Imaging lens and electronic apparatus having the same

An optical imaging lens comprising, sequentially from an object side to an image side along an optical axis, a first, a second, a third, a fourth and a fifth lens element, 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 object-side surface of the first lens element comprises a convex portion in a vicinity of the optical axis, and the image-side surface of the first lens element comprises a convex portion in a vicinity of its periphery;
• the image-side surface of the second lens element comprises a concave portion in a vicinity of the optical axis;
• the third lens element has a negative refractive power;
• the fourth lens element has a positive refractive power;
• the object-side surface of the fifth lens element comprises a convex portion in a vicinity of its periphery;
• and
• the optical imaging lens as a whole has only the five lens elements having refractive power,
• wherein a distance between the object-side surface of the first lens element and an image plane along the optical axis is TTL, a central thickness of the first lens element along the optical axis is T1, a central thickness of the third lens element along the optical axis is T3, and TTL, T1 and T3 satisfy the relation:
• 4.67≤TTL/(T1+T3)≤5.20.