Optical sighting device mounted on a vehicle on the outside of the latter

摘要

The invention relates to an optical sighting device of the type including an optical system 12 mounted so as to move in rotation in relation to the structure 14 of the vehicle, for example about a bearing axis Z-Z and an elevation axis Y-Y. In order to reduce or eliminate disturbing aerodynamic effects being applied to the movable system 12, the invention is designed to provide the sight 10 with an aerodynamic protective cowling (shroud) 34 having a profile of revolution about the bearing axis Z-Z. The protective cowling 34 may be fixed to the base 24 or be rotationally slaved to the movements of the latter. The invention applies especially to the field of firing sights for combat helicopters. <IMAGE>