POLARISATION CONVERSION SYSTEM AND STEREOSCOPIC PROJECTION METHOD Russian patent published in 2014 - IPC G02B5/30 

FIELD: physics.

SUBSTANCE: system comprises a polarisation beam splitter, a polarisation rotator and a polarisation switch. The polarisation beam splitter is capable of transmitting first light beams with a first state of polarisation (SOP) on a first light beam path and reflect second light beams with a second SOP on a second light beam path. The polarisation rotator is placed on the second light beam path and is capable of converting the second SOP into the first SOP. The polarisation switch is capable of receiving first and second light beams on the first and second light beam paths, respectively, and time-modulating the state of polarisation of the first and second light beams into the first SOP at the output or the second SOP at the output.

EFFECT: high image brightness.

19 cl, 13 dwg, 1 tbl