US 12,443,007 B2
Imaging lens and imaging apparatus
Ryosuke Nagami, Saitama (JP); and Hiroki Saito, Saitama (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Jun. 17, 2022, as Appl. No. 17/843,233.
Claims priority of application No. 2021-102745 (JP), filed on Jun. 21, 2021; and application No. 2022-085577 (JP), filed on May 25, 2022.
Prior Publication US 2023/0003968 A1, Jan. 5, 2023
Int. Cl. G02B 9/04 (2006.01); G02B 13/18 (2006.01)
CPC G02B 9/04 (2013.01) [G02B 13/18 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An imaging lens consisting of, in order from an object side to an image side: a front group; a stop; and a rear group that has a positive refractive power,
wherein assuming that
a height of a principal ray with a maximum image height from an optical axis in a plane which is perpendicular to the optical axis and which passes through an intersection between the optical axis and a lens surface closest to the object side in a state in which an infinite distance object is in focus is H,
a focal length of the imaging lens in a state in which the infinite distance object is in focus is f,
a sum of a back focal length in terms of air conversion distance and a distance on the optical axis from the lens surface closest to the object side to a lens surface closest to the image side in a state in which the infinite distance object is in focus is TL,
a maximum half angle of view of the imaging lens is tom, and
a unit of tom is degree,
Conditional Expressions (1), (2), and (3) are satisfied, which are represented by
1<H/(f×tan ωm)<1.8  (1),
3.1<TL/(f×tan ωm)<5.2  (2), and
52<ωm<74  (3).