Mobile device and optical imaging lens thereof

摘要

Present embodiments provide for a mobile device and an optical imaging lens thereof. The optical imaging lens comprises five lens elements positioned in an order from an object side to an image side. Through controlling the convex or concave shape of the surfaces of the lens elements to allow the thickness of the second lens element and the sum of all air gaps between all five lens elements along the optical axis satisfying the relation: 0.20

主权项

1. An optical imaging lens comprising, from an object side to an image side:
an aperture stop; a first lens element; a second lens element; a third lens element; a fourth lens element; and a fifth lens element, each of the first, second, third, fourth, and fifth lens element having an object-side surface facing toward the object side and an image-side surface facing toward the image side, wherein: the image-side surface of the first lens element has a concave portion in a vicinity of an optical axis; the object-side surface of the second lens element has a convex portion in a vicinity of an optical axis, and the image-side surface of the second lens element has a concave portion in a vicinity of a periphery; the object-side surface of the fourth lens element has a concave portion in a vicinity of the optical axis, and the image-side surface of the fourth lens element has a convex portion in a vicinity of the optical axis; the object-side surface of the fifth lens element has a convex portion in a vicinity of the optical axis, and the image-side surface of the fifth lens element has a concave portion in a vicinity of the optical axis; the optical imaging lens has only five lens elements having a refracting power; and the optical imaging lens satisfies the following relations:
7.508≦ALT/AG34≦13.850;3.934≦AAG/AG23≦6.028; and
2.570≦T5/AG12≦4.340, wherein ALT is a sum of thicknesses of the first to fifth lens elements, AG34 is a width of an air gap between the third and fourth lens elements along the optical axis, AAG is a sum of widths of air gaps between the first to fifth lens elements, AG23 is a width of an air gap between the second and third lens elements along the optical axis, T5 is a thickness of the fifth lens element along the optical axis, and AG12 is a width of an air gap between the first and second lens elements along the optical axis.