Systems and techniques are provided for imaging with a meta-lens. For instance, a process can include receiving light at a first substrate, the first substrate comprising a first meta-lens; receiving a first portion of the light at a second substrate, the second substrate including an optical sensor, wherein: the optical sensor is directly covered by a solid covering, and the first substrate is mechanically coupled to the second substrate such that the solid covering is between the first substrate and the second substrate; and receiving, by the optical sensor and through the solid covering, at least a second portion of the light focused by the first meta-lens.