Optical image assembly, image capturing apparatus and electronic device
AssigneeLargan Precision Co., Ltd.
InventorsChun-Yen Chen, Shu-Yun Yang
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Abstract
An optical image assembly includes six 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 and a sixth lens element. The second lens element with negative 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 has positive refractive power. The fourth lens element has positive refractive power. The fifth lens element has positive refractive power. The sixth lens element has negative refractive power.
Claims25
An optical image 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 with negative 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;
- a third lens element having positive refractive power;
- a fourth lens element having positive refractive power;
- a fifth lens element having positive refractive power;
- and
- a sixth lens element having negative refractive power;
- wherein a sum of central thicknesses of the lens elements of the optical image assembly is ΣCT, a sum of axial distances between every two of the lens elements of the optical image assembly that are adjacent to each other is ΣAT, 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 optical image assembly is f, a curvature radius of an object-side surface of the fifth lens element is R9, and the following conditions are satisfied:
- 1.90≤ΣCT/ΣAT<4.50;
- −0.38<f2/f1<15.0;
- and
- −1.30<f/R9 <5.0.
An optical image assembly comprising six lens elements, the six lens elements being, in order from an object side to an image side:
- a first lens element having negative refractive power;
- a second lens element with negative 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;
- a third lens element having positive refractive power;
- a fourth lens element having positive refractive power;
- a fifth lens element having positive refractive power;
- and
- a sixth lens element having negative refractive power;
- wherein a focal length of the optical image assembly is f, a curvature radius of the object-side surface of the second lens element is R3, a curvature radius of the image-side surface of the second lens element is R4, a curvature radius of an object-side surface of the fifth lens element is R9, a curvature radius of an image-side surface of the fifth lens element is R10, and the following conditions are satisfied:
- −9.0<f/R3+f/R4<−1.10;
- and
- −1.80<(R9+R10)/(R9−R10)<1.80.
An optical image 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 with negative 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;
- a third lens element having positive refractive power;
- a fourth lens element having positive refractive power;
- a fifth lens element having positive refractive power;
- and
- a sixth lens element with negative refractive power having an image-side surface being convex in a paraxial region thereof, wherein the image-side surface of the sixth lens element comprises a concave shape in an off-axial region thereof.
Dependencies are inferred from the claim text.