Patent ID: 11906709
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. An optical imaging system, comprising:
a first lens comprising a refractive power;
a second lens comprising a concave image-side surface;
a third lens comprising a refractive power;
a fourth lens comprising negative refractive power and a convex object-side surface;
a fifth lens comprising a refractive power;
a sixth lens comprising a concave image-side surface; and
a seventh lens comprising a refractive power,
wherein the first to seventh lenses are sequentially disposed from an object side to an image plane,
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 seventh lens, and
wherein BFL/f<0.15, where BFL represents a distance from an image-side surface of the seventh lens to the imaging plane and f is a focal length of the optical imaging system.