IMAGE CAPTURING OPTICAL LENS SYSTEM

摘要

An image capturing optical lens 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, and a sixth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element has refractive power. The third lens element with refractive power has a concave image-side surface. The fourth lens element has refractive power, and at least one surface thereof is aspheric. The fifth lens element with negative refractive power has a concave object-side surface and a convex image-side surface, and the surfaces thereof are aspheric. The sixth lens element with refractive power has a convex object-side surface, and an image-side surface changing from concave at a paraxial region thereof to convex at a peripheral region thereof, and the surfaces are aspheric.

主权项

1. An image capturing optical lens system comprising, in order from an object side to an image side:
a first lens element with positive refractive power having an object-side surface being convex at a paraxial region thereof; a second lens element having refractive power; a third lens element with refractive power having an image-side surface being concave at a paraxial region thereof; a fourth lens element having refractive power, wherein at least one of an object-side surface and an image-side surface of the fourth lens element is aspheric; a fifth lens element with negative refractive power having an object-side surface being concave at a paraxial region thereof and an image-side surface being convex at a paraxial region thereof, wherein the object-side surface and the image-side surface of the fifth lens element are aspheric; and a sixth lens element with refractive power having an object-side surface being convex at a paraxial region thereof and an image-side surface being concave at a paraxial region thereof, wherein the image-side surface of the sixth lens element changes from concave at the paraxial region thereof to convex at a peripheral region thereof, and the object-side surface and the image-side surface of the sixth lens element are aspheric; wherein the image capturing optical lens system has a total of six lens elements, there is an air space between any two of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element and the sixth lens element which are adjacent to each other, a maximum image height of the image capturing optical lens system is ImgH, an axial distance between the object-side surface of the first lens element and an image plane is TTL, and the following relationship is satisfied:
TTL/ImgH<1.8.