What is the wavelength of near infrared?
800 to 2,500 nm
Near-infrared light generally refers to light within the wavenumber range of 12,500 to 4,000 cm-1 (wavelengths from 800 to 2,500 nm) (see Fig. 1).
What is a near infrared laser?
Near infrared (NIR) laser light can have important reactions on live cells. For example, in a macroscopic scale, it is used therapeutically to reduce inflammation and in a single-cell scale, NIR lasers have been experimentally used to guide neuronal growth.
What laser wavelength is associated with infrared light?
The visible region consists of radiation with wavelengths between 400 and 700 nm. This is the portion we call visible light. The infrared region of the spectrum consists of radiation with wavelengths between 700 nm and 1 mm. Laser radiation absorbed by the skin penetrates only a few layers.
How many nanometers are in near infrared light?
Near-infrared starts at 750 nanometers and extends all the way to 1,200 nm. Near-infrared wavelengths that have been scientifically proven to yield benefits for humans include the 810 nm, 830 nm and 850 nm wavelengths.
What is near and far infrared?
Infrared light has a range of wavelengths, just like visible light has wavelengths that range from red light to violet. “Near infrared” light is closest in wavelength to visible light and “far infrared” is closer to the microwave region of the electromagnetic spectrum.
Is near infrared light visible?
Far-Infrared Light. The farther away a wavelength gets from visible light, the longer the wavelength becomes and the closer it gets to the microwave range. You can’t see or feel near-infrared light.
What is near infrared light?
Infrared Light (IR) is the light found just past what is visible to the human eye. Near-Infrared Light (NIR) is the section of electromagnetic radiation (EMR) wavelengths nearest to the normal range but just past what we can see. Visible light is the smallest section of the electromagnetic (EM) radiation field.
Are there infrared lasers?
An infrared laser is a low cost, high power laser with many capabilities. Lasers in this range emit radiation in the “eye safe” part of the electromagnetic spectrum, where light is largely absorbed by the cornea and lens, without reaching the retina. …
How many nanometers is red light?
WAVELENGTHS OF VISIBLE LIGHT As the full spectrum of visible light travels through a prism, the wavelengths separate into the colors of the rainbow because each color is a different wavelength. Violet has the shortest wavelength, at around 380 nanometers, and red has the longest wavelength, at around 700 nanometers.
What is the best nm for red light therapy?
However, the bulk of clinical literature suggests that light in the mid-600 nm range and low- to mid-800 nm range is the most effective. That is because these wavelengths have the greatest effect on the cellular respiration process.
What does near infrared mean?
Definition of near-infrared. : of or relating to the shorter wavelengths of radiation in the infrared spectrum and especially to those between 0.7 and 2.5 micrometers.
What is the difference between near and far infrared light?
Infrared is part of the spectrum of light. Light is measured by the wavelength in microns. Near infrared is between 1 and 2 microns. Far infrared is from 4-14 microns. Far infrared resonates with your own body’s natural far infrared. Your own body emits far infrared in the frequency of 9.4 microns which is far infrared.
Is far infrared the same as visible light?
Visible light includes radiation with wavelengths between 400 nm and 700 nm, meaning that far infrared photons have tens to hundreds times less energy than visible light photons. Due to black-body radiation, objects with temperatures between about 5 K and 340 K will emit radiation in the far infrared range according to Wien’s displacement law.
What are the dangers of infrared waves?
Infrared waves are incredibly versatile, but they can also be dangerous. Infrared radiation has a longer wavelength and lower frequency than visible light. Too much exposure can damage your eyes and skin. On a global scale, trapped infrared radiation contributes to global warming.