OPTICAL LENS AND OPTICAL DEVICE

WIPO Patent Application WO/2021/042304

A1

Disclosed are an optical lens and an optical device, a lens group, a light splitting element, a light filtering element, and an imaging sensor. The light splitting element and the light filtering element are disposed between the lens group and the imaging sensor; the lens group comprises a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, and a fourth lens having a positive refractive power which are arranged from an object side to an image side along an optical axis; a focal length f1 of the first lens, a focal length f2 of the second lens, a focal length f3 of the third lens, and a focal length f4 of the fourth lens satisfy the following conditions: 1