SPATIAL SPECTRUM OF COHERENCE SIGNAL FOR A DEFOCUSED OBJECT IMAGE IN DIGITAL HOLOGRAPHIC MICROSCOPY WITH PARTIALLY SPATIALLY COHERENT ILLUMINATION

被引：0
|
作者：
Klychkova, D. M. [1 ,2 ]
Ryabukho, V. P. [1 ,2 ]
机构：
[1] Russian Acad Sci, Inst Precis Mech & Control, Lab Problems Coherent Opt Measurements Precis Mec, Saratov, Russia
[2] Saratov NG Chernyshevskii State Univ, Opt & Biophoton Dept, Saratov, Russia
来源：
COMPUTER OPTICS | 2018年 / 42卷 / 03期
基金：
俄罗斯科学基金会;
关键词：
interference microscopy; digital holographic microscopy; imaging; numerical focusing; spatial spectrum of hologram; partial coherence; partially spatially coherent illumination;
D O I：
10.18287/2412-6179-2018-42-3-414-423
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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.
引用
收藏
页码：414 / 423
页数：10
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