OPTICAL SIGHT WITH VARIABLE MAGNIFICATION Russian patent published in 2022 - IPC F41G1/38 G02B23/00 

FIELD: optical instrumentation.

SUBSTANCE: invention relates to the field of optical instrumentation and concerns an optical sight with variable magnification. The sight consists of a lens, a collecting lens, a parallel-sided plate, on the first surface of which a grid is applied, a wrapping system, a field diaphragm, a fixed negative component and an eyepiece. The lens is made of two positive components. The parallel-sided plate is glued with a collecting lens made in the form of a plane-convex lens facing the bulge to the plane of objects. The inverting system contains two components consisting of a positive lens and a two-lens bonding, and is made with the possibility of differentiated movement of components along the optical axis. A negative lens forming a fixed negative component is installed behind the plane of the second real image in front of the eyepiece. The eyepiece contains a positive two-lens glued component and a single positive lens. The parallel-sided plate and the inverting system are made swinging together around a point aligned with the axial point of the plane of the second real image.

EFFECT: reducing the length of the sight and increasing the angular field.

10 cl, 2 dwg, 1 tbl