A (fr)
JP (1) JPS5458005A (fr)
DE (1) DE2841096A1 (fr)
FR (1) FR2404277A1 (fr)
NL (1) NL7809627A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2413749A1 (fr) * 1977-12-28 1979-07-27 Victor Company Of Japan Dispositif d'alimentation d'un transducteur de reproduction dans un appareil de reproduction sur support d'enregistrement tournant
EP0080212A1 (fr) * 1981-11-25 1983-06-01 Hitachi, Ltd. Appareil de mémoire optique

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6040093B2 (ja) * 1978-09-09 1985-09-09 パイオニアビデオ株式会社 トラッキングサ−ボ引込装置
US4310910A (en) * 1978-09-19 1982-01-12 Rca Corporation Optimal polarization for the optical readout of high density video recording
US4234837A (en) * 1979-01-12 1980-11-18 Mca Discovision, Inc. Digital center tracking system
US4236105A (en) * 1979-01-12 1980-11-25 Mca Discovision, Inc. Digital center tracking system
JPS6030016B2 (ja) * 1979-09-25 1985-07-13 日本ビクター株式会社 円盤状記録媒体記録及び／又は再生装置のサ−ボ方式
JPS6331218Y2 (fr) * 1979-11-08 1988-08-22
US4445153A (en) * 1980-03-07 1984-04-24 Ricoh Company, Ltd. Method of correcting track misalignment of floppy disc and apparatus therefor
US4340949A (en) * 1980-07-31 1982-07-20 Rca Corporation Processor controlled video disc servo system
US4365324A (en) * 1980-11-19 1982-12-21 Rca Corporation Eccentricity control device
JPS57181482A (en) * 1981-05-01 1982-11-08 Toshiba Corp Disc device
US4443869A (en) * 1981-09-28 1984-04-17 Rca Corporation Track jump servo system for disc player
US4543621A (en) * 1982-06-10 1985-09-24 Datacopy Corporation Spiral track disk drive
US4516231A (en) * 1982-08-26 1985-05-07 Rca Corporation Optical disc system having momentum compensation
US4832456A (en) * 1986-03-04 1989-05-23 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal disc memory with circular grooves for auto-focusing of write-in beam
DE3704146A1 (de) * 1987-02-11 1988-09-29 Basf Ag Laseroptisches schreib- und leseverfahren
US4980882A (en) * 1987-04-06 1990-12-25 Storage Technology Corporation Partners Ii Optical disk for detesting and distinguishing servo tracks from data tracks
US5016992A (en) * 1989-03-16 1991-05-21 Forschungszentrum Julich Gmbh Method of and apparatus for the reading of magnetically stored information
DE4127840A1 (de) * 1991-08-22 1993-02-25 Thomson Brandt Gmbh Optische abtastvorrichtung

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3381086A (en) * 1962-08-16 1968-04-30 Minnesota Mining & Mfg Reproduction of television signals from photographic disc recordings
US3423524A (en) * 1965-01-05 1969-01-21 Minnesota Mining & Mfg Recording system
FR2204007A1 (fr) * 1972-10-24 1974-05-17 Mca Disco Vision
FR2204008A1 (fr) * 1972-10-24 1974-05-17 Mca Disco Vision
FR2312091A1 (fr) * 1975-05-21 1976-12-17 Philips Nv Systeme optique de memorisation sur disque a canaux multiples pour la mise en memoire d'informations numeriques
DE2630381A1 (de) * 1975-07-07 1977-01-27 Pioneer Electronic Corp Optischer leser
FR2321808A1 (fr) * 1975-08-21 1977-03-18 Philips Nv Dispositif pour la lecture d'un porteur d'information en forme de disque
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
NL7702994A (nl) * 1976-03-19 1977-09-21 Rca Corp Stelsel voor het opnemen en terugspelen, dat gebruikt wordt bij schijven, trommels of soort- gelijke draaiende oppervlakken.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3530258A (en) * 1968-06-28 1970-09-22 Mca Technology Inc Video signal transducer having servo controlled flexible fiber optic track centering
US3737877A (en) * 1970-09-24 1973-06-05 Energy Conversion Devices Inc Data storage system with coarse and fine directing means
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.
US3944727A (en) * 1972-10-24 1976-03-16 Mca Discovision, Inc. Video disc player with movable mirror for directing light beam onto reflective disc
US3908076A (en) * 1972-10-24 1975-09-23 Mca Disco Vision Extended play videodisc recording system
US3931460A (en) * 1974-02-04 1976-01-06 Zenith Radio Corporation Video disc with multiturn undulating storage track
US3983317A (en) * 1974-12-09 1976-09-28 Teletype Corporation Astigmatizer for laser recording and reproducing system
US4065786A (en) * 1975-09-30 1977-12-27 Rca Corporation Videodisc playback system

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3381086A (en) * 1962-08-16 1968-04-30 Minnesota Mining & Mfg Reproduction of television signals from photographic disc recordings
US3423524A (en) * 1965-01-05 1969-01-21 Minnesota Mining & Mfg Recording system
FR2204007A1 (fr) * 1972-10-24 1974-05-17 Mca Disco Vision
FR2204008A1 (fr) * 1972-10-24 1974-05-17 Mca Disco Vision
FR2312091A1 (fr) * 1975-05-21 1976-12-17 Philips Nv Systeme optique de memorisation sur disque a canaux multiples pour la mise en memoire d'informations numeriques
DE2630381A1 (de) * 1975-07-07 1977-01-27 Pioneer Electronic Corp Optischer leser
FR2321808A1 (fr) * 1975-08-21 1977-03-18 Philips Nv Dispositif pour la lecture d'un porteur d'information en forme de disque
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
NL7702994A (nl) * 1976-03-19 1977-09-21 Rca Corp Stelsel voor het opnemen en terugspelen, dat gebruikt wordt bij schijven, trommels of soort- gelijke draaiende oppervlakken.
FR2344918A1 (fr) * 1976-03-19 1977-10-14 Rca Corp Dispositif d'asservissement de piste pour appareil d'enregistrement et de reproduction de videodisque

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2413749A1 (fr) * 1977-12-28 1979-07-27 Victor Company Of Japan Dispositif d'alimentation d'un transducteur de reproduction dans un appareil de reproduction sur support d'enregistrement tournant
EP0080212A1 (fr) * 1981-11-25 1983-06-01 Hitachi, Ltd. Appareil de mémoire optique
EP0141396A3 (en) * 1981-11-25 1985-10-02 Hitachi, Ltd. Access device for positioning a light beam to a desired guide groove of an optical memory apparatus

Also Published As

Publication number Publication date
JPS5458005A (en) 1979-05-10
DE2841096A1 (de) 1979-04-05
US4160270A (en) 1979-07-03
NL7809627A (nl) 1979-03-26

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