| 摘要 |
An imaging lens includes first, second, third, and fourth lens elements arranged from an object side to an image side in the given order. The first lens element has a positive refractive power. The second lens element has a negative refractive power, and concave object-side and image-side surfaces. The third lens element has a positive refractive power. The fourth lens has a curved object-side surface with a convex portion and a concave portion. The imaging lens satisfies AAG/CT3≧1.3, where AAG is a sum of distances between any adjacent two of the lens elements, and CT3 is a thickness of the third lens element. |
