An image projection system has a wire grid polarizing beam splitter which
functions as both the polarizer and the analyzer in the system. A light
source produces a source light beam directed at the beam splitter which
reflects one polarization and transmits the other. A liquid crystal array
is disposed in either the reflected or transmitted beam. The array
modulates the polarization of the beam, encoding image information
thereon, and directs the modulated beam back to the beam splitter. The
beam splitter again reflects one polarization and transmits the other so
that the encoded image is either reflected or transmitted to a screen.
The wire grid polarizing beam splitter is capable of being oriented at
various incident angles with respect to the source light beam and
modulated beam, and accepts relatively divergent light.