Pavić, Ivan; Kaštelan, Nediljko; Adamczyk, Arkadiusz; Ivanda, Mile (2024) Enhancing Micro-Raman Spectroscopy: A Variable Spectral Resolution Instrument Using Zoom Lens Technology. Sensors, 24 (13). ISSN 1424-8220
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Abstract
Raman spectroscopy is a powerful analytical technique based on the inelastic scattering of photons. Conventional macro-Raman spectrometers are suitable for mass analysis but often lack the spatial resolution required to accurately examine microscopic regions of interest. For this reason, the development of micro-Raman spectrometers has been driven forward. However, even with micro-Raman spectrometers, high resolution is required to gain better insight into materials that provide low-intensity Raman signals. Here, we show the development of a micro-Raman spectrometer with implemented zoom lens technology. We found that by replacing a second collimating mirror in the monochromator with a zoom lens, the spectral resolution could be continuously adjusted at different zoom factors, i.e., high resolution was achieved at a higher zoom factor and lower spectral resolution was achieved at a lower zoom factor. A quantitative analysis of a micro-Raman spectrometer was performed and the spectral resolution was analysed by FWHM using the Gaussian fit. Validation was also performed by comparing the results obtained with those of a high-grade laboratory Raman spectrometer. A quantitative analysis was also performed using the ANOVA method and by assessing the signal-to-noise ratio between the two systems.
| Item Type: | Article | ||||||||
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| Uncontrolled Keywords: | Raman spectroscopy; high-resolution Raman spectrometer; zoom lens | ||||||||
| Subjects: | NATURAL SCIENCES > Physics TECHNICAL SCIENCES > Basic Technical Sciences > Materials |
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| Divisions: | Division of Materials Physics | ||||||||
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| Depositing User: | Ivana Vuglec | ||||||||
| Date Deposited: | 13 Oct 2025 08:37 | ||||||||
| URI: | http://fulir.irb.hr/id/eprint/9995 | ||||||||
| DOI: | 10.3390/s24134284 |
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