JPS608935U - Small Album Daffinder - Google Patents

Small Album Daffinder

Info

Publication number
JPS608935U
JPS608935U JP10052383U JP10052383U JPS608935U JP S608935 U JPS608935 U JP S608935U JP 10052383 U JP10052383 U JP 10052383U JP 10052383 U JP10052383 U JP 10052383U JP S608935 U JPS608935 U JP S608935U
Authority
JP
Japan
Prior art keywords
optical member
eyepiece
lens
intermediate optical
finder
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
JP10052383U
Other languages
Japanese (ja)
Inventor
博文 松尾
Original Assignee
旭光学工業株式会社
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 旭光学工業株式会社 filed Critical 旭光学工業株式会社
Priority to JP10052383U priority Critical patent/JPS608935U/en
Publication of JPS608935U publication Critical patent/JPS608935U/en
Pending legal-status Critical Current

Links

Landscapes

  • Viewfinders (AREA)
  • Lenses (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図は従来のアルバダファインダーの構成を薄肉レン
ズで示した図、第２図は本考案の実施例１のレンズ断面
図、第３図は本考案の実施例２のレンズ断面図、第４図
は本考案の実施例３のレンズ断面図である。Fig. 1 is a diagram showing the structure of a conventional Albada finder using a thin lens, Fig. 2 is a cross-sectional view of the lens according to the first embodiment of the present invention, Fig. 3 is a cross-sectional view of the lens according to the second embodiment of the present invention, and Fig. 4 is a cross-sectional view of the lens according to the second embodiment of the present invention. The figure is a cross-sectional view of a lens according to Example 3 of the present invention.

Claims (1)

【実用新案登録請求の範囲】 １　負屈折力の対物レンズと正屈折力の接眼レンズとか
らなるアルバダファインダーにおいて、前記対物レンズ
と接眼レンズとの間に肉厚の中間光学部材を設け、該中
間光学部材の接眼レンズ側の面または接眼レンズの物体
側の面の少なくとも一方の面を光枠面とし、更に接眼レ
ンズと中間光学部材との合成焦点距離をＦｅｇ、ファイ
ンダー倍率をＭ、ファインダーの全長をＬとした時、 ０、５５Ｌ＜（１−Ｍ）−Ｆｅｇ＜０．７５Ｌを満足す
る事を特徴とする小型アルバダファインダー。 ２　中間光学部材は肉厚平行平面または屈折力の弱い肉
厚レンズである事を特徴とする実用新案登録請求の範囲
第１項記載の小型アルバダファインダー。[Claims for Utility Model Registration] 1. In an Albada finder comprising an objective lens with negative refractive power and an eyepiece lens with positive refractive power, a thick intermediate optical member is provided between the objective lens and the eyepiece lens, and the intermediate optical member is provided with a thick intermediate optical member between the objective lens and the eyepiece lens. At least one of the eyepiece-side surface of the optical member or the object-side surface of the eyepiece is an optical frame surface, and the combined focal length of the eyepiece and intermediate optical member is Feg, the finder magnification is M, and the total length of the finder. A small Albada finder characterized by satisfying 0.55L<(1-M)-Feg<0.75L, where L is 0.55L<(1-M)-Feg<0.75L. 2. The compact Albada finder according to claim 1, wherein the intermediate optical member is a thick parallel plane or a thick lens with weak refractive power.
JP10052383U 1983-06-29 1983-06-29 Small Album Daffinder Pending JPS608935U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10052383U JPS608935U (en) 1983-06-29 1983-06-29 Small Album Daffinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10052383U JPS608935U (en) 1983-06-29 1983-06-29 Small Album Daffinder

Publications (1)

Publication Number Publication Date
JPS608935U true JPS608935U (en) 1985-01-22

Family

ID=30237765

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10052383U Pending JPS608935U (en) 1983-06-29 1983-06-29 Small Album Daffinder

Country Status (1)

Country Link
JP (1) JPS608935U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61270721A (en) * 1985-05-27 1986-12-01 Nippon Kogaku Kk <Nikon> Magnification conversion type reverse Galileo viewfinder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61270721A (en) * 1985-05-27 1986-12-01 Nippon Kogaku Kk <Nikon> Magnification conversion type reverse Galileo viewfinder

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