Patent ID: 8760774

Claim:
A six-piece optical lens system comprising, in order from an object side to an image side: a stop; a first lens element with a positive refractive power having a convex object-side surface, at least one of the object-side and an image-side surfaces of the first lens element being aspheric; a second lens element with a negative refractive power having a concave image-side surface, at least one of an object-side and the image-side surfaces of the second lens element being aspheric; a third lens element with a positive refractive power having a convex image-side surface, at least one of an object-side and the image-side surfaces of the third lens element being aspheric; a fourth lens element with a positive refractive power having a concave object-side surface, at least one of the object-side and an image-side surfaces of the fourth lens element being aspheric; a fifth lens element having a convex image-side surface, at least one of an object-side and the image-side surfaces of the fifth lens element being aspheric; and a sixth lens element with a negative refractive power having a concave image-side surface, at least one of an object-side and the image-side surfaces of the sixth lens element being aspheric; wherein the first lens element, second lens element, third lens element, fourth lens element, fifth lens element, sixth lens element are the only lens elements with refractive power within the lens system; a focal length of the second lens element is f2, a focal length of the third lens element is f3, and they satisfy the relation: 0.7<|f2|/|f3|<1.4.