Electronic device
AssigneeLargan Precision Co., Ltd.
InventorsHung-Shuo CHEN, Chien-Hsun WU, 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, and 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 convex in a paraxial region thereof. The second lens element has an inside surface being convex in a paraxial region thereof. The fourth lens element has an inside surface being concave in a paraxial region thereof, wherein at least one of an outside surface and the inside surface of the fourth lens element includes at least one critical point in an off-axis region thereof.
Claims20
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.
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 first lens element is CT1, a central thickness of the second lens element is CT2, a central thickness of the fourth lens element is CT4, an axial distance between the first lens element and the second lens element is T12, and the following conditions are satisfied:
- 0.65<Vd1/Vd2<1.54
- 0.65<Vd1/Vd3<1.54
- 0.65<Vd1/Vd4<1.54
- 14.0<Vd1<30.0;
- 0<CT2/CT4<1.04;
- and
- 1.01≤CT1/T12<3.5.
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.
Dependencies are inferred from the claim text.