Patent ID: 9658433
Date: 2017-05-23
CPC Classifications: G02B

Claim:
1. An imaging lens consisting essentially of, in order from an object side, five lenses of: a first lens that has a biconvex shape; a second lens that has a negative refractive power and concave toward the object side; a third lens; a fourth lens that has a positive refractive power; and a fifth lens that has a negative refractive power and has an object side surface and an image side surface which have aspheric shapes, wherein the fifth lens has a meniscus shape which is convex toward the object side, wherein the following conditional expressions (1), (2) and (4-1) are satisfied: f is a focal length of a whole system, f45 is a composite focal length of the fourth and fifth lenses, f4 is a focal length of the fourth lens, and f3 is a focal length of the third lens.