DOUBLE-CHANNEL NIGHT VIEWING SIGHT Russian patent published in 2007 - IPC F41G1/32 G02B23/12 

FIELD: device of optical guidance or aiming, applicable as a passive night viewing device in the portable antiaircraft missile complex.

SUBSTANCE: the double-channel night viewing sight has an optoelectronic channel for observation of airspace, it includes an inlet optical system, electro-optical transducer, reticule, outlet optical system and a mirror fastened on a rotary fork. The inlet optical system of the optoelectronic observation channel is made in the form of two aligned lenses along focal-length lens and a short-focus lens, it is provided with a mechanism of their series connection to the optoelectronic channel (linked with the rotary fork) with the right-hand eye-piece of the outlet optical system. The left-hand element of the outlet optical system serves as a pseudoeye-piece, forming the channel of visual representation of information of the preliminary target indication, and an indication board for luminescence on it of the represented information of target indication is installed in its focal plane, it is connected by a glass-fiber bundle to the target lock-on indicator.

EFFECT: enhanced efficiency of search of an air target in the dark time of the day, enhanced range of its detection and reliability of tracking.

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