Generally, the present invention relates to an apparatus for reducing astigmatism in a projection system that is particularly well suited to reducing astigmatism in LCD projection systems. A projection system includes a light source to generate light, conditioning optics to condition the light from the...http://www.google.com.au/patents/US7329006?utm_source=gb-gplus-sharePatent US7329006 - Projection system having low astigmatism
