US Patent 11372210 Optical imaging lens

An optical imaging lens includes 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 from an object side to an image side in order along an optical axis. The first lens element to the eighth lens element each include an object-side surface facing the object side and an image-side surface facing the image side. The periphery region of the image-side surface of the first lens element is concave. The optical axis region of the image-side surface of the third lens element is concave. The periphery region of the object-side surface of the fourth lens element is concave and the optical axis region of the image-side surface of the fourth lens element is convex. The optical axis region of the image-side surface of the seventh lens element is concave.