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US 2019/0056568 A1Published application
Image capturing optical assembly, imaging apparatus and electronic device
AssigneeLargan Precision Co., Ltd.
InventorHsin-Hsuan HUANG
Life of this patent
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Abstract
An image capturing optical assembly includes, in order from an object side to an image side, a first lens group, a second lens group and a third lens group, wherein the first lens group includes a first lens element and a second lens element, the second lens group includes a third lens element, a fourth lens element and a fifth lens element, and the third lens group includes a sixth lens element, a seventh lens element and an eighth lens element. At least one surface of at least one of the lens elements of each lens group is aspheric. At least one surface of at least one of the lens elements includes at least one inflection point.
Claims35
An image capturing optical assembly comprising, in order from an object side to an image side:
- a first lens group, a second lens group and a third lens group;
- wherein the first lens group comprises, in order from the object side to the image side, a first lens element and a second lens element;
- the second lens group comprises, in order from the object side to the image side, a third lens element, a fourth lens element and a fifth lens element;
- and the third lens group comprises, in order from the object side to the image side, a sixth lens element, a seventh lens element and an eighth lens element;
- wherein each of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element, the seventh lens element and the eighth lens element has an object-side surface facing towards the object side and an image-side surface facing towards the image side;
- wherein at least one surface of at least one of the lens elements of the first lens group is aspheric, at least one surface of at least one of the lens elements of the second lens group is aspheric, and at least one surface of at least one of the lens elements of the third lens group is aspheric;
- wherein at least one surface of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element, the seventh lens element and the eighth lens element comprises at least one inflection point;
- wherein each of at least two of the eight lens elements has an Abbe number smaller than 23.0;
- wherein a maximum of refractive indexes of all the lens elements of the image capturing optical assembly is Nmax, a minimum of refractive indexes of all the lens elements of the image capturing optical assembly is Nmin, a focal length of the image capturing optical assembly is f, an entrance pupil diameter of the image capturing optical assembly is EPD, and the following conditions are satisfied:
- 1.30<Nmax<1.75;
- 1.20<Nmin<1.60;
- and
- 1.0<f/EPD<1.70.
10 more elements
An image capturing optical assembly comprising, in order from an object side to an image side:
- a first lens group, a second lens group and a third lens group;
- wherein the first lens group comprises, in order from the object side to the image side, a first lens element and a second lens element, the second lens group comprises, in order from the object side to the image side, a third lens element, a fourth lens element and a fifth lens element, and the third lens group comprises, in order from the object side to the image side, a sixth lens element, a seventh lens element and an eighth lens element;
- wherein each of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element, the seventh lens element and the eighth lens element has an object-side surface facing towards the object side and an image-side surface facing towards the image side;
- wherein at least one surface of at least one of the lens elements of the first lens group is aspheric, at least one surface of at least one of the lens elements of the second lens group is aspheric, and at least one surface of at least one of the lens elements of the third lens group is aspheric;
- wherein at least one surface of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element, the seventh lens element and the eighth lens element comprises at least one inflection point;
- wherein at least one of the lens elements has an Abbe number smaller than 24.0;
- wherein a maximum of refractive indexes of all the lens elements of the image capturing optical assembly is Nmax, a minimum of refractive indexes of all the lens elements of the image capturing optical assembly is Nmin, a focal length of the image capturing optical assembly is f, an entrance pupil diameter of the image capturing optical assembly is EPD, an axial distance between the object-side surface of the first lens element and an image surface is TL, and the following conditions are satisfied:
- 1.30<Nmax<1.95;
- 1.20<Nmin<1.60;
- 1.0<f/EPD≤≤1.63;
- and
- TL/f<1.60.
9 more elements
An image capturing optical assembly comprising, in order from an object side to an image side:
- a first lens group, a second lens group and a third lens group;
- wherein the first lens group comprises, in order from the object side to the image side, a first lens element and a second lens element;
- the second lens group comprises, in order from the object side to the image side, a third lens element, a fourth lens element and a fifth lens element;
- and the third lens group comprises, in order from the object side to the image side, a sixth lens element, a seventh lens element and an eighth lens element;
- wherein each of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element, the seventh lens element and the eighth lens element has an object-side surface facing towards the object side and an image-side surface facing towards the image side;
- wherein at least one surface of at least one of the lens elements of the first lens group is aspheric, at least one surface of at least one of the lens elements of the second lens group is aspheric, and at least one surface of at least one of the lens elements of the third lens group is aspheric;
- wherein at least one of the seventh lens element and the eighth lens element comprises at least one inflection point;
- wherein at least one of the fourth lens element, the fifth lens element, the sixth lens element, the seventh lens element and the eighth lens element has an Abbe number smaller than 23.0;
- wherein a maximum of refractive indexes of all the lens elements of the image capturing optical assembly is Nmax, a minimum of refractive indexes of all the lens elements of the image capturing optical assembly is Nmin, an entrance pupil diameter of the image capturing optical assembly is EPD, an axial distance between the object-side surface of the first lens element and an image surface is TL, and the following conditions are satisfied:
- 1.30<Nmax<1.95;
- 1.20<Nmin<1.60;
- and
- 1.0<TL/EPD<2.27.
10 more elements
Dependencies are inferred from the claim text.