Patent ID: 11914118
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 10:
11. An optical imaging system comprising:
a first lens having a refractive power;
a second lens having positive refractive power;
a third lens having a convex object-side surface;
a fourth lens having positive refractive power and a convex object-side surface;
a fifth lens having negative refractive power;
a sixth lens having positive refractive power and a concave object-side surface; and
a seventh lens having negative refractive power,
wherein the first to seventh lenses are sequentially disposed from an object side to an imaging plane,
wherein a thickness along an optical axis of the fifth lens is greater than a thickness along an optical axis of the first lens,
wherein the optical imaging system satisfies 0.1<Nd2−Nd3<0.2, where Nd2 is a refractive index of the second lens and Nd3 is a refractive index of the third lens, and
wherein the optical imaging system comprises no more than three lens groups and no more than seven lenses.