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Optical diffraction tomography of 3D microstructures using a low coherence source
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DOI：10.1364/OE.454910.png)
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Optical diffraction tomography (ODT) is a label-free technique for three dimensional imaging of micron-sized objects. Coherence and limited sampling of 3D Fourier space are often responsible for the appearance of artifacts. Here we present an ODT microscope that uses low temporal coherence light and spatial light modulators to retrieve reliable 3D maps of the refractive index. A common-path interferometer, based on a spatial light modulator, measures the complex fields transmitted by a sample. Measured fields, acquired while scanning the illumination direction using a digital micro-mirror device, are fed into a Rytov reconstruction algorithm to obtain refractive index maps whose accuracy is directly evaluated on microfabricated 3D test objects. Even for challenging shapes such as pyramids, bridges, and dumbbells, we obtain volumetric reconstructions that compare very well with electron microscopy images. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
Keyword:
REFRACTIVE-INDEX
MICROSCOPY
INTENSITY
CELLS
期刊
IF:
3.3
论文数:
6.1W
被引数:
14.3W
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