About: http://webisa.webdatacommons.org/57838141

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	FIG. 2 is an illustration showing an alternate stereoscopic 3D projection system used in the prior art that uses the polarization-flipping device to alternate the polarization of light exiting the projector.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com