An electro-optical patternable mask is provided which is controllable by way of a processor for presenting a variety of patterns to electromagnetic radiation. In one embodiment of the mask, the electro-optical mask includes an electrochromic layer that works in conjunction with deposited electrode layers...http://www.google.com/patents/US6464692?utm_source=gb-gplus-sharePatent US6464692 - Controllable electro-optical patternable mask, system with said mask and method of using the same
