GB2105094B - Optical recording medium and information record and method of making same - Google Patents

Optical recording medium and information record and method of making same

Info

Publication number
GB2105094B
GB2105094B GB8223551A GB8223551A GB2105094B GB 2105094 B GB2105094 B GB 2105094B GB 8223551 A GB8223551 A GB 8223551A GB 8223551 A GB8223551 A GB 8223551A GB 2105094 B GB2105094 B GB 2105094B
Authority
GB
United Kingdom
Prior art keywords
recording medium
optical recording
information record
making same
making
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.)
Expired
Application number
GB8223551A
Other versions
GB2105094A (en
Inventor
Michael Ettenberg
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 GB2105094A publication Critical patent/GB2105094A/en
Application granted granted Critical
Publication of GB2105094B publication Critical patent/GB2105094B/en
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
GB8223551A 1981-08-17 1982-08-16 Optical recording medium and information record and method of making same Expired GB2105094B (en)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
GB2105094A GB2105094A (en) 1983-03-16
GB2105094B true GB2105094B (en) 1985-10-09

Family

ID=23127956

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8223551A Expired GB2105094B (en) 1981-08-17 1982-08-16 Optical recording medium and information record and method of making same

Country Status (5)

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

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 (en) * 1982-11-15 1984-05-24 Sony Corp Information recording medium
GB8309447D0 (en) * 1983-04-07 1983-05-11 Combined Tech Corp Plc Optical data storage
NL8301632A (en) * 1983-05-09 1984-12-03 Philips Nv REGISTRATION HOLDER IN WHICH INFORMATION CAN BE REGISTERED AND READ OUT BY OPTICAL ROAD.
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 (en) * 1988-12-27 1990-07-10 Sharp Corp Optical memory element
US5099469A (en) * 1990-02-20 1992-03-24 Del Mar Avionics Process for manufacturing an optical disc master

Family Cites Families (10)

* 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 (en) * 1976-09-24 1978-04-21 Thomson Brandt METHOD OF MANUFACTURING AN OPTICALLY RECORDABLE AND READABLE INFORMATION MEDIA AND MEDIA OBTAINED BY SUCH A PROCESS
US4216501A (en) * 1977-03-28 1980-08-05 Rca Corporation Optical anti-reflective information record
US4285056A (en) * 1979-10-17 1981-08-18 Rca Corporation Replicable optical recording medium
JPS56119947A (en) * 1980-02-23 1981-09-19 Sharp Corp Information recording disc
JPS56156144U (en) * 1980-04-21 1981-11-21
US4383311A (en) * 1980-10-21 1983-05-10 Rca Corporation Optical recording medium and information record with indented overcoat
JP2939562B2 (en) * 1990-05-24 1999-08-25 日本電信電話株式会社 Direction correction method for small diameter pipe burial and small diameter pipe burying device

Also Published As

Publication number Publication date
JPH0821178B2 (en) 1996-03-04
JPS5838193A (en) 1983-03-05
JPH0430095B2 (en) 1992-05-20
FR2531798B1 (en) 1987-04-30
FR2531798A1 (en) 1984-02-17
NL192279B (en) 1996-12-02
NL8203213A (en) 1983-03-16
GB2105094A (en) 1983-03-16
JPH0547040A (en) 1993-02-26
DE3229573A1 (en) 1983-02-24
NL192279C (en) 1997-04-03
DE3229573C2 (en) 1992-05-21

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 20020815