OCULAR Russian patent published in 2009 - IPC G02B25/00 

FIELD: physics, optics.

SUBSTANCE: ocular comprises two components, the first of which along with direction of rays is two-lens and glued of concavo-concave and convexo-convex lenses, the second component is a convexo-convex lens. In ocular between structural parametres the following ratios are obtained: 1.64 < n₁ < 1.78; 1.59 < n₂ = n₃ < 1.62; |R₄| < |R₅|, |R₂| = |R₃| = |R₄|, where: n₁, n₂, n₃ are indices of refraction of material in the first, second and third lenses for line e; R₂, R₃, R₄, R₅ are radiuses of the second, third, fourth ad fifth optic surfaces.

EFFECT: increased angular field in images space and removal of exit pupil with high quality of image and level of manufacturability.

1 dwg