US 11,927,730 B2
Optical imaging system
Hag Chul Kim, Suwon-si (KR); Yong Joo Jo, Suwon-si (KR); and Hwan Soo Park, 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 Nov. 18, 2022, as Appl. No. 17/990,121.
Application 17/990,121 is a continuation of application No. 17/074,895, filed on Oct. 20, 2020, granted, now 11,531,192.
Application 17/074,895 is a continuation of application No. 16/108,506, filed on Aug. 22, 2018, granted, now 10,845,575, issued on Nov. 24, 2020.
Claims priority of application No. 10-2017-0167715 (KR), filed on Dec. 7, 2017.
Prior Publication US 2023/0092924 A1, Mar. 23, 2023
Int. Cl. G02B 13/00 (2006.01); G02B 1/00 (2006.01); G02B 1/04 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 1/007 (2013.01); G02B 1/041 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An optical imaging system comprising:
a first lens comprising negative refractive power;
a second lens comprising refractive power;
a third lens comprising positive refractive power, a convex object-side surface and a convex image-side surface;
a fourth lens comprising negative refractive power;
a fifth lens comprising refractive power;
a sixth lens comprising refractive power; and
a seventh lens comprising negative refractive power,
wherein the first to seventh lenses are sequentially disposed from an object side toward an image side,
wherein n3<1.64 is satisfied, where n3 is a refractive index of the third lens,
wherein TTL/(2*IMGH)<3.0 is satisfied, where TTL is a distance from an object-side surface of the first lens to an imaging plane of an image sensor, and IMGH is a half of a diagonal length of the imaging plane of the image sensor, and
wherein 0.02<f/f3<0.65 is satisfied, where f3 is a focal length of the third lens, and f is an overall focal length of the optical imaging system.