Imaging lens and electronic apparatus including the same

An imaging lens comprising an aperture stop, a first lens element, a second lens element, a third lens element and a fourth lens element arranged in order from an object side to an image side along an optical axis of said imaging lens, each of said first lens element, said second lens element, said third lens element and said fourth lens element having an object-side surface facing toward the object side, and an image-side surface facing toward the image side, wherein:

• said image-side surface of said first lens element has a convex portion in a vicinity of the optical axis;
• said object-side surface of said second lens element has a convex portion in a vicinity of the optical axis, and said image-side surface of said second lens element has a convex portion in a vicinity of a periphery of said second lens element;
• said image-side surface of said third lens element has a concave portion in a vicinity of a periphery of said third lens element;
• said object-side surface of said fourth lens element has a concave portion in a vicinity of a periphery of said fourth lens element, and said image-side surface of said fourth lens element has a concave portion in a vicinity of the optical axis and a convex portion in a vicinity of the periphery of said fourth lens element;
• said imaging lens does not include any lens element with refractive power other than said first lens element, said second lens element, said third lens element and said fourth lens element;
• and
• said imaging lens satisfies 3.00≦G23/G34≦8.00 and T3/T1≦1.20, where G23 represents an air gap length between said second lens element and said third lens element at the optical axis, G34 represents an air gap length between said third lens element and said fourth lens element at the optical axis, T1 represents a thickness of said first lens element at the optical axis, and T3 represents a thickness of said third lens element at the optical axis.