Imaging lens

An imaging lens which forms an image of an object on a solid-state image sensor, comprising exactly six lenses arranged, in the following order from an object side to an image side:

• a first lens with positive refractive power as a meniscus lens having a convex surface on the object side;
• a second lens with refractive power having a concave surface on the image side;
• a third lens with positive refractive power as a meniscus lens having a concave surface on the image side;
• a fourth lens with refractive power having a convex surface on the object side;
• a fifth lens that is a double-sided aspheric lens having a convex surface on the image side;
• and
• a sixth lens that is a double-sided aspheric lens with negative refractive power having a concave surface on the object side,
• wherein conditional expressions (1) and (2) below are satisfied:
• 0.18<AG16/Σd<0.3 (1)
• 20<vd3−vd4<40 (2)
• where
• AG16:
• sum of air gaps on an optical axis from the first lens to the sixth lens
• Σd:
• distance on the optical axis from the object-side surface of the first lens to the image-side surface of the sixth lens
• vd3:
• Abbe number of the third lens at d-ray
• vd4:
• Abbe number of the fourth lens at d-ray.