Photographing lens assembly

摘要

A photographing lens assembly 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 at a paraxial region. The second through the sixth lens elements have refractive power. The fourth lens element has a concave object-side surface at a paraxial region and a convex image-side surface at a paraxial region. The fifth lens element has an aspheric object-side surface and an aspheric image-side surface. The sixth lens element has a concave image-side surface at a paraxial region, wherein the image-side surface thereof has a convex shape at an off-axis region, and both surfaces thereof are aspheric. The photographing lens assembly has a total of six lens elements with refractive power.

主权项

1. A photographing lens assembly comprising, in order from an object side to an image side thereof:
a first lens element with positive refractive power having a convex object-side surface at a paraxial region thereof; a second lens element having refractive power; a third lens element having refractive power; a fourth lens element with refractive power having a concave object-side surface at a paraxial region thereof and a convex image-side surface at a paraxial region thereof; a fifth lens element having refractive power, wherein both of an object-side surface and an image-side surface of the fifth lens element are aspheric; and a sixth lens element with refractive power having a concave image-side surface at a paraxial region thereof, wherein the it age-side surface of the sixth lens element has a convex shape at an off-axis region thereof, and both of an object-side surface and the image-side surface of the sixth lens element are aspheric; wherein the photographing lens assembly has a total of six lens elements with refractive power, there is a gap in a paraxial region 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 that are adjacent to each other, a focal length of the photographing lens assembly is f, a curvature radius of an object-side surface of the third lens element R5, a curvature radius of an image-side surface of the third lens element is R6, a curvature radius of the object-side surface of the fifth lens element is R9, a curvature radius of the image-side surface of the fifth lens element is R10, a focal length of the fifth lens element is f5, and the following relationships are satisfied:
|f/R5|+|f/R6|<1.3;|f/R9|+|f/R10|<1.1; and−0.7