Optical imaging lens
AssigneeGlory Science Co., Ltd.
InventorsFeng-Chao CHUNG, Kun-Ti LIU
Life of this patent
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Abstract
An optical imaging lens includes an aperture stop and an optical assembly, the optical assembly includes, in order from the object side to the image side: a first lens element with a refractive power; a second lens element with a negative refractive power; a third lens element with a positive refractive power; a fourth lens element with a negative refractive power; a fifth lens element with a refractive power; wherein a focal length of the optical imaging lens is f, focal lengths of the first, second, third, fourth and fifth lens elements are f1, f2, f3, f4, f5, respectively, a radius of curvature of an image-side surface of the first lens element is R2, satisfying: |f3|≦|fn|, wherein n=1, 2, 4 and 5; −1<R2/f<0.
Claims19
An optical imaging lens comprising an aperture stop and an optical assembly, the optical assembly comprising:
- in order from an object side to an image side:
- a first lens element with a refractive power having an aspheric object-side surface and an aspheric image-side surface being convex near an optical axis;
- a second lens element with a negative refractive power having an aspheric object-side surface being convex near an optical axis and an aspheric image-side surface being concave near an optical axis, the second lens element being made of plastic material;
- a third lens element with a positive refractive power having an aspheric object-side surface and an aspheric image-side surface being convex near an optical axis, the third lens element being made of plastic material;
- a fourth lens element with a negative refractive power having an aspheric object-side surface being concave near an optical axis and an aspheric image-side surface being convex near an optical axis, the fourth lens element being made of plastic material;
- a fifth lens element with a refractive power having an aspheric object-side surface being convex near an optical axis and an aspheric image-side surface being concave near an optical axis, the fifth lens element being made of plastic material, at least one inflection point being formed on the image-side surface of the fifth lens element;
- wherein a focal length of the optical imaging lens is f, 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 third lens element is f3, a focal length of the fourth lens element is f4, a focal length of the fifth lens element is f5, a radius of curvature of the image-side surface of the first lens element is R2, and the following conditions are satisfied:
- |f3|≦|fn|, wherein n=1,2,4 and 5;
- −1<R2/f<0.
An optical imaging lens comprising an aperture stop and an optical assembly, the optical assembly comprising:
- in order from an object side to an image side:
- a first lens element with a positive refractive power having an aspheric object-side surface being concave near an optical axis and an aspheric image-side surface being convex near an optical axis;
- a second lens element with a negative refractive power having an aspheric object-side surface being convex near an optical axis and an aspheric image-side surface being concave near an optical axis, the second lens element being made of plastic material;
- a third lens element with a positive refractive power having an aspheric object-side surface and an aspheric image-side surface being convex near an optical axis, the third lens element being made of plastic material;
- a fourth lens element with a negative refractive power having an aspheric object-side surface being concave near an optical axis and an aspheric image-side surface being convex near an optical axis, the fourth lens element being made of plastic material;
- a fifth lens element with a refractive power having an aspheric object-side surface being convex near an optical axis and an aspheric image-side surface being concave near an optical axis, the fifth lens element being made of plastic material, and at least one inflection point being formed on the image-side surface of the fifth lens element.
Dependencies are inferred from the claim text.