Patent ID: 8736979

Claim:
An image lens assembly system comprising, in order from an object side to an image side: a first lens element with negative refractive power having a convex object-side surface; a second lens element having positive refractive power; a third lens element having refractive power; a fourth lens element having refractive power; a fifth lens element having refractive power; a sixth lens element with positive refractive power made of plastic material, wherein at least one of an object-side surface and an image-side surface of the sixth lens element is aspheric; and a seventh lens element with negative refractive power made of plastic material having a concave image-side surface, wherein the image-side surface changes from concave at a paraxial region to convex at a peripheral region, and at least one of an object-side surface and the image-side surface thereof is aspheric; wherein a focal length of the image lens assembly system is f, a composite focal length of the first lens element and the second lens element is f12, a sum of central thicknesses from the first through seventh lens elements is ΣCT, an axial distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element is Td, and the following relationships are satisfied: 0.60<ΣCT/ Td< 0.90; and 0.1 <f/f 12<1.8.