JPH01157301U - - Google Patents

Info

Publication number
JPH01157301U
JPH01157301U JP5410088U JP5410088U JPH01157301U JP H01157301 U JPH01157301 U JP H01157301U JP 5410088 U JP5410088 U JP 5410088U JP 5410088 U JP5410088 U JP 5410088U JP H01157301 U JPH01157301 U JP H01157301U
Authority
JP
Japan
Prior art keywords
beam splitter
reflected light
fresnel
angle
pass
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
JP5410088U
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 JP5410088U priority Critical patent/JPH01157301U/ja
Publication of JPH01157301U publication Critical patent/JPH01157301U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Optical Elements Other Than Lenses (AREA)
  • Optical Head (AREA)

Description

【図面の簡単な説明】
第1図は本考案に係るビームスプリツタを用い
た光ピツクアツプ装置の概略構成図、第2図、第
3図はそれぞれ本実施例のビームスプリツタの構
成図、第4図は一般的な光ピツクアツプ装置の概
略構成図、第5図a,bはトラツク検出の仕方を
説明するための図、第6図a乃至cは焦点検出の
仕方を説明するための図、第7図、第8図は従来
のビームスプリツタの断面図である。 1,2…ビームスプリツタ、3…ダハプリズム
、4,6,7,9…ビームスプリツタの面、5,
8…分割面、θ,θ,θ,θ…角度、T
,T…透過光、R,R…反射光、T
,T′,R′,R′…フレネル反射された
光。

Claims (1)

    【実用新案登録請求の範囲】
  1. フレネル反射された光が元の光路を通らないよ
    うな角度をフレネル反射を生ずる面にもたせたこ
    とを特徴とするビームスプリツタ。
JP5410088U 1988-04-21 1988-04-21 Pending JPH01157301U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5410088U JPH01157301U (ja) 1988-04-21 1988-04-21

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5410088U JPH01157301U (ja) 1988-04-21 1988-04-21

Publications (1)

Publication Number Publication Date
JPH01157301U true JPH01157301U (ja) 1989-10-30

Family

ID=31280044

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5410088U Pending JPH01157301U (ja) 1988-04-21 1988-04-21

Country Status (1)

Country Link
JP (1) JPH01157301U (ja)

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