US 12,216,334 B2
Optical imaging system
Ju Hwa Son, Suwon-si (KR); Min Hyuk Im, Suwon-si (KR); Yong Joo Jo, Suwon-si (KR); and Ga Young An, 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 Apr. 9, 2021, as Appl. No. 17/226,870.
Application 17/226,870 is a continuation of application No. 16/424,531, filed on May 29, 2019, granted, now 11,009,678.
Claims priority of application No. 10-2018-0061411 (KR), filed on May 29, 2018; and application No. 10-2018-0106172 (KR), filed on Sep. 5, 2018.
Prior Publication US 2021/0223508 A1, Jul. 22, 2021
Int. Cl. G02B 9/64 (2006.01); G02B 27/00 (2006.01); H04N 23/55 (2023.01)
CPC G02B 9/64 (2013.01) [G02B 27/0025 (2013.01); H04N 23/55 (2023.01)] 11 Claims
OG exemplary drawing
 
1. An optical imaging system comprising:
a first lens having a positive refractive power, a convex object-side surface, and a concave image-side surface;
a second lens having a negative refractive power;
a third lens having a negative refractive power and a convex object-side surface in a paraxial region thereof;
a fourth lens having a positive refractive power;
a fifth lens having a negative refractive power and a convex object-side surface in a paraxial region thereof;
a sixth lens having a refractive power; and
a seventh lens having a refractive power and a concave image-side surface,
wherein the first to seventh lenses are sequentially disposed in ascending numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system, and
wherein the optical imaging system satisfies 0.2<TD1/D67<0.8, where TD1 is a thickness along the optical axis of the first lens, D67 is a distance along the optical axis from the object-side surface of the sixth lens to the image-side surface of the seventh lens, and TD1 and D67 are expressed in a same unit of measurement.