US 12,461,339 B2
Optical imaging system
Ho Sik Yoo, Suwon-si (KR); Dong Shin Yang, Suwon-si (KR); Yong Joo Jo, Suwon-si (KR); and Ga Young An, 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 Aug. 27, 2021, as Appl. No. 17/459,278.
Application 17/459,278 is a continuation of application No. 16/424,540, filed on May 29, 2019, granted, now 11,249,280.
Claims priority of application No. 10-2018-0061412 (KR), filed on May 29, 2018; and application No. 10-2018-0106169 (KR), filed on Sep. 5, 2018.
Prior Publication US 2021/0389559 A1, Dec. 16, 2021
Int. Cl. G02B 9/64 (2006.01); G02B 5/00 (2006.01); G02B 13/00 (2006.01); G02B 13/18 (2006.01); G02B 27/00 (2006.01); H04N 23/55 (2023.01)
CPC G02B 9/64 (2013.01) [G02B 27/0025 (2013.01); H04N 23/55 (2023.01); G02B 5/005 (2013.01); G02B 13/0045 (2013.01); G02B 13/18 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An optical imaging system comprising:
a first lens having a positive refractive power, a convex object-side surface in a paraxial region thereof, and a concave image-side surface in a paraxial region thereof;
a second lens having a negative refractive power, a convex object-side surface in a paraxial region thereof, and a concave image-side surface in a paraxial region thereof;
a third lens having a negative refractive power, a convex object-side surface in a paraxial region thereof, and a concave image-side surface in a paraxial region thereof;
a fourth lens having a positive refractive power and a convex object-side surface in a paraxial region thereof;
a fifth lens having a negative refractive power;
a sixth lens having a refractive power and a convex object-side surface in a paraxial region thereof; and
a seventh lens having a refractive power, a concave object-side surface in a paraxial region thereof and a concave image-side surface in a paraxial region thereof,
wherein the first to seventh lenses are sequentially disposed in ascending numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system,
the optical imaging system satisfies SD12<SD34, where SD12 is a distance along the optical axis from the image-side surface of the first lens to the object-side surface of the second lens, SD34 is a distance along the optical axis from the image-side surface of the third lens to an object-side surface of the fourth lens, and SD12 and SD34 are expressed in a same unit of measurement, and
the optical imaging system further satisfies 0.05<R1/R6<0.9 and 0.2<R1/R11<1.2, where R1 is a radius of curvature on the optical axis of the object-side surface of the first lens, R6 is a radius of curvature on the optical axis of the image-side surface of the third lens, and R11 is a radius of curvature on the optical axis of the object-side surface of the sixth lens, and R1, R6, and R11 are expressed in a same unit of measurement.