| 摘要 |
<p>Provided are an imaging lens that is more compact than conventional types, has excellent correction of various aberrations, has a lens speed of f/2.4 or faster, and has a six-lens structure, and an imaging device that uses the same and a mobile terminal. An imaging lens for forming a subject image on a photoelectric conversion unit of a solid-state imaging device has a lens speed of f/2.4 or faster and comprises, in order from the object side: a first lens having a positive refractive power, a convex surface facing the object side in the vicinity of the optical axis, and a greater curvature on the object side than on the image side; a second lens having a negative refractive power; a third lens having a positive refractive power; a fourth lens; a fifth lens; and a sixth lens having a negative refractive power and a concave surface facing the image side in the vicinity of the optical axis. The image-side surface of the sixth lens is aspherical and has an extreme value at a position other than the point where the surface intersects with the optical axis. The aperture stop of the imaging lens is located further to the object side than the image-side surface of the second lens, and the imaging lens satisfies the following conditional expressions. 40.0 <ν3 < 65.0 (1) 0.05 < d8/f < 0.15 (2) Whereν3 is the Abbe number of the third lens, d8 is the air space (mm) along the optical axis between the fourth lens and the fifth lens, and f is the overall focal length (mm) of the imaging lens.</p> |
