JPS63138625U - - Google Patents

Info

Publication number
JPS63138625U
JPS63138625U JP3151287U JP3151287U JPS63138625U JP S63138625 U JPS63138625 U JP S63138625U JP 3151287 U JP3151287 U JP 3151287U JP 3151287 U JP3151287 U JP 3151287U JP S63138625 U JPS63138625 U JP S63138625U
Authority
JP
Japan
Prior art keywords
light beam
light
spot
light source
optical system
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
JP3151287U
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 JP3151287U priority Critical patent/JPS63138625U/ja
Publication of JPS63138625U publication Critical patent/JPS63138625U/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の概略構成図、第2
図a,bは光学素子の斜視図と一部拡大側面図、
第3図は他の実施例の概略構成図、第4図はレー
ザーダイオードの発光パターンの説明図、第5図
は従来の光学系の概略構成図である。 1……レーザーダイオード(光源)、2……対
物レンズ(集光手段)、3a……透過部分、3b
,3c……回折格子部分(回折部分)、B……
中心部光束、B,B……周辺部光束、BM…
…主光束、Bs,Bs……回折光、M……メ
インスポツト、S,S……サブスポツト。

Claims (1)

  1. 【実用新案登録請求の範囲】 光源と集光手段を備えてスポツト照射する光学
    系において、 光源からの発散光のうち中心部光束をそのまま
    透過してメインスポツト生成用の主光束とする透
    過部分と、該中心部光束外の周辺部光束を回折素
    子を介してサブスポツト生成用の回折光とする回
    折部分とを有する光学素子を備え、 該光学素子を前記光源と集光手段の間に配置し
    たことを特徴とする光学系。
JP3151287U 1987-03-04 1987-03-04 Pending JPS63138625U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3151287U JPS63138625U (ja) 1987-03-04 1987-03-04

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3151287U JPS63138625U (ja) 1987-03-04 1987-03-04

Publications (1)

Publication Number Publication Date
JPS63138625U true JPS63138625U (ja) 1988-09-13

Family

ID=30837318

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3151287U Pending JPS63138625U (ja) 1987-03-04 1987-03-04

Country Status (1)

Country Link
JP (1) JPS63138625U (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000045383A1 (en) * 1999-01-27 2000-08-03 Matsushita Electric Industrial Co., Ltd. Optical head
WO2006087843A1 (ja) * 2005-02-15 2006-08-24 Matsushita Electric Industrial Co., Ltd. 光ピックアップ

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000045383A1 (en) * 1999-01-27 2000-08-03 Matsushita Electric Industrial Co., Ltd. Optical head
WO2006087843A1 (ja) * 2005-02-15 2006-08-24 Matsushita Electric Industrial Co., Ltd. 光ピックアップ

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