Patent ID: 8379328

Claim:
An imaging lens consisting of, in order from the object side to the image side: a first lens having positive refractive power with a diffractive optical element provided on a surface facing an image side; a second lens having a meniscus shape with positive refractive power and a convex surface facing an image side; and a third lens having negative refractive power, wherein the imaging lens satisfies all of the following conditional expressions (1) to (4): 0.9 <f 1 /f< 1.3 (1) 0.7 <f 2 /f< 1.1 (2) −0.8 <f 3 /f− 0.6 (3) −0.3 <f·φ DOE <0.5 (4) where f denotes a focal length of the imaging lens, f1 denotes a focal length of the first lens, f2 denotes a focal length of the second lens, f3 denotes a focal length of the third lens and φ DOE denotes refractive power of the diffractive optical element.