The preferred term for the shorter wavelengths in the infrared region extending from about 0.7 µm (visible red) to about 3 µm. The longer wavelength end grades into the middle infrared. Sometimes called solar infrared, as it is only available for use during the daylight hours. Also known as the shortwave infrared (SWIR).
The region of the electromagnetic spectrum between 0.77 to 1.4 microns. Most of the infrared solar radiation falls into this region. This near infrared (or solar IR) region is transmitted, absorbed, and reflected in a similar manner to visible light by most glazing and nonmetallic building materials.
electromagnetic radiation ranging from 0.7 to ~3 microns in wavelength