US Patent 9565344 Optical imaging lens and electronic device comprising the same

An optical imaging lens set includes a first lens element having an image-side surface with a convex part in a vicinity of its periphery, a second lens element with negative refractive power having an image-side surface with a concave part in a vicinity of the optical axis, a third lens element having an object-side surface with a concave part in a vicinity of the optical axis, a fourth lens element having an image-side surface with a convex part in a vicinity of the optical axis, a fifth lens element having an image-side surface with a concave part in a vicinity of the optical axis, and a sixth lens element having an image-side surface with a convex part in a vicinity of its periphery.