公开(公告)号：US3599545A

公开(公告)日：1971-08-17

申请号：US3599545D

申请日：1970-02-03

Applicant: AGFA GEVAERT AG

Inventor： DURR HELMUT ,  KLEPEK GEORGE ,  VESPER RAINER

IPC: G03B7/083 ,  G03B17/20 ,  G01J1/08 ,  G01J1/44 ,  G03B7/02

CPC classification number: G03B7/083 ,  G03B17/20

Abstract: A photographic camera with electronic exposure control and an exposure time indicator. A time scale is arranged along the length of an elongated light source which provides light at uniform intensity and as a function of the brightness condition prevailing at the object to be photographed. The light intensity of the source is varied through a photosensitive element in the electronic exposure control unit. A light attenuating member in the form of a wedge-shaped element in front of the light source extends along the length of the timing scale and provides attenuation which varies continuously in a progressive manner from one end of the wedge-shaped element to the other. A glass member with interference layers and illuminated from an auxiliary light source, is arranged to provide more precise indicating results.