Patent ID: 9671590
Date: 2017-06-06
CPC Classifications: G02B

Claim:
1. An imaging lens consisting of, in order from the object side to the image side: a first lens having a positive refractive power and a meniscus shape with a convex surface toward the object side; a second lens having a biconcave shape with the surface having the radius of curvature with the smaller absolute value toward the image side; a third lens having a meniscus shape with a convex surface toward the object side; a fourth lens having a negative refractive power and a meniscus shape with a convex surface toward the image side; and a fifth lens having a negative refractive power and a meniscus shape with a concave surface toward the image side, the image-side surface having at least one inflection point, wherein the conditional formula below is satisfied: where f is the focal length of the entire system, and f45 is the combined focal length of the fourth lens and the fifth lens.