| 摘要 |
FIELD: optoelectronic devices. SUBSTANCE: device has night-vision branch incorporating objective lens, electrooptic unit, and telescopic lens, as well as day-vision branch. Novelty is that additional off-axis lens is attached to second surface of first lens of night-vision branch which, together with first lens, forms off-axis telescopic lens; placed inside case of night-vision branch lens along cylindrical surface axis of additional off-axis lend are day-vision objective lens, first component of lens turning system, and two-way prism. When in one position, prism aligns optical axis of day-vision branch with that of next lens telescope common for night- and day-vision branches of optical system. In other position, prism is excluded from optical pass of night-vision branch. EFFECT: reduced size, weight, and cost; fixed position of hair-line in viewing both in the daytime and at night. |
