JPS6322660U - - Google Patents

Info

Publication number
JPS6322660U
JPS6322660U JP1986113993U JP11399386U JPS6322660U JP S6322660 U JPS6322660 U JP S6322660U JP 1986113993 U JP1986113993 U JP 1986113993U JP 11399386 U JP11399386 U JP 11399386U JP S6322660 U JPS6322660 U JP S6322660U
Authority
JP
Japan
Prior art keywords
disc
base material
disc base
information recording
recording layer
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
JP1986113993U
Other languages
English (en)
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 filed Critical
Priority to JP1986113993U priority Critical patent/JPS6322660U/ja
Priority to US07/168,125 priority patent/US4877667A/en
Priority to DE8787903433T priority patent/DE3783353D1/de
Priority to EP87903433A priority patent/EP0277235B1/en
Priority to KR1019880700296A priority patent/KR910008504B1/ko
Priority to PCT/JP1987/000343 priority patent/WO1988000755A1/en
Priority to CN87105175A priority patent/CN1007187B/zh
Publication of JPS6322660U publication Critical patent/JPS6322660U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)

Description

【図面の簡単な説明】
第１図は、この考案の一実施例による光デイス
クの正面図、第２図は従来の光デイスクの正面図
である。図において、１はデイスク基材、１ａは
情報記録層、１ｂは中心穴、３は第１の円板、４
は第２の円板である。なお各図中同一符号は同一
又は相当部分を示す。

Claims (1)

    【実用新案登録請求の範囲】
  1. 径方向の所定の領域に情報記録層を有するデイ
    スク基材のほぼ中心部に所定の径の磁性体からな
    る第１の円板を配置されたものにおいて、上記デ
    イスク基材と上記円板との間に熱膨張係数が上記
    デイスク基材の熱膨張係数とほぼ同一な第２の円
    板を配置したことを特徴とする光デイスク。
JP1986113993U 1986-07-22 1986-07-22 Pending JPS6322660U (ja)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP1986113993U JPS6322660U (ja) 1986-07-22 1986-07-22
US07/168,125 US4877667A (en) 1986-07-22 1987-05-28 Optical disc with inhibited thermal distortion
DE8787903433T DE3783353D1 (de) 1986-07-22 1987-05-28 Optische speicherplatte.
EP87903433A EP0277235B1 (en) 1986-07-22 1987-05-28 Optical disc
KR1019880700296A KR910008504B1 (ko) 1986-07-22 1987-05-28 광디스크
PCT/JP1987/000343 WO1988000755A1 (en) 1986-07-22 1987-05-28 Optical disc
CN87105175A CN1007187B (zh) 1986-07-22 1987-07-21 光盘

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1986113993U JPS6322660U (ja) 1986-07-22 1986-07-22

Publications (1)

Publication Number Publication Date
JPS6322660U true JPS6322660U (ja) 1988-02-15

Family

ID=30996317

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1986113993U Pending JPS6322660U (ja) 1986-07-22 1986-07-22

Country Status (1)

Country Link
JP (1) JPS6322660U (ja)

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