Patent ID: 11860342
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 6:
7. An optical imaging system, comprising:
a first lens, a second lens, a third lens, a fourth lens having negative refractive power, a fifth lens having negative refractive power, a sixth lens, and a seventh lens, sequentially arranged from an object side,
wherein f3/f>1.5, where a focal length of the third lens is f3, and an overall focal length of the optical imaging system is f,
the sixth lens has a concave image-side surface in a paraxial region,
TTL/(2*Img HT)<0.7, where a distance on an optical axis from an object-side surface of the first lens to an imaging plane of an image sensor is TTL, and half of a diagonal length of the imaging plane of the image sensor is Img HT,
Fno<1.9, where an F-number of the optical imaging system is Fno,
−2.0<f2/f3<0, where a focal length of the second lens is f2, and a focal length of the third lens is f3, and
f6/f>0, where a focal length of the sixth lens is f6, and an overall focal length of the optical imaging system is f.