Patent ID: 9395549
Filing Date: 2016-07-19
CPC Classification: G02B,H04N

Claim Text:
1. A dual projection system for projecting a stereoscopic three dimensional image on the surface of a projection screen, comprising: a first projector configured to generate a left-eye image beam; a second projector configured to generate a right-eye image beam; a first beam-splitting element positioned in front of said first projector to split said left-eye image beam into a primary left-eye image beam with a first optical linear polarization state and two secondary left-eye image beams, each with a second optical linear polarization state; a second beam-splitting element positioned in front of said second projector to split said right-eye image beam into a primary right-eye image beam with said first optical linear polarization state and two secondary right-eye image beams, each with said second optical linear polarization state; a first optical quarter waveplate device configured to receive the primary left-eye image beam and two secondary left-eye image beams and to convert their optical linear polarization states to a first circular polarization orientation for projection onto the surface of a projection screen; a second optical quarter waveplate device configured to receive the primary right-eye image beam and two secondary right-eye image beams and to convert their optical linear polarization states to a second circular polarization orientation for projection onto the surface of a projection screen; and wherein said first circular polarization orientation is orthogonal to said second circular polarization orientation.