laser may thus appear dim red and can present a hazard since it may actually carry a large amount of energy. Even IR at wavelengths up to 1,050 nm from pulsed lasers can be seen by humans under certain conditions.

Commonly used subdivision scheme

A commonly used subdivision scheme is:

The band comprising NIR and SWIR together is sometimes called reflected infrared, whereas the band comprising MWIR and LWIR is sometimes referred to as thermal infrared.

CIE division scheme

The International Commission on Illumination

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