Multispectral imaging technology holds significant promise in the field of thermal imaging applications, primarily due to its unique ability to provide comprehensive two-dimensional spectral data distributions without the need for any form of scanning. This paper focuses on the development of an accessible basic design concept and a method for estimating temperature maps using a four-channel spectral imaging system. The research examines key design considerations and establishes a workflow for data correction and processing. It involves preliminary camera calibration procedures, which are essential for accurately assessing and compensating for the characteristic properties of optical elements and image sensors. The developed method is validated through testing using a blackbody source, demonstrating a mean relative temperature error of 1%. Practical application of the method is demonstrated through temperature mapping of a tungsten lamp filament. Experiments demonstrated the capability of the developed multispectral camera to detect and visualize non-uniform temperature distributions and localized temperature deviations with sufficient spatial resolution.

We demonstrate the possibility of the quantitative multielement analysis of a composite wear-resistant coating (tungsten carbide particles in chromium̵

Three dimensional multielemental mapping of composite wear resistant by laser induced breakdown spectroscopy has been demonstrated for the first time. Individual clads of 1560 nickel alloy reinforced with tungsten carbide were synthesized by co-axial laser cladding technique. Electron energy X-ray dispersive spectroscopy revealed elemental maps for major elements (W, Ni, Co, Cr, Fe, Si) but failed to measure carbon. Laser induced breakdown spectroscopy was utilized for elemental mapping of carbon and all other elements under interest. It was demonstrated that for depths beyond few microns three dimensional elemental profiling requires substantial laser spot overlapping in order to achieve ±2 μm accuracy of depth measurements. Elemental maps for nickel, tungsten and carbon were quantified for 900x900x45 μm volume with 30 μm lateral and 4 μm depth resolution in case of tungsten carbide particles in nickel alloy.