IMAGE PROJECTION SYSTEM WITH A POLARIZING BEAM SPLITTER

摘要

An image projection system (10) includes one or more wire grid polarizing beam sputters (14a-c, 28, 29) and one or more transmissive arrays (16a-c}. A polarized light beam from a light source (22) and pre-polarizer (26a-c) is directed towards the transmissive array which modulates the polarization of the polarized light beam by selectively altering the polarization of the polarized light beam to encode image information thereon and creating a modulated beam. The modulated beam is directed towards the wire grid polarizing beam sputter which acts as an analyzer to separate the modulated beam into reflected and transmitted beams. A screen (18) is disposed in one of the reflected or transmitted beams to display the encoded image information. The polarizing beam sputter is oriented at an angle with respect to the modulated beam such that the reflected beam is directed away from the transmissive array. A plurality of transmissive arrays can be used for different colors. One or more polarizing beam sputters (28, 29) can act as both analyzers and combiners.