JPH0178319U - - Google Patents

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Publication number
JPH0178319U
JPH0178319U JP1987175254U JP17525487U JPH0178319U JP H0178319 U JPH0178319 U JP H0178319U JP 1987175254 U JP1987175254 U JP 1987175254U JP 17525487 U JP17525487 U JP 17525487U JP H0178319 U JPH0178319 U JP H0178319U
Authority
JP
Japan
Prior art keywords
recording medium
pickup device
information recording
optical pickup
information
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
JP1987175254U
Other languages
English (en)
Other versions
JPH073463Y2 (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 JP17525487U priority Critical patent/JPH073463Y2/ja
Publication of JPH0178319U publication Critical patent/JPH0178319U/ja
Application granted granted Critical
Publication of JPH073463Y2 publication Critical patent/JPH073463Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Optical Head (AREA)

Description

【図面の簡単な説明】
第１図は、本考案の一実施例の概略側断面図、
第２図ａ及び第２図ｂは、それぞれ実施例の収束
位置での光束の断面形状及び受光素子のチツプ形
状を示す図、第３図ａ及び第３図ｂは、それぞれ
他の実施例の収束位置での光束の断面形状及び受
光素子のチツプ形状を示す図、第４図は、従来例
の概略側断面図である。 １ａ，１ｂ……半導体レーザー光源、３ａ，３
ｂ……ビームスプリツター、５……プリズム、６
……集光レンズ、７……光検出器、７ａ，７ｂ…
…受光素子、１０……デイスク状記録媒体、１２
ａ，１２ｂ……反射光、１２ａ′，１２ｂ′……
反射光の収束位置でのスポツト。

Claims (1)

    【実用新案登録請求の範囲】
  1. 波長の異なる複数個の光ビームで情報記録媒体
    を照射し、同時に複数の異なる情報の記録再生を
    行うように構成された光ピツクアツプ装置におい
    て、情報記録媒体から反射された信号光を同一の
    光路を経て光検出器に導く集光手段として、少な
    くとも片面が円弧状凸形状となつた断面形状を有
    する集光レンズを用いたことを特徴とする光ピツ
    クアツプ装置。
JP17525487U 1987-11-16 1987-11-16 光ピックアップ装置 Expired - Lifetime JPH073463Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17525487U JPH073463Y2 (ja) 1987-11-16 1987-11-16 光ピックアップ装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17525487U JPH073463Y2 (ja) 1987-11-16 1987-11-16 光ピックアップ装置

Publications (2)

Publication Number Publication Date
JPH0178319U true JPH0178319U (ja) 1989-05-26
JPH073463Y2 JPH073463Y2 (ja) 1995-01-30

Family

ID=31467060

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17525487U Expired - Lifetime JPH073463Y2 (ja) 1987-11-16 1987-11-16 光ピックアップ装置

Country Status (1)

Country Link
JP (1) JPH073463Y2 (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6027766A (en) 1997-03-14 2000-02-22 Ppg Industries Ohio, Inc. Photocatalytically-activated self-cleaning article and method of making same

Also Published As

Publication number Publication date
JPH073463Y2 (ja) 1995-01-30

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