An electro-optical projection system includes a polarizer, a reflective light modulator, an analyzer, and a compensation element. The polarizer polarizes an illumination beam to form a polarized illumination beam. The reflective light modulator receives the polarized illumination beam along a first optical...http://www.google.com.au/patents/US7559655?utm_source=gb-gplus-sharePatent US7559655 - Optical system with angular compensator
