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Research

 
Date:2013/07/17

 

UV light is a kind of invisible light beyond spectrum. The UV iraadiation from the sun to the ground almost only UVA and UVB wavelengths after ozone layer on the earth surface isolated and thus it is minimal for UVC wavelength to have bactericidal capacity.

Humans will take advantage of the natural UV light. According to the difference of function and purpose and use a variety of materials to UVA, UVB and UVC be applicated for the lamp manufacturing technology and thus develop energy-saving, low temperature and good effect of UV lamps.

Types Wavelength(nm) Feature
UVA 315~400 The longest wavelength with a high degree of penetration. Biological role is weak under the band irradiation, it can cause some of the material to generate fluorescence.
UVB 280~315 The wavelength is between UVA and UVC. It make Vitamin D convert to vitamin D and promote epithelial cell growth, produce melanin and so on.
UVC 100~280 The wavelength is shortest, so it is cut off on the ozone layer of earth. It is not harmful to human body. This UV band is to bacteria and viruses what has the function of sterilization and suppression.

The wavelength unit is namometer ( nm ) , 1nm Is millionth of a millimeter(mm) ,Equivalent to the length of 45 atomic string together. Moreover, a wavelength of 400nm ~ 760nm is already visible range, but not fall within the scope of UV rays.

 

 

 

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