Semi-analytical angular spectrum method in lensless digital inline holography: effects on resolution and detection of microparticles

Pablo Etchepareborda, Paul Connolly, Jan Henneberger, Jonathan Crosier

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A Semi-Analytical Angular Spectrum Method (SAASM) is introduced for the reconstruction process of lensless digital in-line holography with spherical wave illumination. This approach solves a distortion issue in the reconstructed field that emerges when the conventional, Angular Spectrum Method with planar reconstruction wave (ASM-PRW), method is used for high numerical aperture setups. The performance of the proposed approach is compared against ASM-PRW. The benefits of SAASM in terms of resolved limit and detection efficiency of small particles near the detection limit are shown using holograms containing simulated particles, suspended glass beams of known diameter and dry pollens.

Original languageEnglish
Title of host publicationUnconventional Imaging and Adaptive Optics 2022
EditorsJean J. Dolne, Mark F. Spencer
PublisherSPIE
ISBN (Electronic)9781510654624
DOIs
Publication statusPublished - 2022
EventUnconventional Imaging and Adaptive Optics 2022 - San Diego, United States
Duration: 23 Aug 202224 Aug 2022

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume12239
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceUnconventional Imaging and Adaptive Optics 2022
Country/TerritoryUnited States
CitySan Diego
Period23/08/2224/08/22

Keywords

  • autofocusing
  • Digital lensless holographic microscopy
  • high-resolution 3D imaging
  • particle detection
  • Semi-analytical Angular Spectrum Method
  • wave propagating method

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