Patent ID: 8363335

Claim:
An optical lens system comprising, in order from an object side to an image side: 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 stop; a second lens element with a negative refractive power having a concave object-side surface, at least one of the object-side and an image-side surfaces of the second lens element being aspheric; a third lens element with a positive refractive power having a concave image-side surface, at least one of an object-side and the image-side surfaces of the third lens element being aspheric; wherein a focal length of the first lens element is f1, a focal length of the second lens element is f2, and they satisfy the relations: 0.4<| f 1|/| f 2|<1.0; 0.5<| f 2|/| f 3|<1.3.