JPH026138B2 - - Google Patents

Info

Publication number
JPH026138B2
JPH026138B2 JP55141720A JP14172080A JPH026138B2 JP H026138 B2 JPH026138 B2 JP H026138B2 JP 55141720 A JP55141720 A JP 55141720A JP 14172080 A JP14172080 A JP 14172080A JP H026138 B2 JPH026138 B2 JP H026138B2
Authority
JP
Japan
Prior art keywords
transparent flat
recording layer
flat plates
partition
optical disk
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 - Lifetime
Application number
JP55141720A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5766540A (en
Inventor
Hideo Ando
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.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric Co Ltd
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 Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Priority to JP55141720A priority Critical patent/JPS5766540A/ja
Priority to EP81107747A priority patent/EP0049813B1/en
Priority to DE8181107747T priority patent/DE3173458D1/de
Priority to US06/309,102 priority patent/US4432002A/en
Publication of JPS5766540A publication Critical patent/JPS5766540A/ja
Publication of JPH026138B2 publication Critical patent/JPH026138B2/ja
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
    • G11B7/24018—Laminated discs
    • G11B7/24021—Laminated discs provided with a special shape or structure for centering or eccentricity prevention, e.g. alignment

Landscapes

  • Manufacturing Optical Record Carriers (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
JP55141720A 1980-10-09 1980-10-09 Optical information storage carrier and its manufacture Granted JPS5766540A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP55141720A JPS5766540A (en) 1980-10-09 1980-10-09 Optical information storage carrier and its manufacture
EP81107747A EP0049813B1 (en) 1980-10-09 1981-09-29 Data recording medium and manufacturing method therefor
DE8181107747T DE3173458D1 (en) 1980-10-09 1981-09-29 Data recording medium and manufacturing method therefor
US06/309,102 US4432002A (en) 1980-10-09 1981-10-06 Data recording medium and manufacturing method therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55141720A JPS5766540A (en) 1980-10-09 1980-10-09 Optical information storage carrier and its manufacture

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2320893A Division JPH0652589B2 (ja) 1990-11-27 1990-11-27 光学的情報記憶担体の製造方法

Publications (2)

Publication Number Publication Date
JPS5766540A JPS5766540A (en) 1982-04-22
JPH026138B2 true JPH026138B2 (en, 2012) 1990-02-07

Family

ID=15298626

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55141720A Granted JPS5766540A (en) 1980-10-09 1980-10-09 Optical information storage carrier and its manufacture

Country Status (4)

Country Link
US (1) US4432002A (en, 2012)
EP (1) EP0049813B1 (en, 2012)
JP (1) JPS5766540A (en, 2012)
DE (1) DE3173458D1 (en, 2012)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4423137A (en) * 1980-10-28 1983-12-27 Quixote Corporation Contact printing and etching method of making high density recording medium
JPS57169938A (en) * 1981-04-10 1982-10-19 Sony Corp Optical type recording medium
US5305301A (en) * 1981-04-10 1994-04-19 Sony Corporation Optically readable record carriers
NL8402193A (nl) * 1984-07-11 1986-02-03 Philips Nv Optisch registratie element.
DE3671998D1 (de) * 1985-02-18 1990-07-19 Hitachi Maxell Optische platte.
US5273598A (en) * 1985-02-18 1993-12-28 Hitachi Maxell, Ltd. Optical disc manufacturing method
JPH07107750B2 (ja) * 1986-02-21 1995-11-15 コニカ株式会社 情報記録媒体
JPS63167442A (ja) * 1986-12-29 1988-07-11 Mitsubishi Kasei Corp 光デイスク
JPS63188838A (ja) * 1987-01-31 1988-08-04 Toshiba Corp 情報記録媒体
US5392263A (en) 1990-01-31 1995-02-21 Sony Corporation Magneto-optical disk system with specified thickness for protective layer on the disk relative to the numerical aperture of the objective lens
JPH03256240A (ja) * 1990-03-06 1991-11-14 Ricoh Co Ltd 光情報記録媒体
USRE37185E1 (en) 1990-04-20 2001-05-22 Matsushita Electric Industrial Co., Ltd. Optical head
JP2616596B2 (ja) * 1990-04-20 1997-06-04 松下電器産業株式会社 光ディスク
US5146438A (en) * 1990-05-30 1992-09-08 E. I. Du Pont De Nemours & Co. Method of making double-sided magneto-optical disks having reduced birefringence
TW247960B (en, 2012) * 1992-11-16 1995-05-21 Canon Kk

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3665483A (en) * 1969-06-06 1972-05-23 Chase Manhattan Capital Corp Laser recording medium
US4179532A (en) * 1976-04-09 1979-12-18 Polygram Gmbh Process for producing a disc-shaped information carrier which has information in the form of a beam-reflecting structure
DE2653831C2 (de) * 1976-11-26 1982-09-09 Polygram Gmbh, 2000 Hamburg Plattenförmiger Informationsträger
DE2744533A1 (de) * 1977-10-04 1979-04-12 Polygram Gmbh Plattenfoermiger traeger zur optischen aufzeichnung und wiedergabe von signalen
JPS5496002A (en) * 1978-01-13 1979-07-30 Hitachi Ltd Information recording plate
US4264911A (en) * 1979-08-20 1981-04-28 Mca Discovision, Inc. Optical recording disc and related method of manufacture

Also Published As

Publication number Publication date
US4432002A (en) 1984-02-14
JPS5766540A (en) 1982-04-22
EP0049813B1 (en) 1986-01-08
EP0049813A1 (en) 1982-04-21
DE3173458D1 (en) 1986-02-20

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