SWIR (Short-Wave Infrared) refers to a region of the infrared spectrum, typically defined as wavelengths from about 1000nm to 1700nm, though some definitions extend up to 2500nm.

SWIR (Short-Wave Infrared) is part of the infrared spectrum with longer wavelengths then NIR (IR).

The visible spectrum ranges roughly from 400–700nm. SWIR lies beyond Near-Infrared (NIR) and requires specialized imaging sensors to detect.