Optical imaging lens

Abstract

An optical imaging lens comprises, sequentially from the object side to the image side along an optical axis, a first lens group, an aperture, and a second lens group. The first lens group consists of a first lens and a second lens arranged along the optical axis from the object side to the image side; the first lens has negative refractive power; the second lens has negative refractive power. The second lens group consists of a third lens, a fourth lens, a fifth lens, and a sixth lens arranged along the optical axis from the object side to the image side; the third lens has positive refractive power; the fourth lens has positive refractive power; the fifth lens has negative refractive power; and the sixth lens has positive refractive power. The optical imaging lens satisfies the condition: 0.1 < Fno / F < 0.5, where Fno is the aperture value of the optical imaging lens, and F is the focal length of the optical imaging lens. Through the lens arrangement and optical conditions of the aforementioned optical imaging lens, good image quality is achieved.

Claims

1. An optical imaging lens, comprising, sequentially from an object side to an image side along an optical axis: a first lens group consisting of a first lens and a second lens arranged along the optical axis from the object side to the image side; wherein the first lens has negative refractive power, the object side surface of the first lens is convex, and the image side surface of the first lens is concave; the second lens has negative refractive power, the object side surface of the second lens is concave, and the image side surface of the second lens is convex; an aperture; and a second lens group consisting of a third lens, a fourth lens, a fifth lens, and a sixth lens arranged along the optical axis from the object side to the image side; wherein the third lens is a biconvex lens with positive refractive power; the fourth lens is a biconvex lens with positive refractive power; the fifth lens is a biconcave lens with negative refractive power; the sixth lens has positive refractive power, the object side surface of the sixth lens is convex, and the image side surface of the sixth lens is concave; wherein... The optical imaging lens consists of six lenses with refractive power arranged in sequence. The optical imaging lens satisfies the following condition: 0.1 < Fno / F < 0.5, where Fno is the aperture value of the optical imaging lens and F is the focal length of the optical imaging lens.

2. The optical imaging lens as claimed in claim 1, wherein the first lens and the second lens are respectively separated by an air gap on the optical axis, the second lens and the third lens are respectively separated by an air gap on the optical axis, the third lens and the fourth lens are respectively separated by an air gap on the optical axis, the fourth lens and the fifth lens are respectively separated by an air gap on the optical axis, and the fifth lens and the sixth lens are respectively separated by an air gap on the optical axis.

3. The optical imaging lens as claimed in claim 1, wherein the object-side surface and the image-side surface of the first lens are both spherical; the object-side surface and the image-side surface of the second lens are both aspherical; the object-side surface and the image-side surface of the third lens are both aspherical; the object-side surface and the image-side surface of the fourth lens are both spherical; the object-side surface and the image-side surface of the fifth lens are both aspherical; and the object-side surface and the image-side surface of the sixth lens are both aspherical.

4. The optical imaging lens as described in claim 1, wherein the optical imaging lens satisfies the following condition: 0.5 < F / f3 < 0.75, where, F is the focal length of the optical imaging lens, and f3 is the focal length of the third lens.

5. The optical imaging lens as described in claim 1, wherein the optical imaging lens satisfies the following condition: 0.5 < F / f4 < 0.9, where, F is the focal length of the optical imaging lens, and f4 is the focal length of the fourth lens.

6. The optical imaging lens as described in claim 1, wherein the optical imaging lens satisfies the following condition: -1.0 < F / f5 < -0.5, where, F is the focal length of the optical imaging lens, and f5 is the focal length of the fifth lens.

7. The optical imaging lens as described in claim 1, wherein the optical imaging lens satisfies the following condition: -0.45 < Fno / f1 < -0.1, where Fno is the aperture value of the optical imaging lens and f1 is the focal length of the first lens.

8. The optical imaging lens as described in claim 1, wherein the optical imaging lens satisfies the following condition: 0.15 < Fno / f3 < 0.5, where Fno is the aperture value of the optical imaging lens and f3 is the focal length of the third lens.

9. The optical imaging lens as claimed in claim 1, wherein the optical imaging lens satisfies the following condition: 0.1 < Fno / f4 < 0.5, where Fno is the aperture value of the optical imaging lens and f4 is the focal length of the fourth lens.

10. The optical imaging lens as claimed in claim 1, wherein the optical imaging lens satisfies the following condition: Vd3 > 60, where Vd3 is the dispersion coefficient of the third lens.

Images