Patent ID: 9709775
Date: 2017-07-18
CPC Classifications: G02B

Claim:
1. An imaging lens consisting of six lenses, including, in order from the object side to the image side: a first lens having a positive refractive power and a convex surface toward the object side; a second lens having a negative refractive power; a third lens, which is a meniscus lens having a positive refractive power and a convex surface toward the object side; a fourth lens having a positive refractive power; a fifth lens having a negative refractive power and a concave surface toward the object side; and a sixth lens having a negative refractive power, of which the surface toward the image side is of an aspherical shape which is concave in the vicinity of the optical axis and convex at the peripheral portion thereof; the conditional formulae below being satisfied: wherein f is the focal length of the entire lens system, f1 is the focal length of the first lens, and f4 is the focal length of the fourth lens.