PLASTIC APOCHROMATIC LENS Russian patent published in 2012 - IPC G02B9/60 G02B13/14 G02B5/32 

FIELD: physics.

SUBSTANCE: lens consists of five components, the first of which is in form of a biconvex lens, the second consists of a negative meniscus whose convex surface faces the object, on which a holographic optical element with optical power equal to 0.005-0.015 times the optical power of the lens is deposited, and a biconvex lens whose larger convex surface faces the object; the third and fourth components are aspherical positive menisci whose convex surfaces face the object; the fifth component is a plane-parallel plate.

EFFECT: significant improvement in image quality, higher aperture ratio and reduced total length of the lens.

3 cl, 4 dwg, 2 tbl