US 12,000,993 B2
Optical imaging system
Jung Hui Ko, 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 Dec. 23, 2022, as Appl. No. 18/088,145.
Application 18/088,145 is a continuation of application No. 17/094,875, filed on Nov. 11, 2020, granted, now 11,567,302.
Application 17/094,875 is a continuation of application No. 16/139,235, filed on Sep. 24, 2018, granted, now 10,866,393, issued on Dec. 15, 2020.
Application 16/139,235 is a continuation of application No. 15/478,884, filed on Apr. 4, 2017, granted, now 10,114,199, issued on Oct. 30, 2018.
Claims priority of application No. 10-2016-0158181 (KR), filed on Nov. 25, 2016.
Prior Publication US 2023/0125291 A1, Apr. 27, 2023
Int. Cl. G02B 9/00 (2006.01); G02B 9/62 (2006.01); G02B 13/00 (2006.01); G02B 27/00 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/00 (2013.01); G02B 9/62 (2013.01); G02B 13/00 (2013.01); G02B 13/002 (2013.01); G02B 27/0025 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An optical imaging system comprising:
a first lens comprising positive refractive power, a convex object-side surface and a concave image-side surface;
a second lens comprising negative refractive power, a convex object-side surface and a concave image-side surface;
a third lens comprising positive refractive power;
a fourth lens comprising negative refractive power;
a fifth lens comprising refractive power; and
a sixth lens comprising negative refractive power,
wherein the first to sixth lenses are sequentially arranged from an object side to an image side,
wherein the first to sixth lenses are formed of plastic material,
wherein the optical imaging system has a total of six lenses,
wherein f/(CT3+CT4+CT5)<4.0 is satisfied, where f is an overall focal length of the optical imaging system, CT3 is a thickness of the third lens in a paraxial region, CT4 is a thickness of the fourth lens in the paraxial region, and CT5 is a thickness of the fifth lens in the paraxial region, and
wherein the second lens has the greatest refractive index among the first to sixth lenses and the second lens has a refractive index greater than 1.66.