They are retroreflective - much more efficient reflectors than normal projection screens. Similar to material used for highway signs and reflective tape used on various clothing apparel, etc. ~ andy
David Dyer-Bennet wrote:
Um, what is the special property of the screens used for rear projection? http://people.rit.edu/andpph/a-tests/FINAL-SpeFex-2009-10-exam-winter-V2.htm
