Intrinsic geometric distortions in a type of multi-projector light field display

We consider a class of projector-based light field 3D displays (horizontal parallax only) that use reflective or refractive anisotropic diffusers, and analyze the implications that at slated projection the light spreading is not in an ideally vertical plane, but instead is shaped like a cone. We demonstrate how this causes geometric distortions, some of which can be corrected by proper choice of projected images, while others, which we call intrinsic distortions, cannot. We show how the amount of distortion can be quantified by angular deviations, which are independent of the reproduced 3D scene, and present some of its properties. Ray-tracing simulations of these displays are shown to demonstrate the important results.