Stereo projection optical system

An optical system for use in a stereo projector, the optical system comprising:

• a light source assembly configured for emitting three time-sequenced primary color lights;
• a first polarized beam splitter positioned to receive the color lights and configured for separating the color lights into a first polarized light and a second polarized light, a polarization direction of the first polarized light being orthogonal to that of the second polarized light;
• a first transmission-type spatial light modulator positioned to receive the first polarized light, allowing the first polarized light passing therethrough, and configured for modulating the first polarized light with corresponding spatial information, the polarization direction of the modulated first polarized light being rotated to that of the second polarized light;
• a second transmission type spatial light modulator positioned to receive the second polarized light, allowing the second polarized light passing therethrough, and configured for modulating the second polarized light with corresponding spatial information, the polarization direction of the modulated second polarized light being rotated to that of the first polarized light;
• a second polarizing beam splitter positioned to receive and configured for combining the modulated first polarized light and the modulated second polarized light;
• and
• a projection lens positioned to receive and configured for projecting the combined modulated first and second polarized lights.