MOBILE DEVICE AND OPTICAL IMAGING LENS THEREOF

摘要

The optical imaging lens includes, sequentially from an object side to an image side, an aperture stop, first, second, third, fourth, and fifth lens elements. The first lens element is made of plastic. The object-side of the second lens element has a convex portion in a vicinity of its periphery. The third lens element has positive refracting power. The object-side surface of the fourth lens element has a concave portion in the vicinity of the optical axis, and the image-side surface of the fifth lens element has a concave portion in the vicinity of the optical axis. Though controlling the convex or concave shape of the surfaces and/or the refracting power of the lens elements, the optical imaging lens shows better optical characteristics and the total length of the optical imaging lens is shortened.

主权项

1. An optical imaging lens, sequentially from an object side to an image side, comprising an aperture stop, first, second, third, fourth, and fifth lens elements, each of the first, second, third, fourth, and fifth lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side, wherein:
the first lens element is made of plastic; the object-side surface of the second lens element has a convex portion in a vicinity of its periphery; the third lens element has positive refracting power, and the object-side surface of the third lens element has a concave portion in a vicinity of its periphery; the object-side surface of the fourth lens element has a concave portion in a vicinity of an optical axis; the image-side surface of the fifth lens element has a concave portion in a vicinity of the optical axis; and the optical imaging lens as a whole has only the five lens elements having refracting power.