EYEPIECE Russian patent published in 2012 - IPC G02B25/00 

FIELD: instrument making.

SUBSTANCE: eyepiece comprises a beam splitter prism installed in front of the first lens component, and the following components arranged along with the beam way: a plano-convex single lens facing the space of objects with flat surface, and a tape joint from convexo-convex and negative lenses facing the space of objects with the convexo-convex lens. The negative lens is made of material with dispersion ratio v_D of not more than 30. Positive lenses are made of material with dispersion ratio v_D of at least 60. The beam-splitter prism is made in the form of a cube prism. Optical forces of the single lens and a taped component are selected under the following conditions: φ₁=0.40…0.60φ_eyp, φ₂=0.40…0.60 φ _eyp, where φ _eyp - optical force of the eyepiece.

EFFECT: provision of the possibility of installation into the additional channel of the liquid-crystal eyepiece with simultaneous reduction of dimensions, weight and cost.

4 dwg, 1 tbl