JPH0190117U - - Google Patents

Info

Publication number
JPH0190117U
JPH0190117U JP18761287U JP18761287U JPH0190117U JP H0190117 U JPH0190117 U JP H0190117U JP 18761287 U JP18761287 U JP 18761287U JP 18761287 U JP18761287 U JP 18761287U JP H0190117 U JPH0190117 U JP H0190117U
Authority
JP
Japan
Prior art keywords
semi
reflective surface
objective lens
optical
receiving element
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
JP18761287U
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 JP18761287U priority Critical patent/JPH0190117U/ja
Publication of JPH0190117U publication Critical patent/JPH0190117U/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図は本考案の実施例による光ピツクアツプ
の光学装置を示す部品配置図、第2図は半導体レ
ーザへの戻り光の割合とS/N比との関係を示す
線図、第3図は従来の光ピツクアツプの光学装置
を示す部品の配置図である。 D……光デイスク、1……半導体レーザ、4…
…コリメートレンズ、7……対物レンズ、9……
受光素子、13……無偏光ビームスプリツタ、1
3a……半反射面。

Claims (1)

    【実用新案登録請求の範囲】
  1. 光デイスクに対向する対物レンズと、この対物
    レンズの光路延長上にて斜めに配置された半反射
    面と、半反射面の反射方向ならびに半反射面の透
    過方向の各々の位置に配置された半導体レーザな
    らびに受光素子とを有している光ピツクアツプの
    光学装置において、前記半反射面の反射率が25
    〜35%に形成されていることを特徴とする光ピ
    ツクアツプの光学装置。
JP18761287U 1987-12-08 1987-12-08 Pending JPH0190117U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18761287U JPH0190117U (ja) 1987-12-08 1987-12-08

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18761287U JPH0190117U (ja) 1987-12-08 1987-12-08

Publications (1)

Publication Number Publication Date
JPH0190117U true JPH0190117U (ja) 1989-06-14

Family

ID=31478753

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18761287U Pending JPH0190117U (ja) 1987-12-08 1987-12-08

Country Status (1)

Country Link
JP (1) JPH0190117U (ja)

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