US 12,140,738 B2
Optical imaging system
Ju Hwa Son, Suwon-si (KR); In Gun Kim, Suwon-si (KR); Yong Joo Jo, Suwon-si (KR); and Ju Sung Park, 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 Nov. 29, 2023, as Appl. No. 18/522,674.
Application 18/522,674 is a continuation of application No. 17/727,099, filed on Apr. 22, 2022, granted, now 11,867,885.
Application 17/727,099 is a continuation of application No. 16/186,810, filed on Nov. 12, 2018, granted, now 11,340,429, issued on May 24, 2022.
Claims priority of application No. 10-2018-0008941 (KR), filed on Jan. 24, 2018; and application No. 10-2018-0067541 (KR), filed on Jun. 12, 2018.
Prior Publication US 2024/0094512 A1, Mar. 21, 2024
Int. Cl. G02B 13/00 (2006.01); G02B 9/64 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01)] 16 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 positive refractive power;
a fourth lens having a negative refractive power;
a fifth lens having a positive refractive power;
a sixth lens having a refractive power; and
a seventh lens having a refractive power,
wherein the first to seventh lenses are sequentially arranged in ascending numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an image side of the optical imaging system,
TTL/f<1.3, where TTL is a distance along the optical axis from the object-side surface of the first lens to an imaging plane of the optical imaging system, and f is an overall focal length of the optical imaging system, and
−0.38≤R10/f≤−0.32, where R10 is a radius of curvature of an image-side surface of the fifth lens at the optical axis, and f is the overall focal length of the optical imaging system.