SWIRBilder
SWIRBilder, or short-wave infrared imaging, refers to images captured in the short-wave infrared portion of the spectrum, approximately 1.0 to 2.5 micrometers. These images are produced by cameras that use SWIR-sensitive detectors, most commonly indium gallium arsenide (InGaAs). Some systems extend into about 2.6 micrometers with specialized materials, and others use detectors such as mercury cadmium telluride (MCT) for longer wavelengths. Because standard silicon cameras do not respond to SWIR, SWIR cameras are typically cooled to reduce dark current and noise, though uncooled variants exist.
Imaging can be passive, relying on ambient SWIR illumination (for example daylight), or active, using infrared
Applications include security and surveillance, automotive and aviation for night vision and driver assistance, and industrial
Limitations involve higher cost and limited availability compared with visible cameras, the need for cooling and