Even on moonless but starlit nights, highly sensitive InGaAs cameras are able produce good images. By thinning the image sensor chip and with illumination right through the substrate, the wavelength range of the detectors can be extended into the visible spectrum to span 400-1700 nm. Together with uncooled microbolometer arrays for long wavelength infrared, this allows for the design of universal analysis tools that can take advantage of the fusion of optical and thermal images.
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