Patent ID: 7878656

Claim:
A stereo projection optical system, comprising: a first polarizing beam splitter configured for splitting an incident light beam into a first polarized light component and a second polarized light component which is substantially orthogonal to the first polarized light component; a transmission-type light modulator positioned to receive the first polarized light component of the first polarizing light splitter, the transmission-type light modulator switchably operating between a dark state and a bright state in turn, wherein in the dark state, the transmission-type light modulator directly transmits the first polarized component, and in the bright state, the transmission-type light modulator converts the first polarized light component into the second polarized light component and emitting the second polarized light component; an image assimilator positioned to receive an emergent light of the transmission-type light modulator and comprising a second polarized light splitter, a first reflective spatial light modulator, and a second reflective spatial light modulator, wherein the first polarized light component output from the transmission-type light modulator in the bright state passes through the second polarizing beam splitter and reaches the first reflective spatial light modulator, the first reflective spatial light modulator converts the first polarized light component into the second polarized light component and superimposes spatial information on the second polarized light component and emits the second polarized light component, and wherein the second polarized light component output from the transmission-type light modulator in the dark state passes through the second polarizing beam splitter and reaches the second reflective spatial light modulator, the second reflective spatial light modulators converts the second polarized light component into the first polarized light component and superimposes spatial information on the first polarized light component and emits the first polarized light component.