Patent ID: 11927829
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical imaging system, comprising:
a first lens comprising a positive refractive power and a concave image-side surface;
a second lens comprising a convex object-side surface;
a third lens comprising a refractive power;
a fourth lens comprising a refractive power;
a fifth lens comprising a refractive power;
a sixth lens comprising a convex object-side surface and a concave image-side surface; and
a seventh lens comprising a negative refractive power,
wherein the first to seventh lenses are sequentially disposed from an object side toward an imaging plane,
wherein an absolute value of a radius of curvature of an image-side surface of the fourth lens is greater than an absolute value of a radius of curvature of the object-side surface of the sixth lens, and
wherein 3.0<|f4/f|, where f is an overall focal length of the optical imaging system and f4 is a focal length of the fourth lens.