Optical imaging lens set and electronic device comprising the same

摘要

An optical imaging lens set includes: a first lens element with positive refractive power, a second lens element having an image-side surface with a concave portion in a vicinity of its periphery, a third lens element with positive refractive power, having a convex image-side surface, an object-side surface with a concave portion in a vicinity of its periphery, a fourth lens element having a concave object-side surface, and a plastic fifth lens element having an image-side surface with a concave portion in a vicinity of the optical axis. The total thickness T_a1 of the all lens elements along the optical axis, all four air gaps Gaa between each lens element along the optical axis, the thickness T₃ of the third lens element along the optical axis and the thickness T₅ of the fifth lens element along the optical axis satisfy the relation (T_a1+G_aa)/(T₃+T₅)≦4.00.