US 12,443,012 B2
Optical imaging lens including seven lenses of +−++−+−, +−+−−+−, +−−+−−+ or +−++++− refractive powers
Qingzhi Zhu, Fujian (CN); Chuanbo Dong, Fujian (CN); Hai Lin, Fujian (CN); and Hung-Chien Hsieh, Taichung (TW)
Assigned to Genius Electronic Optical (Xiamen) Co., Ltd., Fujian (CN)
Filed by Genius Electronic Optical (Xiamen) Co., Ltd., Fujian (CN)
Filed on Apr. 12, 2022, as Appl. No. 17/718,341.
Claims priority of application No. 202111490385.0 (CN), filed on Dec. 8, 2021.
Prior Publication US 2023/0176333 A1, Jun. 8, 2023
Int. Cl. G02B 13/00 (2006.01); G02B 9/64 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/64 (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, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element, the first lens element to the seventh lens element each having an object-side surface facing toward the object side and allowing imaging rays to pass through as well as an image-side surface facing toward the image side and allowing the imaging rays to pass through, wherein:
an optical axis region of the image-side surface of the first lens element is concave;
the second lens element has negative refracting power;
a periphery region of the image-side surface of the third lens element is concave;
an optical axis region of the object-side surface of the fourth lens element is concave;
an optical axis region of the object-side surface of the fifth lens element is concave; and
a periphery region of the object-side surface of the seventh lens element is concave, wherein lens elements included by the optical imaging lens are only the seven lens elements described above, T1 is a thickness of the first lens element along the optical axis, D42t72 is defined as the a distance from the image-side surface of the fourth lens element to the image-side surface of the seventh lens element along the optical axis, Fno is an f-number of the optical imaging lens, D12t32 is defined as the a distance from the image-side surface of the first lens element to the image-side surface of the third lens element along the optical axis to satisfy 2.550≤(T1+D42t72)/(Fno*D12t32).