US 12,461,338 B2
Imaging lens system
Hyuk Joo Kim, Suwon-si (KR); Kyu Min Chae, Suwon-si (KR); Seong Ho Hwang, Suwon-si (KR); and Yong Joo Jo, 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 Sep. 10, 2020, as Appl. No. 17/016,820.
Claims priority of application No. 10-2019-0168991 (KR), filed on Dec. 17, 2019.
Prior Publication US 2021/0181463 A1, Jun. 17, 2021
Int. Cl. G02B 9/62 (2006.01); G02B 13/00 (2006.01)
CPC G02B 9/62 (2013.01) [G02B 13/0045 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An imaging lens system, comprising:
a first lens having negative refractive power, a second lens having negative refractive power, a third lens having negative refractive power and a convex image-side surface, a fourth lens having positive refractive power, a fifth lens having positive refractive power and comprising a convex object-side surface in a paraxial region, and a sixth lens having negative refractive power, disposed in order from an object side toward an imaging plane,
wherein an image-side surface of the fifth lens is in contact with an object-side surface of the sixth lens,
wherein the sixth lens has a refractive index of 1.8 or greater, and has a refractive index temperature coefficient (10−6/° C.) of 3 or greater, and
wherein a thickness of the first lens along an optical axis is greater than a thickness of the fifth lens along the optical axis.