An ultra-wide-angle imaging lens assembly with five lenses

摘要

An imaging lens assembly comprises a fixing diaphragm (30) and an optical set including five lenses. An arranging order from an object side to an image side is: a first lens (10); a second lens (20); a third lens (40); a fourth lens (50) having a lens with a positive refractive power defined near the optical axis and a convex surface directed toward the image side; and a fifth lens (60) having a concave surface with a corrugated contour directed toward the image side and disposed near the optical axis. At least one surface of the five lenses (10),(20),(40),(50),(60) is aspheric. By the concatenation between the lenses and the adapted curvature radius, thickness, interval, refractivity, and Abbe numbers, the assembly attains a big diaphragm with ultra-wide-angle, a shorter height, and a better optical aberration.