Color Holograms with 64x increased Etendue! We have a new holography paper in
@NaturePortfolio with my student at Princeton
@_EthanTseng_ leading the effort together
@SeungHwanBaek8 and the folks at Meta Research. We expand (that is, increasing the field of view and/or eyebox of holographic near-eye displays to useable ranges) by putting an engineered diffuser in the path of the display. We optimized the phase pattern of a diffractive optical element (shown in the photo below) to allow for even larger expansion factors while retaining similar contrast in the resulting hologram.
Paper:
light.princeton.edu/publicat…
Authors: Ethan Tseng, Grace Kuo, Seung-Hwan Baek, Nathan Matsuda, Andrew Maimone, Florian Schiffers, Praneeth Chakravarthula, Qiang Fu, Wolfgang Heidrich, Douglas Lanman, and myself.
More information in this blog post from Princeton:
engineering.princeton.edu/ne…