Patent ID: 11886038
Assignee: LARGAN PRECISION CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An imaging optical lens assembly, comprising five lens elements, the five lens elements being, 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; each of the five lens elements comprising an object-side surface facing toward the object side and an image-side surface facing toward the image side;
wherein a total number of lens elements in the imaging optical lens assembly is five, the first lens element has negative refractive power, the object-side surface of the first lens element is concave in a paraxial region thereof, the image-side surface of the second lens element is convex in a paraxial region thereof, both of the object-side surface and the image-side surface of the fourth lens element are aspheric, the object-side surface of the fourth lens element is concave in a paraxial region thereof;
wherein an Abbe number of the third lens element is V3, an Abbe number of the fourth lens element is V4, an Abbe number of the fifth lens element is V5, a focal length of the first lens element is f1, a focal length of the third lens element is f3, and the following conditions are satisfied:

0.3<(V3+V5)/V4<1.0; and

f1/f3<5.0.