The relationship between red light and "infrared rays"

the lightis a radiationElectromagnetic waves,ThatwavelengthDistributed from 300nm(ultraviolet rays) to 14,000nm (far infrared). However, in terms of human experience, the "light domain" usually refers to the fleshEyeThe visible light wave domain is the range from 400nm (purple) to 700nm (red) that can be perceived by human eyes, and is generally called the "visible light domain". Red light falls on the edge of the visible spectrum, with a wavelength of 620-750nm, which is the closest visible light to infrared. Next to red light is what we often hear, but rarely see.Infrared (IR). According to the data of the Topology Research Institute, different lights will have different effects, among which red light and near-infrared light are the most widely used.

Infrared rays are divided into near-infrared rays and far-infrared rays

"Near-infrared rays" with wavelengths greater than 700nm and "ultraviolet rays" with wavelengths shorter than 400nm are beyond the range of human vision. Therefore, technically, these two types of spectrum should not be called "light", but should be called "lines". Generally, the infrared categories we often hear include near infrared (NIR) and far infrared (FIR).

Red light and near infrared (NIR)

According to research by foreign scholars, red light and near-infrared rays have the deepest penetration depth to human skin. According to research by YY. Huang and many scholars, when 600-900nm red light and near-infrared rays irradiate the human body, the mitochondrial chromophore in the skin cells will absorb photons, trigger electron transmission, and release the smallest energy unit in the human bodyATP (adenosine triphosphate)andNO (nitric oxide),health careROS (reactive oxygen species)In this respect, red light and near-infrared light can be said to be helpful to the human body, and can also be said to be bio-absorbable light.

It can be seen from the Absorbaqnce diagram that most of the energy of near-infrared rays will be absorbed by water, and the largest component in cells is water. Therefore, the use time and distance of near-infrared rays are generally limited, and attention must be paid to the accumulation of heat energy. Red light is the safest wavelength band closest to infrared rays, and it does not cause burns like near-infrared rays, so it is suitable for daily home health care.

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What is infrared?

infrared(Infrared, referred to as IR) iswavelengthbetweenmicrowaveandvisible lightbetweenElectromagnetic waves, whose wavelength is at 760Nano(nm) to 1 millimeter (mm), it is invisible light with a wavelength longer than red light, and the corresponding frequency is about 430THzto 300GHzIn the range. Most of the thermal radiation emitted by objects at room temperature is in this band.

Infrared rays were discovered by astronomers in the 1800'sWilliam HerschelHe found that there is a radiation with a frequency lower than red light, which, although invisible to the naked eye, can still increase the temperature of the surface of the illuminated object.EarthfromsunMore than half of the energy gained is in the form of infrared absorption. The balance of the earth's absorption and emission of infrared radiationclimatehave a crucial impact.

What is far infrared?

far infrared(Far Infrared, abbreviated FIR), generally refers tospectrumThe light waves located in the 15~1000µm region belong toinfraredwavelength range. in the visible light spectrumredThe outside of the light is invisible light. Different academic circles often define the range of far-infrared rays differently. For example, astronomy often defines far-infrared rays as electromagnetic waves with wavelengths between 25 µm and 350 µm. The living entity can feel its presence in the form of "heat".

Far-infrared rays in the range of 4 μm ~ 14 μm are also known as "the light of birth", so far-infrared rays are not only technology,astronomicalIn addition to the application on the Internet, it can also be used in health care. some plantsgermAfter being irradiated with far-infrared rays, it helpsenzymeActive activation, accelerated germination.

Since far infrared is widely used in health care products, all countries have requirements for certification of far infrared products. Among them are official institutions; there are also institutions established by peers, for example: Japan'sJapan Far Infrared Ray Associationand KoreanKorea Far Infrared Rays Association. Taiwan's certification body hasFar Infrared Health Science and Technology Development Association of the Republic of China,China Far Infrared Application Development Association.

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References:

• Topology Industry Research Institute, 2013/04
• Ann Biomed Eng . 2012 February ; 40(2): 516–533
• Dose-Response, 9:602–618, 2011
• Wikipedia, 2019/04
• Wikipedia, 2019/04
• study.com, infrared-waves-definition-uses-examples, 2019/04

*Disclaimer: The content contained in this article is for informational purposes only and does not constitute an offer of sale, solicitation of purchase, invitation, suggestion or recommendation to complete any transaction. This article is also the author's personal experience and opinions, and its content does not represent the views of this website.

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