Patent ID: 6035140
Filing Date: 2000-03-07
Classification: G03B

Abstract:
A finder system for a camera, comprising:a real-image type first objective optical system;a real-image type second objective optical system, said second objective optical system being apart from said first objective optical system by a predetermined base length;a light combining element which composes light passed through said first and second objective optical systems to form superimposed images;an eyepiece optical system which guides light combined by said light combining element to a photographer's eye;an optical path deflection element which varies an angle of an optical axis of said second objective optical system with respect to an optical axis of said first objective optical system to vary degree of coincidence said superimposed images along said base length;a light transmission area defining element which is arranged in an optical path of said second objective optical system, said light transmission area defining element defining an area through which light entered said second objective optical system is allowed to transmit;a dual image area selection device which selects a dual image position, within which said superimposed images are observable, within a finder field, said dual image selection device controls said light transmission area defining element to define said light transmission area at a position corresponding to said dual image area;an object distance information detection device which detects information related to an object distance; anda controller which controls said optical path deflection element so that said superimposed images, which are formed by light incident from said first and second objective optical systems, of said object located at detected object distance coincide with each other based on a position within said finder field of said light transmission area set by said selection device and information related to said object distance output by said object distance information detection device.