US 12,019,212 B2
Optical imaging lens
Hung-Chien Hsieh, Taichung (TW); Qingzhi Zhu, Fujian (CN); and Fensha Cai, Fujian (CN)
Assigned to Genius Electronic Optical (Xiamen) Co., Ltd., Fujian (CN)
Filed by Genius Electronic Optical (Xiamen) Co., Ltd., Fujian (CN)
Filed on Oct. 6, 2022, as Appl. No. 17/960,829.
Application 17/960,829 is a continuation of application No. 16/798,438, filed on Feb. 24, 2020, granted, now 11,500,181.
Application 16/798,438 is a continuation of application No. 15/997,703, filed on Jun. 5, 2018, granted, now 10,613,296, issued on Apr. 7, 2020.
Claims priority of application No. 201810222728.7 (CN), filed on Mar. 19, 2018.
Prior Publication US 2023/0087037 A1, Mar. 23, 2023
Int. Cl. G02B 13/00 (2006.01); G02B 9/58 (2006.01); G02B 27/00 (2006.01)
CPC G02B 13/004 (2013.01) [G02B 9/58 (2013.01); G02B 27/0037 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical imaging lens, from an object side to an image side in order along an optical axis comprising: a first lens element, a second lens element, a third lens element and a fourth lens element, the first lens element to the fourth lens element each has an object-side surface facing toward the object side to allow imaging rays to pass through as well as an image-side surface facing toward the image side to allow the imaging rays to pass through, wherein:
an optical-axis region of the object-side surface of the second lens element is convex, an optical-axis region of the image-side surface of the second lens element is concave and a periphery region of the image-side surface of the second lens element is convex;
an optical-axis region of the image-side surface of the fourth lens element is concave; and
the lens elements included by the optical imaging lens are only the four lens elements described above;
wherein, TL is a distance from the object-side surface of the first lens element to the image-side surface of the fourth lens element along the optical axis, T1 is a thickness of the first lens element along the optical axis, T3 is a thickness of the third lens element along the optical axis and G34 is an air gap between the third lens element and the fourth lens element along the optical axis, and the optical imaging lens satisfies the relationships: TL/T3≤5.500, an Abbe number of the second lens element equal to an Abbe number of the third lens element and TL/(T1+G34)≥4.500.