Full field-of-view digital lens-free holography for weak-scattering objects based on grating modulation

TitleFull field-of-view digital lens-free holography for weak-scattering objects based on grating modulation
Publication TypeJournal Article
Year of Publication2018
AuthorsW Zhang, L Cao, G Jin, and D Brady
JournalApplied Optics
Volume57
Issue1
Start PageA164
PaginationA164 - A171
Date Published01/2018
Abstract

© 2018 Optical Society of America. Grating-based single-shot digital lens-free holography with spatial spectral multiplexing is proposed to realize full field-of-view (FOV) imaging for weak-scattering objects. Multiple object waves are generated by a one-dimensional grating that is placed in near contact with the object to avoid the cross talk among different diffraction orders during reconstruction. A multiplexed off-axis hologram is created by interference between the object waves and reference wave and captured by an image sensor in one shot. Multiple imaging areas corresponding to the captured object waves can be simultaneously retrieved during reconstruction. A formula which guarantees full FOV imaging without cross talk or information loss is presented. The imaging experiments of a USAF resolution target are presented to demonstrate the feasibility of this method.

DOI10.1364/AO.57.00A164
Short TitleApplied Optics