TELESCOPIC OPTICAL SYSTEM OF GALILEO TYPE Russian patent published in 2015 - IPC G02B23/00 

FIELD: measurement equipment.

SUBSTANCE: telescopic optical system of Galileo type consists of a lens and an eyepiece along beams. The lens is made in the form of two components, the first of which along beams is glued from a convexo-convex and concavo-concave lenses, the second one - a single convexo-convex lens, besides, the radius of its first surface by the module is equal to the radius of the second surface of the convexo-convex lens of the first component of the lens. The eyepiece represents a single concavo-concave lens with radii equal by module. For the refraction index of the material of the second component of the lens the following ratio is met 1.61<n₃<1.71.

EFFECT: increased diameter of an inlet pupil and a field angle in space of objects, increased visible increase with high quality of an image.

1 dwg, 2 tbl