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Spectral filtration of the IR images (review)

In the report the works devoted to methods and technique of a spectral thermal imaging are considered. For deriving the spectral images of objects are used as methods of an immediate optical filtration with the help of tunable spectral filters of different types (optical-acoustic, interference, interferential - polarization, filters on the basis of total interior reflection and other), and methods of selection of the spectral images grounded on mathematical handling of optical fields, recorded by a matrix photodetector (for example, after a Fourier-interferometer, holograms and other). The principles of spectral selection of the images and paths of build-up spectral thermal imagers are analyzed.