US 12,072,553 B2
Optical imaging system
Joon Hee Byun, Suwon-si (KR); Ho Sik Yoo, 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 Apr. 19, 2023, as Appl. No. 18/136,442.
Application 18/136,442 is a continuation of application No. 17/005,500, filed on Aug. 28, 2020, granted, now 11,662,552.
Claims priority of application No. 10-2019-0107775 (KR), filed on Aug. 30, 2019.
Prior Publication US 2023/0251461 A1, Aug. 10, 2023
Int. Cl. G02B 9/60 (2006.01); G02B 13/00 (2006.01); G02B 13/02 (2006.01); G02B 27/00 (2006.01); H04N 23/55 (2023.01)
CPC G02B 9/60 (2013.01) [G02B 13/0045 (2013.01); G02B 13/02 (2013.01); G02B 27/0025 (2013.01); H04N 23/55 (2023.01)] 13 Claims
OG exemplary drawing
 
1. An optical imaging system, comprising:
a first lens having positive refractive power, a convex object-side surface and a convex image-side surface;
a second lens having negative refractive power and a concave object-side surface;
a third lens having positive refractive power;
a fourth lens having refractive power; and
a fifth lens having refractive power,
wherein the first to fifth lenses are arranged in order from an object side towards an image side,
wherein the optical imaging system has a total of five lenses, and
wherein the following conditional expressions are satisfied:
0.87<TTL/f<1.31;
−0.7 mm<f1+f2<1.3 mm, and
4.5<TTL/IMG HT<6.5,
where TTL is a distance on the optical axis from the object-side surface of the first lens to an imaging surface, f is a total focal length of the optical imaging system, f1 is a focal length of the first lens, f2 is a focal length of the second lens, and IMG HT is half a diagonal length of the imaging surface.