JPH0486225U - - Google Patents

Info

Publication number
JPH0486225U
JPH0486225U JP13070590U JP13070590U JPH0486225U JP H0486225 U JPH0486225 U JP H0486225U JP 13070590 U JP13070590 U JP 13070590U JP 13070590 U JP13070590 U JP 13070590U JP H0486225 U JPH0486225 U JP H0486225U
Authority
JP
Japan
Prior art keywords
pickup device
hologram
hologram element
optical
collimator lens
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
JP13070590U
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 JP13070590U priority Critical patent/JPH0486225U/ja
Publication of JPH0486225U publication Critical patent/JPH0486225U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Optical Head (AREA)

Description

【図面の簡単な説明】
第1図は本考案の一実施例を示す要部斜視図、
第2図は従来例を示す要部斜視図である。 1……デイスク、2……対物レンズ、3……コ
リメータレンズ、4……ミラーあるいはプリズム
、5……ホログラム素子、6……フオトダイオー
ド、7……ホログラム、8……回析格子、9……
レーザーダイオード。

Claims (1)

    【実用新案登録請求の範囲】
  1. 平板ビームスプリツターの光分岐機能とウエツ
    ジプリズムの誤差信号生成機能を合わせ持つたホ
    ログラム素子を用いた光ピツクアツプ装置におい
    て、ホログラム素子とコリメータレンズの間に反
    射部材を配置し、光学系内の進路を曲げてなるこ
    とを特徴とするホログラムピツクアツプ装置。
JP13070590U 1990-11-30 1990-11-30 Pending JPH0486225U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13070590U JPH0486225U (ja) 1990-11-30 1990-11-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13070590U JPH0486225U (ja) 1990-11-30 1990-11-30

Publications (1)

Publication Number Publication Date
JPH0486225U true JPH0486225U (ja) 1992-07-27

Family

ID=31878022

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13070590U Pending JPH0486225U (ja) 1990-11-30 1990-11-30

Country Status (1)

Country Link
JP (1) JPH0486225U (ja)

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