OPTICAL PHOTOGRAPHING LENS ASSEMBLY, IMAGE CAPTURING DEVICE AND ELECTRONIC DEVICE

摘要

An optical 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 and a fifth lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The second lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. The third lens element has two surfaces being both aspheric. The fourth lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof, wherein two surfaces thereof are aspheric. The fifth lens element has an image-side surface being convex in a paraxial region thereof, wherein two surfaces thereof are aspheric.

主权项

1. An optical photographing lens assembly 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 in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof; a second lens element with negative refractive power having an image-side surface being concave in a paraxial region thereof; a third lens element having an object-side surface and an image-side surface being both aspheric; a fourth lens element with negative refractive power having an image-side surface being concave in a paraxial region thereof, wherein an object-side surface and the image-side surface of the fourth lens element are aspheric; and a fifth lens element having an image-side surface being convex in a paraxial region thereof, wherein an object-side surface and the image-side surface of the fifth lens element are aspheric; wherein the optical photographing lens assembly has a total of five lens elements, there is an air space between every two lens elements of the first lens element, the second lens element, the third lens element, the fourth lens element and the fifth lens element that are adjacent to each other, a focal length of the first lens element is f1, a focal length of the third lens element is f3, an axial distance between the image-side surface of the fifth lens element and an image surface is BL, an axial distance between the object-side surface of the first lens element and the image-side surface of the fifth lens element is TD, a curvature radius of the object-side surface of the first lens element is R1, a curvature radius of the image-side surface of the first lens element is R2, an axial distance between the second lens element and the third lens element is T23, an axial distance between the third lens element and the fourth lens element is T34, and the following conditions are satisfied:
f1/f3<0.65;BL/TD<0.80;R1