The last special issue we did on light fields, back in July/ August 2016, provided an overview and update on light-field displays. We divided these into two categories -displays for group viewing and displays for personal use (head-mounted displays, or HMDs) - because of the distinctly different challenges and trade-offs in a display meant for many users to view simultaneously, vs. just one. In either case, the objective was to present a representation of "the light field," the radiance that emanates from every point in the world and is visible to the human eye.
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