Patent ID: 9671591
Date: 2017-06-06
CPC Classifications: G02B

Claim:
1. An optical lens assembly comprising, in order from an object side to an image side: a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof; a second lens element; a third lens element; a fourth lens element having positive refractive power; a fifth lens element having an object-side surface being concave in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof; a sixth lens element having an object-side surface being concave in a paraxial region thereof, wherein the object-side surface and an image-side surface of the sixth lens element are aspheric; and a seventh lens element having an image-side surface being concave in a paraxial region thereof, wherein an object-side surface and the image-side surface of the seventh lens element are aspheric, and the image-side surface of the seventh lens element comprises at least one convex shape in an off-axial region thereof; wherein the optical lens assembly has a total of seven lens elements, there is an air gap between every two of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element and the seventh lens element that are adjacent to each other, a curvature radius of the object-side surface of the sixth lens element is R