An optical filtering structure comprising a stack of layers forming a first filter letting pass a first spectral band, and a second filter adjacent to the first filter and which lets pass a second spectral band comprising: a plurality of dielectric layers common to the two filters and of different refractive indices, n first metal layers common to the two filters, m second metal layers arranged only in the second filter, and wherein at least one of said dielectric layers comprises, in the first filter, a thickness different to that in the second filter, and/or wherein at least one dielectric layer is arranged only in the second filter, n being an integer greater than or equal to 0, and m being an integer greater than or equal to 1.