FR2385535A1 - Perfectionnement a un support d'information - Google Patents

Perfectionnement a un support d'information

Info

Publication number
FR2385535A1
FR2385535A1 FR7739337A FR7739337A FR2385535A1 FR 2385535 A1 FR2385535 A1 FR 2385535A1 FR 7739337 A FR7739337 A FR 7739337A FR 7739337 A FR7739337 A FR 7739337A FR 2385535 A1 FR2385535 A1 FR 2385535A1
Authority
FR
France
Prior art keywords
layer
holes
light
thickness
regions
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.)
Granted
Application number
FR7739337A
Other languages
English (en)
Other versions
FR2385535B1 (fr
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 FR2385535A1 publication Critical patent/FR2385535A1/fr
Application granted granted Critical
Publication of FR2385535B1 publication Critical patent/FR2385535B1/fr
Granted 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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Holo Graphy (AREA)

Abstract

L'invention concerne un support d'information à utiliser dans un dispositif de restitution employant un faisceau de lumière à une fréquence donnée. Selon l'invention, un substrat 13 a une surface 15 réfléchissant la lumière, recouverte d'une couche d'un matériau 17 transparent à la lumière, recouverte elle-même d'une couche 19 d'un matériau absorbant la lumière, où est formée une piste d'information; la piste d'information se compose d'une succession de trous espacés P1 , P2 , P3 , P4 , des variations de l'espace entre des bords de trous successifs représentant l'information enregistrée; l'épaisseur de la couche 19 dans toutes ses régions autres que celles occupées par les trous est en rapport avec l'épaisseur de la couche 17 pour établir une condition d'anti-réflexion pour toutes les régions de la couche 19 autres que celles occupées par les trous; l'épaisseur de la couche 19 dans les régions occupées par les trous est inférieure à celle requise pour etablir une condition d'anti-réflexion. L'invention s'applique notamment à l'enregistrement et à la restitution des signaux vidéo.
FR7739337A 1977-03-28 1977-12-27 Perfectionnement a un support d'information Granted FR2385535A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78203277A 1977-03-28 1977-03-28

Publications (2)

Publication Number Publication Date
FR2385535A1 true FR2385535A1 (fr) 1978-10-27
FR2385535B1 FR2385535B1 (fr) 1984-05-04

Family

ID=25124733

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7739337A Granted FR2385535A1 (fr) 1977-03-28 1977-12-27 Perfectionnement a un support d'information

Country Status (9)

Country Link
JP (2) JPS53120506A (fr)
AU (1) AU514899B2 (fr)
DE (1) DE2757737A1 (fr)
FR (1) FR2385535A1 (fr)
GB (1) GB1590296A (fr)
HK (1) HK49783A (fr)
IT (1) IT1088701B (fr)
MY (1) MY8400273A (fr)
NL (1) NL191658C (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2402275A1 (fr) * 1977-08-29 1979-03-30 Rca Corp Perfectionnements apportes aux disques video
FR2418513A1 (fr) * 1978-02-24 1979-09-21 Rca Corp Support de stockage et de restitution d'information par voie optique
EP0046104A1 (fr) * 1980-08-13 1982-02-17 Thomson-Csf Procédé thermo-optique d'inscription d'information, support d'information destiné à la mise en oeuvre de ce procédé et dispositif de lecture de ce support d'information

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56156941A (en) * 1980-05-06 1981-12-03 Nippon Telegr & Teleph Corp <Ntt> Optical recording medium
EP0045183B1 (fr) * 1980-07-25 1984-12-05 Asahi Kasei Kogyo Kabushiki Kaisha Matériau d'enregistrement
JPS5952442A (ja) * 1982-09-14 1984-03-27 Kokusai Denshin Denwa Co Ltd <Kdd> 光磁気記録媒体
JPS59210545A (ja) * 1984-04-20 1984-11-29 Hitachi Ltd 情報記録媒体
JPH0624272U (ja) * 1992-08-31 1994-03-29 東芝機器株式会社 可撓性チューブの開閉装置
JP4778300B2 (ja) 2004-12-15 2011-09-21 株式会社リコー 追記型光記録媒体
WO2006098506A1 (fr) * 2005-03-17 2006-09-21 Ricoh Company, Ltd. Support d'enregistrment optique

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3651281A (en) * 1969-06-06 1972-03-21 Carl H Becker Laser recording system using photomagnetically magnetizable storage medium
DE2048430A1 (en) * 1970-10-02 1972-04-06 Licentia Gmbh Etching information carrier - through masking coat partly removed by laser beam
US3665483A (en) * 1969-06-06 1972-05-23 Chase Manhattan Capital Corp Laser recording medium
DE2522928A1 (de) * 1974-05-25 1975-12-04 Canon Kk Aufzeichnungstraeger und -verfahren

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52155474A (en) * 1976-06-21 1977-12-23 Nippon Mining Co Magnetic force sorting device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3651281A (en) * 1969-06-06 1972-03-21 Carl H Becker Laser recording system using photomagnetically magnetizable storage medium
US3665483A (en) * 1969-06-06 1972-05-23 Chase Manhattan Capital Corp Laser recording medium
DE2048430A1 (en) * 1970-10-02 1972-04-06 Licentia Gmbh Etching information carrier - through masking coat partly removed by laser beam
DE2522928A1 (de) * 1974-05-25 1975-12-04 Canon Kk Aufzeichnungstraeger und -verfahren

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2402275A1 (fr) * 1977-08-29 1979-03-30 Rca Corp Perfectionnements apportes aux disques video
FR2418513A1 (fr) * 1978-02-24 1979-09-21 Rca Corp Support de stockage et de restitution d'information par voie optique
EP0046104A1 (fr) * 1980-08-13 1982-02-17 Thomson-Csf Procédé thermo-optique d'inscription d'information, support d'information destiné à la mise en oeuvre de ce procédé et dispositif de lecture de ce support d'information

Also Published As

Publication number Publication date
HK49783A (en) 1983-11-11
DE2757737C2 (fr) 1988-05-05
IT1088701B (it) 1985-06-10
JPS53120506A (en) 1978-10-21
DE2757737A1 (de) 1978-10-05
GB1590296A (en) 1981-05-28
NL191658B (nl) 1995-08-01
JPH0222453B2 (fr) 1990-05-18
JPS6259372B2 (fr) 1987-12-10
JPS6352347A (ja) 1988-03-05
NL7713230A (nl) 1978-10-02
AU3087677A (en) 1979-05-31
FR2385535B1 (fr) 1984-05-04
AU514899B2 (en) 1981-03-05
MY8400273A (en) 1984-12-31
NL191658C (nl) 1995-12-02

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