Mechanical-optoelectronic angle comparator for determination of the angular position of a weapon mounted by a combat vehicle relative to the line of sight

Claim 1

A mechanical-optoelectronic angle comparator for determining the angular position relative to the line of sight of a weapon mounted on a combat vehicle having a sighting device comprising an objective mirror which pivots on a first axis that is parallel to the axis of rotation of the weapon, the comparator comprising: a. means for mechanically transmitting the angular position of the weapon comprising an intermediate member and means mounting same perpendicular to the axis of rotation of the objective mirror for pivotal movement about an axis of rotation coinciding with the first axis of rotation of the objective mirror and independent of the movement of the objective mirror; b. at least one deflecting mirror rigidly connected with the objective mirror to dispose the reflecting surface thereof parallel to the first axis of rotation; c. at least one light projecting means disposed on the intermediate member and having an optical axis perpendicular to the first axis of rotation of the objective mirror such that the light beam emanating therefrom impinges on the reflecting surface of a deflecting mirror; d. at least one electro-optical light sensing means fixed with respect to the first axis and comprising a plurality of aligned light-sensitive regions disposed such that within a predetermined range of angular positions of the intermediate member relative to the deflecting mirror there is at all times at least one light-sensitive region of the sensor field on which the light beam reflected by the deflecting mirror impinges; and e. means receptive of the output of the optical sensing means for electronically evaluating the region on which light impinges.