Electronic device
AssigneeLargan Precision Co., Ltd.
InventorsHung-Shuo Chen, Tzu-Chieh Kuo
Life of this patent
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Abstract
An electronic device includes at least one optical lens assembly. The optical lens assembly includes four lens elements. The four lens elements are, 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. The first lens element has an outside surface being concave in a paraxial region thereof and an inside surface being convex in a paraxial region thereof. The fourth lens element has an inside surface being convex in a paraxial region thereof.
Claims28
An electronic device, comprising at least one 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 having an outside surface being concave in a paraxial region thereof and an inside surface being convex in a paraxial region thereof;
- a second lens element;
- a third lens element;
- and
- a fourth lens element having an inside surface being convex in a paraxial region thereof;
- wherein a central thickness of the first lens element is CT1, a central thickness of the fourth lens element is CT4, a focal length of the first lens element is f1, a focal length of the second lens element is f2, a focal length of the third lens element is f3, a focal length of the fourth lens element is f4, and the following conditions are satisfied:
- 0<CT1/CT4<2.7;
- and
- |f3/f1|+|f3/f2|+|f3/f4|<0.85.
An electronic device, comprising at least one 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 having an outside surface being concave in a paraxial region thereof and an inside surface being convex in a paraxial region thereof;
- a second lens element;
- a third lens element;
- and
- a fourth lens element having an outside surface being concave in a paraxial region thereof;
- wherein a central thickness of the first lens element is CT1, a central thickness of the fourth lens element is CT4, a focal length of the optical lens assembly is f, a focal length of the first lens element is f1, a focal length of the second lens element is f2, and the following conditions are satisfied:
- 0<CT1/CT4<0.62;
- and
- |f/f1|+|f/f2|<1.25.
An electronic device, comprising at least one 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 having an outside surface being concave in a paraxial region thereof and an inside surface being convex in a paraxial region thereof;
- a second lens element;
- a third lens element having positive refractive power;
- and
- a fourth lens element;
- wherein a focal length of the first lens element is f1, a focal length of the second lens element is f2, a focal length of the third lens element is f3, a focal length of the fourth lens element is f4, an f-number of the optical lens assembly is Fno, and the following conditions are satisfied:
- |f3/f1|+|f3/f2|˜|f3/f4|≤0.69;
- and
- 1.0<Fno<3.0.
Dependencies are inferred from the claim text.