Patent ID: 11960058
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical imaging system comprising:
a first lens having positive refractive power and a convex object-side surface;
a second lens having negative refractive power, a convex object-side surface and a concave image-side surface;
a third lens having refractive power;
a fourth lens having positive refractive power, and
wherein the first to fourth lenses are sequentially disposed from an object side toward an image side on an optical axis,
wherein the optical imaging system has a total of four lenses,
wherein 1.3<TTL/BFL<3.5 is satisfied, where TTL is a distance from the object-side surface of the first lens to an imaging plane, and BFL is a distance from an image-side surface of the fourth lens to the imaging plane, and
wherein FOV≤40° is satisfied, where FOV is a field of view of the optical imaging system.