Rotating mirror short-wave infrared hyperspectral imaging system: characterization and applications

Abstract

Hyperspectral imaging (HSI) is a powerful analytical tool with broad applicability across diverse fields, including agriculture, biomedicine, and industry. This article introduces a new custom hyperspectral device that operates in the SWIR (Short-Wave InfraRed) range (900-1700 nm). Based on a previously tested design featuring a rotating mirror, this device opens new possibilities for the physicochemical characterization of tissues and materials. This equipment provides up to 5 nm spectral resolution and 176.8 × 111.36 μm2 spatial resolution, without moving the equipment or the sample. Key features of the device are detailed, and a dual validation method is presented: using reference spectra to their concentrations and using reference concentrations to estimate their spectra. Validation is carried out through the quantitative analysis of liquid mixtures and the qualitative analysis of biological specimens. The proposed HSI system extends the capabilities of the technique into the SWIR range, offering strong potential for its application in diverse biomedical and industrial scenarios.