US 12,366,722 B2
Telescopic optical imaging system
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 Jun. 16, 2023, as Appl. No. 18/336,295.
Application 18/336,295 is a continuation of application No. 17/137,502, filed on Dec. 30, 2020, granted, now 11,719,910.
Application 17/137,502 is a continuation of application No. 16/129,888, filed on Sep. 13, 2018, granted, now 10,908,389, issued on Feb. 2, 2021.
Claims priority of application No. 10-2017-0148960 (KR), filed on Nov. 9, 2017; and application No. 10-2018-0007785 (KR), filed on Jan. 22, 2018.
Prior Publication US 2023/0324652 A1, Oct. 12, 2023
Int. Cl. G02B 9/62 (2006.01); G02B 7/02 (2021.01); G02B 13/00 (2006.01); G02B 27/00 (2006.01)
CPC G02B 9/62 (2013.01) [G02B 7/021 (2013.01); G02B 13/0045 (2013.01); G02B 27/0037 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An optical imaging system, comprising:
a first lens having a refractive power;
a second lens having a concave image-side surface;
a third lens having a refractive power;
a fourth lens having a positive refractive power;
a fifth lens having a refractive power; and
a sixth lens having a refractive power,
wherein the first to sixth lenses are sequentially disposed from an object side toward an imaging plane,
wherein a radius of curvature of an object-side surface of the fourth lens is greater than a radius of curvature of an image-side surface of the first lens, and
wherein 0.7<TL/f<1.0,
where TL is a distance from an object-side surface of the first lens to the imaging plane and f is an overall focal length of the optical imaging system.