Top-Down Resin 3d Printer Idea

The idea is to use a pocket of air to keep the surface level of the resin constant throughout the build, guaranteeing consistent layer heights. In addition, the higher pressure might ease reflow of resin after dipping?

High print speeds might be possible if the pocket is filled with pure oxygen gas that inhibits resin hardening at the surface. The focus point of the projector should then be slightly below the surface of the resin. As the resin solidifies slightly below the surface and is pulled down by the platform, new resin flows in from all sides (ideally) undisturbed by the effect of surface tension.