JPS57150152A - Optical disc - Google Patents

Optical disc

Info

Publication number
JPS57150152A
JPS57150152A JP56036252A JP3625281A JPS57150152A JP S57150152 A JPS57150152 A JP S57150152A JP 56036252 A JP56036252 A JP 56036252A JP 3625281 A JP3625281 A JP 3625281A JP S57150152 A JPS57150152 A JP S57150152A
Authority
JP
Japan
Prior art keywords
protective layers
absorb
optical disc
colored protective
colored
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.)
Pending
Application number
JP56036252A
Other languages
Japanese (ja)
Inventor
Michiharu Abe
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP56036252A priority Critical patent/JPS57150152A/en
Publication of JPS57150152A publication Critical patent/JPS57150152A/en
Pending 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

Abstract

PURPOSE:To protect the eyes of user, by providing a colored protective layer which can absorb at least a part of visual light. CONSTITUTION:Colored protective layers 11 and 16 which can absorb at least a part of visual light are provided. According to the wavelength of a laser light source used for optical discs, the protective layers 11 and 16 are made transparent at only the vicinity of the corresponding wavelengths. The provision of the colored protective layers 11 and 16 eliminates unnecessary regular reflection from an Al reflecting surface.
JP56036252A 1981-03-13 1981-03-13 Optical disc Pending JPS57150152A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56036252A JPS57150152A (en) 1981-03-13 1981-03-13 Optical disc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56036252A JPS57150152A (en) 1981-03-13 1981-03-13 Optical disc

Publications (1)

Publication Number Publication Date
JPS57150152A true JPS57150152A (en) 1982-09-16

Family

ID=12464575

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56036252A Pending JPS57150152A (en) 1981-03-13 1981-03-13 Optical disc

Country Status (1)

Country Link
JP (1) JPS57150152A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58135041U (en) * 1982-03-08 1983-09-10 松下電器産業株式会社 optical recording and reproducing disk
JPS6099697A (en) * 1983-11-07 1985-06-03 Ricoh Co Ltd Optical recording medium
JPS60135293A (en) * 1983-12-26 1985-07-18 Hitachi Ltd Recording medium
US6475589B1 (en) 2001-12-17 2002-11-05 General Electric Company Colored optical discs and methods for making the same
US6475588B1 (en) 2001-08-07 2002-11-05 General Electric Company Colored digital versatile disks
US6991889B2 (en) 2001-03-14 2006-01-31 General Electric Company Limited play data storage media and method for limiting access to data thereon
US7087282B2 (en) 2003-07-15 2006-08-08 General Electric Company Limited play optical storage medium, method for making the same
US7202292B2 (en) 2003-07-15 2007-04-10 General Electric Company Colored polymeric resin composition with 1,8-diaminoanthraquinone derivative, article made therefrom, and method for making the same

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58135041U (en) * 1982-03-08 1983-09-10 松下電器産業株式会社 optical recording and reproducing disk
JPS6099697A (en) * 1983-11-07 1985-06-03 Ricoh Co Ltd Optical recording medium
JPH0472713B2 (en) * 1983-11-07 1992-11-18 Ricoh Kk
JPS60135293A (en) * 1983-12-26 1985-07-18 Hitachi Ltd Recording medium
JPH0558911B2 (en) * 1983-12-26 1993-08-27 Hitachi Ltd
US6991889B2 (en) 2001-03-14 2006-01-31 General Electric Company Limited play data storage media and method for limiting access to data thereon
US6475588B1 (en) 2001-08-07 2002-11-05 General Electric Company Colored digital versatile disks
US6623827B2 (en) 2001-08-07 2003-09-23 General Electric Company Colored digital versatile disks
US6475589B1 (en) 2001-12-17 2002-11-05 General Electric Company Colored optical discs and methods for making the same
US7087282B2 (en) 2003-07-15 2006-08-08 General Electric Company Limited play optical storage medium, method for making the same
US7202292B2 (en) 2003-07-15 2007-04-10 General Electric Company Colored polymeric resin composition with 1,8-diaminoanthraquinone derivative, article made therefrom, and method for making the same

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