Reflex camera with electronic range finder

Details Reflex camera with electronic range finder Reflex camera with electronic range finder

1982-12-06

1984-05-08

Gellner, Michael L.

354478, G03B 300

Patent

active

044471432

ABSTRACT:
Disclosed is a reflex camera having a range finder assembly consisting of a focussing disk, field lens, pentaprism and eyepiece and having an electronic range finder wherein the imaging lens of the reflex camera projects an image of the object to be photographed onto a grating which is arranged in an image plane of the imaging objective lens and which acts as a spatial frequency filter. This image is projected through the pentaprism by means of a fully reflecting concave mirror ground onto the lower edge of the exit surface of the pentaprism. A photoelectric receiver system is associated with the grating, and a reflecting grooved grating is provided as the spatial frequency filter. The groove plane is arranged parallel or obliquely with respect to the image plane, so that the partial beams created by the splitting of the principal beam on the reflecting grooved grating are reflected back in the direction of the top edge surfaces of the pentaprism.

REFERENCES:
patent: 3953728 (1976-04-01), Leitz et al.

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