Patent ID: 11906714
Assignee: LARGAN PRECISION CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 20:
21. A photographing optical lens assembly comprising seven lens elements, the seven lens elements being, in order from an object side to an image side along an optical path, 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 first lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof, the third lens element with positive refractive power has an image-side surface being convex in a paraxial region thereof, the fourth lens element has positive refractive power, the fifth lens element has an object-side surface being concave in a paraxial region thereof, the seventh lens element has an image-side surface being concave in a paraxial region thereof, the image-side surface of the seventh lens element has at least one convex critical point in an off-axis region thereof, and a central thickness of the seventh lens element is larger than a central thickness of the third lens element;
wherein an axial distance between the object-side surface of the first lens element and an image surface is TL, a maximum image height of the photographing optical lens assembly is ImgH, a maximum effective radius of the object-side surface of the first lens element is Y11, and the following conditions are satisfied:

TL/ImgH<2.4; and

0.50<Y11/ImgH<1.25.