FR2222665B1 - - Google Patents

Info

Publication number
FR2222665B1
FR2222665B1 FR7310142A FR7310142A FR2222665B1 FR 2222665 B1 FR2222665 B1 FR 2222665B1 FR 7310142 A FR7310142 A FR 7310142A FR 7310142 A FR7310142 A FR 7310142A FR 2222665 B1 FR2222665 B1 FR 2222665B1
Authority
FR
France
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
Application number
FR7310142A
Other languages
French (fr)
Other versions
FR2222665A1 (
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.)
Thomson-Brandt SA
Original Assignee
Thomson-Brandt SA
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 Thomson-Brandt SA filed Critical Thomson-Brandt SA
Priority to FR7310142A priority Critical patent/FR2222665B1/fr
Priority to US452443A priority patent/US3919698A/en
Priority to JP3015474A priority patent/JPS5632606B2/ja
Priority to CA195,493A priority patent/CA1014658A/en
Priority to DE2413423A priority patent/DE2413423C2/de
Priority to GB1269274A priority patent/GB1469962A/en
Priority to IT20505/74A priority patent/IT1019571B/it
Publication of FR2222665A1 publication Critical patent/FR2222665A1/fr
Application granted granted Critical
Publication of FR2222665B1 publication Critical patent/FR2222665B1/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Head (AREA)
  • Optical Elements Other Than Lenses (AREA)
FR7310142A 1973-03-21 1973-03-21 Expired FR2222665B1 ( )

Priority Applications (7)

Application Number Priority Date Filing Date Title
FR7310142A FR2222665B1 ( ) 1973-03-21 1973-03-21
US452443A US3919698A (en) 1973-03-21 1974-03-18 Method of reducing the optical noise produced by a motion on an illuminated surface, and optical devices for implementing said method
JP3015474A JPS5632606B2 ( ) 1973-03-21 1974-03-18
CA195,493A CA1014658A (en) 1973-03-21 1974-03-20 Method of reducing the optical noise produced by the motion of an illuminated surface, and optical devices for implementing said method
DE2413423A DE2413423C2 (de) 1973-03-21 1974-03-20 Verfahren zum Einschreiben in bzw. Auslesen aus einem beweglichen optischen Informationsträger und Vorrichtung zur Durchführung des Verfahrens
GB1269274A GB1469962A (en) 1973-03-21 1974-03-21 Method of reducing the optical noise produced by the motion of an illuminated surface and optical devices for implementing said method
IT20505/74A IT1019571B (it) 1973-03-21 1974-04-08 Dispositivo per la diminuzione del rumore ottico risultante dal movimento di una superficie illu minata

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7310142A FR2222665B1 ( ) 1973-03-21 1973-03-21

Publications (2)

Publication Number Publication Date
FR2222665A1 FR2222665A1 ( ) 1974-10-18
FR2222665B1 true FR2222665B1 ( ) 1975-10-31

Family

ID=9116637

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7310142A Expired FR2222665B1 ( ) 1973-03-21 1973-03-21

Country Status (7)

Country Link
US (1) US3919698A ( )
JP (1) JPS5632606B2 ( )
CA (1) CA1014658A ( )
DE (1) DE2413423C2 ( )
FR (1) FR2222665B1 ( )
GB (1) GB1469962A ( )
IT (1) IT1019571B ( )

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL181693C (nl) * 1974-11-29 1987-10-01 Philips Nv Inrichting voor het langs optische weg uitlezen van een stralingsreflekterende registratiedrager.
NL7506495A (nl) * 1975-06-02 1976-12-06 Philips Nv Inrichting voor het uitlezen van een registratie- drager.
FR2325951A1 (fr) * 1975-09-29 1977-04-22 Thomson Brandt Procede de diminution de bruit optique et dispositif mettant en oeuvre un tel procede
FR2330062A1 (fr) * 1975-10-31 1977-05-27 Thomson Brandt Dispositif de recherche de focalisation et lecteur optique comportant un tel dispositif
DE2634243A1 (de) * 1976-07-30 1978-02-02 Bosch Gmbh Robert System zur aufzeichnung und/oder wiedergabe von signalen mittels strahlen
US4105926A (en) * 1977-06-30 1978-08-08 Rca Corporation On-axis film scanner with reflected illumination
NL7809635A (nl) * 1978-09-22 1980-03-25 Philips Nv Inrichting voor het uitlezen van een optische registra- tiedrager bevattende een stralingsreflekterende infor- matiestruktuur.
NL8004159A (nl) * 1979-08-03 1981-01-22 Hitachi Ltd Optische opneeminrichting.
US4301374A (en) * 1979-11-16 1981-11-17 Fuji Photo Film Co., Ltd. Shutter system for optical multi-lens scanner
JPS5927974B2 (ja) * 1980-03-31 1984-07-10 工業技術院長 光情報処理装置
JPS57147148A (en) * 1981-03-05 1982-09-10 Olympus Optical Co Ltd Information reproducer with magnetooptic system
US4634880A (en) * 1982-04-19 1987-01-06 Siscan Systems, Inc. Confocal optical imaging system with improved signal-to-noise ratio
USRE32660E (en) * 1982-04-19 1988-05-03 Siscan Systems, Inc. Confocal optical imaging system with improved signal-to-noise ratio
US4570252A (en) * 1982-08-09 1986-02-11 Drexler Technology Corporation Optical data retrieval system using multi-spectral light sources
NL8603108A (nl) * 1986-12-08 1988-07-01 Philips Nv Mikroskoop.
FR2723243B1 (fr) * 1994-07-26 1996-09-06 Thomson Csf Dispositif d'enregistrement et/ou de lecture de tetes magnetiques et son procede de realisation
FR2739965B1 (fr) * 1995-10-17 1997-11-07 Thomson Csf Dispositif emetteur-recepteur de lumiere et systeme de lecture optique
FR2786345B1 (fr) 1998-11-24 2001-02-09 Thomson Csf Dispositif de cryptage quantique
FR2787232B1 (fr) 1998-12-15 2001-02-23 Thomson Csf Disque d'enregistrement optique anti-piratage et procede de lecture d'un tel disque
US7149173B2 (en) * 2000-10-17 2006-12-12 Thales Medium for recording optically readable data, method for making same and optical system reproducing said data
FR2824905B1 (fr) * 2001-05-15 2003-08-29 Thomson Csf Gyrometre a fibre optique
US9622918B2 (en) 2006-05-18 2017-04-18 Curt G. Joe, Inc. Methods and apparatus for application of nested zero waste ear to traveling web

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3396266A (en) * 1964-05-25 1968-08-06 Ibm Optical information read-out system
US3651281A (en) * 1969-06-06 1972-03-21 Carl H Becker Laser recording system using photomagnetically magnetizable storage medium
US3727195A (en) * 1970-07-20 1973-04-10 Orom Inc Method and system for read only memory
JPS5121354B1 ( ) * 1971-07-28 1976-07-01
US3720924A (en) * 1972-03-09 1973-03-13 Honeywell Inc Optical mass memory
NL7211676A ( ) * 1972-08-26 1974-02-28

Also Published As

Publication number Publication date
DE2413423C2 (de) 1983-09-01
JPS5048935A ( ) 1975-05-01
FR2222665A1 ( ) 1974-10-18
CA1014658A (en) 1977-07-26
JPS5632606B2 ( ) 1981-07-29
US3919698A (en) 1975-11-11
IT1019571B (it) 1977-11-30
DE2413423A1 (de) 1974-10-24
GB1469962A (en) 1977-04-14

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