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

Claim 14:
15. 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 has positive refractive power, the fourth lens element has positive refractive power, 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 second lens element is larger than a central thickness of the sixth 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, an axial distance between an object-side surface of the second lens element and an image-side surface of the sixth lens element is Dr3r12, an axial distance between the second lens element and the third lens element is T23, an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, an axial distance between the fifth lens element and the sixth lens element is T56, and the following conditions are satisfied:

TL/ImgH<2.4; and

4.0<Dr3r12/(T23+T34+T45+T56).