Test device for a rotating mirror, particularly for a stabilised rotating mirror in the mirror head of a periscope

摘要

A test deivce for a rotating mirror, operating in accordance with the autocolimation principle, is specified which is used for measuring the movement of the rotating mirror. For this purpose, a fixed mirror (12) aligned with an autocolimation periscope (11) exhibits a reflecting surface (24) which is composed of a multiplicity of planar reflecting-surface segments (25) which are combined with one another and inclined with respect to one another in such a manner that the cross-section of the reflecting surface (24) forms an inwardly inclined polygon. <IMAGE>