Imaging optical lens assembly, image capturing unit and electronic device
AssigneeLargan Precision Co., Ltd.
InventorsChun-Yen CHEN, Shu-Yun YANG
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Abstract
An imaging optical lens assembly 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 has negative refractive power. The second lens element has negative refractive power. The third lens element has negative refractive power. The imaging optical lens assembly has a total of six lens elements.
Claims28
An imaging optical lens assembly comprising six lens elements, the six lens elements being, 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;
- wherein the first lens element has negative refractive power, the second lens element has negative refractive power, the third lens element has negative refractive power, and the third lens element has an object-side surface being concave in a paraxial region thereof;
- wherein a focal length of the imaging 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, 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 focal length of the sixth lens element is f6, a focal length of the i-th lens element is fi, a sum of absolute values of ratios f/fi is Σ|f/fi|, a curvature radius of the object-side surface of the third lens element is R5, a curvature radius of an image-side surface of the third lens element is R6, and the following conditions are satisfied:
- 2.47≦Σ|f/fi|<5.0, wherein i=1,2,3,4,5,6;
- and
- −4.0<(R5+R6)/(R5−R6)<0.65.
An imaging optical lens assembly comprising six lens elements, the six lens elements being, 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;
- wherein the first lens element has negative refractive power, the second lens element has negative refractive power, the third lens element has negative refractive power, and the third lens element has an object-side surface being concave in a paraxial region thereof;
- wherein at least one of an object-side surface of the second lens element, an image-side surface of the second lens element, the object-side surface of the third lens element and an image-side surface of the third lens element has at least one inflection point, a focal length of the imaging 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, 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 focal length of the sixth lens element is f6, a focal length of the i-th lens element is fi, a sum of absolute values of ratios f/fi is Σ|f/fi|, a curvature radius of the object-side surface of the third lens element is R5, a curvature radius of the image-side surface of the third lens element is R6, and the following conditions are satisfied:
- 2.0<Σ|f/fi|<5.0, wherein i=1,2,3,4,5,6;
- and
- −4.0<(R5+R6)/(R5−R6)<0.65.
An imaging optical lens assembly comprising six lens elements, the six lens elements being, 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;
- wherein the first lens element has negative refractive power, the second lens element has negative refractive power, and the third lens element has negative refractive power;
- wherein a focal length of the imaging 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, 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 focal length of the sixth lens element is f6, a focal length of the i-th lens element is fi, a sum of absolute values of ratios f/fi is Σ|f/fi|, a curvature radius of an object-side surface of the third lens element is R5, a curvature radius of an image-side surface of the third lens element is R6, a curvature radius of an object-side surface of the sixth lens element is R11, an entrance pupil diameter of the imaging optical lens assembly is EPD, an axial distance between an object-side surface of the first lens element and an image-side surface of the sixth lens element is Td, a maximum image height of the imaging optical lens assembly is ImgH, and the following conditions are satisfied:
- 2.0<Σ|f/fi|<5.0, wherein i=1,2,3,4,5,6;
- −4.50<(R5+R6)/(R5−R6)<2.80;
- |R11/EPD|<1.50;
- and
- 1.0<Td/ImgH≦5.64.
An imaging optical lens assembly comprising six lens elements, the six lens elements being, 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;
- wherein the first lens element has negative refractive power, the second lens element has negative refractive power, the third lens element has negative refractive power, the third lens element has an object-side surface being concave in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof;
- wherein an axial distance between the first lens element and the second lens element is T12, a focal length of the imaging optical lens assembly is f, and the following condition is satisfied:
- 0.80<T12/f<2.0.
Dependencies are inferred from the claim text.