Hair growth control method and apparatus for the method

Abstract

A controlled light having a wavelength of 400 to 600 nm inclusive and an energy of 0.01 to 1 J / cm2 inclusive is irradiated to a site around a hair root for 1 ms or shorter in the form of a flash light, thereby causing the absorption of the light by a biological light-absorptive component which occurs in the periphery of the hair root. Thus, the growth of hair can be controlled with causing little adverse side-effects.

Description

technical field [0001] The invention relates to a hair growth regulating method and a regulating device thereof which use light to regulate hair growth. Background technique [0002] Hair removal by radiation of light is well known in the medical world. This involves using a high-output (class 4) laser to destroy the cells at the root (and follicle) of the hair to necrosis the hair. However, side effects such as burns and age spots are prone to occur along with cell destruction, so this treatment should only be performed by specialists. [0003] While it would be desirable to be able to easily perform hair removal and hair regrowth at home, there is currently no technology that meets this need. In addition, although an instrument for assisting hair growth and hair regeneration is proposed in Japanese Patent Laid-Open No. 2002-541906, which applies light vibrations to the scalp while radiating light, but in this case the light radiation only helps The hair tonic penetrates...

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