A reflector having a mechanically deformable portion of at least one reflective surface is disclosed. By deforming the portion of the reflective surface, discontinuity is introduced in that portion of the reflective surface. The discontinuity in the reflective surface scatters incident radiation signals so as to cause attenuation in the reflected signal. By selectively deforming the portion of the reflective surface, the reflected signal can be modulated to encode data thereon. The mechanically deformable portion of the reflective surface preferably comprises plates integrally formed therein.
Modulatable reflectors and methods for using same
Roberson, M., Rinne, GA., Deane, PA., & Markus, KW. (2000). IPC No. U.S. Modulatable reflectors and methods for using same. (Patent No. 6137623).