Focusless hand-held proximal Raman detection and two-dimensional mapping of explosives

Eric R. Languirand; G. Amalthea Trobare

doi:10.1117/12.2662856

14 June 2023 Focusless hand-held proximal Raman detection and two-dimensional mapping of explosives

Eric R. Languirand, G. Amalthea Trobare

Proceedings Volume 12541, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXIV; 125410A (2023) https://doi.org/10.1117/12.2662856
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States

Abstract

Raman sensing and mapping techniques traditionally use a tightly focused laser beam to incite and collect Raman scattered photons. A large amount of energy is typically focused in a very small (micron-sized) area potentially resulting in photo-induced damage and can be not eye-safe. In addition, when using a focused-based laser system, scanning a large area is time consuming due to the small area of interrogation and must be done at a specific distance. Therefore, either prior knowledge of the sample location (in three dimensions) is necessary, or a smaller area must be scanned. In this work, we demonstrate a hand-held proximal Raman detection instrument that uses a non-focused laser beam to interrogate a larger area. This reduces the time it takes to map a surface and provides greater flexibility in targeting the area to interrogate. Herein, we show detection and mapping of explosives in two dimensions with this hand-held proximal Raman instrument as well distance dependence of this non-focused instrument with explosive materials.

Conference Presentation

Citation Download Citation

Eric R. Languirand and G. Amalthea Trobare "Focusless hand-held proximal Raman detection and two-dimensional mapping of explosives", Proc. SPIE 12541, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXIV, 125410A (14 June 2023); https://doi.org/10.1117/12.2662856

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