Periscope switchover mirror system

摘要

A switchover mirror system for a periscope has an even number of reflection surfaces for enabling an observer to view a first scene in a first sight direction forward of the observer and an uneven number of reflection surfaces for enabling the observer to view a second scene in a second sight direction rearward of the observer. One of the reflection surfaces is disposed on a member which is pivoted about a pivot axis arranged eccentrically with respect to the member. With a simple construction and a reduced number of movable elements, the image during switchover of the sight direction remains upright and similar fields of view are obtained at the same periscopic elevation as for mirrors which are not switched over.