nuIR

nuIR is not a standardized term in physics or spectroscopy. In some writings, nuIR is used as a stylized combination of the symbol ν, representing frequency, with IR, standing for infrared, to indicate infrared-frequency components or channels. Because ν is the conventional symbol for frequency and IR denotes the infrared portion of the electromagnetic spectrum, nuIR can be read as "infrared-frequency" signals or bands in informal contexts.

Infrared refers to wavelengths roughly from 0.75 micrometers to about 1000 micrometers (1 millimeter). The corresponding frequencies span roughly 3×10^11 Hz to 4×10^14 Hz.

The infrared region is commonly subdivided into near-IR (0.75–1.4 μm), short-wave infrared (1.4–3 μm), mid-wave infrared (3–8 μm), and long-wave infrared (8–15 μm). These bands are widely used in spectroscopy, thermal imaging, astronomy, and remote sensing, as well as in fiber-optic communications and chemical sensing.

Because nuIR is not a widely adopted technical designation, its precise meaning can vary with context. When encountered, it is best to consult the source to determine whether nuIR refers to a frequency class, a spectrum band, or a branding name.