US 12,066,599 B2
Imaging lens system
Min Hyuk Im, Suwon-si (KR); and Ju Hwa Son, Suwon-si (KR)
Assigned to Samsung Electro-Mechanics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electro-Mechanics Co., Ltd., Suwon-si (KR)
Filed on Jan. 21, 2020, as Appl. No. 16/747,735.
Claims priority of application No. 10-2019-0015653 (KR), filed on Feb. 11, 2019.
Prior Publication US 2020/0257086 A1, Aug. 13, 2020
Int. Cl. G02B 13/04 (2006.01); G02B 9/64 (2006.01); G02B 13/00 (2006.01); H04N 23/55 (2023.01); G02B 7/02 (2021.01); G02B 13/18 (2006.01); G03B 17/12 (2021.01)
CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01); H04N 23/55 (2023.01); G02B 7/021 (2013.01); G02B 13/18 (2013.01); G03B 17/12 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An imaging lens system, comprising:
a total of seven lenses with refractive power,
wherein the seven lenses comprise a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially disposed in ascending numerical order along an optical axis from an object side of the imaging lens system toward an imaging plane of the imaging lens system,
wherein the first lens has a positive refractive power,
wherein the fourth lens has a convex image-side surface in a paraxial region thereof or the fifth lens has a convex object-side surface in a paraxial region thereof,
wherein the seventh lens has a convex object-side surface and a convex image-side surface in a paraxial region thereof,
wherein TTL/f<1.0, D23/D34<1.2, and a thickness of the second lens >D23, where TTL is a distance along the optical axis from an object-side surface of the first lens to the imaging plane, f is a focal length of the imaging lens system, D23 is a distance along the optical axis from an image-side surface of the second lens to an object-side surface of the third lens, D34 is a distance along the optical axis from an image-side surface of the third lens to an object-side surface of the fourth lens, and thickness of the second lens is a distance along the optical axis from an object-side surface of the second lens to the image-side surface of the second lens, and
wherein a radius of curvature of the object-side surface of the second lens is greater than a radius of curvature of an image-side surface of the sixth lens.