US Patent 10942338 Imaging lens

There is provided an imaging lens with high-resolution which satisfies the wide field of view, the low-profileness and the low F-number in well balance, and excellently corrects aberrations. An imaging lens comprises in order from an object side to an image side, a first lens having negative refractive power, an aperture stop, a second lens, a third lens being a double-aspheric lens, a fourth lens having positive refractive power, and a fifth lens being a double-sided aspheric lens, wherein a below expression is satisfied:−0.07<(N1−1)/(r1×f)×1000<0.07whereN1: refractive index at d-ray of the first lens,r1: curvature radius of the object-side surface of the first lens,f: focal length of the overall optical system.