Abstract: A superimposing image apparatus for superimposing a first view on a second view, including an optical imaging system which has a given focal length, an image plane and given field of view which encompasses the second view, and an arrangement for translationally moving a first mirror within the aforesaid field of view and positioned so as to project at least a part of the first view into the lens system, superimposed on the second view.In accordance with a second feature, there is provided a superimposed image apparatus wherein at least one of the first and second views is disposed at the given focal length of the lens system.In accordance with still another feature, there is provided superimposing image apparatus which includes a second mirror disposed outside the field of view for reflecting the first view onto the first mirror.