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Hair-growth control device and hair-growth control method

A technology of hair growth and control equipment, which is applied in the direction of control equipment energy, medical science, surgery, etc., and can solve the problem of high risk of impact

Inactive Publication Date: 2008-04-30
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In many cases, the risk of affecting tissues outside the target root tissue is high

Method used

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  • Hair-growth control device and hair-growth control method
  • Hair-growth control device and hair-growth control method
  • Hair-growth control device and hair-growth control method

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Embodiment Construction

[0050]In FIG. 1 , only the main components of a device 1 for controlling the growth of hair 3 emerging from human skin 5 are schematically shown. The device 1 comprises a laser source 7 for generating a laser beam 9 within a pulse time. In the embodiment shown, the laser source 7 is a pulsed Nd:YAG laser and the wavelength of the generated laser beam 9 is 1064 nm. The generated laser beam 9 travels along the path from the laser source 7 towards the skin 5 via the first mirror 11, the optical system 15 comprising a lens system or objective, the laser beam manipulator 17 comprising a second mirror 19 and the radiation exit window 21. The light path, in which the first mirror 11 is mounted in a fixed position within the housing 13 of the device 1 , a radiation exit window 21 is provided in the skin contacting surface 23 of the housing 13 . The optical system 15 focuses the laser beam 9 to a focal point 25 . The laser beam manipulator 17 comprises an electric drive member 27, wh...

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PUM

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Abstract

The invention relates to a device (1) for hair-growth control of hairs (3), in particular hairs growing from human skin (5). The device (1) has a laser source (7) for generating a laser beam (9) during a pulse time, an optical system (15) for focusing the laser beam into a focal spot (25), and a laser beam manipulator (17) for positioning the focal spot in a target position. According to the invention, a dimension of the focal spot (25) and a power of the generated laser beam (9) are such that, in the focal spot (25), the laser beam has a power density which is above a characteristic threshold value for hair-growth related skin tissue above which, for the pulse time, a laser induced optical breakdown (LIOB) phenomenon occurs in the hair-growth related skin tissue. The LIOB phenomenon results in a number of mechanical effects, such as cavitation and the generation of shock waves, which damage the hair-growth related skin tissue in positions surrounding the LIOB phenomenon. An advantage of the device (1) according to the invention is that the amount of total energy which is necessary to cause trauma and induce (semi-)permanent cessation of hair-growth is at such a level that irritation and damage of the surrounding skin tissue is very limited or even completely prevented.

Description

technical field [0001] The invention relates to a hair growth control device comprising a laser beam source for providing a laser beam within a pulse time, a laser beam guiding device and a control unit for determining a target position for the laser beam. Background technique [0002] Document WO 00 / 62700 discloses a device of the kind mentioned in the opening paragraph. In one embodiment of the known device, laser energy is supplied to the root of the hair to heat and kill the root and the skin tissue present in the immediately adjacent area. Thereby, hair growth is inhibited permanently or at least for an extended period of time. [0003] A problem with the known device is that it is inefficient, since a relatively large amount of energy is supplied to the skin. Too much supplied energy is absorbed by non-target tissues such as skin tissue above and / or below the hair root. In many cases, tissues outside the target root tissue are at high risk of being affected. This c...

Claims

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Application Information

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IPC IPC(8): A61B18/20
CPCA61B18/203A61B2018/00476A61B2018/00904A61B18/20A61B2018/00452
Inventor R·A·M·范哈尔R·维尔哈根G·鲁森M·E·罗尔斯马
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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