Abstract: The present application relates to a device (10) for cutting hair. The device has a skin contacting face (13) that is arranged to be placed against a surface of the skin of a user during use. An optical system (20) directs a cutting laser beam (18) across a cutting zone (15) parallel to and spaced from said skin contacting face (13) to cut hairs extending into the cutting zone (15). A laser beam sensor (40) is configured to generate information indicative of one or more optical properties of the cutting laser beam (18). A controller (40) is configured to adjust one or more characteristics of the optical system (20) in dependence on the information generated by the laser beam sensor (40). The present invention also relates to a method of cutting hair and a computer program comprising instructions which, when executed by at least one processor, cause the method to be performed.

Abstract: The present application relates to a device (10) for cutting hair. The device (10) has a skin contacting face (13) that is arranged to be placed against a surface of the skin (16) of a user during use, and an optical system (20) configured to direct a cutting laser beam (18) across a cutting zone (15) parallel to and spaced from said skin contacting face (13) to cut hairs (17) extending into the cutting zone (15). The device also has a detector (40) configured to generate information indicative of the presence of one or more objects representative of hair (17) and/or skin (16) in the cutting zone (15), and a controller (27). The controller (27) is able to determine the presence of one or more objects representative of hair (17) and/or skin (16) in the cutting zone (15) and to adjust one or more characteristics of the optical system (20) in dependence on the information generated by the detector (40).

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).

Abstract: The present application relates to a cutting head (1) for a device for cutting hair. The cutting head has an optical system (3) which directs a laser beam (7) across a cutting zone (8) in the cutting head. The laser beam has a fast and a slow axis. The optical system has a focus lens (6) configured to form a first focal point (11) of the laser beam in the cutting zone. In one embodiment, the optical system (3) also has a focusing element (15) which refocuses the laser beam to form a second focal point (16) of the laser beam in the cutting zone. In another embodiment, the focus lens forms a focal length of the laser beam in the cutting zone along its fast axis which is greater than a focal length of the laser beam in the cutting zone along its slow axis.

Abstract: The present application relates to a device for cutting hair (1). The device has a skin contacting face (3) that is arranged to be placed against a surface of the skin (6) of a user during use, and an optical system configured to direct a cutting laser beam (8) across a cutting zone (5) parallel to and spaced from said skin contacting face (3) to cut hairs extending into the cutting zone (5). The device also has a skin sensor (18) configured to detect one or more optical properties of the surface of the skin (6), and a control unit (20) configured to adjust one or more characteristics of the optical system in dependence on the one or more optical properties of the skin (6) detected by the skin sensor (18). The present application also relates to a system for cutting hair comprising a device for cutting hair and a base unit for receiving the device.

Abstract: The invention provides a treatment device (100) for fractional laser-based treatment. The treatment device comprises a treatment generator (80) comprising a treatment laser (20) and a laser scanning system (30). The laser scanning system comprises at least one movable deflection element and is configured and arranged for scanning laser light across an emission window (70) towards skin tissue (110) from a plurality of locations (74) in the emission window by moving the at least one deflection element relative to the emission window, whereby, in use, laser-based lesions (120) are generated inside the skin tissue. The treatment device also comprises a controller (60) for generating a predefined disposition of lesions (120) in the skin tissue by emitting laser light via selected ones of the plurality of locations in the emission window while the treatment device is moved relative to the skin surface (105).

Abstract: The invention provides a treatment device (100) for fractional laser-based skin treatment. The treatment device comprises an emission window (70) comprising an elongated area (75) and a plurality of predefined locations (74) in said elongated area (75), wherein the predefined locations (74) are arranged in an elongated array which extends along a treatment axis (72) of the window (70), and wherein each predefined location (74) in the array is located at a distance from the treatment axis (72), seen in a direction perpendicular to the treatment axis (72), which is smaller than 25% of a maximum distance between two predefined locations (74) in the array, seen in a direction parallel to the treatment axis (72).

Abstract: The present application relates to a device for cutting hair comprising a skin contacting face (3) that is placed against a surface of the skin (6) of a user during use. The device also has an optical system configured to direct a cutting laser beam (8) across a cutting zone (5) parallel to and spaced from said skin contacting face to cut hairs extending into the cutting zone. Also provided is a laser positioning mechanism which is arranged so that, during use of the device, the distance (H1) between said cutting laser beam and said skin contacting face is changed to maintain a predetermined distance between the cutting laser beam and the surface of the skin of a user.

Abstract: The present application relates to a cutting head for a device for cutting hair. The cutting head has a laser generator (2) and an optical system (3). The optical system is configured to focus a laser beam (4) generated by the laser generator and direct the laser beam along an optical axis (16) across a cutting zone (8) in the cutting head. The laser generator and optical system are configured such that, in a focus spot (15) of the laser beam, a dimension of the focus spot, a power density of the laser beam and the numerical aperture of the laser beam are such that, when a hair is received in the cutting zone, the power output of the laser generator is minimised whilst ensuring that, for a predetermined exposure time, the hair received in the cutting zone is cut by optical absorption. The present application also relates to a device for cutting hair and a method of controlling a cutting head for a device for cutting hair.

Abstract: The invention relates to a method of releasing chemical compounds. The method includes distributing containers encapsulating a chemical compound over hair, said containers being configured to release the chemical compound upon reaching a transition temperature, and heating the hair to a predetermined temperature equal to or higher than the transition temperature. The heating of the hair enables heat transfer from the hair to one or more of the containers that are in proximity of the hair,whereby the one or more containers reach the transition temperature and release the chemical compound. In this manner, only those containers that are in close proximity to the hair can be heated up to their transition temperature and release the compound. Consequently, the compound is only released locally where the hair is present, while other skin areas where the hair is not present are protected against the potentially negative side effects of the compound.

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).

Abstract: A skin treatment system comprising a light based skin treatment device (10, 20, 30) is provided. The device (10, 20, 30) comprises a treatment light source (18) for providing a treatment light beam (21) for treating hair or skin tissue, a transparent exit window (14) for allowing the treatment light beam (21) to leave the device (10, 20, 30), and an exit location control unit (17) for controlling a position for the treatment light beam (21) to pass through the exit window (14). The system further comprises a detection light source for providing a detection light beam.

Abstract: A cutting head for a device for cutting hair is disclosed. The cutting head has an optical system configured to direct a laser beam along an optical axis across a cutting zone within the cutting head. The optical system has a variable focus lens configured to control the position of the focal point of the laser beam along the optical axis within the cutting zone.

Abstract: A shaver is disclosed that comprises a handle (12) and a cutting head (13) that are arranged to move relative to each other via a rotational and/or translational axis (16,17). This movement facilitates skin contour following during shaving to achieve a close cut. The handle (12) comprises a laser source that emits a laser beam and the shaver has an optical system that includes optical elements (23,25,26,37,40,42) to direct a part of a laser beam so that it coincides with the rotational axis and/or is parallel to the translational axis. In this way, when the cutting head (13) is moved the optical alignment between the laser source, optical elements (23,25,26,37,40,42) and cutting zone (28) does not change.

Abstract: The present application relates to a cutting head (1) for a device for cutting hair. The cutting head has an optical system (3) which directs a laser beam (7) across a cutting zone (8) in the cutting head. The laser beam has a fast and a slow axis. The optical system has a focus lens (6) configured to form a first focal point (11) of the laser beam in the cutting zone. In one embodiment, the optical system (3) also has a focusing element (15) which refocuses the laser beam to form a second focal point (16) of the laser beam in the cutting zone. In another embodiment, the focus lens forms a focal length of the laser beam in the cutting zone along its fast axis which is greater than a focal length of the laser beam in the cutting zone along its slow axis.

Abstract: A cutting element for a cutting head for a device for cutting hair is disclosed. A laser beam is directed across a cutting zone, in the cutting head, substantially parallel to a user's skin. The laser beam has an effective cutting region in which the laser beam is of a sufficient intensity to cut hair entering said region. The cutting element has a guard adjacent to the cutting zone to contact a user's skin and space the laser beam there from. The guard has a non-planar shape in a direction extending across the cutting zone so that it substantially follows the contours of an edge of the effective cutting region of the laser beam to reduce any variation in the distance between the edge of the effective cutting region and the user's skin across the length of the cutting zone.

Abstract: A light based skin treatment device (10, 20) is provided, comprising a light source (18) for providing an incident light beam (21) for treating a skin (30) by laser induced optical breakdown (LIOB) of hair or skin tissue, a transparent exit window (14) for allowing the incident light beam (21) to exit the device (10, 20), and an optical system for focusing the incident light beam (21) into a focal spot (221, 222) in the hair or skin tissue outside the skin treatment device (10, 20).

Abstract: The invention relates to a system and method for removing hair. The hair removal system comprises a hair detection device and a hair removal device (20; S3) operatively coupled to the hair detection device, wherein the hair detection device comprises an imaging device comprising a first image sensor (12; S1) which is constructed and arranged to detect an image of a part of a skin (30) to be treated, and a control unit (18) adapted to discern, in the image, a hair (32) on the part of the skin (30), and operatively coupled to the hair removal device (20; S3) so as to control its operation, characterized by preventing means coupled to the control unit (18) and being adapted to disable the hair detection device or the hair removal device during a preventing period after the control unit has discerned the respective hair for the first time.

Abstract: Apparatus for determining where to locate a measuring device (3) on skin, the apparatus having a muscle tension sensing device (1) arranged to sense muscle tension at different locations on the skin, and a processor (2) for determining and outputting an indication of where to locate the measuring device on the muscle, based on the sensed muscle tensions. This can help make the skin measurements such as non invasive glucose measurements more consistent, and more accurate.

Abstract: A device for analyzing a material, the device having a photo acoustic generator (40) for generating pressure waves in the material by pulsed illumination by a light source, and a sensor (20, 30, 50) for producing a signal using self mixing interferometry, the signal representing displacements of the material due to the pressure waves, and a signal processor (60) for processing the signal to analyze the material. This combination of photo acoustic stimulation and self mixing interferometry sensing helps reduce or avoid errors or distortions caused by sensor contact on the material, and can provide a better ratio of sensitivity for a given degree of compactness of the device.