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

Claim 15:
16. A photographing optical lens assembly comprising seven lens elements, and the seven 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, a fifth lens element, a sixth lens element and a seventh lens element;
wherein the seventh lens element has an image-side surface being concave in a paraxial region thereof, and the image-side surface of the seventh lens element has at least one inflection point;
wherein a focal length of the photographing optical lens assembly is f, an entrance pupil diameter of the photographing optical lens assembly is EPD, an axial distance between the second lens element and the third lens element is T23, a central thickness of the second lens element is CT2, a curvature radius of an object-side surface of the sixth lens element is R11, a curvature radius of an image-side surface of the sixth lens element is R12, and the following conditions are satisfied:

1.2<f/EPD≤1.8;

0.44≤T23/CT2<3.0; and

−2.0<(R11−R12)/(R11+R12)<0.2.