Patent ID: 9658435
Date: 2017-05-23
CPC Classifications: G02B

Claim:
1. An imaging lens which forms an image of an object on a solid-state image sensor, in which elements are arranged in order from an object side to an image side, comprising: a first lens having positive refractive power and a convex surface on the object side; a second lens having negative refractive power and a concave surface on the object side; a third lens as a double-sided aspheric lens having a concave surface near the optical axis on the object side; a fourth lens as a double-sided aspheric lens having positive refractive power; a fifth lens having positive refractive power and a convex surface near an optical axis on the image side; and a sixth lens as a double-sided aspheric lens having a concave surface near the optical axis on the image side, wherein the elements are each arranged with an air gap from a neighboring element; the image-side surface of the sixth lens has a pole-change point off the optical axis; and a conditional expression (4) below is satisfied: where f1: focal length of the first lens f3: focal length of the third lens.