Optical lens assembly

Abstract

An optical lens assembly includes: in order from an object side to an image side: a first lens with positive refractive power, including an image-side surface being convex in a paraxial region thereof; a second lens with negative refractive power, a third lens; and a fourth lens. Wherein a thickness of the third lens at a maximum effective diameter position of the third lens is ET3, a thickness of the fourth lens at a maximum effective diameter position of the fourth lens is ET4, and the following condition is satisfied: 0.48<ET3/ET4<1.50.

Dependencies are inferred from the claim text.