A deformable reflective surface is disclosed that may be used with a retroreflector to provide a modulated retroreflector. The modulated retroreflector may be used in communication systems such as optical laser communication systems wherein an incident beam is reflected back to the source, as modulated...http://www.google.se/patents/US7929195?utm_source=gb-gplus-sharePatent US7929195 - MEMS based retroreflector
