An extended depth-of-eld projection method using a high-speed projector with a synchronized oscillating variable focus lens

摘要

An extended depth-of-field projection is needed for spatial augmented reality. However, conventional projectorsare often designed with a small F/#, which causes a narrow depth-of-field. This paper presents a new systemconsisting of a variable focus optical path and 1000-fps 8-bit high-speed projector. This system oscillates the focallength of the lens at high speed and synchronizes it with the projection. High speed performance contributes toproject clear images even under the oscillated focal length and to realize all-in-focus projections on more than10 targets at dierent depths.