A wafer-level lens system includes one or more wafer-level lenses, each of the one or more wafer-level lenses having a substrate with opposing first and second surfaces, a first lens element of a first material and disposed on the first surface, and a second lens element of a second material and disposed on the second surface, wherein, for at least one of the one or more wafer-level lenses, the first material is different from the second material. Another wafer-level lens system includes three wafer-level lenses optically coupled in series with each other, each of the three wafer-level lenses having a substrate with opposing first and second surfaces, a first lens element disposed on the first surface and having an aspheric surface facing away from the first surface, and a second lens element disposed on the second surface and having an aspheric surface facing away from the second surface.