Image capturing optical lens system, imaging apparatus and electronic device
AssigneeLargan Precision Co., Ltd.
InventorsKuan-Ting YEH, Wei-Yu CHEN
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Abstract
An image capturing optical lens system includes four lens elements, which are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element has an object-side surface being convex in a paraxial region thereof. The third lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The fourth lens element has negative refractive power.
Claims20
An image capturing optical lens system comprising four lens elements, the four lens elements being, in order from an object side to an image side along an optical path:
- a first lens element, a second lens element, a third lens element and a fourth lens element;
- wherein the second lens element has negative refractive power;
- the third lens element has positive refractive power;
- the fourth lens element has an object-side surface being concave in a paraxial region thereof;
- wherein the image capturing optical lens system further comprises an aperture stop disposed between the second lens element and the fourth lens element;
- a curvature radius of an object-side surface of the third lens element and a curvature radius of an image-side surface of the third lens element have the same sign;
- an axial distance between the second lens element and the third lens element is greater than an axial distance between the third lens element and the fourth lens element;
- wherein an Abbe number of the second lens element is V2, an Abbe number of the third lens element is V3, a central thickness of the first lens element is CT1, a central thickness of the second lens element is CT2, and the following conditions are satisfied:
- 10<V2+V3<70;
- and
- 0.30<CT1/CT2<3.0.
An image capturing optical lens system comprising four lens elements, the four lens elements being, in order from an object side to an image side along an optical path:
- a first lens element, a second lens element, a third lens element and a fourth lens element;
- wherein the second lens element has negative refractive power;
- the third lens element has positive refractive power;
- wherein the image capturing optical lens system further comprises an aperture stop disposed between the second lens element and the third lens element;
- a curvature radius of an image-side surface of the first lens element and a curvature radius of an object-side surface of the third lens element have the same sign;
- the curvature radius of the image-side surface of the first lens element and a curvature radius of an image-side surface of the fourth lens element have the same sign;
- an axial distance between the second lens element and the third lens element is greater than a central thickness of the fourth lens element;
- wherein an Abbe number of the second lens element is V2, an Abbe number of the third lens element is V3, and the following condition is satisfied:
- 10<V2+V3<70.
Dependencies are inferred from the claim text.