US 11,885,942 B2
Optical imaging system
Hag Chul Kim, Suwon-si (KR); Hyuk Joo Kim, Suwon-si (KR); and Kyu Min Chae, 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 Aug. 17, 2022, as Appl. No. 17/889,696.
Application 17/889,696 is a continuation of application No. 16/108,599, filed on Aug. 22, 2018, granted, now 11,448,857.
Claims priority of application No. 10-2017-0155623 (KR), filed on Nov. 21, 2017.
Prior Publication US 2022/0390721 A1, Dec. 8, 2022
Int. Cl. G02B 13/00 (2006.01); G02B 1/00 (2006.01); G02B 1/04 (2006.01); G02B 27/00 (2006.01); H04N 5/225 (2006.01); G02B 13/04 (2006.01); G02B 13/16 (2006.01); H04N 23/55 (2023.01)
CPC G02B 13/0045 (2013.01) [G02B 1/007 (2013.01); G02B 1/041 (2013.01); G02B 13/04 (2013.01); G02B 13/16 (2013.01); G02B 27/0025 (2013.01); H04N 23/55 (2023.01)] 18 Claims
OG exemplary drawing
 
1. An optical imaging system comprising:
a first lens comprising negative refractive power, and comprising a convex object-side surface;
a second lens comprising negative refractive power;
a third lens comprising positive refractive power, and comprising a concave object-side surface and a convex image-side surface;
a fourth lens comprising positive refractive power, and comprising a convex object-side surface and a convex image-side surface;
a fifth lens comprising positive refractive power, and comprising a convex object-side surface and a convex image-side surface;
a sixth lens comprising negative refractive power, and comprising a concave object-side surface and a concave image-side surface; and
a seventh lens comprising positive refractive power,
wherein the optical imaging system comprises a total of seven lenses and the first to seventh lenses are sequentially disposed from an object side toward an image side such that the fifth lens is spaced apart from the fourth lens at an optical axis,
wherein R5 is a radius of curvature of the object-side surface of the third lens, f is an overall focal length of the optical imaging system, and −15.0<R5/f<−5.0, and
wherein f3 is a focal length of the third lens, and 0.02<f/f3<0.08.