NIGHT/DAY VIEWING DEVICE Russian patent published in 1996 - IPC

FIELD: visual observation of remote objects at night and day time. SUBSTANCE: device has night and day channels, which have common eye-piece. Night channel has objective and image converter tube; both units are placed in align. Day channel has objective, device for deflecting beams made in form of swinging mirror, and erecting system. Night channel has prism mounted behind image converter tube, and erecting system formed by two lens groups. The first one is mounted behind the prism, and the second one - between the mirrors, which are used for erecting image in day channel. the second lens group plays a role of imaging object of day channel, plane image of which channel coincides with plane of image in night channel. Beam deflecting unit is disposed between lens groups of erecting system along parallel path of beams. Axis of rotation of swinging mirror is perpendicular to axis of the first lens group. EFFECT: improved reliability of operation. 2 cl, 4 dwg