JPH03127301U - - Google Patents

Info

Publication number
JPH03127301U
JPH03127301U JP3551890U JP3551890U JPH03127301U JP H03127301 U JPH03127301 U JP H03127301U JP 3551890 U JP3551890 U JP 3551890U JP 3551890 U JP3551890 U JP 3551890U JP H03127301 U JPH03127301 U JP H03127301U
Authority
JP
Japan
Prior art keywords
main surface
diffraction grating
utility
polarizing film
polarizing
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
JP3551890U
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 JP3551890U priority Critical patent/JPH03127301U/ja
Publication of JPH03127301U publication Critical patent/JPH03127301U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Optical Head (AREA)

Description

【図面の簡単な説明】
第１図は本考案に係る回折格子を示す図、第２
図は本考案に係る回折格子を用いて光ピツクアツ
プを構成した場合の概略構成を示す図、第３図は
従来の光ピツクアツプを示す図、第４図はトラツ
キング検出機構を説明するための図である。 １１……回折格子、１２……回折格子部、１３
……偏光膜、１４……レーザダイオード、１５…
…コリメートレンズ、１７……対物レンズ、１８
……集光レンズ、１９……光デイテクター、２０
……デイスク。

Claims (1)

    【実用新案登録請求の範囲】
  1. 光学的等方性基板の一方の主面に凹凸状の周期
    格子を設けると共に、他方の主面に偏光機能を有
    す偏光膜を形成したことを特徴とする回折格子。
JP3551890U 1990-04-02 1990-04-02 Pending JPH03127301U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3551890U JPH03127301U (ja) 1990-04-02 1990-04-02

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3551890U JPH03127301U (ja) 1990-04-02 1990-04-02

Publications (1)

Publication Number Publication Date
JPH03127301U true JPH03127301U (ja) 1991-12-20

Family

ID=31540946

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3551890U Pending JPH03127301U (ja) 1990-04-02 1990-04-02

Country Status (1)

Country Link
JP (1) JPH03127301U (ja)

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