US 9,791,670 B2Granted

Optical lens, image capturing device and electronic device

AssigneeLargan Precision Co., Ltd.

InventorsCheng-Chen Lin, Wei-Yu Chen

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Abstract

An optical lens includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. The second lens element has refractive power. The third lens element has positive refractive power. The fourth lens element with positive refractive power has an image-side surface being convex in a paraxial region thereof. The fifth lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof and including one convex shape in an off-axial region thereof. The sixth lens element with refractive power has an image-side surface being concave in a paraxial region thereof and including one convex shape in an off-axial region thereof.

Claims24

Dependent claims

An optical lens comprising, in order from an object side to an image side:

a first lens element with negative refractive power having an image-side surface being concave in a paraxial region thereof;
a second lens element;
a third lens element having positive refractive power;
a fourth lens element with positive refractive power having an image-side surface being convex in a paraxial region thereof, wherein an object-side surface and the image-side surface of the fourth lens element are aspheric;
a fifth lens element with negative refractive power having an image-side surface being concave in a paraxial region thereof and comprising at least one convex shape in an off-axial region thereof, wherein an object-side surface and the image-side surface of the fifth lens element are aspheric;
and
a sixth lens element having an image-side surface being concave in a paraxial region thereof and comprising at least one convex shape in an off-axial region thereof, wherein an object-side surface and the image-side surface of the sixth lens element are aspheric;
wherein the optical lens has a total of six lens elements, a focal length of the first lens element is f1, a focal length of the second lens element is f2, an axial distance between the first lens element and the second lens element is T12, 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:
−0.20<|f1|/f2<1.50;
1.0<T12/T23;
and
1.25<T12/(T34+T45+T56)<4.0.

9 more elements

An optical lens comprising, in order from an object side to an image side:

a first lens element with negative refractive power having an image-side surface being concave in a paraxial region thereof;
a second lens element;
a third lens element having positive refractive power;
a fourth lens element with positive refractive power having an image-side surface being convex in a paraxial region thereof, wherein an object-side surface and the image-side surface of the fourth lens element are aspheric;
a fifth lens element with negative refractive power having an image-side surface being concave in a paraxial region thereof, wherein an object-side surface and the image-side surface of the fifth lens element are aspheric;
and
a sixth lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof, and an image-side surface being concave in a paraxial region thereof and comprising at least one convex shape on the image-side surface in an off-axial region thereof, wherein the object-side surface and the image-side surface of the sixth lens element are aspheric;
wherein the optical lens has a total of six lens elements, 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 fourth lens element is f4, a focal length of the sixth lens element is f6, an axial distance between the first lens element and the second lens element is T12, 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:
−1.50<|f1|/f2<4.0;
0<f6/f4<4.0;
and
1.25<T12/(T34+T45+T56)<4.0.

9 more elements

Dependencies are inferred from the claim text.