JPS634528U

JPS634528U -

Info

Publication number: JPS634528U
Application number: JP1986095976U
Authority: JP
Priority date: 1986-06-25
Filing date: 1986-06-25
Publication date: 1988-01-13

Description

[Brief explanation of the drawing]

第１図は本考案の測光装置を電子カメラに適用
した場合の光学系の概略図、第２図はその一部の
斜視図、第３図は測光装置の正面図、第４図は測
光手段の平面図である。１……撮影レンズ、２……可動鏡、９……フオ
ーカシングスクリーン、１０……第１プリズム、
１１……第２プリズム、１２……接眼レンズ、１
３……観察用の瞳、１４，１４′……採光窓、１
５，１５′……測光手段、１６，１６′……結像
光学系。 Fig. 1 is a schematic diagram of an optical system when the photometric device of the present invention is applied to an electronic camera, Fig. 2 is a perspective view of a part thereof, Fig. 3 is a front view of the photometric device, and Fig. 4 is a photometric means. FIG. 1... Shooting lens, 2... Movable mirror, 9... Focusing screen, 10... First prism,
11...Second prism, 12...Eyepiece, 1
3... Eye for observation, 14, 14'... Lighting window, 1
5, 15'...photometric means, 16, 16'...imaging optical system.

Claims

[Claims for Utility Model Registration] (1) An incident surface S1 for making the light beam for observing an object image incident, and a light beam incident from _the incident surface _S1 on the same plane as the incident surface _S1 . A first reflecting surface _S 2 for reflecting in the direction of a certain second reflecting surface S ₁ ′, the first reflecting surface S ₂ and the second reflecting surface S ₁ ′.
Exit surface _S3 for emitting the reflected light flux in the order of a first prism having a first prism, an entrance surface _S4 for allowing the light flux emerging from the exit surface _S3 of the first prism to enter, and a plane SS that is the same as the entrance surface _S4 .
A _roof surface S 5 consisting of two reflecting surfaces S ₅ and S ₅ ′ for reflecting in the direction of the fourth reflecting surface S ₄ ′ _{on
5} ' and an exit surface _S6 for emitting the light beam reflected in the order of the roof surface _S55' and the fourth reflecting surface _S4 ', and the exit surface of the first prism A finder optical system in which the entrance surface _S4 of the second prism is formed narrower than the width of the second prism _S3 , and the entrance surface _S4 of the second prism is superimposed on the central part of the exit surface _S3 of the first prism. The light emitted from the exit surface S ₃ of the first prism on both sides of the entrance surface S ₄ of the second prism is closely opposed to the exit surface S ₃ of the first prism on both sides of the second prism. A photometric device characterized in that light is guided through photometric means arranged respectively. (2) The photometric device according to claim 1, wherein the photometric device is a photometric device that measures light by dividing a field into a plurality of regions.