Optical imaging lens system including ten lenses of ++−++−+−+−, ++−++−−−+−, ++−+−+−+−−, ++−+++−+−−, −+−+++−+−−, ++−++−−++−, ++−+−−+−+−, or ++−+−−−−+− refractive powers, image capturing unit and electronic device

Abstract

An optical imaging lens system includes ten lens elements which are, in order from an object side to an image side along an optical path: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element, an eighth lens element, a ninth lens element and a tenth lens element. Each of the ten lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The second lens element has positive refractive power. The image-side surface of the tenth lens element is concave in a paraxial region thereof, and the image-side surface of the tenth lens element has at least one inflection point.