A compact UV hyperspectral imager can be designed with an acousto-optic tunable filter (AOTF) installed in front of an enhanced CCD camera. Tellurium dioxide is the most commonly used crystal for AOTFs from 0.4 to . We conducted an experiment to determine the UV spectral response of an imaging AOTF in tandem with a known KDP AOTF and obtained good-quality hyperspectral images by using the filter down to 365 nm. We compared the performance of the filter-based hyperspectral imager with an imager based on a KDP filter because currently the latter is the best available material for the UV, and we found the performance of the imager in the range 355–480 nm to be superior to that of a KDP imager. We present our experiments and the results obtained.
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