title: Lossless light projection.
abstract: A new technique for energy-preserving phase-only light projection is demonstrated. The phase-only encoding is based on an extension of the Zernike phase-contrast method into the domain of full-range [0; 2pi ] phase modulation, breaking the usual small-phase-angle limitation. Controlling the spatial average value of the input-phase pattern and choosing appropriate phase retardation at the phase-contrast filter yield pure-phase-based image formation. Experimental results demonstrate close to 90% energy efficiency. Output intensity levels with magnitudes more than 3.5times that of the input intensity level were measured in the brightest regions of the projected images.
authors.forename: J
authors.initials: J
authors.lastname: Glückstad
authors.forename: L
authors.initials: L
authors.lastname: Lading
authors.forename: H
authors.initials: H
authors.lastname: Toyoda
authors.forename: T
authors.initials: T
authors.lastname: Hara