Infrared (IR) Spectrum

The wavelength interval of the electromagnetic spectrum that corresponds to infrared light (light that is beyond the visible red range). IR radiation is often divided into three smaller regions: 0.750 - 3μm, 3 - 30μm, and 30 - 1000μm – defined as near-infrared (NIR), mid-wave infrared (MWIR), and far-infrared (FIR), respectively.