RU2017144456A - OPTICAL SIGHT WITH DISCRETE CHANGE INCREASE - Google Patents

Claims (16)

1. Optical sight with a discrete change of magnification, containing a lens, a grid moved perpendicular to the optical axis to change the direction of the sight axis of the sight, a wrapping system and an eyepiece, characterized in that the wrapping system is made of one component consisting of successively biconvex lenses, negative meniscus facing the concavity to the object, negative biconcave lenses, positive flat convex lenses, facing the plane to the object that and the positive meniscus convex to the object, and the reversing system, when the magnification is changed, moves along the optical axis to two extreme positions, and the following relations are fulfilled: OC _0C = (3 ÷ 9) ⋅OC _0B , δ _0С = (0,2 ÷ 0,6) ⋅F _OB , where OS _{operating system} ^_ the optical power of the relay system; OS _OB is the optical power of the objective lens; δ _OS - the amount of movement of the wrapping system along the optical axis; F _OB - focal length of the objective lens. 2. Optical sight with a discrete change of magnification according to claim. 1, characterized in that the lens is made in the form of successively along the rays of a positive biconvex lens, a negative meniscus with a concavity toward the object, a positive meniscus convex to the object and a positive flat convex collective lens convexity to the object, and the eyepiece is made in the form of four single lenses, the first of which is a negative meniscus, facing its concavity towards the object, the second is biconcave negative lens, the third and fourth - positive biconvex lenses, while the following relationship holds: d ₂₆ = (0.03 ÷ 0.3) ОКF _OK , where d ₂₆ is the air gap between the negative meniscus and the biconcave negative lens of the eyepiece; F _OK - focal length of the eyepiece sight. 3. Optical sight with a discrete change of magnification according to claim 2, characterized in that it contains a second grid located between the wrapping system and the eyepiece, the center of which is aligned with the optical axis of the sight and with the plane of the second intermediate image, and changing the direction of the sighting axis of the sight that the optical axis on which the first grid, the wrapping system and the second grid are located, is made swinging with respect to the optical axis of the sight, with the center of swing being aligned with the center of the second grid, while The following relationship holds true:

, where ϕ is the swing angle of the optical axis of the components consisting of the first grid, the reversing system and the second grid, relative to the optical axis of the sight; Δ ₁ - the amount of lateral displacement of the first grid, corresponding to the maximum specified range of alignment of the sight; L _1-2 - the distance between the centers of the first and second grids.