475004_Visualization1.mp4

Abstract

Animation of the quasi-CVT optimization process for an example Voronoi-Fresnel phase with 23 cells. The distance between the Voronoi-Fresnel phase and image sensor is set at 2 mm. The sensor pixels are 240 x 160, with a pixel pitch of 3.45 microns. The phase resolution is 1.15 microns, making a manufacturable 3x unsampling ratio compared with sensor resolution. To fully characterize the optimization, the process is run for 100 iterations, although the optimal result occurs in the early few iterations. (1) The phase profile at current iteration. (2) The generated PSF (shown in the square-root scale) at current iteration. (3) The MTF (shown in log scale) at current iteration. (4) The current optimal cell distribution with the maximum MTFv. Optimal result preserves both uniform and irregularity of the cells