JPS6324536U

JPS6324536U -

Info

Publication number: JPS6324536U
Application number: JP4144586U
Authority: JP
Priority date: 1986-03-20
Filing date: 1986-03-20
Publication date: 1988-02-18

Description

[Brief explanation of drawings]

第１図は本考案に係る実施例の光学系を模式的
に示す図、第２図は第１図に示す実施例において
凹レンズと凸レンズが許容される範囲内にて最も
接近した状態での光路を示す図、第３図Ａ，Ｂ，
Ｃはそれぞれ第１図に示した実施例に係る光学式
ビユーフアインダの使用態様を示す図、第９図は
本考案に係る他の実施例の光学系を模式的に示す
図、第５図は同じく他の実施例における光路を示
す図、第６図は一般的な逆ガリレオ型の光学系を
示す図、第７図はカメラ本体と光学式ビユーフア
インダの位置関係を示す図、第８図は鏡筒を長く
した逆ガリレオ型の光学系を示す図、第９図は他
の光学式ビユーフアインダの光学系を示す図であ
る。１０……鏡筒、１１……入射部、１２……凹レ
ンズ、１３……凸レンズ、１４……接眼部、ｌ_１……光軸。 Fig. 1 is a diagram schematically showing the optical system of the embodiment according to the present invention, and Fig. 2 shows the optical path in the embodiment shown in Fig. 1 when the concave lens and the convex lens are closest to each other within the allowable range. Figure 3 A, B,
C is a diagram showing how the optical view indexer according to the embodiment shown in FIG. 1 is used, FIG. 9 is a diagram schematically showing the optical system of another embodiment according to the present invention, and FIG. A diagram showing the optical path in another embodiment, FIG. 6 is a diagram showing a general inverted Galileo type optical system, FIG. 7 is a diagram showing the positional relationship between the camera body and the optical viewfinder, and FIG. 8 is a diagram showing the lens barrel. FIG. 9 is a diagram showing an optical system of an inverted Galilean type with a longer length, and FIG. 9 is a diagram showing an optical system of another optical view finder. 10... Lens barrel, 11... Incident part, 12... Concave lens, 13... Convex lens, 14... Eyepiece part, l ₁ ……optical axis.

補正昭６２．９．１６図面の簡単な説明を次のように補正する。明細書第１６頁第１３行に記載された「第９図
」を「第４図」と補正する。Amendment September 16, 1982 The brief description of the drawing is amended as follows. "Fig. 9" written on page 16, line 13 of the specification is corrected to "Fig. 4."

Claims

[Claims for Utility Model Registration] A concave lens disposed near an entrance portion formed at one end of the lens barrel, and a concave lens located on the same optical axis as the concave lens and disposed at the other end of the lens barrel. An optical viewfinder comprising a convex lens, characterized in that the convex lens is arranged closer to the concave lens than to an eyepiece formed at the other end of the lens barrel within a range that does not cause image vignetting. Optical viewfinder.