Patent ID: 8089698

Claim:
A wide-angle optical lens assembly comprising, in order from an object side to an image side: a first lens element with a negative refractive power having a concave image-side surface; a second lens element with a positive refractive power; a third lens element with a positive refractive power; and a fourth lens element with a positive refractive power having a convex image-side surface, wherein at least one surface of the fourth lens element is aspheric, and the fourth lens element is made of plastic material; wherein a radius of curvature of the image-side surface of the first lens element is R2, a radius of curvature of the object-side surface of the second lens element is R3, a radius of curvature of the image-side surface of the is second lens element is R4, a thickness on the optical axis of the first lens element is CT1, a thickness on the optical axis of the fourth lens element is CT4, and they satisfy the following relationships: 0.0 <R 2/ CT 1<5.0; −3.5<( R 3+ R 4)/( R 3− R 4)<0.0; and 0.0 <CT 4/ CT 1<1.5.