Open AccessSpatial spectrum of coherence signal for a defocused object images in digital holographic microscopy with partially spatially coherent illumination
Author(s) -
D. Klychkova,
Vladimir P. Ryabukho
Publication year - 2018
Publication title -
kompʹûternaâ optika
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.491
H-Index - 29
eISSN - 2412-6179
pISSN - 0134-2452
DOI - 10.18287/2412-6179-2018-42-3-414-423
Subject(s) - optics , holography , coherence (philosophical gambling strategy) , digital holographic microscopy , physics , spatial coherence , digital holography , spatial frequency , scattering , signal (programming language) , coherence theory , transmission (telecommunications) , point (geometry) , laser , coherence length , computer science , mathematics , geometry , telecommunications , superconductivity , quantum mechanics , programming language
We study the effect of a decrease in the magnitude of the coherence signal in high-frequency spatial spectrum for a defocused object image in transmission digital holographic microscopy with quasimonochromatic partially spatially coherent illumination. A theoretical description and results of the numerical simulation of the effect for a point scattering object are presented. The effect is experimentally studied by illuminating layered quasi-point scatterers with partially spatially coherent laser light obtained using a moving scatterer. The comparison of the experimental and theorybased numerical results shows them to be in good agreement.