IMAGE LENS ASSEMBLY SYSTEM

摘要

An image lens assembly system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with negative refractive power has a convex object-side surface. The second lens element has positive refractive power. The third lens element has refractive power. The fourth lens element has refractive power. The fifth lens element has refractive power. The sixth lens element with refractive power is made of plastic material, wherein at least one surface of the sixth lens element is aspheric. The seventh lens element with refractive power made of plastic material has a concave image-side surface changing from concave in a paraxial region to convex in a peripheral region, and at least one surface thereof is aspheric.

主权项

1. 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 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 refractive power made of plastic material and having a concave image-side surface, wherein the image-side surface of the seventh lens element changes from concave in a paraxial region thereof to convex in a peripheral region thereof, and at least one of an object-side surface and the image-side surface thereof is aspheric; wherein 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 relationship is satisfied:
0.60<ΣCT/Td<0.90.