Recent development of a UV Raman microscope explosive detection system for near trace detection

Waterbury, Robert D.; Conghuyentonnu, Thuyan; Hardy, Hunter; Molner, Tim; Vunck, Darius

doi:10.1117/12.2519596

Cited by 1 publication

(1 citation statement)

References 5 publications

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“…2 By analyzing the parameters, such as peak position, peak intensity, and peak width in Raman scattering spectra, information on molecular chemical bond vibrations and rotations of the test target can be obtained, which can effectively determine the composition and structure of substances. Due to the advantages of rapidity and non-destructiveness, Raman spectroscopy (RS) has been widely used in various fields, such as food safety, 3,4 hazardous material identification, 5,6 art authentication, 7 geological exploration, 8 biomedical research, 9 materials preparation, 10 and planetary exploration. 11,12 Spatial heterodyne spectroscopy (SHS) is a Fourier transform-based spectroscopic detection technique that has rapidly developed since the 1990s.…”

Section: Introductionmentioning

confidence: 99%

Design and evaluation of spatial heterodyne Raman spectrometer at 785 nm excitation wavelength

Bai,

Luo,

et al. 2024

Opt. Eng.

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Raman spectroscopy has emerged as an essential technique for material composition analysis due to its noncontact, nondestructive, and rapid characteristics. Spatial heterodyne spectroscopy offers the advantages of high stability, high throughput, and ultra-high spectral resolution, making it particularly suitable for Raman spectroscopic detection. The main design parameters of a spatial heterodyne Raman detection system were determined under near-infrared wavelength excitation: a Raman shift detection range of 300 to 2000 cm −1 and a spectral resolution of 5 cm −1 at an excitation wavelength of 785 nm. The optical design of the dispersion module and imaging module was completed. Test results demonstrate that the spectrometer achieves a spectral resolution of 5.33 cm −1 and can detect Raman shifts in the range of 315 to 2131.6 cm −1 . Verification tests on cyclohexane and lipstick samples confirm that the system exhibits excellent fluorescence suppression capability, with a signal-to-noise ratio of the cyclohexane Raman peak reaching 1600.8.

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