Optical lens assembly

Abstract

An optical lens assembly includes a first lens to a sixth lens in sequence along an optical axis from a light output side to a light input side. An optical axis region and a periphery region of a light input surface of the sixth lens are concave and convex surfaces, respectively. A periphery region of a light output surface of the sixth lens is a concave surface. The optical lens assembly satisfies conditional expressions of EDmax / EDmin≦2.100 and 3.000≦(D21t32+G56) / D11t21. EDmax and EDmin are maximum and minimum values of effective diameters. D21t32 is a distance from a light output surface of the second lens to a light input surface of the third lens. G56 is an air gap between the fifth and sixth lenses on the optical axis. D11t21 is a distance from a light output surface of the first lens to the light output surface of the second lens.