JPS63146312U - - Google Patents

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Publication number
JPS63146312U
JPS63146312U JP3940387U JP3940387U JPS63146312U JP S63146312 U JPS63146312 U JP S63146312U JP 3940387 U JP3940387 U JP 3940387U JP 3940387 U JP3940387 U JP 3940387U JP S63146312 U JPS63146312 U JP S63146312U
Authority
JP
Japan
Prior art keywords
semiconductor laser
laser element
recording medium
light
information recording
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
JP3940387U
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 JP3940387U priority Critical patent/JPS63146312U/ja
Publication of JPS63146312U publication Critical patent/JPS63146312U/ja
Pending legal-status Critical Current

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Description

【図面の簡単な説明】
第1図は本考案の一実施例による光学ヘツドの
光学系を示す構成図、第2図は半導体レーザ素子
の光出力特性図、第3図は従来の光学ヘツドの光
学系を示す構成図である。 1……半導体レーザ素子、2……コリメータレ
ンズ、3……ビームスプリツタ、4……1/4波
長板、5……対物レンズ、6……光デイスク、7
……集束レンズ、8……光検出器、9……増幅器
、10……ハーフプリズム、11……フアラデー
素子、12……マグネツト部。

Claims (1)

    【実用新案登録請求の範囲】
  1. 光源として半導体レーザ素子を備え、該半導体
    レーザ素子からの出射光を情報記録媒体上に照射
    し、該情報記録媒体で反射した戻り反射光を利用
    して、該情報記録媒体に記録された情報に対応す
    る電気信号を得る光学ヘツドにおいて、前記半導
    体レーザ素子の光出射部の前にフアラデー素子を
    配設し、前記半導体レーザ素子への戻り光の偏光
    面を、半導体レーザ素子からの出射光の偏光面に
    対し略90度回転させることを特徴とする光学ヘ
    ツド。
JP3940387U 1987-03-17 1987-03-17 Pending JPS63146312U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3940387U JPS63146312U (ja) 1987-03-17 1987-03-17

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3940387U JPS63146312U (ja) 1987-03-17 1987-03-17

Publications (1)

Publication Number Publication Date
JPS63146312U true JPS63146312U (ja) 1988-09-27

Family

ID=30852533

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3940387U Pending JPS63146312U (ja) 1987-03-17 1987-03-17

Country Status (1)

Country Link
JP (1) JPS63146312U (ja)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5755547A (en) * 1980-09-22 1982-04-02 Olympus Optical Co Ltd Information reader of photomagnetic recording medium

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5755547A (en) * 1980-09-22 1982-04-02 Olympus Optical Co Ltd Information reader of photomagnetic recording medium

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