What is NIR Light

Horace He

Last Updated: October 16, 2023

What is NIR Light

NIR light, also known as near-infrared light, refers to a specific wavelength of light that falls within the near-infrared spectrum, just beyond the visible spectrum. It is characterized by its monochromatic nature, consisting of a single wavelength. In the lighting industry, NIR light is commonly utilized for various applications, particularly in the field of photobiomodulation (PBM) of eyes and tissues.

NIR light can be obtained through the use of LED arrays and lasers. Lasers, in particular, are capable of producing coherent light energy, allowing for deep tissue penetration. The constant beam emitted by lasers enables targeted delivery of energy to specific areas, and the beam width can be expanded by coupling lasers into fiber optics, facilitating the distribution of energy to larger areas.

On the other hand, LEDs produce efficient light in specific wavelengths, although it is not coherent. However, LEDs have the advantage of generating minimal heat, making them safe for use without the risk of thermal injury. Additionally, LEDs can be coupled to arrays with ergonomic functions, enabling efficient energy delivery to larger areas, such as the brain.

NIR light, including both lasers and LEDs, has undergone human trials and received approval from the FDA (Food and Drug Administration). This recognition highlights the safety and effectiveness of NIR light therapy in specific applications.

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