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OPTO-IT
Spatial spectrum of coherence signal for a defocused object images in digital holographic microscopy with partially spatially coherent illumination
D. M. Klychkovaab, V. P. Ryabukhoab a Saratov State University, Saratov, Russia
b Institute of Precision Mechanics and Control of the Russian Academy of Sciences, Saratov, Russia
Abstract:
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 theory-based numerical results shows them to be in good agreement.
Keywords:
interference microscopy, digital holographic microscopy, imaging, numerical focusing, spatial spectrum of hologram, partial coherence, partially spatially coherent illumination.
Received: 28.03.2018 Accepted: 11.05.2018
Citation:
D. M. Klychkova, V. P. Ryabukho, “Spatial spectrum of coherence signal for a defocused object images in digital holographic microscopy with partially spatially coherent illumination”, Computer Optics, 42:3 (2018), 414–423
Linking options:
https://www.mathnet.ru/eng/co523 https://www.mathnet.ru/eng/co/v42/i3/p414
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Abstract page: | 149 | Full-text PDF : | 62 | References: | 20 |
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