Two-color liquid crystal light valve image projection system with color selective prepolarizers in single optical tank

摘要: This invention provides a unitary oil coupled optical arrangement for color selective prepolarization of the light incident upon two valves. The is immersed within single tank. It includes dichroic filters which act on polarized from source has been into beams by passing through and being reflected prepolarizing thin film stack. first filter polarization while second polarization. each then combined beam polarization-selective combiner prior to applied main polarizing prism. prism passes valve in conventional manner. Each operates accordance with presence writing input cathode ray tube. output projection lens