CPC G02B 9/64 (2013.01) [G02B 7/02 (2013.01); G02B 27/0025 (2013.01)] | 14 Claims |
1. An optical imaging system comprising:
a first lens having positive refractive power and a concave image-side surface;
a second lens having negative refractive power and a concave image-side surface;
a third lens having a refractive power;
a fourth lens having a refractive power;
a fifth lens having positive refractive power;
a sixth lens having a refractive power;
a seventh lens having a refractive power; and
an eighth lens having a refractive power,
wherein the first to eighth lenses are sequentially disposed in numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system, and
wherein a radius of curvature of an object-side surface of the second lens is greater than a radius of curvature of an image-side surface of the first lens.
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