FR2531798A1 - - Google Patents

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Publication number
FR2531798A1
FR2531798A1 FR8214044A FR8214044A FR2531798A1 FR 2531798 A1 FR2531798 A1 FR 2531798A1 FR 8214044 A FR8214044 A FR 8214044A FR 8214044 A FR8214044 A FR 8214044A FR 2531798 A1 FR2531798 A1 FR 2531798A1
Authority
FR
France
Prior art keywords
layer
light
tracing
recording medium
region
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
FR8214044A
Other languages
English (en)
French (fr)
Other versions
FR2531798B1 (it
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 FR2531798A1 publication Critical patent/FR2531798A1/fr
Application granted granted Critical
Publication of FR2531798B1 publication Critical patent/FR2531798B1/fr
Expired 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
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24085—Pits
    • 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

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Read Only Memory (AREA)
  • Optical Recording Or Reproduction (AREA)
FR8214044A 1981-08-17 1982-08-12 Expired FR2531798B1 (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US29316981A 1981-08-17 1981-08-17

Publications (2)

Publication Number Publication Date
FR2531798A1 true FR2531798A1 (it) 1984-02-17
FR2531798B1 FR2531798B1 (it) 1987-04-30

Family

ID=23127956

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8214044A Expired FR2531798B1 (it) 1981-08-17 1982-08-12

Country Status (5)

Country Link
JP (2) JPS5838193A (it)
DE (1) DE3229573A1 (it)
FR (1) FR2531798B1 (it)
GB (1) GB2105094B (it)
NL (1) NL192279C (it)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4451915A (en) * 1982-04-15 1984-05-29 Burroughs Corporation Optical storage system employing a multi-layer optical medium
GB2121227A (en) * 1982-05-11 1983-12-14 Nigel Geoffrey Ley Optical memory recording disc
JPS5990248A (ja) * 1982-11-15 1984-05-24 Sony Corp 情報記録媒体
GB8309447D0 (en) * 1983-04-07 1983-05-11 Combined Tech Corp Plc Optical data storage
NL8301632A (nl) * 1983-05-09 1984-12-03 Philips Nv Registratiedrager waarin langs optische weg informatie kan worden ingeschreven en uitgelezen.
US4544443A (en) * 1983-05-13 1985-10-01 Shap Kabushiki Kaisha Method for manufacturing an optical memory element
US4673602A (en) * 1984-06-13 1987-06-16 Sumitomo Bakelite Company Limited Composite substrate plate for magnetic or optical disk and process for production thereof
JPH02177030A (ja) * 1988-12-27 1990-07-10 Sharp Corp 光メモリ素子
US5099469A (en) * 1990-02-20 1992-03-24 Del Mar Avionics Process for manufacturing an optical disc master

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4216501A (en) * 1977-03-28 1980-08-05 Rca Corporation Optical anti-reflective information record
JPS56119947A (en) * 1980-02-23 1981-09-19 Sharp Corp Information recording disc
GB2086638A (en) * 1980-10-21 1982-05-12 Rca Corp Optical recording medium and record

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4069487A (en) * 1974-12-26 1978-01-17 Canon Kabushiki Kaisha Recording member and process for recording
JPS5247740A (en) * 1975-10-14 1977-04-15 Canon Inc Reproducing process
JPS52138101A (en) * 1976-05-14 1977-11-18 Hitachi Ltd Formation of a concavo-convex image
FR2365854A1 (fr) * 1976-09-24 1978-04-21 Thomson Brandt Procede de fabrication d'un support d'information enregistrable et lisible optiquement et support obtenu par un tel procede
US4285056A (en) * 1979-10-17 1981-08-18 Rca Corporation Replicable optical recording medium
JPS56156144U (it) * 1980-04-21 1981-11-21
JP2939562B2 (ja) * 1990-05-24 1999-08-25 日本電信電話株式会社 小口径管埋設における方向修正方法およびその小口径管埋設装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4216501A (en) * 1977-03-28 1980-08-05 Rca Corporation Optical anti-reflective information record
JPS56119947A (en) * 1980-02-23 1981-09-19 Sharp Corp Information recording disc
GB2086638A (en) * 1980-10-21 1982-05-12 Rca Corp Optical recording medium and record

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan vol. 5, no. 196, 12 décembre 1981 & JP-A-56-119947 *

Also Published As

Publication number Publication date
GB2105094B (en) 1985-10-09
JPH0547040A (ja) 1993-02-26
JPH0821178B2 (ja) 1996-03-04
NL192279B (nl) 1996-12-02
NL192279C (nl) 1997-04-03
JPH0430095B2 (it) 1992-05-20
DE3229573A1 (de) 1983-02-24
NL8203213A (nl) 1983-03-16
FR2531798B1 (it) 1987-04-30
DE3229573C2 (it) 1992-05-21
GB2105094A (en) 1983-03-16
JPS5838193A (ja) 1983-03-05

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