In the spectrum of wavelengths from 0.76 to 400 microns is called infrared, infrared is invisible light. All substances above absolute zero (-273.15 ℃) can produce infrared. Modern physics calls them heat rays. Medical infrared rays can be divided into two categories: near-infrared and far-infrared.
Infrared emitting tube in the LED packaging industry, there are mainly three commonly used wavelengths, as follows 850NM, 875NM, 940NM. According to the characteristics of the wavelength of the application of the product is also very different, 850NM wavelengths are mainly used in infrared monitoring equipment, 875NM is mainly used in medical equipment, 940NM band is mainly used in infrared control equipment.EG: Infrared remote control, photoelectric switch, photoelectric counting equipment and so on.