ultraviolet LED application

Ultraviolet ray used in medicine and the phototherapy instrument it to adopt UVB technology . the wavelength of phototherapy instrument is 311nm. the 311nm ultraviolet ray has obvious effect for Vitiligo and psoriasis. it is physical treatments of the skin disease. the uv led strip can emits ultraviolet ray as medium wavelength as 311nm .the 311nm can be absorbed by skip tissues. it has obvious biology effect for skip tissues. and it can directly kill the bacterium or the virus in superficial tissue. it keeps the circulation moving and warms the extremities .

The angle of lens is decision illuminate direction, we can calculate illuminate area with tangent function.

Trigonometric  Function  Of  Acute Angle

tan10°=0.176（can calculate that lens value as 20°）
tan12.5°=0.222（can calculate that lens value as 25°）
tan15°=2-√3
tan22.5°=√2-1
tan30°=√3/3
tan45°=1
tan60°=√3

Different angle , different aperture and illuminate value

30°
1meter aperture φ0.56M illuminate area as 0.246 square   metres
2meter aperture φ1.12M illuminate area as 0.985 square metres
3meter aperture φ1.68M illuminate area as 2.217 square metres
45°
1meter aperture φ0.828M illuminate area as 0.538 square metres
2meter aperture φ1.656M illuminate area as 2.154 square metres
3meter aperture φ2.484M illuminate area as 4.864 square metres
60°
1meter aperture φ1.15M illuminate area as 1.046 square metres
2meter aperture φ2.3M illuminate area as 4.189 square metres
3meter aperture φ3.46M illuminate area as 9.424 square metres
120°
1meter aperture φ3.464M illuminate area as 9.424 square metres
2meter aperture φ6.928M M illuminate area as 37.697square metres
3meter aperture φ10.392M illuminate area as 84.818 square metres

Are ultraviolet therapy instrument potentially harmful to skin?

The ultraviolet therapy instrument can emits ultraviolet ray as 311nm(because uv led strip inside). the ultraviolet ray ability to be absorbed by epidermal tissue. so the 311nm of ultraviolet has obvious biological effect for skin and other tissues. so far, a number of investigations have been launched in over the years,for example: include that detecting the light-absorbing effect of skin pigmented diseases. all result proved ultraviolet therapy instrument are relatively safe. the skin cancer have not been caused directly by ultraviolet therapy instrument.

The effect of plant growth with different led source

Some scholars have found that the different led source changes will affect the physical and chemical properties of plant . they gives examples like that the single led or combination led(Multi-chip Array Combination LED) will production of photosynthesis for Chrysanthemum lily, Phalaenopsis, holly, leaves with lettuce . The red light and R+ B light were the most effective for the accumulation of the soluble sugar and titratable acid. 4. Different light emitting diode sources had different effects on tomato fruit flavor quality.

Yellow LED increased the plant height and leaf pigment content at initial growth stage. Overall, red-blue LED was more beneficial to the culture of strong plant seedlings.