An Autostereoscopic Projector Array Optimized for 3D Facial Display - With Audio

Our display is built from off-the-shelf components. Our projector array system consists of 72 Texas Instruments DLP Pico projectors each of which has 480x320 resolution. Our projectors are spaced along a 124cm curve with a radius of 60cm. We removed the cases and built custom mounts to place the projectors just 14mm apart with a 4mm lens. The projectors are all aimed at a 30cm x 30cm vertically anisotropic screen. The ideal screen material should have a wide-vertical diffuse lobe so the 3D image can be seen from multiple heights and narrow horizontal diffusion to preserve horizontal divergence. We use the horizontal cylindrical ridges of a plastic 40 line-per inch lenticular screen to scatter the light from each projector lens as a vertical strip of light. To eliminate any gaps between stripes, we add a 1º horizontal by 60º vertical light-shaping diffuser sheet from Luminit. The total width of the horizontal diffusion should be equal to the angle between projectors. Our setup provides a high angular resolution of 1.66 degrees between views, achieving not only binocular stereo but also compelling motion parallax.

http://gl.ict.usc.edu/Research/PicoAr...

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