Optical photographing lens assembly, image capturing unit and electronic device
AssigneeLargan Precision Co., Ltd.
InventorsCheng-Chen Lin, Yu-Tai Tseng, Tzu-Chieh Kuo
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Abstract
An optical 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. Each of the seven lens elements of the optical photographing lens assembly has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The object-side surface of the first lens element is concave in a paraxial region thereof. The object-side surface of the first lens element is aspheric and has at least one critical point in an off-axis region thereof.
Claims30
An optical 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;
- each of the seven lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;
- wherein the object-side surface of the first lens element is concave in a paraxial region thereof, the object-side surface of the first lens element is aspheric and has at least one critical point in an off-axis region thereof, the third lens element has positive refractive power, and the object-side surface of the fifth lens element is concave in a paraxial region thereof;
- wherein a sum of axial distances between each of all adjacent lens elements of the optical photographing lens assembly is ΣAT, an axial distance between the second lens element and the third lens element is T23, a focal length of the optical photographing lens assembly is f, a focal length of the sixth lens element is f6, and the following conditions are satisfied:
- 2.20<ΣAT/T23<12.5;
- and
- |f6/f|<0.90.
An optical 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;
- each of the seven lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;
- wherein the object-side surface of the first lens element is concave in a paraxial region thereof, the object-side surface of the first lens element is aspheric and has at least one critical point in an off-axis region thereof, and the object-side surface of the fifth lens element is concave in a paraxial region thereof;
- wherein a sum of axial distances between each of all adjacent lens elements of the optical photographing lens assembly is ΣAT, an axial distance between the second lens element and the third lens element is T23, a focal length of the optical photographing lens assembly is f, a focal length of the sixth lens element is f6, and the following conditions are satisfied:
- 2.20<ΣAT/T23<7.10;
- and
- |f6/f|<0.90.
An optical 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;
- each of the seven lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;
- wherein the object-side surface of the first lens element is concave in a paraxial region thereof, the object-side surface of the first lens element is aspheric and has at least one critical point in an off-axis region thereof, the image-side surface of the first lens element is convex in a paraxial region thereof, and the third lens element has positive refractive power;
- wherein a sum of axial distances between each of all adjacent lens elements of the optical photographing lens assembly is ΣAT, an axial distance between the second lens element and the third lens element is T23, an axial distance between the fifth lens element and the sixth lens element is T56, a focal length of the optical photographing lens assembly is f, a focal length of the fifth lens element is f5, a central thickness of the fifth lens element is CT5, and the following conditions are satisfied:
- 1.20<ΣAT/T23<90.0;
- −24.0<f5/f<0;
- and
- 1.80<CT5/T56.
Dependencies are inferred from the claim text.