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

doi:10.1117/12.2642760

4 October 2022 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

Author Affiliations +

Proceedings Volume 12239, Unconventional Imaging and Adaptive Optics 2022; 122390N (2022) https://doi.org/10.1117/12.2642760
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

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.

Conference Presentation

Citation Download Citation

Pablo Etchepareborda, Paul Connolly, Jan Henneberger, and Jonathan Crosier "Semi-analytical angular spectrum method in lensless digital inline holography: effects on resolution and detection of microparticles", Proc. SPIE 12239, Unconventional Imaging and Adaptive Optics 2022, 122390N (4 October 2022); https://doi.org/10.1117/12.2642760

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