The near-infrared (NIR) window defines the range of wavelengths from 650 to 1350 nanometre (nm) where light has its maximum depth of penetration in tissue.
Penetration depth of ultraviolet, visible light and infrared radiation in biological tissue has not previously been adequately measured.
Near-infrared light (NIR) has shown promise in animal models of both Our recent tissue studies demonstrate no penetration of low level NIR.
(A) Near infrared (NIR) light has the best penetration depth through soft-tissue. (B ) Light when entering a medium can be reflected, scattered and absorbed by.
The penetration depth is defined as the depth for the 1/e attenuation. If the irradiated tissue can´t compensate this local energetic transfer you are overheated.