JPH01181134U - - Google Patents

Info

Publication number
JPH01181134U
JPH01181134U JP1988078471U JP7847188U JPH01181134U JP H01181134 U JPH01181134 U JP H01181134U JP 1988078471 U JP1988078471 U JP 1988078471U JP 7847188 U JP7847188 U JP 7847188U JP H01181134 U JPH01181134 U JP H01181134U
Authority
JP
Japan
Prior art keywords
transparent substrate
land portion
optical recording
uneven pits
recording medium
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.)
Granted
Application number
JP1988078471U
Other languages
English (en)
Other versions
JP2554514Y2 (ja
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 JP1988078471U priority Critical patent/JP2554514Y2/ja
Publication of JPH01181134U publication Critical patent/JPH01181134U/ja
Application granted granted Critical
Publication of JP2554514Y2 publication Critical patent/JP2554514Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Description

【図面の簡単な説明】
第１図は本考案の一実施例のプリフオーマツト
部とＴＥ信号との関係を示す説明図、第２図は光
学系構成を示す概略斜視図、第３図はプリフオー
マツト部及びランド部構成を展開的に示す説明図
、第４図は従来例を示す概略斜視図である。 １６……透明基板、１７……記録膜、２０……
案内溝、２１……ランド部、２３……凹凸ピツト
。

Claims (1)

    【実用新案登録請求の範囲】
  1. 波長λのレーザ光に対しλ／８相当の深さのト
    ラツク案内溝を複数本形成し、各トラツク案内溝
    間のランド部にプリフオーマツトによる凹凸ピツ
    トを予め形成した透明基板と、この透明基板上に
    形成された光吸収反射性を持つ光記録膜とからな
    る光記録媒体において、前記ランド部に予め形成
    する前記凹凸ピツトを、このランド部をトラツク
    方向に任意に抽出される長さ２００μｍ分の領域
    内に存在する１個又は複数個の凹凸ピツトの長さ
    の総和が５０μｍ以下となる長さに形成したこと
    を特徴とする光記録媒体。
JP1988078471U 1988-06-14 1988-06-14 光記録媒体 Expired - Lifetime JP2554514Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988078471U JP2554514Y2 (ja) 1988-06-14 1988-06-14 光記録媒体

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988078471U JP2554514Y2 (ja) 1988-06-14 1988-06-14 光記録媒体

Publications (2)

Publication Number Publication Date
JPH01181134U true JPH01181134U (ja) 1989-12-27
JP2554514Y2 JP2554514Y2 (ja) 1997-11-17

Family

ID=31303395

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988078471U Expired - Lifetime JP2554514Y2 (ja) 1988-06-14 1988-06-14 光記録媒体

Country Status (1)

Country Link
JP (1) JP2554514Y2 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6224959B1 (en) 1998-01-23 2001-05-01 Seiko Epson Corporation Optical disc

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS615453A (ja) * 1984-06-19 1986-01-11 Ricoh Co Ltd 光デイスクメモリ媒体

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS615453A (ja) * 1984-06-19 1986-01-11 Ricoh Co Ltd 光デイスクメモリ媒体

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6224959B1 (en) 1998-01-23 2001-05-01 Seiko Epson Corporation Optical disc
WO2004081928A1 (ja) * 1998-01-23 2004-09-23 Kimio Nagasaka 光ディスク

Also Published As

Publication number Publication date
JP2554514Y2 (ja) 1997-11-17

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