US 11,726,301 B2
Lens assembly and electronic device including the same
Hyunjea Kim, Gyeonggi-do (KR); Changkeun Kim, Gyeonggi-do (KR); Hyunho Kim, Gyeonggi-do (KR); Jaecheol Bae, Gyeonggi-do (KR); and Kyeongeun Lee, Gyeonggi-do (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed on Oct. 8, 2020, as Appl. No. 17/65,650.
Claims priority of application No. 10-2019-0140826 (KR), filed on Nov. 6, 2019.
Prior Publication US 2021/0132342 A1, May 6, 2021
Int. Cl. G02B 3/02 (2006.01); G02B 13/18 (2006.01); G02B 13/00 (2006.01); G02B 9/62 (2006.01); G02B 5/00 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 5/005 (2013.01); G02B 9/62 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A lens assembly, comprising:
an aperture stop and at least three lenses sequentially arranged from a side of an object to a side of an image sensor along an optical axis,
wherein a first lens disposed on the side of the object among the at least three lenses is disposed closer to the image sensor than the aperture stop, the first lens including a convex surface on the side of the object and a concave surface on the side of the image sensor, and the first lens having positive refractive power,
wherein a second lens among the at least three lenses is disposed closer to the image sensor than the first lens, the second lens including a convex surface on the side of the object and a concave surface on the side of the image sensor, and the second lens having negative refractive power,
wherein a third lens among the at least three lenses is disposed closer to the image sensor than the second lens and has positive or negative refractive power,
wherein the lens assembly meets Equation 1:
0.1=<CT15/StopL=<0.4  Equation 1,
wherein “CT15” denotes a distance between the object-side convex surface of the first lens and an object-side convex surface of the third lens measured along the optical axis, and “StopL” denotes a distance between an image forming surface of the image sensor and the aperture stop measured along the optical axis,
wherein the lens assembly further comprises a barrel structure disposed between the aperture stop and the first lens,
wherein an inner wall of the barrel structure is formed to be inclined so that an inner diameter of the barrel structure gradually increases towards the first lens and includes a first section, which extends from the aperture stop to the first lens and has a first angle of inclination from the aperture stop, and a second section, which extends from an end of the first section to the first lens and has a second angle of inclination from the aperture stop,
wherein the lens assembly meets Equation 2:
1.0=<Da/Db=<3.0  Equation 2
wherein “Da” denotes the first angle of inclination, and “Db” denotes the second angle of inclination.