Abstract
This design is about low-energy optical therapy using the photo-chemical effect of light rays on the living body using RED LED and IR LED, and it is about the emisson wavelength and power density of LED. The amount of power in light transmitted to the body by 660nm red light and 830nm near-infrared light passing through the skin was simulated according to the skin depth and the absorption coefficient of fat. In addition, the power density for the interference effect between adjacent LED was calculated for the arrangement of LED. As for the power density according to the skin depth, it was confirmed that the power density at the abdominal depth of 3.5cm would supply about 0.44mW/㎠ of energy by adding the red light power density of 1.76mW/㎠ and the power density by the IR LED.
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