Patent ID: 11899279
Assignee: LARGAN PRECISION CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 13:
14. An electronic device, comprising an optical lens assembly, which comprises four lens elements, the four lens elements being in order from an outside to an inside:
a first lens element, a second lens element, a third lens element and a fourth lens element;
wherein each of the four lens elements has an outside surface facing towards the outside and an inside surface facing towards the inside;
wherein the first lens element has negative refractive power, the outside surface of the first lens element is convex in a paraxial region thereof, the inside surface of the first lens element is concave in a paraxial region thereof; the outside surface of the fourth lens element is convex in a paraxial region thereof;
at least one of the four lens elements is made of plastic material and has at least one of the outside surface and the inside surface being aspheric;
wherein, when a measurement is made in accordance with a reference wavelength as a d-line, an Abbe number of the first lens element is Vd1, an Abbe number of the second lens element is Vd2, an Abbe number of the third lens element is Vd3, an Abbe number of the fourth lens element is Vd4, and the following conditions are satisfied:

0.65<Vd1/Vd2<1.54;

0.65<Vd1/Vd3<1.54;

0.65<Vd1/Vd4<1.54; and

14.0<Vd1<30.0.