Image picking-up system, image capturing apparatus and electronic device
AssigneeLargan Precision Co., Ltd.
InventorHsin-Hsuan Huang
Life of this patent
Estimating the term…
Abstract
An image picking-up system includes seven lens elements, which are, in order from an object side to an image side, a first lens group including a first lens element and a second lens element, a second lens group including a third lens element and a fourth lens element, and a third lens group including a fifth lens element, a sixth lens element and a seventh lens element. The third lens element has positive refractive power. The fourth lens element has an image-side surface being concave in a paraxial region thereof. At least one surface of object-side surfaces and image-side surfaces of the seven lens elements includes at least one inflection point.
Claims35
An image picking-up system comprising seven lens elements, the seven lens elements being, in order from an object side to an image side:
- a first lens group comprising:
- a first lens element;
- and
- a second lens element;
- a second lens group comprising:
- a third lens element having positive refractive power;
- and
- a fourth lens element having an image-side surface being concave in a paraxial region thereof;
- and
- a third lens group comprising:
- a fifth lens element;
- a sixth lens element;
- and
- a seventh lens element;
- wherein at least one surface of object-side surfaces and image-side surfaces of the seven lens elements comprises at least one inflection point, a focal length of the image picking-up system is f, 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, an axial distance between the first lens element and the second lens element is T12, a minimum among central thicknesses of all the lens elements of the image picking-up system is CTmin, a maximum among refractive indices of all the lens elements of the image picking-up system is Nmax, and the following conditions are satisfied:
- |f/f1|+|f/f2|<0.35;
- 0.50<f/f3<4.50
- T12/CTmin<4.50;
- and
- 1.66≤Nmax<1.72.
An image picking-up system comprising seven lens elements, the seven lens elements being, in order from an object side to an image side:
- a first lens group comprising:
- a first lens element;
- and
- a second lens element having an object-side surface being convex in a paraxial region thereof;
- a second lens group comprising:
- a third lens element having positive refractive power;
- and
- a fourth lens element;
- and
- a third lens group comprising:
- a fifth lens element;
- a sixth lens element;
- and
- a seventh lens element;
- wherein at least one surface of object-side surfaces and image-side surfaces of the seven lens elements comprises at least one inflection point, a focal length of the image picking-up system is f, 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, 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, a minimum among central thicknesses of all the lens elements of the image picking-up system is CTmin, a maximum among refractive indices of all the lens elements of the image picking-up system is Nmax, and the following conditions are satisfied:
- |f/f1|+|f/f2|<0.50;
- 0.50<f/f3<4.50;
- (T12+T23+T34)/CTmin<5.50;
- and
- 1.66≤Nmax<1.72.
An image picking-up system comprising seven lens elements, the seven lens elements being, in order from an object side to an image side:
- a first lens group comprising:
- a first lens element;
- and
- a second lens element having an object-side surface being convex in a paraxial region thereof;
- a second lens group comprising:
- a third lens element having positive refractive power;
- and
- a fourth lens element;
- and
- a third lens group comprising:
- a fifth lens element;
- a sixth lens element;
- and
- a seventh lens element;
- wherein at least one surface of object-side surfaces and image-side surfaces of the seven lens elements comprises at least one inflection point, a focal length of the image picking-up system is f, 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 maximum among axial distances between every two of the lens elements that are adjacent to each other is ATmax, a minimum among central thicknesses of all the lens elements of the image picking-up system is CTmin, a maximum among refractive indices of all the lens elements of the image picking-up system is Nmax, and the following conditions are satisfied:
- |f/f1|+|f/f2|<0.50;
- 0.50<f/f3<4.50;
- 0<ATmax/CTmin<7.50;
- and
- 1.66≤Nmax<1.72.
An image picking-up system comprising seven lens elements, the seven lens elements being, in order from an object side to an image side:
- a first lens group comprising:
- a first lens element;
- and
- a second lens element;
- a second lens group comprising:
- a third lens element having positive refractive power;
- and
- a fourth lens element having negative refractive power;
- and
- a third lens group comprising:
- a fifth lens element;
- a sixth lens element;
- and
- a seventh lens element;
- wherein at least one surface of object-side surfaces and image-side surfaces of the seven lens elements comprises at least one inflection point, a focal length of the image picking-up system is f, 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, a focal length of the fifth lens element is f5, a maximum among refractive indices of all the lens elements of the image picking-up system is Nmax, and the following conditions are satisfied:
- |f/f1|+|f/f2|<0.50;
- 0.50<f/f3<4.50;
- −2.80<f/f4<−0.40;
- −2.50<f/f5<0.70;
- and
- 1.66≤Nmax<1.72.
Dependencies are inferred from the claim text.