Patent ID: 11860447
Assignee: LARGAN PRECISION CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 18:
19. The imaging optical lens assembly of claim 18, wherein the object-side surface of the first lens element is convex in a paraxial region thereof, the image-side surface of the second lens element is concave in a paraxial region thereof, the image-side surface of the third lens element is concave in a paraxial region thereof, the focal length of the imaging optical lens assembly is f, a focal length of the third lens element is f3, a maximum among refractive indices of the five lens elements of the imaging optical lens assembly is Nmax, and the following conditions are satisfied:

−2.80<f/f3<−1.20; and

1.67<Nmax<1.75.