Abstract: The invention provides a non-invasive skin treatment device (200) for generating a multiphoton ionization process at a target position (110) in skin tissue (102). The skin treatment device (200) comprises a laser source (105) configured and constructed for generating a laser beam (106), an optical system (109, 112) for focusing the laser beam into the target position below a skin surface (103), and a plasma unit (117) configured and constructed for generating a plasma (100) such that, in use, at least a portion of the plasma penetrates the skin tissue for generating at least one free electron at the target position. The skin treatment device further comprises a control unit (123) configured and constructed for controlling the laser source and the plasma unit such that, in use, at least a portion of the light of the laser beam is absorbed by said at least one free electron generated at the target position, thereby generating the multiphoton ionization process.

Abstract: A hair care device for enhancing uptake of a topical in hair. The hair care device comprises a topical delivery unit for applying the topical to the hair surface, an ultrasound generator (103) for generating ultrasound at a frequency exceeding 15 MHz, wherein an ultrasound intensity is in a range between 2 W/cm2 and 100 W/cm2, and an ultrasound transducer (105) for applying ultrasound to the topical and/or the hair surface to enhance uptake of the topical by the hair.

Abstract: The invention relates to a device (100) for radio-frequency (RF) skin treatment comprising an active electrode (1, 31) arranged on an operational side (15) of the device and having a first skin contact surface for electrical contact with a skin of a user during use. The device further comprises a return electrode (2, 32) arranged on the operational side (15) of the device and having a second skin contact surface for electrical contact with the skin of the user during use. The second skin contact surface is at least five times larger than the first skin contact surface. An RF generator (21) is arranged to supply an RF treatment voltage between the active electrode and the return electrode when the active electrode and the return electrode are in electrical contact with the skin, so as to heat the skin below the active electrode.

Abstract: A device (10) for light based skin treatment is provided. The device (10) comprises a light source (18) for providing an incident light beam (21) for treating a skin (30), optical elements for focusing the incident light beam (21) in a focal point (22) inside the skin (30), and a skin interface element (11) for, during use of the device (10), providing optical coupling of the incident light beam (21) from the device (10) into the skin (30). The skin interface element (11) comprises a transparent exit window (12) for allowing the incident light beam (21) to leave the device (10), on top of the exit window (12), a transparent mixture (13) of a polar substance and an apolar substance, and on top of the transparent mixture (13), a transparent foil (14), the transparent foil (14) being more hydrophobic than the exit window (12).

Abstract: A device (10) for light based skin treatment is provided. The device (10) comprises a light source (18) for providing an incident light beam (21) for treating a skin (30), optical elements for focusing the incident light beam (21) in a focal point (22) inside the skin (30), and a skin interface element (11) for, during use of the device (10), providing optical coupling of the incident light beam (21) from the device (10) into the skin (30). The skin interface element (11) comprises a transparent exit window (12) for allowing the incident light beam (21) to leave the device (10), on top of the exit window (12), a transparent mixture (13) of a polar substance and an apolar substance, and on top of the transparent mixture (13), a transparent foil (14), the transparent foil (14) being more hydrophobic than the exit window (12).

Abstract: The invention provides a non-invasive skin treatment device (100) comprising an r.f. treatment electrode (10); a return electrode (40); an r.f. generator (20) configured and arranged such that, during treatment, an r.f. treatment signal is applied between the r.f. treatment electrode (10) and the return electrode (40) for heating an inner region (15) of skin; an impedance measurement circuit (35) configured and arranged to measure, before treatment of the inner region, an initial skin impedance (Zo) between the r.f. treatment electrode (10) and the return electrode (40); and a treatment settings determiner (30) configured and arranged to determine, before treatment of the inner region (15), treatment settings associated with the r.f. treatment signal depending on the initial skin impedance (Zo) and on a dimension of the r.f. treatment electrode (10) in the contact plane, the treatment settings comprising at least one of a treatment duration (TD) associated with a desired treatment result, and an r.f.

Abstract: The invention relates to a device (100) for RF skin treatment, comprising an active electrode (1) arranged on an operational side (15) of the device and having a first skin contact surface for contact with a skin of a user, which first skin contact surface has a largest cross-sectional dimension smaller than or equal to 2 mm. The device comprises a return electrode (2) arranged on the operational side (15) of the device and having a second skin contact surface for contact with the skin of the user, wherein an area of the second skin contact surface is at least five times larger than an area of the first skin contact surface. An RF generator (21) is arranged to supply an RF treatment voltage between the active electrode (1) and the return electrode (2) so as to heat a skin region below the active electrode, wherein the RF treatment voltage has a frequency in a range of 100 MHz-3 GHz.

Abstract: A device (10) for light based skin treatment is provided. The device (10) comprises a light source (18) for providing an incident light beam (21) for treating a skin (30), optical elements for focusing the incident light beam (21) in a focal point (22) inside the skin (30), and a skin interface element (11) for, during use of the device (10), providing optical coupling of the incident light beam (21) from the device (10) into the skin (30). The skin interface element (11) comprises a transparent exit window (12) for allowing the incident light beam (21) to leave the device (10), on top of the exit window (12), a transparent mixture (13) of a polar substance and an apolar substance, and on top of the transparent mixture (13), a transparent foil (14), the transparent foil (14) being more hydrophobic than the exit window (12).

Abstract: A device for radio frequency (RF) skin treatment of skin of a user is provided. The device comprises an active electrode and a return electrode. The device further comprises an RF generator arranged to supply RF energy to the user's skin via the active electrode and the return electrode. The return electrode has a planar skin contact surface extending in a main plane. The active electrode has a skin contact surface with a maximum dimension in a range from 100 ?m to 500 ?m, and a surface area of the planar skin contact surface of the return electrode is at least 5 times larger than a surface area of the skin contact surface of the active electrode. The skin contact surface of the active electrode is arranged in a position at a distance from the main plane, seen in a direction perpendicular to the main plane. The device may be advantageously used, for example, to control the dimensions and shape of a thermal lesion in the user's skin generated by the RF energy.

Abstract: A measurement system for light-based measurement of collagen, using a first light intensity and a second light intensity according to the invention, compromises a light source (120) for emitting a light beam having a source wavelength range and an optical system (130) to polarize light within the source wavelength range, thereby generating a polarized light beam (140), and to direct and focus the polarized light beam (140) to a target position inside the skin (160) at a predetermined focus depth below an outer surface of the skin.

Abstract: The invention provides a non-invasive treatment device (100) for heating a first (15) and a second (25) inner region of skin using r.f. electrical current, comprising: a first r.f. treatment electrode (10) configured and arranged to allow r.f. current to pass through the first inner region (15) to a return electrode (340), a second r.f. treatment electrode (20) configured and arranged to allow r.f. current to pass through the second inner region (25) to the return electrode (340), the device further being arranged such that the smallest distance between the first r.f. treatment electrode (10) and the return electrode (340) is less than the smallest distance between the second r.f. treatment electrode (20) and the return electrode (340); wherein the electrical skin contact area of the return electrode (340) is 5 or more times larger than the electrical skin contact area of the first r.f. treatment electrode (10), and the electrical skin contact area of the second r.f.

Abstract: The invention relates to a device (100) for RF skin treatment comprising an outer electrode (2) arranged on an operational side (15) of the device. The outer electrode has an annular or equilateral polygonal shape. An inner electrode (1) is arranged at a center of the outer electrode and is surrounded by the outer electrode. An RF generator (21) is arranged to supply an RF treatment voltage between the inner electrode (1) and the outer electrode (2). A skin contact surface of the inner electrode has a largest cross-sectional dimension in a range of 200-500 ?m, and the RF treatment voltage is less than 50 V. The invention provides a device with improved safety in that it enables the creation of non-ablative fractionated skin lesions, particularly using a relatively low RF treatment voltage for treating the skin as compared to known devices and without the necessity of a feedback or monitoring system.

Abstract: The invention relates to a device (1) for skin treatment comprising a non-circular symmetrical outer electrode and at least two inner electrodes (20; 22) surrounded by the outer electrodes. An RF generator (16) is arranged to supply an RF voltage between the inner electrodes and the outer electrode. If the outer electrode has two or more axes of symmetry, then each of the inner electrodes (20; 22) is at an equal minimum distance from the outer electrode and an equal distance from a common point of intersection of all axes of symmetry and is positioned, with respect to each of the respective axes of symmetry, either on said respective axis of symmetry or at a distance from said respective axis of symmetry and symmetrically relative to one of the other inner electrodes. This electrode configuration provides improved uniformity in simultaneously created lesions.

Abstract: A device (10) for energy-based skin treatment is provided. The device (10) comprises a light source (18) for providing polarized incident light (21) having an incident polarization, optical elements (11, 12, 13) for focusing the polarized incident light (21) in a focal point (22) within a collagen layer of the skin (30), a polarization-sensitive detection unit (41, 42) for selectively detecting a selected polarization component of light of a generated harmonic (23) of the polarized incident light (21) returning from the skin (30), and a processor, at least being coupled to the polarization-sensitive detection unit (41, 42), for determining a depth of the focal point (22) within the collagen layer based on the detected selected polarization component.

Abstract: A device for cutting hair is disclosed that includes a laser beam generator (2) and a polarisation controller (6) configured to polarise the laser beam (10) and substantially align the polarisation of the laser beam with a longitudinal axis of a hair to be cut. Also disclosed is a method of cutting hair using a laser beam to cut hair. The method including generating and polarising the laser beam to substantially align the polarisation of the laser beam with a longitudinal axis of a hair to be cut.

Abstract: The measurement system 110 comprises a light source 120 configured and arranged for emitting a light beam via a polarization modulator 130 to a target position inside the skin 160, wherein the polarization modulator 130 is configured and arranged to simultaneously provide, in use, a first and a second region in a cross-section of the light beam in the target position, the first and the second region being distinct and having a corresponding first and second direction of polarization, the first and the second polarization direction being different from each other, and the measurement system also comprises a detection unit 150 to simultaneously detect a first and a second intensity of reflected light 145, the first intensity corresponding to light reflected from the first region of the light beam in the target position 160, and the second intensity corresponding to light reflected from the second region of the light beam in the target position 160, and the measurement system further comprises a processor being

Abstract: The invention relates generally to the treatment of skin using laser light, and more particularly to a non-invasive device and method for such treatment. During skin treatments, heating of the epidermis is undesired because it may cause discomfort for the person being treated, adverse skin reactions and unwanted changes in skin pigment. The invention provides a laser treatment beam having a first 22a and a second 22b beam region of non-zero light intensity disposed at a periphery of a transverse cross-section of the beam, and a third beam region 22c, arranged between the first 22a and the second 22b beam region, of lower light intensity than said non-zero light intensity. The treatment beam 22 exits the device 10 along its optical treatment axis 13.

Abstract: The invention provides a non-invasive device comprising an optical system having a laser light source for generating a light beam, being configured such that, in use, the light beam exits the device and impinges on an outer surface of the skin to be treated; the optical system being configured to focus, in use, the light beam at a position of a treatment location inside the skin, whereby Laser Induced Optical Breakdown is induced at the position of the treatment location; an opening disposed such that, in use, light returning from the skin enters the device as a measurement light beam; and a first and second intensity detection channel configured and arranged to detect the intensity in, respectively, a first and a second bandwidth range of the measurement light beam, wherein the first and the second bandwidth ranges both comprise a wavelength of light produced in the skin as a result of Laser Induced Optical Breakdown, and the first bandwidth range comprises the Second Harmonic Generation wavelength of the la

Abstract: The invention provides a non-invasive skin treatment device (200) for generating a multiphoton ionization process at a target position (110) in skin tissue (102). The skin treatment device (200) comprises a laser source (105) configured and constructed for generating a laser beam (106), an optical system (109, 112) for focusing the laser beam into the target position below a skin surface (103), and a plasma unit (117) configured and constructed for generating a plasma (100) such that, in use, at least a portion of the plasma penetrates the skin tissue for generating at least one free electron at the target position. The skin treatment device further comprises a control unit (123) configured and constructed for controlling the laser source and the plasma unit such that, in use, at least a portion of the light of the laser beam is absorbed by said at least one free electron generated at the target position, thereby generating the multiphoton ionization process.

Abstract: The invention provides a non-invasive skin treatment device (100) comprising: a light source (10) constructed and configured for generating linearly polarized probe light (12) and linearly polarized treatment light (22), a polarization modulator (30) constructed and configured for controlling a polarization direction of the probe light and a polarization direction of the treatment light, a polarization sensitive sensor (40) constructed and configured for sensing a level of depolarization of the probe light by sensing an intensity of back-scattered probe light (42) from the target position (210) in a predefined polarization direction of the polarization sensitive sensor, and a controller (60) being configured for scanning the polarization direction of the probe light over a predefined range while receiving the measurement signal (Sm) and for selecting an optimum polarization (P1) direction for which the depolarization of the probe light is at a minimum.