Patent ID: 9235032
Filing Date: 2016-01-12
CPC Classification: G02B

Claim Text:
1. A photographing optical lens comprising, in order from an object side to an image side: a first lens element having positive refractive power; a second lens element; a third lens element having an image-side surface being convex in a paraxial region thereof, wherein a curvature of the image-side surface of the third lens element is greater than a curvature of an object-side surface of the third lens element; a fourth lens element; a fifth lens element with negative refractive power having an image-side surface being concave in a paraxial region thereof, wherein an object-side surface and the image-side surface of the fifth lens element are aspheric; and a sixth lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, wherein the object-side surface and the image-side surface of the sixth lens element are aspheric, and the image-side surface of the sixth lens element has at least one inflection point; wherein the photographing optical lens has a total of six lens elements, the photographing optical lens further comprises a stop, the stop is located between an object and the second lens element, a focal length of the photographing optical lens is f, a focal length of the fifth lens element is f5, a focal length of the sixth lens element is f6, a curvature radius of the image-side surface of the third lens element is R6, a curvature radius of the image-side surface of the fifth lens element is R10, a curvature radius of the object-side surface of the sixth lens element is R11, and the following relationships are satisfied: