Multisource Holography
Date:Dec 2023
Teams:Reality Labs Research
Writers:Grace Kuo,Florian Schiffers,Douglas Lanman,Oliver Cossairt,Nathan Matsuda
Abstract
Holographic displays promise several benefits including high quality 3D imagery, accurate accommodation cues, and compact form-factors. However, holography relies on coherent illumination which can create undesirable speckle noise in the final image. Although smooth phase holograms can be speckle-free, their non-uniform eyebox makes them impractical, and speckle mitigation with partially coherent sources also reduces resolution. Averaging sequential frames for speckle reduction requires high speed modulators and consumes temporal bandwidth that may be needed elsewhere in the system.