Imaging lens assembly

摘要

An imaging lens assembly includes five lens elements with refractive power, 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 and a fifth lens element. The first lens element with positive 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 with refractive power has a concave image-side surface, wherein both of an object-side surface and the image-side surface of the fourth lens element are aspheric. The fifth lens element with refractive power has a concave image-side surface, wherein at least one inflection point is formed on the image-side surface of the fifth lens element, and both of an object-side surface and the image-side surface of the fifth lens element are aspheric.

主权项

1. An imaging lens assembly comprising five lens elements with refractive power, in order from an object side to an image side:
a first lens element with positive 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 with refractive power having a concave image-side surface, wherein both of an object-side surface and the image-side surface of the fourth lens element are aspheric; and a fifth lens element with refractive power having a concave image-side surface, wherein at least one inflection point is formed on the image-side surface of the fifth lens element, and both of an object-side surface and the image-side surface of the fifth lens element are aspheric; wherein a focal length of the first lens element is f1, a focal length of the second lens element is f2, a curvature radius of the object-side surface of the first lens element is R1, a curvature radius of an image-side surface of the first lens element is R2, and the following relationships are satisfied:
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