Optical imaging lens assembly

1. An optical imaging lens assembly, sequentially comprising from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens;

wherein the fifth lens has a negative refractive power; and

an object-side surface of the sixth lens is a concave surface, and an image-side surface of the sixth lens is a convex surface;

wherein a maximum field of view FOV of the optical imaging lens assembly satisfies 100°<FOV<120°;

ImgH is a half the diagonal length of an effective pixel region on an imaging surface of the optical imaging lens assembly, and imgH satisfies ImgH>4.5mm; and

a total effective focal length f of the optical imaging lens assembly and an Entrance Pupil Diameter (EPD) of the optical imaging lens assembly satisfy f/EPD<2;

an effective focal length f4 of the fourth lens and the total effective focal length f of the optical imaging lens assembly satisfy 0.3<f/f4<1.3.

2. The optical imaging lens assembly according to claim 1 , wherein the total effective focal length f of the optical imaging lens assembly and an effective focal length f7 of the seventh lens satisfy −1<f7/f<0.

3. The optical imaging lens assembly according to claim 1 , wherein an effective focal length f5 of the fifth lens and an effective focal length f6 of the sixth lens satisfy 0.3<(f5+f6)/(f5−f6)<0.8.

4. The optical imaging lens assembly according to claim 1 , wherein a combined focal length f123 of the first lens, the second lens and the third lens and a combined focal length f 67 of the sixth lens and the seventh lens satisfy 0<f67/f123<1.0.

5. The optical imaging lens assembly according to claim 1 , wherein an edge thickness ET 3 of the third lens and a center thickness CT 3 of the third lens on the optical axis satisfy 0.3<ET 3 /CT 3 <0.8.

6. The optical imaging lens assembly according to claim 1 , wherein an edge thickness ET 5 of the fifth lens and a center thickness CT 5 of the fifth lens on the optical axis satisfy 0.3<CT 5 /ET 5 <0.8.

7. The optical imaging lens assembly according to claim 1 , wherein an edge thickness ET 2 of the second lens, an edge thickness ET 6 of the sixth lens and an edge thickness ET 7 of the seventh lens satisfy 0.3<(ET 2 +ET 6 )/ET 7 <0.8.

8. The optical imaging lens assembly according to claim 1 , wherein a maximum effective radius DT 12 of an image-side surface of the first lens and a maximum effective radius DT 61 of the object-side surface of the sixth lens satisfy 0.5<DT 12 /DT 61 <1.0.

9. The optical imaging lens assembly according to claim 1 , wherein an on-axis distance SAG 41 from an intersection point of an object-side surface of the fourth lens and the optical axis to an effective radius vertex of the object-side surface of the fourth lens, an on-axis distance SAG 62 from an intersection point of the image-side surface of the sixth lens and the optical axis to an effective radius vertex of the image-side surface of the sixth lens and an on-axis distance SAG 71 from an intersection point of an object-side surface of the seventh lens and the optical axis to an effective radius vertex of the object-side surface of the seventh lens satisfy 0.3<(SAG 41 +SAG 71 )/SAG 62 <0.8.

10. The optical imaging lens assembly according to claim 1 , wherein a curvature radius R 3 of an object-side surface of the second lens and a curvature radius R 4 of an image-side surface of the second lens satisfy 0.3<R 3 /R 4 <1.3.

11. The optical imaging lens assembly according to claim 10 , wherein the object-side surface of the second lens is a convex surface, and the image-side surface of the second lens is a concave surface.

12. The optical imaging lens assembly according to claim 1 , wherein a curvature radius R 6 of an image-side surface of the third lens and a curvature radius R 8 of an image-side surface of the fourth lens satisfy 0.3<R 6 /(R 6 +R 8 )<1.0.

13. The optical imaging lens assembly according to claim 12 , wherein

the image-side surface of the third lens is a convex surface; and

the image-side surface of the fourth lens is a convex surface.

14. The optical imaging lens assembly according to claim 1 , wherein a curvature radius R 11 of the object-side surface of the sixth lens and a curvature radius R 12 of the image-side surface of the sixth lens satisfy 0.5<(R 11 −R 12 )/(R 11 +R 12 )<1.0.

15. The optical imaging lens assembly according to claim 14 , wherein the sixth lens has a positive refractive power.

16. The optical imaging lens assembly according to claim 1 , wherein a curvature radius R 13 of an object-side surface of the seventh lens and a curvature radius R 14 of an image-side surface of the seventh lens satisfy 0.3<(R 13 −R 14 )/(R 13 +R 14 )<0.8.

17. The optical imaging lens assembly according to claim 16 , wherein the seventh lens has a negative refractive power, the object-side surface of the seventh lens is a convex surface, and the image-side surface of the seventh lens is a concave surface.

18. The optical imaging lens assembly according to claim 1 , wherein a center thickness CT 1 of the first lens on the optical axis, a center thickness CT 4 of the fourth lens on the optical axis and a center thickness CT 6 of the sixth lens on the optical axis satisfy 0.7<(CT 1 +CT 4 )/CT 6 <1.2.

19. The optical imaging lens assembly according to claim 1 , wherein a center thickness CT 7 of the seventh lens on the optical axis and a sum ΣAT of spacing distances of any two adjacent lenses in the first lens to the seventh lens on the optical axis satisfy 0.3<CT 7 /ΣAT<0.8.