| 摘要 |
An imaging lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element and a third lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The second lens element with refractive power has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The third lens element with refractive power has an image-side surface being concave in a paraxial region thereof, wherein the image-side surface of the third lens element has at least one convex shape in an off-axis region thereof, and both of an object-side surface and the image-side surface are aspheric. The imaging lens assembly has a total of three lens elements with refractive power. |
| 主权项 |
1. An imaging lens assembly comprising, in order from an object side to an image side:
a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof; a second lens element with refractive power having an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof; and a third lens element with refractive power having an image-side surface being concave in a paraxial region thereof, wherein an object-side surface and the image-side surface of the third lens element are aspheric, and the image-side surface of the third lens element has at least a convex shape in an off-axis region thereof; wherein the imaging lens assembly has a total of three lens elements with refractive power, an Abbe number of the first lens element is V1, an Abbe number of the second lens element is V2, a focal length of the first lens element is f1, a focal length of the second lens element is f2, 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, and the following relationships are satisfied:
−4.0<(V1+V2)/(V1−V2)<−1.5;0<|f1/f2|<0.9; and0<T12/T23≦3.0. |
