A new and promising technique for industrial applications is the use of near and short wavelength infrared light (NIR and Swir) to obtain information that is not visible to the human eye. In many cases, the information acquired at these wavelengths complements data from the visible spectrum (350 to 750 nm). This article defines that NIR wavelengths are in the range of 750 to 900 nm and Swir wavelengths are in the range of 900 to 2,500 nm.
