Computational superposition projector for extended depth of field and field of view.

This Letter describes a projection system with extended depth of field (DOF) and field of view (FOV). In the proposed system, an input image is projected with varying focusing distances and optical axis directions, and the projected images are superposed on a three-dimensional screen to realize a three-dimensionally space-invariant point spread function (PSF). A target image is deconvolved, and the result is used as the input image before projection by using the superposed PSF to generate a sharp output image on the screen. This concept for extended-DOF and -FOV projection was demonstrated experimentally.