US 12,085,698 B2
Optical imaging system and portable electronic device including the same
Tae Youn Lee, Suwon-si (KR); Jin Hwa Jung, 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 May 9, 2023, as Appl. No. 18/314,360.
Application 18/314,360 is a continuation of application No. 17/385,224, filed on Jul. 26, 2021, granted, now 11,681,126.
Application 17/385,224 is a continuation of application No. 15/615,927, filed on Jun. 7, 2017, granted, now 11,106,010, issued on Aug. 31, 2021.
Claims priority of application No. 10-2016-0182148 (KR), filed on Dec. 29, 2016.
Prior Publication US 2023/0273410 A1, Aug. 31, 2023
Int. Cl. G02B 13/00 (2006.01); G02B 13/02 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 13/0065 (2013.01); G02B 13/02 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An optical imaging system comprising:
a first lens having a positive refractive power, a convex object-side surface in a paraxial region thereof, and a convex image-side surface in a paraxial region thereof;
a second lens having a negative refractive power;
a third lens having a positive refractive power, a convex object-side surface in a paraxial region thereof, and a concave image-side surface in a paraxial region thereof;
a fourth lens having a positive refractive power; and
a fifth lens having a negative refractive power,
wherein the first to fifth lenses are sequentially arranged 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,
0.8<TTL/ft<1.1 is satisfied, where TTL is a distance along the optical axis from the object-side surface of the first lens to the imaging plane, and ft is an overall focal length of the optical imaging system, and
1.5<ft/ft1<3.5 is satisfied, where ft1 is a focal length of the first lens.