US 12,292,551 B2
Compact optical imaging device with shortened focal length, imaging module, and electronic device
Hsing-Chen Liu, New Taipei (TW); Gwo-Yan Huang, New Taipei (TW); and Chia-Chih Yu, New Taipei (TW)
Assigned to HON HAI PRECISION INDUSTRY CO., LTD., New Taipei (TW)
Filed by HON HAI PRECISION INDUSTRY CO., LTD., New Taipei (TW)
Filed on Feb. 21, 2022, as Appl. No. 17/676,367.
Claims priority of application No. 202110199773.7 (CN), filed on Feb. 22, 2021.
Prior Publication US 2022/0272240 A1, Aug. 25, 2022
Int. Cl. G02B 9/60 (2006.01); G02B 3/04 (2006.01); G02B 13/00 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 3/04 (2013.01); G02B 9/60 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An optical imaging device, from an object side to an image side, comprising:
a first lens, wherein an image-side surface of the first lens is concave near an optical axis of the optical imaging device;
a second lens having a positive refractive power;
a third lens having a negative refractive power, wherein an image-side surface of the third lens is concave near the optical axis;
a fourth lens having a positive refractive power; and
a fifth lens having a positive refractive power,
wherein the optical imaging device satisfies the following formulas:

OG Complex Work Unit Math
wherein, FOV is a maximum field of view of the optical imaging device, TL5 is a distance from an object-side surface of the fifth lens to an image plane of the optical imaging device along the optical axis, FNO is a F-number of the optical imaging device, and TL4 is a distance from an object-side surface of the fourth lens to the image plane along the optical axis, the object-side surface of the fourth lens is concave near the optical axis, and an image-side surface of the fourth lens is convex near the optical axis.