Optical imaging lens assembly including seven lenses of +−++−+−, +−+−−+−, +−−+−+−, +−−−−+−or +−+−++− refractive powers
The present disclosure discloses an optical imaging lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens having positive refractive power; a second lens having negative refractive power; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having refractive power with a convex object-side surface; a sixth lens having positive refractive power with a convex object-side surface a convex image-side surface; and a seventh lens having negative refractive power, wherein a distance TTL along the optical axis from an object-side surface of the first lens to an imaging plane of the optical imaging lens assembly and half of a diagonal length ImgH of an effective pixel area on the imaging plane of the optical imaging lens assembly satisfy ImgH/(TTL/ImgH)>5.0 mm.
1. An optical imaging lens assembly, sequentially from an object side to an image side of the optical imaging lens assembly along an optical axis, comprising:
a first lens having positive refractive power;
a second lens having negative refractive power;
a third lens having refractive power;
a fourth lens having refractive power;
a fifth lens having refractive power with a convex object-side surface;
a sixth lens having positive refractive power with a convex object-side surface and a convex image-side surface; and
a seventh lens having negative refractive power,
wherein ImgH/(TTL/ImgH)>5.0 mm,
where TTL is a distance along the optical axis from an object-side surface of the first lens to an imaging plane of the optical imaging lens assembly, and ImgH is half of a diagonal length of an effective pixel area on the imaging plane of the optical imaging lens assembly; and
wherein 2.3<(DT41+DT51+DT61+DT71)/(DT11+DT21+DT31)<2.8,
where DT11 is a maximum effective radius of the object-side surface of the first lens, DT21 is a maximum effective radius of an object-side surface of the second lens, DT31 is a maximum effective radius of an object-side surface of the third lens, DT41 is a maximum effective radius of an object-side surface of the fourth lens, DT51 is a maximum effective radius of the object-side surface of the fifth lens, DT61 is a maximum effective radius of the object-side surface of the sixth lens, and DT71 is a maximum effective radius of an object-side surface of the seventh lens.
2. The optical imaging lens assembly according to claim 1 , wherein 0.3<f1/(R1+R2)<1.1,
where f1 is an effective focal length of the first lens, R1 is a radius of curvature of the object-side surface of the first lens, and R2 is a radius of curvature of an image-side surface of the first lens.
3. The optical imaging lens assembly according to claim 1 , wherein 0.2<(f6+f7)/f<0.7,
where f is a total effective focal length of the optical imaging lens assembly, f6 is an effective focal length of the sixth lens, and f7 is an effective focal length of the seventh lens.
4. The optical imaging lens assembly according to claim 1 , wherein 0.3<R11/R10<1.0,
where R11 is a radius of curvature of the object-side surface of the sixth lens, and R10 is a radius of curvature of an image-side surface of the fifth lens.
5. The optical imaging lens assembly according to claim 1 , wherein 1.7<(T56+CT6+T67+CT7)/TTL*5<2.2,
where T56 is a spaced interval between the fifth lens and the sixth lens along the optical axis, CT6 is a center thickness of the sixth lens along the optical axis, T67 is a spaced interval between the sixth lens and the seventh lens along the optical axis, CT7 is a center thickness of the seventh lens along the optical axis, and TTL is the distance along the optical axis from the object-side surface of the first lens to the imaging plane of the optical imaging lens assembly.
6. The optical imaging lens assembly according to claim 1 , wherein 40°<Semi-FOV<45°,
where Semi-FOV is half of a maximal field-of-view of the optical imaging lens assembly.
7. The optical imaging lens assembly according to claim 1 , wherein 0.3<f/(R3+R4)<1.0,
where f is a total effective focal length of the optical imaging lens assembly, R3 is a radius of curvature of an object-side surface of the second lens, and R4 is a radius of curvature of an image-side surface of the second lens.
8. The optical imaging lens assembly according to claim 1 , wherein 0.8<f123/f<1.3,
where f123 is a combined focal length of the first lens, the second lens and the third lens, and f is a total effective focal length of the optical imaging lens assembly.
9. The optical imaging lens assembly according to claim 1 , wherein 0.8<SAG72/SAG62<1.5,
where SAG72 is an on-axis distance from an intersection of an image-side surface of the seventh lens and the optical axis to a vertex of an effective radius of the image-side surface of the seventh lens, and SAG62 is an on-axis distance from an intersection of the image-side surface of the sixth lens and the optical axis to a vertex of an effective radius of the image-side surface of the sixth lens.
10. The optical imaging lens assembly according to claim 1 , wherein 1.6<|SAG51+SAG52|/CT5<2.6,
where SAG51 is an on-axis distance from an intersection of the object-side surface of the fifth lens and the optical axis to a vertex of an effective radius of the object-side surface of the fifth lens, SAG52 is an on-axis distance from an intersection of an image-side surface of the fifth lens and the optical axis to a vertex of an effective radius of the image-side surface of the fifth lens, and CT5 is a center thickness of the fifth lens along the optical axis.
11. An optical imaging lens assembly, sequentially from an object side to an image side of the optical imaging lens assembly along an optical axis, comprising:
a first lens having positive refractive power;
a second lens having negative refractive power;
a third lens having refractive power;
a fourth lens having refractive power;
a fifth lens having refractive power with a convex object-side surface;
a sixth lens having positive refractive power with a convex object-side surface and a convex image-side surface; and
a seventh lens having negative refractive power,
wherein 6.0 mm<f*tan(Semi-FOV)<7.0 mm,
where f is a total effective focal length of the optical imaging lens assembly and Semi-FOV is half of a maximal field-of-view of the optical imaging lens assembly; and
wherein 2.3<(DT41+DT51+DT61+DT71)/(DT11+DT21+DT31)<2.8,
where DT11 is a maximum effective radius of an object-side surface of the first lens, DT21 is a maximum effective radius of an object-side surface of the second lens, DT31 is a maximum effective radius of an object-side surface of the third lens, DT41 is a maximum effective radius of an object-side surface of the fourth lens, DT51 is a maximum effective radius of the object-side surface of the fifth lens, DT61 is a maximum effective radius of the object-side surface of the sixth lens, and DT71 is a maximum effective radius of an object-side surface of the seventh lens.
12. The optical imaging lens assembly according to claim 11 , wherein 0.3<f1/(R1+R2)<1.1,
where f1 is an effective focal length of the first lens, R1 is a radius of curvature of an object-side surface of the first lens, and R2 is a radius of curvature of an image-side surface of the first lens.
13. The optical imaging lens assembly according to claim 11 , wherein 0.2<(f6+f7)/f<0.7,
where f is the total effective focal length of the optical imaging lens assembly, f6 is an effective focal length of the sixth lens, and f7 is an effective focal length of the seventh lens.
14. The optical imaging lens assembly according to claim 11 , wherein 1.7<(T56+CT6+T67+CT7)/TTL*5<2.2,
where T56 is a spaced interval between the fifth lens and the sixth lens along the optical axis, CT6 is a center thickness of the sixth lens along the optical axis, T67 is a spaced interval between the sixth lens and the seventh lens along the optical axis, CT7 is a center thickness of the seventh lens along the optical axis, and TTL is a distance along the optical axis from an object-side surface of the first lens to an imaging plane of the optical imaging lens assembly.
15. The optical imaging lens assembly according to claim 11 , wherein 40°<Semi-FOV<45°,
where Semi-FOV is half of the maximal field-of-view of the optical imaging lens assembly.
16. The optical imaging lens assembly according to claim 11 , wherein 0.3<f/(R3+R4)<1.0,
where f is the total effective focal length of the optical imaging lens assembly, R3 is a radius of curvature of an object-side surface of the second lens, and R4 is a radius of curvature of an image-side surface of the second lens.
17. The optical imaging lens assembly according to claim 11 , wherein 0.8<f123/f<1.3,
where f123 is a combined focal length of the first lens, the second lens and the third lens, and f is the total effective focal length of the optical imaging lens assembly.
18. The optical imaging lens assembly according to claim 11 , wherein 1.6<|SAG51+SAG52|/CT5<2.6,
where SAG51 is an on-axis distance from an intersection of the object-side surface of the fifth lens and the optical axis to a vertex of an effective radius of the object-side surface of the fifth lens, SAG52 is an on-axis distance from an intersection of an image-side surface of the fifth lens and the optical axis to a vertex of an effective radius of the image-side surface of the fifth lens, and CT5 is a center thickness of the fifth lens along the optical axis.