US 11,740,440 B2
Optical imaging system
Il Yong Park, Suwon-si (KR); In Do Seo, 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. 19, 2022, as Appl. No. 17/578,877.
Application 17/578,877 is a continuation of application No. 16/410,026, filed on May 13, 2019, granted, now 11,262,541.
Claims priority of application No. 10-2018-0144384 (KR), filed on Nov. 21, 2018.
Prior Publication US 2022/0137375 A1, May 5, 2022
Int. Cl. G02B 3/02 (2006.01); G02B 21/02 (2006.01); G02B 15/14 (2006.01); G02B 13/04 (2006.01); G02B 9/64 (2006.01); G02B 13/00 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An optical imaging system comprising:
a first lens comprising positive refractive power;
a second lens comprising negative refractive power;
a third lens comprising positive refractive power;
a fourth lens comprising negative refractive power and a convex object-side surface;
a fifth lens comprising positive refractive power;
a sixth lens comprising a refractive power; and
a seventh lens comprising negative refractive power,
wherein the first to seventh lenses are sequentially disposed in ascending numerical order from an object side of the optical imaging system toward an imaging plane of the optical imaging system, and
−5.0<f2/f<−2.0, where f is a focal length of the optical imaging system, and f2 is a focal length of the second lens.