This invention especially is something regarding, the device 1 for departure hair control of hair such as the hair which grows from skin 5 of the person 3. The said device 1 the laser source the optical system has had with the laser beam operation vessel 17 in order to position 15 which makes 7 which generates laser beam 9 between ru pulse times and the above-mentioned laser beam focus spot focus 25 and the above-mentioned focus spot in target position. According to this invention, size of focus spot 25 and power of the laser beam 9 which occurs the above-mentioned laser beam, kind of possesses the power density which is higher than specific threshold vis-a-vis departure hair-related skin organization in focus spot 25. From the above-mentioned specific threshold at on, between the above-mentioned pulse times, laser induction optical surrender (LIOB) phenomenon occurs in the above-mentioned departure hair-related skin organization. The departure hair-related skin organization which the result of the said LIOB phenomenon, the plural mechanical effects such as cavitation and generation of the sonic boom occur, as for these in the position around the said LIOB phenomenon is made to damage. As for advantage of the device 1 due to this invention, as the external wound is made to cause, although (the half) of the departure hair permanent stop is made to cause, the necessary all the energy quantities are limited, stimulus and the damage of skin organization around very and or completely even prevention is a point where it becomes those of the kind of level which is done.本発明は、特には人の皮膚5から成長する毛髪等の、毛髪3の発毛制御のための装置1に関するものである。該装置1は、或るパルス時間の間にレーザビーム9を発生するレーザ源7と、上記レーザビームを焦点スポット25に収束させる光学系15と、上記焦点スポットを目標位置に位置決めするためのレーザビーム操作器17とを有している。本発明によれば、焦点スポット25の寸法及び発生されるレーザビーム9のパワーは、焦点スポット25において上記レーザビームが発毛関連皮膚組織に対し固有の閾値より高いパワー密度を有するようなものとする。上記固有の閾値より上では、上記パルス時間の間に、上記発毛関連皮膚組織にレーザ誘導光学降伏(LIOB)現象が生じる。該LIOB現象の結果、キャビテーション及び衝撃波の発生等の複数の機械的効果が生じ、これらは該LIOB現象の周囲の位置における発毛関連皮膚組織を損傷させる。本発明による装置1の利点は、外傷を生じさせ
