US 12,189,092 B2
Optical imaging system including six lenses of +−−−++, or seven lenses of −−+−++−, +−+−−+ +, −++−+−− or −++−++− refractive powers
Ju Hwa Son, Suwon-si (KR); Hyo Jin Hwang, Suwon-si (KR); Yong Joo Jo, Suwon-si (KR); Sang Hyun Jang, Suwon-si (KR); and Jong Gi Lee, 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. 5, 2022, as Appl. No. 18/074,881.
Application 18/074,881 is a continuation of application No. 17/005,918, filed on Aug. 28, 2020, granted, now 11,803,034.
Claims priority of application No. 10-2019-0107776 (KR), filed on Aug. 30, 2019.
Prior Publication US 2023/0108823 A1, Apr. 6, 2023
Int. Cl. G02B 13/00 (2006.01); G02B 9/64 (2006.01); G02B 13/02 (2006.01); H04N 23/55 (2023.01)
CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01); G02B 13/0065 (2013.01); G02B 13/009 (2013.01); G02B 13/02 (2013.01); H04N 23/55 (2023.01)] 20 Claims
OG exemplary drawing
 
1. An optical imaging system, comprising:
a first lens group comprising a plurality of lenses and having negative refractive power;
a second lens group comprising a plurality of lenses and having positive refractive power; and
a third lens group comprising a plurality of lenses and having negative refractive power,
wherein the first to third lens groups are arranged in order from an object side,
wherein at least one of the first lens group to the third lens group is moved on an optical axis to change a distance between the first lens group to the third lens group,
wherein among the plurality of lenses in the first lens group, a lens disposed closest to the object side has a convex object-side surface,
wherein among the plurality of lenses in the first lens group, a lens disposed closest to the second lens group has a concave image-side surface,
wherein among the plurality of lenses in the second lens group, a lens disposed closest to the first lens group has a convex object-side surface and a convex image-side surface,
wherein among the plurality of lenses in the second lens group, a lens disposed closest to the third lens group has a concave image-side surface,
wherein the optical imaging system consists of seven lenses, and
wherein among the plurality of lenses in the third lens group, a lens disposed closer to the second lens group has a positive refractive power, and a lens disposed closer to an image side has a negative refractive power.