JPS6296627U

JPS6296627U -

Info

Publication number: JPS6296627U
Application number: JP18736585U
Authority: JP
Priority date: 1985-12-06
Filing date: 1985-12-06
Publication date: 1987-06-19
Anticipated expiration: 2000-12-06
Also published as: JPH0524908Y2

Description

[Brief explanation of drawings]

第１図は、本考案の第１実施例に係るカメラフ
アインダ用プリズムを用いた一眼レフレツクスカ
メラの模式的構成を示す断面図、第２図は、本考
案の第２実施例に係るカメラフアインダ用プリズ
ムを用いた一眼レフレツクスカメラの模式的構成
を示す断面図、第３図は、本考案の第３実施例に
係るカメラフアインダ用プリズムを用いた一眼レ
フレツクスカメラの模式的構成を示す断面図であ
る。１０，１０′……撮影レンズ、２０……ミラー
、３０……フイルム、４０……フアインダスクリ
ーン、５０，６０，７０……プリズム、５１，６
１，７１……第１の面、５２，６２，７２……第
２の面、５３，６３，５３′……第３の面、５４
，６４……第４の面、５５……接眼レンズ。 FIG. 1 is a sectional view showing a schematic configuration of a single-lens reflex camera using a camera finder prism according to a first embodiment of the present invention, and FIG. FIG. 3 is a sectional view showing a schematic configuration of a single-lens reflex camera using a camera finder prism, and FIG. FIG. 3 is a cross-sectional view showing a schematic configuration. 10, 10'...Photographing lens, 20...Mirror, 30...Film, 40...Finder screen, 50,60,70...Prism, 51,6
1, 71...First surface, 52, 62, 72... Second surface, 53, 63, 53'... Third surface, 54
, 64... Fourth surface, 55... Eyepiece.

Claims

[Scope of utility model registration request]

The optical path switching mirror directs the emitted light from the photographic lens to the viewfinder side through a taking lens that obtains an erect image and an optical path switching mirror that switches the emitted light from the photographic lens to a position where it is guided to the film surface and a position where it is guided to the viewfinder side. In a camera viewfinder prism, the object image formed on the viewfinder screen disposed at the rear of the optical path when the camera is in the guiding position is used as an erect observation image. a first surface through which a light flux passing through the screen is incident and transmitting this light flux;
a second surface that reflects the light beam that has passed through the surface; and a second surface that reflects the light beam that has been reflected by the second surface or the light beam that has been reflected by the second surface and has been totally reflected by the first surface. and a fourth surface that emits the light beam reflected by the third surface and totally reflected by the first surface or the light beam reflected by the third surface. Features a prism for camera viewfinders.