Camera lens assembly
The present disclosure describes a camera lens assembly having a total effective focal length f and an entrance pupil diameter EPD satisfying f/EPD≤1.9. The camera lens assembly includes, sequentially along an optical axis from an object side to an image side, the first to the seventh lenses. The first lens has a positive refractive power, and a convex object side surface; the second lens has a positive refractive power, and a convex object side surface and a convex image side surface; the third lens has a negative refractive power; the fourth lens and the fifth lens have a positive refractive power or negative refractive power; the sixth lens has a positive refractive power or negative refractive power, and a concave image side surface of the sixth lens is in a paraxial region; and the seventh lens has a negative refractive power, and a concave image side surface in the paraxial region.
1. A camera lens assembly, having a total effective focal length f and an entrance pupil diameter EPD, the camera 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,
wherein,
the first lens has a positive refractive power, and an object side surface of the first lens is a convex surface;
the second lens has a positive refractive power, and an object side surface and an image side surface of the second lens are convex surfaces;
the third lens has a negative refractive power;
the fourth lens and the fifth lens have a positive refractive power or a negative refractive power;
the sixth lens has a positive refractive power or a negative refractive power, and an image side surface of the sixth lens is a concave surface in a paraxial region; and
the seventh lens has a negative refractive power, an image side surface of the seventh lens is a concave surface in the paraxial region,
wherein the total effective focal length f and the entrance pupil diameter EPD satisfy: f/EPD≤1.9,
wherein the camera lens assembly has and only has seven lenses having refractive power, and
wherein the total effective focal length f and a radius of curvature of the image side surface of the seventh lens R 14 satisfy: 2.5<f/R 14 <4.0.
2. The camera lens assembly according to claim 1 , wherein the seventh lens has at least one inflection point.
3. The camera lens assembly according to claim 1 , wherein a distance from the object side surface of the first lens to an image plane of the camera lens assembly on the optical axis TTL and half a diagonal length of an effective pixel area on the image plane of the camera lens assembly ImgH satisfy: TTL/ImgH≤1.7.
4. The camera lens assembly according to claim 1 , wherein an effective focal length of the first lens f 1 and an effective focal length of the second lens f 2 satisfy: 0.5<f 1 /f 2 <1.5.
5. The camera lens assembly according to claim 1 , wherein an effective focal length of the second lens f 2 and an effective focal length of the third lens f 3 satisfy: −2<f 2 /f 3 <0.
6. The camera lens assembly according to claim 1 , wherein the total effective focal length f and an effective focal length of the first lens f 1 satisfy: f/f 1 ≤0.9.
7. The camera lens assembly according to claim 1 , wherein a center thickness of the fifth lens CT 5 , a center thickness of the sixth lens CT 6 , and a center thickness of the seventh lens CT 7 satisfy: 0.1<CT 5 /(CT 6 +CT 7 )<0.8.
8. The camera lens assembly according to claim 1 , wherein a center thickness of the first lens CT 1 and a center thickness of the second lens CT 2 satisfy: 0.6<CT 1 /CT 2 <1.5.
9. The camera lens assembly according to claim 1 , wherein an air spacing between the sixth lens and the seventh lens on the optical axis T 67 and a center thickness of the seventh lens CT 7 satisfy: 0.2<T 67 /CT 7 <1.
10. The camera lens assembly according to claim 1 , wherein a maximum effective radius of the object side surface of the first lens DT 11 and a maximum effective radius of an image side surface of the third lens DT 33 satisfy: 0.8<DT 11 /DT 33 <1.5.
11. A camera 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,
wherein an image side surface of the second lens is a convex surface,
the sixth lens has a positive refractive power or a negative refractive power, and an image side surface of the sixth lens is a concave surface in a paraxial region; and
the seventh lens has a negative refractive power, and an image side surface of the sixth lens is a concave surface in the paraxial region, and
an air spacing between the sixth lens and the seventh lens on the optical axis T 67 and a center thickness of the seventh lens CT 7 satisfy: 0.2<T 67 /CT 7 <1, and
wherein the camera lens assembly has and only has seven lenses having refractive power.
12. The camera lens assembly according to claim 11 , wherein
the first lens has a positive refractive power, and an object side surface of the first lens is a convex surface;
the second lens has a positive refractive power, and an object side surface of the second lens is a convex surface;
the third lens has a negative refractive power; and
the fourth lens and the fifth lens have a positive refractive power or a negative refractive power.
13. The camera lens assembly according to claim 12 , wherein an effective focal length of the first lens f 1 and an effective focal length of the second lens f 2 satisfy: 0.5<f 1 /f 2 <1.5.
14. The camera lens assembly according to claim 12 , wherein an effective focal length of the second lens f 2 and an effective focal length of the third lens f 3 satisfy: −2<f 2 /f 3 <0.
15. The camera lens assembly according to claim 12 , wherein a center thickness of the first lens CT 1 and a center thickness of the second lens CT 2 satisfy: 0.6<CT 1 /CT 2 <1.5.
16. The camera lens assembly according to claim 12 , wherein a maximum effective radius of the object side surface of the first lens DT 11 and a maximum effective radius of an image side surface of the third lens DT 33 satisfy: 0.8<DT 11 /DT 33 <1.5.
17. The camera lens assembly according to claim 12 , wherein a center thickness of the fifth lens CT 5 , a center thickness of the sixth lens CT 6 , and a center thickness of the seventh lens CT 7 satisfy: 0.1<CT 5 /(CT 6 +CT 7 )<0.8.
18. The camera lens assembly according to claim 12 , wherein an air spacing between the sixth lens and the seventh lens on the optical axis T 67 and a center thickness of the seventh lens CT 7 satisfy: 0.2<T 67 /CT 7 <1.
19. The camera lens assembly according to claim 13 , the camera lens assembly having a total effective focal length f and an entrance pupil diameter EPD, wherein the total effective focal length f and the entrance pupil diameter EPD satisfy: f/EPD≤1.9.