US 12,078,787 B2
Optical image lens assembly and electronic device
Kuan-Ting Yeh, Taichung (TW); and Hsin-Hsuan Huang, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Mar. 18, 2021, as Appl. No. 17/206,078.
Claims priority of application No. 109143932 (TW), filed on Dec. 11, 2020.
Prior Publication US 2022/0187578 A1, Jun. 16, 2022
Int. Cl. G02B 13/00 (2006.01); G02B 9/60 (2006.01); G03B 17/17 (2021.01)
CPC G02B 13/0065 (2013.01) [G02B 9/60 (2013.01); G02B 13/0045 (2013.01); G03B 17/17 (2013.01)] 30 Claims
OG exemplary drawing
 
1. An optical image lens assembly comprising five lens elements, the five lens elements being, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element, and each of the five lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;
wherein the first lens element has positive refractive power, the object-side surface of the first lens element is convex in a paraxial region thereof, the second lens element has positive refractive power, the third lens element has negative refractive power, the image-side surface of the third lens element is concave in a paraxial region thereof, the object-side surface of the fourth lens element is concave in a paraxial region thereof, and the image-side surface of the fourth lens element is convex in a paraxial region thereof; and
wherein a distance along an optical axis between the image-side surface of the fifth lens element and an image surface is BL, a distance along the optical axis between the object-side surface of the first lens element and the image-side surface of the fifth lens element is TD, an Abbe number of the fifth lens element is V5, a focal length of the optical image lens assembly is f, a focal length of the first lens element is f1, a focal length of the second lens element is f2, and the following conditions are satisfied:
0.85<BL/TD<5.0;
8.0<V5<28.0;
0.50<f/f1<2.50; and
0.42≤f/f2<1.85.