US 12,066,605 B2
Optical system and camera module comprising optical system
Hyung Rok Shim, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Appl. No. 17/420,616
Filed by LG INNOTEK CO., LTD., Seoul (KR)
PCT Filed Jan. 2, 2020, PCT No. PCT/KR2020/000053
§ 371(c)(1), (2) Date Jul. 2, 2021,
PCT Pub. No. WO2020/141902, PCT Pub. Date Jul. 9, 2020.
Claims priority of application No. 10-2019-0001217 (KR), filed on Jan. 4, 2019; and application No. 10-2019-0025331 (KR), filed on Mar. 5, 2019.
Prior Publication US 2022/0113491 A1, Apr. 14, 2022
Int. Cl. G02B 15/14 (2006.01)
CPC G02B 15/143 (2019.08) 19 Claims
OG exemplary drawing
 
1. A zoom optical system comprising a first lens group, a second lens group, and a third lens group which are sequentially arranged from an object side to an image side, wherein:
the first lens group consists of three fixed lenses;
the second lens group consists of two movable lenses;
the third lens group consists of two movable lenses;
a magnification is adjusted according to movement of the second lens group;
a focus is adjusted according to movement of the third lens group;
a focal length at a maximum magnification is 13 mm or more; and
a f-number at the maximum magnification is 3.7 or less.