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Viewfinder-for-reflex-camera

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Viewfinder for reflex camera

Details

Inventors: Matsui, Sei;
Assignee: Nippon Kogaku K. K. (Tokyo, JP)
Primary Examiner: Griffin; Donald A.
Assistant Examiner:
Attorney, Agent or Firm: Shapiro and Shapiro

A viewfinder for a reflex camera for viewing the image formed through an objective lens comprises a reflecting member for reflecting a light flux from the objective lens in a predetermined direction, a transparent member for passing the reflected light therethrough, and a mat surface located at the exit side of the transparent member and convexly curved toward the entrance side of the transparent member. Thus, the image plane formed by the light flux passed from the objective lens through the transparent member is coincident with the mat surface convexly curved toward the entrance side.

DETAILED DESCRIPTION It is an object of the invention to provide a viewfinder in which the point of focus is coincident over the entire view field of the mat surface while keeping the construction of the camera compact and light.
According to the invention, a viewfinder for a reflex camera for viewing the image formed through an objective lens comprises a reflecting member for reflecting a light flux from the objective lens in a predetermined direction, a transparent member for passing therethrough the reflected light from the reflecting member, and a mat surface located on the exit side of the transparent member and convexly curved toward the entrance side of the transparent member, whereby the image plane formed by the light flux passed from the objective lens through the transparent member is coincident with the mat surface convexly curved as aforesaid.
The invention will become more fully apparent from the following detailed description thereof taken in conjunction with the accompanying drawings.

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