OPTOELECTRON OBSERVATION DEVICE Russian patent published in 2003 - IPC

FIELD: optoelectron equipment. SUBSTANCE: device incorporates lens, eye-piece, inversion system, grid placed in focal plane of eye-piece with range scale and north indicator, horizon- and-north indicating system using ferrosonde. Device has grid illumination grid that switches on in twilight. EFFECT: capability of control over device with single control element, reliable operation of device in twilight thanks to use of north indicator that shows direction to north in the field of vision of device, of grid with central mark and range scale and illumination of grid with use of light-emitting diodes. 2 dwg