OPTICAL IMAGING LENS AND ELECTRONIC DEVICE COMPRISING THE SAME

摘要

An optical imaging lens set has a first lens with an object-side with a convex portion near the optical axis, an image-side with a convex portion near its periphery, a second lens with an object-side with a convex portion near the optical axis and a concave portion near its periphery, a third lens with an object-side with a concave portion near its periphery and an image-side with a convex portion near the optical axis and a convex portion near its periphery, a fourth lens with an object-side with a convex portion near the optical axis and an image-side with a concave portion near the optical axis and a convex portion near its periphery. A total thickness ALT, the third lens thickness T3, the first lens Abbe number υ1 and the third lens Abbe number υ3 satisfy 20≦|υ1−υ3| and 3.3≦ALT/T3.

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, a second lens element, a third lens element and a fourth lens element, wherein:
said first lens element of positive refractive power has an object-side surface with a convex portion in a vicinity of said optical axis and an image-side surface with a convex portion in a vicinity of its periphery; said second lens element of negative refractive power has an object-side surface with a convex portion in a vicinity of said optical axis and with a concave portion in a vicinity of its periphery and an image-side surface with a concave portion in a vicinity of its periphery; said third lens element has an object-side surface with a concave portion in a vicinity of its periphery, and an image-side surface with a convex portion in a vicinity of said optical axis and with a convex portion in a vicinity of its periphery; and said fourth lens element has an object-side surface with a convex portion in a vicinity of said optical axis, and an image-side surface with a concave portion in a vicinity of said optical axis and with a convex portion in a vicinity of its periphery, the optical imaging lens set exclusively has said first lens element, said second lens element, said third lens element and said fourth lens element with refractive power and a total thickness ALT from said first lens element to said fourth lens element, a thickness T3 of said third lens element, the Abbe number υ1 of said first lens element and the Abbe number υ3 of said third lens element satisfy 20≦|υ1−υ3| and 3.3≦ALT/T3.