Patent ID: 9075222
Filing Date: 2015-07-07
Classification: G02B,H04N

Abstract:
1. An imaging lens substantially 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 substantially consists of three or less lenses including at least one negative lens and a positive lens, and wherein the second lens group substantially consists of a 21st lens group and a 22nd lens group in this order from the object side, and wherein the 21st lens group substantially consists of three or less lenses and has positive refractive power, and wherein the 22nd lens group substantially consists of two lenses of a negative lens and a positive lens in this order from the object side, and wherein the following conditional formulas (1), (2), (3) and (5) 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, Σd: a distance on the optical axis from a most-object-side lens surface in the first lens group to a most-image-side lens surface in the second lens group, f: a focal length of the entire system, and f1: a focal length of the first lens group.