Patent ID: 9465195
Filing Date: 2016-10-11
CPC Classification: G02B,H04N

Claim Text:
1. An imaging lens consisting of: a first lens group; a stop; and a second lens group in this order from an object side, wherein the first lens group consists of two lenses of a negative lens having a meniscus shape with its convex surface facing the object side and a positive lens in this order from the object side, and wherein the second lens group consists of a 21st lens group and a 22nd lens group in this order from the object side, and wherein the 21st lens group consists of two lenses of a positive lens and a negative lens, and wherein the 22nd lens group consists of two lenses of a positive lens and a negative lens, and wherein the following conditional formulas (1), (3), (8) and (9) are satisfied: TL: a distance on an optical axis from a most-object-side lens surface in an entire system to an image plane when a back focus portion is a distance in air, Y: a maximum image height, Nd1p: a refractive index of the positive lens within the first lens group for d-line, and νd1p: an Abbe number of the positive lens within the first lens group for d-line.