Image capturing lens system

摘要

An image capturing 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 and a fourth lens element. The first lens element with positive refractive power has a convex object-side surface in a paraxial region thereof and a convex image-side surface in a paraxial region thereof. The second lens element has positive refractive power. The third lens element has positive refractive power. The fourth lens element with negative refractive power has a concave image-side surface in a paraxial region thereof, wherein both of an object-side surface and the image-side surface of the fourth lens element are aspheric. The image capturing lens system has a total of four lens elements with refractive power.

主权项

1. An image capturing lens system comprising, in order from an object side to an image side:
a first lens element with positive refractive power having a convex object-side surface in a paraxial region thereof and a convex image-side surface in a paraxial region thereof; a second lens element having positive refractive power; a third lens element having positive refractive power; and a fourth lens element with negative refractive power having a concave image-side surface in a paraxial region thereof, wherein both of an object-side surface and the image-side surface of the fourth lens element are aspheric; wherein the image capturing lens system has a total of four lens elements with refractive power, a focal length of the first lens element is f1, a focal length of the second lens element is f2, a focal length of the third lens element is f3, a central thickness of the first lens element is CT1, a central thickness of the second lens element is CT2, an axial distance between the first lens element and the second lens element is T12, an axial distance between the second lens element and the third lens element is T23, and the following relationships are satisfied:
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