Optical imaging lens assembly
The present disclosure discloses an optical imaging lens assembly. The lens assembly sequentially includes, along an optical axis from an object side to an image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, each of the first to seventh lenses having refractive powers. The first lens has a negative refractive power, an object-side surface of the first lens is a convex surface, and an image-side surface of the first lens is a concave surface; an image-side surface of the third lens is a concave surface; an object-side surface of the seventh lens is a concave surface; and a total effective focal length f of the optical imaging lens assembly, an effective focal length f4 of the fourth lens, and an effective focal length f5 of the fifth lens satisfy: |f/f4|+|f/f5|<1.
1. An optical imaging lens assembly, comprising sequentially, along an optical axis from an object side to an image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, each of the first to seventh lenses having a refractive power, wherein,
the first lens has a negative refractive power, an object-side surface of the first lens is a convex surface, and an image-side surface of the first lens is a concave surface;
an image-side surface of the third lens is a concave surface;
an object-side surface of the seventh lens is a concave surface;
a total effective focal length f of the optical imaging lens assembly, an effective focal length f4 of the fourth lens, and an effective focal length f5 of the fifth lens satisfy: |f/f4|+|f/f5|<1; and
a total track length TTL of the optical imaging lens assembly and a half of a diagonal length ImgH of an effective pixel area on an image plane of the optical imaging lens assembly satisfy: TTL/ImgH≤1.5.
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 entrance pupil diameter EPD of the optical imaging lens assembly satisfy: f/EPD≤1.60.
3. The optical imaging lens assembly according to claim 1 , wherein an effective focal length f1 of the first lens and the total effective focal length f of the optical imaging lens assembly satisfy: −0.5<f/f1<0.
4. The optical imaging lens assembly according to claim 1 , wherein an effective focal length f2 of the second lens and a radius R3 of curvature of an object-side surface of the second lens satisfy: 1.5<f2/R3<2.5.
5. The optical imaging lens assembly according to claim 1 , wherein an effective focal length f6 of the sixth lens and a radius R12 of curvature of an image-side surface of the sixth lens satisfy: −2<f6/R12<−1.
6. The optical imaging lens assembly according to claim 5 , wherein the effective focal length f6 of the sixth lens and an effective focal length f7 of the seventh lens satisfy: −1.05<f6/f7<−1.
7. The optical imaging lens assembly according to claim 1 , wherein a center thickness CT4 of the fourth lens on the optical axis and a center thickness CT5 of the fifth lens on the optical axis satisfy: 0.5<CT4/CT5<2.0.
8. The optical imaging lens assembly according to claim 7 , wherein a center thickness CT1 of the first lens on the optical axis and a center thickness CT7 of the seventh lens on the optical axis satisfy: 1.00<CT1/CT7<1.50.
9. The optical imaging lens assembly according to claim 1 , wherein a radius R5 of curvature of an object-side surface of the third lens and a radius R6 of curvature of the image-side surface of the third lens satisfy: 1.5<(R5+R6)/(R5−R6)≤80.
10. The optical imaging lens assembly according to claim 1 , wherein a radius R13 of curvature of the object-side surface of the seventh lens and a radius R14 of curvature of an image-side surface of the seventh lens satisfy: |R13/R14|<2.
11. An optical imaging lens assembly, comprising sequentially, along an optical axis from an object side to an image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, each of the first to seventh lenses having a refractive power, wherein,
an object-side surface of the first lens is a convex surface, and an image-side surface of the first lens is a concave surface;
an image-side surface of the third lens is a concave surface;
an object-side surface of the seventh lens is a concave surface;
a center thickness CT1 of the first lens on the optical axis and a center thickness CT7 of the seventh lens on the optical axis satisfy: 1.00≤CT1/CT7<1.50; and
a total track length TTL of the optical imaging lens assembly and a half of a diagonal length ImgH of an effective pixel area on an image plane of the optical imaging lens assembly satisfy: TTL/ImgH≤1.5.
12. The optical imaging lens assembly according to claim 11 , wherein a radius R13 of curvature of the object-side surface of the seventh lens and a radius R14 of curvature of an image-side surface of the seventh lens satisfy: |R13/R14|<2.
13. The optical imaging lens assembly according to claim 12 , wherein a radius R5 of curvature of an object-side surface of the third lens and a radius R6 of curvature of the image-side surface of the third lens satisfy: 1.5<(R5+R6)/(R5−R6)≤80.
14. The optical imaging lens assembly according to claim 11 , wherein an effective focal length f6 of the sixth lens and a radius R12 of curvature of an image-side surface of the sixth lens satisfy: −2<f6/R12<−1.
15. The optical imaging lens assembly according to claim 11 , wherein an effective focal length f6 of the sixth lens and an effective focal length f7 of the seventh lens satisfy: −1.5<f6/f7<−1.
16. The optical imaging lens assembly according to claim 11 , wherein a total effective focal length f of the optical imaging lens assembly, an effective focal length f4 of the fourth lens, and an effective focal length f5 of the fifth lens satisfy: |f/f4|+|f/f5|<1.
17. The optical imaging lens assembly according to claim 11 , wherein an effective focal length f2 of the second lens and a radius R3 of curvature of an object-side surface of the second lens satisfy: 1.5<f2/R3<2.5.
18. The optical imaging lens assembly according to claim 11 , wherein an effective focal length f1 of the first lens and a total effective focal length f of the optical imaging lens assembly satisfy: −0.5<f/f1<0.
19. The optical imaging lens assembly according to claim 11 , wherein a center thickness CT4 of the fourth lens on the optical axis and a center thickness CT5 of the fifth lens on the optical axis satisfy: 0.5<CT4/CT5<2.0, wherein the 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≤1.60.