主权项 |
1. An imaging lens comprising first, second, third, fourth, and fifth lens elements arranged in order from an object side to an imaging side, each of the first, second, third, fourth, and fifth lens elements having an object-side surface facing toward the object side, and an imaging-side surface facing toward the imaging side, wherein the imaging lens satisfies the following conditions:
20<vd1−vd2; 0<|vd3−vd2|≦5; 20<vd4−vd3; and 0≦|vd4−vd5|≦5, wherein vd1, vd2, vd3, vd4, and vd5 are Abbe numbers of the respective first, second, third, fourth, and fifth lens elements, |vd3−vd2| is the absolute value of the difference between vd2 and vd3, and |vd4−vd5| is the absolute value of the difference between vd4 and vd5. |