JPS6129308U - objective lens - Google Patents

objective lens

Info

Publication number
JPS6129308U
JPS6129308U JP11386484U JP11386484U JPS6129308U JP S6129308 U JPS6129308 U JP S6129308U JP 11386484 U JP11386484 U JP 11386484U JP 11386484 U JP11386484 U JP 11386484U JP S6129308 U JPS6129308 U JP S6129308U
Authority
JP
Japan
Prior art keywords
lens body
objective lens
flange
positioning groove
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
JP11386484U
Other languages
Japanese (ja)
Inventor
一郎 森下
Original Assignee
アルプス電気株式会社
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 by アルプス電気株式会社 filed Critical アルプス電気株式会社
Priority to JP11386484U priority Critical patent/JPS6129308U/en
Publication of JPS6129308U publication Critical patent/JPS6129308U/en
Pending legal-status Critical Current

Links

Landscapes

  • Lens Barrels (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案に半る対物レンズの一実施例を示す断面
図、第２図は従来の対物レンズの断面図、第３図は対物
レンズの使用例として光学式ピックアップを示す構成図
である。 ２０・・・プレスレンズ、２１・・・レンズ本体、２１
ａｔ２１ｂ・・・非球面、２２・・・位置決め溝、２４
・・・フランジ、３１・・・支持筒、３１ｂ・・・環状
部、３２・・・保護リング、α，β・・・接着溝。Fig. 1 is a sectional view showing an embodiment of the objective lens according to the present invention, Fig. 2 is a sectional view of a conventional objective lens, and Fig. 3 is a configuration diagram showing an optical pickup as an example of the use of the objective lens. be. 20... Press lens, 21... Lens body, 21
at21b...Aspherical surface, 22...Positioning groove, 24
...Flange, 31... Support tube, 31b... Annular part, 32... Protective ring, α, β... Adhesive groove.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] プレス工程によって形成された非球面のレンズ本体の周
囲には、材料の残余分が突出したフランジが形成されて
いるとともに、レンズ本体とフランジとの境界部には環
状の位置決め溝が形成されており、この位置決め溝が支
持細の上端に設置されることによって、レンズ本体が固
定されており、且つレ，ンズ本体の外面の周囲部分には
、保護リングが固設されていることを特徴とする対物レ
ンズ。A flange from which the remaining material protrudes is formed around the aspherical lens body formed by the pressing process, and an annular positioning groove is formed at the boundary between the lens body and the flange. , the lens body is fixed by installing this positioning groove at the upper end of the support strip, and a protective ring is fixedly installed around the outer surface of the lens body. objective lens.
JP11386484U 1984-07-26 1984-07-26 objective lens Pending JPS6129308U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11386484U JPS6129308U (en) 1984-07-26 1984-07-26 objective lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11386484U JPS6129308U (en) 1984-07-26 1984-07-26 objective lens

Publications (1)

Publication Number Publication Date
JPS6129308U true JPS6129308U (en) 1986-02-21

Family

ID=30672890

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11386484U Pending JPS6129308U (en) 1984-07-26 1984-07-26 objective lens

Country Status (1)

Country Link
JP (1) JPS6129308U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63178806U (en) * 1987-05-13 1988-11-18

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63178806U (en) * 1987-05-13 1988-11-18

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