A digital micromirror device projection system employs an array of digitally operable micromirrors that are individually and selectively tiltable between ON and OFF positions. The array of mirrors is illuminated by a high intensity light source, and light reflected from those mirrors selectively driven...http://www.google.ca/patents/US5640479?utm_source=gb-gplus-sharePatent US5640479 - Fiberoptic face plate stop for digital micromirror device projection system
