CPC G02B 9/64 (2013.01) [G02B 13/0045 (2013.01); G02B 27/0037 (2013.01); H04N 23/54 (2023.01)] | 12 Claims |
1. An optical imaging system comprising:
a first lens having a positive refractive power, a convex object-side surface in a paraxial region thereof and a concave image-side surface in the paraxial region thereof;
a second lens having a refractive power, a convex object-side surface in a paraxial region thereof and a concave image-side surface in the paraxial region thereof;
a third lens having a positive refractive power;
a fourth lens having a refractive power;
a fifth lens having a refractive power and a convex object-side surface in a paraxial region thereof;
a sixth lens having a refractive power and a concave object-side surface in a paraxial region thereof;
a seventh lens having a positive refractive power, a convex object-side surface in a paraxial region thereof and a concave image-side surface in the paraxial region thereof; and
an eighth lens having a negative refractive power and a convex object-side surface in a paraxial region thereof,
wherein the first to eighth lenses are sequentially arranged from an object side of the optical imaging system,
wherein the optical imaging system has a total of eight lenses,
wherein −0.5<(|Ri|−|Rj|)/(|Ri|+|Rj|)<0.5 is satisfied, where Ri is a radius of curvature of the object-side surface of the seventh lens, and Rj is a radius of curvature of the image-side surface of the seventh lens.
|