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What is the range of the infrared spectrum?

What is the range of the infrared spectrum?

Feb 26, 2021

Infrared light: > 760nm,

Visible light wavelength: 400-760nm,

Ultraviolet wavelength: less than 400nm.


The three wavelengths that pass through the atmosphere are divided into:

Near-infrared band 1 ~ 3 microns

Mid-infrared band 3 ~ 5 microns

Far-infrared band 8 ~ 14 microns


According to the infrared spectrum, it can be divided into:

Near-infrared band 1 ~ 3 microns

Mid-infrared band 3 ~ 40 microns

Far-infrared band 40 ~ 1000 microns


The medical field is often divided in this way:

Near-infrared region 0.76 ~ 3 micron

Mid-infrared region 3 ~ 30 microns

The far-infrared region is 30 ~ 1000 microns


Medical infrared can be divided into two categories: 

near-infrared and far-infrared. Near-infrared ray or short wave infrared ray, wavelength 0.76 ~ 1.5 micron, penetrates deeper into human tissues.


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