JPH02135991U - - Google Patents

Info

Publication number
JPH02135991U
JPH02135991U JP1989045220U JP4522089U JPH02135991U JP H02135991 U JPH02135991 U JP H02135991U JP 1989045220 U JP1989045220 U JP 1989045220U JP 4522089 U JP4522089 U JP 4522089U JP H02135991 U JPH02135991 U JP H02135991U
Authority
JP
Japan
Prior art keywords
identify
allowing
utility
predetermined position
optical disc
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
JP1989045220U
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 JP1989045220U priority Critical patent/JPH02135991U/ja
Publication of JPH02135991U publication Critical patent/JPH02135991U/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、第2図は本考案に係る光デイスクの一
実施例の平面図、第3図はプリフオーマツト領域
上の光ビームの走査を説明するために図、第4図
は光デイスクの円周方向に沿つた反射率変動の様
子を示す図、第5図は光デイスクの作製工程を示
す図、第6図はスタンパの複製工程を示す図であ
る。 1……光デイスク、2……記録領域、3……プ
リフオーマツト領域、4……ピツト列領域、D…
…ピツト列領域間の間隔。

Claims (1)

    【実用新案登録請求の範囲】
  1. 回転方向をドライブシステムに識別させるため
    のプリフオーマツト領域が所定の位置に形成され
    ていることを特徴とする光デイスク。
JP1989045220U 1989-04-18 1989-04-18 Pending JPH02135991U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1989045220U JPH02135991U (ja) 1989-04-18 1989-04-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989045220U JPH02135991U (ja) 1989-04-18 1989-04-18

Publications (1)

Publication Number Publication Date
JPH02135991U true JPH02135991U (ja) 1990-11-13

Family

ID=31559199

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989045220U Pending JPH02135991U (ja) 1989-04-18 1989-04-18

Country Status (1)

Country Link
JP (1) JPH02135991U (ja)

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