US 11,940,604 B2
Optical imaging lens
Jia-Sin Jhang, Taichung (TW); Ruyou Tang, Fujian (CN); and Yongfeng Lai, Fujian (CN)
Assigned to GENIUS ELECTRONIC OPTICAL (XIAMEN) CO., LTD., Xiamen (CN)
Filed by GENIUS ELECTRONIC OPTICAL (XIAMEN) CO., LTD., Fujian (CN)
Filed on May 27, 2022, as Appl. No. 17/826,187.
Application 17/826,187 is a continuation of application No. 16/659,586, filed on Oct. 22, 2019, granted, now 11,372,210.
Application 16/659,586 is a continuation of application No. 15/917,842, filed on Mar. 12, 2018, granted, now 10,488,627, issued on Nov. 26, 2019.
Claims priority of application No. 201711474865.1 (CN), filed on Dec. 29, 2017.
Prior Publication US 2022/0365324 A1, Nov. 17, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 13/00 (2006.01); G02B 1/04 (2006.01); G02B 9/64 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 1/041 (2013.01); G02B 9/64 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical imaging lens, 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, a seventh lens element and an eighth lens element arranged in sequence from an object side to an image side along an optical axis, wherein the first lens element to the eighth lens element each comprise an object-side surface facing the object side and allowing imaging rays to pass through and an image-side surface facing the image side and allowing the imaging rays to pass through,
wherein,
lens elements of the optical imaging lens are only the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element, the seventh lens element, and the eighth lens element;
a periphery region of the image-side surface of the first lens element is concave;
an optical axis region of the image-side surface of the seventh lens element is concave, and a periphery region of the image-side surface of the seventh lens element is convex; and
an optical axis region of the object-side surface of the eighth lens element is concave,
wherein the optical imaging lens satisfies the following expression: BFL/G78≤6.500, wherein BFL is a distance from the image-side surface of the eighth lens element to an image plane along the optical axis, and G78 is an air gap between the seventh lens element and the eighth lens element along the optical axis,
wherein when a surface of the lens element has at least one transition point, a region of the surface from a central point to a nearest transition point is defined as the optical axis region, and a region located radially outside of a farthest transition point from the optical axis to an optical boundary of the surface is defined as the periphery region, where a tangent to the at least one transition point is perpendicular to the optical axis, the central point is a point of intersection of the surface and the optical axis, and the optical boundary is defined as a point at which a radially outermost marginal ray passing through the surface intersects the surface of the lens element,
wherein when the surface of the lens element has no transition point, the optical axis region is defined as a region of 0%-50% of a distance between the optical axis and the optical boundary of the surface, and the periphery region is defined as a region of 50%-100% of the distance between the optical axis and the optical boundary of the surface.