Patent ID: 7217267
Filing Date: 2007-05-15
Classification: A61B,A61N

Abstract:
1. A hair treatment method comprising: generating electromagnetic radiation having a predetermined spectral composition and a predetermined intensity in a predetermined number of pulses each having a predetermined duration, said pulses having a predetermined total energy; and directing the generated pulses from said generator away from entering a skin surface and in a direction substantially parallel to said skin surface, to impinge on hair fibers protruding from the skin surface, said pulses including at least two temporally spaced bursts of electromagnetic radiation, one of said bursts having characteristic parameters including a spectral composition, intensity, and pulse duration effective to generate, in hair shafts protruding from said skin surface, heat energy transmissible along the hair shafts to weaken the same below said skin surface, to enable breaking of the hair shafts below said skin surface, another of said bursts having characteristic parameters including a spectral composition, intensity, and pulse duration effective to sever the hair shafts above said skin surface.