US 12,443,009 B2
Optical imaging system
Ji Su Lee, Suwon-si (KR); Dong Hyuk Jang, Suwon-si (KR); and Il Yong 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 Jul. 13, 2022, as Appl. No. 17/863,747.
Claims priority of application No. 10-2021-0165683 (KR), filed on Nov. 26, 2021; and application No. 10-2022-0038122 (KR), filed on Mar. 28, 2022.
Prior Publication US 2023/0168467 A1, Jun. 1, 2023
Int. Cl. G02B 9/64 (2006.01); G02B 13/18 (2006.01)
CPC G02B 9/64 (2013.01) [G02B 13/18 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An optical imaging system, comprising:
a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens disposed in order from an object side,
wherein the first lens has positive refractive power, the second lens has negative refractive power, the third lens has positive refractive power, and the fourth lens positive refractive power,
at least three of the first to eighth lenses each has a refractive index of 1.61 or more,
(TTL/(2×IMG HT))×(TTL/f)<0.64 is satisfied, where TTL is a distance from an object-side surface of the first lens to an imaging plane on an optical axis, IMG HT is half a diagonal length of the imaging plane, and f is a total focal length of the first lens to the eighth lens, and
15<v1−v4<40 is satisfied, where v1 is a first Abbe Number of the first lens, and v4 is a fourth Abbe Number of the fourth lens.