Optical imaging system, imaging apparatus and electronic device
AssigneeLargan Precision Co., Ltd.
InventorsChien-Hsun Wu, Tzu-Chieh Kuo, Kuan-Ming Chen
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Abstract
An optical imaging system includes five lens elements, the five lens elements being, in order from an object side to an image side: a first lens element having positive refractive power; a second lens element having negative refractive power; a third lens element having positive refractive power; a fourth lens element having positive refractive power; and a fifth lens element having negative refractive power.
Claims40
An optical imaging system, comprising five lens elements, the five lens elements being, in order from an object side to an image side:
- a first lens element having positive refractive power;
- a second lens element having negative refractive power;
- a third lens element having positive refractive power;
- a fourth lens element having positive refractive power;
- and
- a fifth lens element having negative refractive power,
- wherein an Abbe number of the third lens element is V3, an Abbe number of the fifth lens element is V5, 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, an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, and the following conditions are satisfied:
- 20.0<V3+V5<70.0;
- 4.4<(T12+T23)/(T34+T45)<25;
- 0.05<T12/T23<3.3.
An optical imaging system, comprising five lens elements, the five lens elements being, in order from an object side to an image side:
- a first lens element having positive refractive power;
- a second lens element with negative refractive power having an image-side surface being concave in a paraxial region thereof;
- a third lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof;
- a fourth lens element having positive refractive power;
- and
- a fifth lens element having negative refractive power having an image-side surface being concave in a paraxial region thereof,
- wherein 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, an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, a focal length of the optical imaging system is f, a curvature radius of the object-side surface of the third lens element is R5, and the following conditions are satisfied:
- 4.4<(T12+T23)/(T34+T45)<100;
- 0.19<T12/T23<9.7;
- 0.22<f/R5<8.0.
An optical imaging system, comprising five lens elements, the five lens elements being, in order from an object side to an image side:
- a first lens element having positive refractive power;
- a second lens element having negative refractive power;
- a third lens element having positive refractive power;
- a fourth lens element having positive refractive power;
- and
- a fifth lens element having negative refractive power,
- wherein 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, an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, a central thickness of the third lens element is CT3, a composite focal length of the first lens element and the second lens element is f12, a composite focal length of the third lens element, the fourth lens element and the fifth lens element is f345, and the following conditions are satisfied:
- 2.7<(T12+T23)/(T34+T45)<100;
- 0.50<T23/CT3<1.24;
- −5.5<f12/f345<0.
An optical imaging system, comprising five lens elements, the five lens elements being, in order from an object side to an image side:
- a first lens element having positive refractive power;
- a second lens element having negative refractive power;
- a third lens element having positive refractive power;
- a fourth lens element having positive refractive power;
- and
- a fifth lens element having negative refractive power,
- wherein 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, an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, a focal length of the optical imaging system is f, a curvature radius of an image-side surface of the fifth lens element is R10, and the following conditions are satisfied:
- 4.4<(T12+T23)/(T34+T45)<20;
- 4.0<f/R10<10.
Dependencies are inferred from the claim text.