公开(公告)号：US09622818B2

公开(公告)日：2017-04-18

申请号：US14405243

申请日：2013-05-22

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Mark Thomas Johnson ,  Calina Ciuhu ,  Rieko Verhagen ,  Bastiaan Wilhelmus Maria Moeskops ,  Kiran Kumar Thumma ,  Thomas Adriaan Cohen Stuart ,  Petrus Cornelis Paulus Bouten ,  Roelof Koole ,  Emile Johannes Karel Verstegen ,  Petrus Theodorus Jutte

IPC: A61B18/20 ,  A61B18/00

CPC classification number: A61B18/203 ,  A61B2018/00476 ,  A61B2018/00601 ,  A61B2018/202 ,  A61B2018/2035

Abstract: A laser-based hair cutting device (10) comprises a laser source (18), an optically transparent exit window (15) and optical elements (11, 12, 13, 14). The laser source (18) provides an incident light beam (21) for cutting a hair (22) above and near a skin surface by laser-induced optical breakdown (LIOB) of the hair (22) in a focal position of the light beam (21). The optically transparent exit window has an external exit surface (15) for allowing the incident light beam (21) to leave the device. The optical elements (11, 12, 13, 14) focus the incident light beam (21) in the focal position at a working distance from the exit surface (15). The working distance is at least 1 π ⁢ ⁢ NA 2 ⁢ 2 ⁢ E p ⁢ NA 2 ⁢ π F thresh - M 2 ⁢ λ 2 wherein NA is a numerical aperture of the incident light beam leaving the device (10), Ep is a pulse energy (J) of the incident light beam (21), Fthresh is a fluence threshold (J/m2) of the exit surface, M2 is a beam quality of the incident light beam (21) and λ is a wavelength (m) of the incident light beam (21).

公开(公告)号：US20150202006A1

公开(公告)日：2015-07-23

申请号：US14405243

申请日：2013-05-22

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Mark Thomas Johnson ,  Calina Ciuhu ,  Rieko Verhagen ,  Bastiaan Wilhelmus Maria Moeskops ,  Kiran Kumar Thumma ,  Thomas Adriaan Cohen Stuart ,  Petrus Cornelis Paulus Bouten ,  Roelof Koole ,  Emile Johannes Karel Verstegen ,  Petrus Theodorus Jutte

IPC: A61B18/20

CPC classification number: A61B18/203 ,  A61B2018/00476 ,  A61B2018/00601 ,  A61B2018/202 ,  A61B2018/2035

Abstract: A laser-based hair cutting device (10) is provided, which device (10) comprises a laser source (18), an optically transparent exit window (15) and optical elements (11, 12, 13, 14) The laser source (18) provides an incident light beam (21) for cutting a hair (22) above and near a skin surface by laser-induced optical breakdown (LIOB) of the hair (22) in a focal position of the light beam (21). The optically transparent exit window has an external exit surface (15) for allowing the incident light beam (21) to leave the device. The optical elements (11, 12, 13, 14) focus the incident light beam (21) in the focal position at a working distance from the exit surface (15). The laser source (18) and the optical elements are arranged and configured such that the working distance is at least (I) wherein NA is a numerical aperture of the incident light beam leaving the device (10), Ep is a pulse energy (J) of the incident light beam (21), Fthresh is a fluence threshold (J/m2) of the exit surface, M2 is a beam quality of the incident light beam (21) and λ is a wavelength (m) of the incident light beam (21). 1 π   NA 2  2  E p  NA 2  π F thresh - M 2  λ 2 ( 1 )

Abstract translation: 提供了一种基于激光的头发切割装置（10），该装置（10）包括激光源（18），光学透明出射窗（15）和光学元件（11,12,13,14）。激光源 18）提供入射光束（21），用于在光束（21）的焦点位置通过激光诱发的发光光学击穿（LIOB）在皮肤表面上方和附近切割毛发（22）。 光学透明出射窗具有用于允许入射光束（21）离开设备的外部出射表面（15）。 光学元件（11,12,13,14）将入射光束（21）聚焦在离出射表面（15）的工作距离处的焦点位置。 激光源（18）和光学元件被布置和配置为使得工作距离至少为（I）其中NA是离开设备（10）的入射光束的数值孔​​径，Ep是脉冲能量（J ），Fthresh是出射面的注量阈值（J / m2），M2是入射光束（21）的光束质量，λ是入射光的波长（μm） 梁（21）。 1＆pgr 作者NA 2;;; NA NA;;;;; F thresh - M2λλ2（1）