According to one aspect, the invention relates to an angular optical filtering element (εi) optimised for angular filtering about a given operating angle of incidence (θi, 1) in a given spectral band. The angular filtering element (εi) comprises a first nanostructured, band-pass, spectral filter (11i, 301) and a second nanostructured, band-pass, spectral filter (12i, 302). Each of the first and second spectral filters comprises, respectively, in said spectral band, a first and a second central filtering wavelength that respectively has a first and second angular dispersion curve defined depending on the angle of incidence (θinc) on the optical filtering element (εi), the curves of angular dispersion being secant about the operating angle of incidence (θi, 1) of the optical filtering element. The invention applies to the production of a selective angular filtering device and to a multidirectional optical detection system.