US 12,013,516 B2
Optical imaging system
Jae Hyun Baik, Suwon-si (KR); Yong Joo Jo, Suwon-si (KR); Tae Youn Lee, Suwon-si (KR); and Jae Hyuk Huh, 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 Oct. 11, 2022, as Appl. No. 17/963,249.
Application 17/963,249 is a continuation of application No. 16/136,473, filed on Sep. 20, 2018, granted, now 11,500,182.
Claims priority of application No. 10-2018-0008289 (KR), filed on Jan. 23, 2018.
Prior Publication US 2023/0050751 A1, Feb. 16, 2023
Int. Cl. G02B 13/00 (2006.01); G02B 9/60 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/60 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An optical imaging system comprising:
a first lens having negative refractive power and a concave image-side surface;
a second lens having a convex object-side surface;
a third lens having a refractive power;
a fourth lens having a refractive power; and
a fifth lens having negative refractive power and a convex object-side surface,
wherein the first to fifth lenses are sequentially disposed in numerical order from an object side of the optical imaging system toward an imaging plane,
wherein the optical imaging system has a total number of five lenses with refractive power,
wherein the optical imaging system has an overall focal length in a range of 1.0 mm to 1.8 mm,
wherein an F number of the optical imaging system is less than 2.3,
wherein a radius of curvature of an object-side surface of the second lens is greater than a radius of curvature of an object-side surface of the third lens,
wherein a radius of curvature of an object-side surface of the third lens is greater than a radius of curvature of an image-side surface of the third lens,
wherein a thickness of the second lens is greater than a thickness of the first lens,
wherein the first lens has a focal length in a range of −5.0 mm to −2.5 mm,
wherein the third lens has a focal length in a range of −50 mm to −6.0 mm, and
wherein a distance from an image-side surface of the third lens to an object-side surface of the fourth lens is greater than a distance from an image-side surface of the fourth lens to an object-side surface of the fifth lens.