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Related Experiment Video

Updated: Aug 15, 2025

Author Spotlight: Unveiling the Potential of VSFG Microscopy in Studying Mesoscopically Heterogeneous Self-Assembled Structures

Author Spotlight: Unveiling the Potential of VSFG Microscopy in Studying Mesoscopically Heterogeneous Self-Assembled Structures

Published on: December 1, 2023

Diffraction-limited hyperspectral mid-infrared single-pixel microscopy.

Alexander Ebner¹, Paul Gattinger², Ivan Zorin²

¹RECENDT - Research Center for Non-Destructive Testing GmbH, 4040, Linz, Austria. alexander.ebner@recendt.at.

Scientific Reports

|January 7, 2023

Summary

This summary is machine-generated.

This study introduces a novel hyperspectral mid-infrared microscope using single-pixel imaging. It achieves fast, label-free chemical imaging of samples like red blood cells with high spatial and spectral resolution.

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Area of Science:

Optics and Photonics
Spectroscopy
Biomedical Imaging

Background:

Mid-infrared (MIR) microscopy is crucial for label-free chemical imaging.
Traditional hyperspectral imaging often requires complex optical setups.
Single-pixel imaging (SPI) offers an alternative approach for efficient data acquisition.

Purpose of the Study:

To demonstrate a wide-field hyperspectral MIR microscope utilizing multidimensional SPI.
To leverage a digital micromirror device (DMD) for simultaneous spatial and spectral differentiation in the MIR region.
To enhance sample throughput for chemical and biomedical imaging applications.

Main Methods:

Employed a high-brightness MIR supercontinuum source for broadband illumination.
Utilized a digital micromirror device (DMD) extended into the MIR for wavelength selection and spatial masking.
Implemented Hadamard sampling for efficient data acquisition and reconstruction.

Main Results:

Achieved a spatial resolution of 4.92 µm at 4.15 µm wavelength with native spectral resolution < 118.1 nm.
Demonstrated label-free chemical imaging of polymer compounds and red blood cells.
Acquired and reconstructed 64x64 images in 450 ms and 162 ms, respectively, showcasing high sample throughput.

Conclusions:

The developed hyperspectral MIR microscope based on SPI offers a flexible and efficient platform for chemical and biomedical analysis.
The DMD's dual role in spatial masking and spectral dispersion eliminates the need for external dispersive elements.
The system's tunable field of view and adjustable spatial resolution significantly improve sample throughput.