IMAGING LENS

摘要

PROBLEM TO BE SOLVED: To provide a downsized imaging lens that meets the needs of a low height, small F-value and wide-angle of an imaging lens, and has excellently corrected various aberrations and high resolution.SOLUTION: The imaging lens comprises; in order from an object side, a positive first lens with a convex surface directed toward the object side; a negative second lens with the convex surface directed toward the object side; a third lens; a positive fourth lens; and a negative fifth lens with a concave surface directed toward an image side and both surfaces being aspherical surfaces. When Fno denotes a F number, ih denotes a maximum image height, TTL denotes an optical entire length, f45 denotes a composite focal length of the fourth lens and fifth lens, r5 and r6 denote radii of curvature of respective surfaces on the object side and on the image side of the third lens, r7 and r8 denote radii of curvature of respective surfaces on the object side and on the image side of the fourth lens, and r9 and r10 denote radii of curvature of respective surfaces on the object side and on the image side of the fifth lens, the imaging lens satisfies a condition of Fno≤2.4, TTL/2ih<0.9, f45<0, 0