Image Credit: Horiba | Resonon
Imaging Spectrometers are instruments used in hyperspectral imaging and imaging spectroscopy to acquire spectrally resolved images.
What is Imaging Spectroscopy?
Spectroscopy is used to detect individual absorption features of specific chemical bonds in a solid, liquid, or gas and can be used to detect every material. Imaging spectroscopy is the application of reflectance/emittance spectroscopy to every pixel in a spatial image. Spectral imaging separates each color at each point in an image. This allows for the various substances that absorb and reflect light to be identified for precise, non-destructive analysis of the material.
Imaging Spectroscopy. Image Credit: Cossa Earth Observation Centre
The actual detection is dependent on several factors: the spectral coverage, spectral resolution, and signal-to-noise of the spectrometer. Detection is also dependent on material properties such as amount of material and strength of absorption features in the wavelength region measured.
Spectroscopy is an important tool to use in order to detect material types in laboratories on hand samples, in the field, from an aircraft, and someday from satellites. Imaging spectroscopy can also be used medical imaging.