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

Claim 0:
1. 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 outside surface of the first lens element is convex in a paraxial region thereof; the inside surface of the fourth lens element is concave in a paraxial region thereof; at least one of the outside surface and the inside surface of the fourth lens element comprises at least one critical point in an off-axis region thereof;
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; a central thickness of the second lens element is CT2, a central thickness of the fourth lens element is CT4, an f-number of the optical lens assembly is Fno, and the following conditions are satisfied:

0.65<Vd1/Vd2<1.54;

0.65<Vd1/Vd3<1.54;

0.65<Vd1/Vd4<1.54;

10.0<Vd1<38.0;

0<CT2/CT4<1.04; and

1.0<Fno≤1.80.