Polarizing type stereo projector engine

The present invention discloses a stereoscopic projection light polarized machine engine, comprising a light source assembly, a beam / combined light path system, a projection lens; a light beam emitted by the light source assembly the spectral inlet / combiner system light path incident on the beam splitter / combiner optical optical system, the beam splitter / combiner system is modulated into the light path polarization perpendicular to the polarization beam enters the projection lens, the light source assembly includes a first light source, second light source, a first polarization beam splitter, a first transmission line P- polarized polarizing plate, polarizing plate and a second transmission line S- polarized light; a light beam passes through the first beam of the first light emitted from the polarizer transmits the first line of the first inlet enters the first polarization beam splitter, a second light emitted after the second line from the second inlet polarizer enters the first polarization beam splitter, a first polarization beam splitter output light is incident from the spectroscopic inlet / combiner system light path. The present invention can improve the contrast of the image projection apparatus a polarization stereoscopic fundamentally.