| 摘要 |
PROBLEM TO BE SOLVED: To provide a 5-component small-sized imaging lens which has sufficient brightness of about an F2 and has various aberrations satisfactorily corrected.SOLUTION: An imaging lens comprises, in order from an object side: a first lens L1 having positive refracting power and a convex surface facing the object side: a second lens L2 having negative refracting power and a concave surface facing the image side; a third lens L3 having positive or negative refracting power; a fourth lens L4 having positive refracting power and a convex surface facing the image side; and a fifth lens L5 having negative refracting power and a concave surface facing the image side. A surface on the image side of the fifth lens has a non-spherical shape and has an inflection point in a position other than a point crossing an optical axis. |
