Super‐short‐focus front projector with aspheric‐mirror projection optical system

— We have developed a new front projector with a super-short projection distance of 0.65 m at 100 in. We installed a newly developed reflective-type projection optical system in this projector, which was composed of only four aspheric mirrors that were free of color aberrations. Using this new system and a single-chip DMD™, we projected a picture that had excellent sharpness and high contrast from 40 to 100 in. This paper describes the principles, design, and characteristics of the new WT600™ front projector.