Laser guidance signal receiving window for missile propagation, has two triangular wedges, of which one wedge has rear face, which rejects incoming radiation along preset direction below base plane

摘要

The window (14) has triangular wedges (16,20) made of optical material and are mutually separated by an air gap (18). The rear face of the wedge (16) is arranged at an acute angle to its entry face. The entry face of the wedge (20) is arranged at the same former angle to a base plane (21). The rear face of the wedge (16) is contoured to reject incoming radiation from preset direction below base plane.