US 12,345,953 B2
Optical imaging system
Ju Hwa Son, Suwon-si (KR); Min Hyuk Im, Suwon-si (KR); Ga Young An, 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 Apr. 18, 2024, as Appl. No. 18/638,928.
Application 18/638,928 is a continuation of application No. 18/305,425, filed on Apr. 24, 2023, granted, now 11,994,749.
Application 18/305,425 is a continuation of application No. 17/726,717, filed on Apr. 22, 2022, granted, now 11,668,905, issued on Jun. 6, 2023.
Application 17/726,717 is a continuation of application No. 16/438,974, filed on Jun. 12, 2019, granted, now 11,340,424, issued on May 24, 2022.
Claims priority of application No. 10-2018-0073614 (KR), filed on Jun. 26, 2018; and application No. 10-2019-0011429 (KR), filed on Jan. 29, 2019.
Prior Publication US 2024/0264408 A1, Aug. 8, 2024
Int. Cl. G02B 9/64 (2006.01); G02B 7/02 (2021.01); G02B 27/00 (2006.01)
CPC G02B 9/64 (2013.01) [G02B 7/02 (2013.01); G02B 27/0025 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An optical imaging system, comprising:
a first lens having a refractive power;
a second lens having negative refractive power;
a third lens having a refractive power;
a fourth lens having a refractive power;
a fifth lens having a refractive power;
a sixth lens having a refractive power;
a seventh lens having a refractive power; and
an eighth lens having a refractive power,
wherein the optical imaging system includes a total of eight lenses with refractive power and the first to eighth lenses are sequentially disposed in 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,
wherein a radius of curvature of an object-side surface of the third lens is greater than a radius of curvature of an image-side surface of the second lens,
wherein a radius of curvature of an image-side surface of the fourth lens is greater than a radius of curvature of an image-side surface of the fifth lens,
wherein 2.0<|R15/R16|<5.0, where R15 is a radius of curvature of an object-side surface of the eighth lens and R16 is a radius of curvature of an image-side surface of the eighth lens, and
wherein LT4<LT5, where LT4 is a thickness of the fourth lens along the optical axis and LT5 is a thickness of the fifth lens along the optical axis.