Basing on the selective light absorption theory, we let the diode laser generated by laser hair removal machine pass through the skin surface and penetrate the hair follicles by adjusting the wavelength, energy, and the pulse width to realize the hair removal purpose. In the hair follicle and hair shaft, there are plentiful melanin spreading between the follicle matrix and moving to the hair shaft structure. Once the melanin has absorbed the energy of laser, it will show a sharp rise in temperature and lead to destroy upon the surrounding follicle tissue. In this way, the unwanted hair will be removed completely.
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