| Autor: |
Claudia Ravasio, Luca Teruzzi, Mirko Siano, Llorenç Cremonesi, Bruno Paroli, Marco A.C. Potenza |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
HardwareX, Vol 19, Iss , Pp e00569- (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2468-0672 |
| DOI: |
10.1016/j.ohx.2024.e00569 |
| Popis: |
We propose a compact, portable, and low-cost holographic microscope designed for the characterization of micrometric particles suspended in a liquid. This system is built around a commercial optical microscope by substituting its illumination source (a light-emitting diode) with a collimated laser beam. Similarly, a quartz flow cell replaces the microscope glass slide using a 3D-printed custom mount. With the hardware presented in this paper, the holographic imaging of the electromagnetic fields emitted by the particles that intercept the laser beam achieves a resolution close to that of optical microscopes but with a greater depth of field. Several morphological and optical features can be extracted from the holograms, including particle projected section, aspect ratio, and extinction cross-section. Additionally, we introduce a remote system control that enables users to process the acquired holograms on a remote computational device. This work provides a comprehensive description of the methodology of image processing in holographic microscopy and a series of validation measurements conducted using calibrated particles. This technique is suitable for the characterization of airborne particles found in snow, firn, and ice; here we report experimental results obtained from Alpine ice cores. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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