hmm maybe its not the same with 3d glasses, ive seen their patent and they claim it to be Deep-Enhancing Screen

http://www.faqs.org/patents/app/20090097113

Quote:The present disclosure relates to a depth-enhancing screen for producing a simulated 3D image. The screen comprises a multi-curved Fresnel lens which when viewed in cross-section along the or each longest line linking two points on the edge of the lens, has a curved cross-section with an apex in the central region of the lens, and wherein each end of the curve flattens before it reaches the edge of the lens.