Photographing lens assembly, imaging apparatus and electronic device
AssigneeLargan Precision Co., Ltd.
InventorsHung-Shuo CHEN, Hsin-Hsuan HUANG
Life of this patent
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Abstract
A photographing lens assembly includes seven lens elements, which are, 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, a sixth lens element and a seventh lens element. The third lens element has positive refractive power. The seventh lens element has an image-side surface being concave in a paraxial region thereof, and at least one of an object-side surface and the image-side surface of the seventh lens element includes at least one inflection point. At least one surface of the seven lens elements is aspheric.
Claims29
A photographing lens assembly comprising seven lens elements, the seven 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, a sixth lens element and a seventh lens element;
- wherein the third lens element has positive refractive power;
- the seventh lens element has an image-side surface being concave in a paraxial region thereof, at least one of an object-side surface and the image-side surface of the seventh lens element comprises at least one inflection point;
- and at least one surface of the seven lens elements is aspheric;
- and
- wherein a focal length of the first lens element is f1, a focal length of the third lens element is f3, a focal length of the fifth lens element is f5, an axial distance between an object-side surface of the first lens element and an image surface is TL, a maximum image height of the photographing lens assembly is ImgH, 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, and the following conditions are satisfied:
- |f3/f1|<0.90;
- 1.0<TL/ImgH<2.70;
- 0.10<(R5+R6)/(R5−R6)<8.0;
- and
- |f5/f1|<0.70.
A photographing lens assembly comprising seven lens elements, the seven 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, a sixth lens element and a seventh lens element;
- wherein the third lens element has positive refractive power;
- the seventh lens element has an image-side surface being concave in a paraxial region thereof, at least one of an object-side surface and the image-side surface of the seventh lens element comprises at least one inflection point;
- and at least one surface of the seven lens elements is aspheric;
- and
- wherein a focal length of the first lens element is f1, a focal length of the third lens element is f3, an axial distance between an object-side surface of the first lens element and an image surface is TL, a maximum image height of the photographing lens assembly is ImgH, a curvature radius of the object-side surface of the first lens element is R1, a curvature radius of an image-side surface of the first lens element is R2, 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, and the following conditions are satisfied:
- |f3/f1|<0.90;
- 1.0<TL/ImgH<2.70;
- 0.10<(R5+R6)/(R5−R6)<8.0;
- and
- −1.80<(R1+R2)/(R1−R2).
A photographing lens assembly comprising seven lens elements, the seven 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, a sixth lens element and a seventh lens element;
- wherein the first lens element with positive refractive power has an image-side surface being convex in a paraxial region thereof;
- the third lens element has positive refractive power;
- the fifth lens element has positive refractive power;
- the seventh lens element has an image-side surface being concave in a paraxial region thereof and comprising at least one convex shape in an off-axis region thereof, and at least one surface of the seven lens elements is aspheric;
- and
- wherein a focal length of the first lens element is f1, a focal length of the third lens element is f3, an axial distance between an object-side surface of the first lens element and an image surface is TL, a maximum image height of the photographing lens assembly is ImgH, a curvature radius of the object-side surface of the first lens element is R1, a curvature radius of the image-side surface of the first lens element is R2, 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, and the following conditions are satisfied:
- |f3/f1|<2.0;
- 1.0<TL/ImgH<2.70;
- −5.0<(R5+R6)/(R5−R6);
- and
- 0<(R1+R2)/(R1−R2)<6.0.
Dependencies are inferred from the claim text.