BiDi Screen: A Thin, Depth-Sensing LCD for 3D Interaction using Light Fields Supplementary Appendix
Matthew Hirsch, Douglas R. Lanman, Henry Holtzman, Ramesh Raskar · 2008
In this appendix we describe how to optimize the sensor-mask (or diffuser-mask) separation, for pinhole arrays and tiled-broadband codes. As with other light field cameras, the total number of samples (given by the product of the spatial and angular resolutions) cannot exceed the number of camera pixels. In our system the LCD discretization further limits the mask resolution, restricting the total number of light field samples to be approximately equal to the total number of pixels in the display (i.e., 1680×1050 pixels). Thus, as described in Section 6.1, we achieve a spatial resolution of 73×55 samples and an angular resolution of 19×19 samples with a pinhole or MURA tile spacing of dp = 4.92 mm and a mask separation of di = 2.5 cm. However, by adjusting the spacing and separation, the spatio-angular resolution trade-off can be adjusted.