While conventional mono-pixel FT-IR spectroradiometers offer unique performance such as higher spectral resolution and enhanced sensitivity over the instrument field of view (FOV), multi-pixel FT-IR hyperspectral imagers now extend possibilities in infrared characterization. They provide an accurate spatial characterization of a target’s signature by spatially resolving the essential characteristics over the observed scene.

The captured data is further exploited by combining the spectral and spatial information of the scene. As a result, an FT-IR imaging spectroradiometer has the unique capability of generating 3D images (2D images with spectral bands in the Z axis) providing a spectrum with every pixel of the mapped scene.

Schematized imaging Fourier transform spectroradiometer
MR-i hypercube measured at a single moment in time