US 12,443,015 B2
Imaging lens system having seven lenses of +-+−- +- or +-+-++- refractive powers
Kil Soo Shin, 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 Jan. 12, 2024, as Appl. No. 18/411,843.
Application 18/411,843 is a continuation of application No. 17/578,775, filed on Jan. 19, 2022, granted, now 11,906,707.
Application 17/578,775 is a continuation of application No. 16/589,805, filed on Oct. 1, 2019, granted, now 11,256,068, issued on Feb. 22, 2022.
Claims priority of application No. 10-2019-0071406 (KR), filed on Jun. 17, 2019.
Prior Publication US 2024/0159992 A1, May 16, 2024
Int. Cl. G02B 13/00 (2006.01); G02B 9/64 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An imaging lens system comprising:
a first lens comprising a refractive power;
a second lens comprising a negative refractive power;
a third lens comprising a refractive power;
a fourth lens comprising a refractive power;
a fifth lens comprising a refractive power and a convex object-side surface in a paraxial region;
a sixth lens comprising a refractive power; and
a seventh lens comprising a refractive power,
wherein the imaging lens system includes a total number of seven lenses with refractive power and the first to seventh lenses are sequentially disposed from an object side toward an imaging plane,
wherein a radius of curvature of an object-side surface of the third lens is greater than a radius of curvature of an image-side surface of the first lens,
wherein TTL/2HI<0.730, where TTL is a distance from an object-side surface of the first lens to the imaging plane and 2HI is a diagonal length of the imaging plane, and
wherein 30<V5<50, where V5 is an Abbe number of the fifth lens.