Patent ID: 11933948
Assignee: LARGAN PRECISION CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. The photographing optical lens assembly of claim 1, wherein the focal length of the photographing optical lens assembly is f, the focal length of the first lens element is f1, the focal length of the second lens element is f2, a focal length of the third lens element is f3, a focal length of the fourth lens element is f4, a focal length of the fifth lens element is f5, a focal length of the sixth lens element is f6, a focal length of the seventh lens element is f7, a focal length of the j-th lens element is fj, a maximum absolute value among the ratios of f/f1, f/f2, f/f3, f/f4, f/f5, f/f6 and f/f7 is |f/fj|max, a maximum refractive index among the seven lens elements is Nmax, and the following conditions are satisfied:

|f/fj|max<1.8, wherein j=1,2,3,4,5,6,7; and

1.640≤N max<1.750.