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 Ta1 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 (Ta1+Gaa)/(T3+T5)≦4.00.

主权项

1. An optical imaging lens set, from an object side toward an image side in order along an optical axis comprising:
an aperture stop; a first lens element with positive refractive power; a second lens element having a second image-side surface facing toward said image side and said second image-side surface having a concave portion in a vicinity of a circular periphery of said second lens element; a third lens element with positive refractive power, having a convex third image-side surface facing toward said image side and a third object-side surface facing toward said object side, and said third object-side surface having a concave portion in a vicinity of a circular periphery of said third lens element; a fourth lens element having a concave fourth object-side surface facing toward said object side; and a plastic fifth lens element having a fifth image-side surface facing toward said image side and said fifth image-side surface having a concave portion in a vicinity of said optical axis,wherein said optical imaging lens set exclusively has five lens elements with refractive power, and a total thickness Ta1 of said first lens element, said second lens element, said third lens element, said fourth lens element and said fifth lens element along said optical axis, all four air gaps Gaa between each lens element from said first lens element to said fifth lens element along the optical axis, the thickness T3 of said third lens element along said optical axis and the thickness T5 of the fifth lens element along the optical axis satisfy the relation (Ta1+Gaa)/(T3+T5)≦4.00 and an air gap G23 between said second lens element and said third lens element along said optical axis, an air gap G34 between said third lens element and said fourth lens element along said optical axis, and an air gap G45 between said fourth lens element and said fifth lens element along said optical axis satisfy a relationship 1.20≦(G23)/(G34+G45).