A device configured to cut hair using laser light includes a handle portion and a shaving portion. The handle portion includes a battery and a laser light source. The laser light source is coupled to and configured to receive power from the battery. The laser light source is also configured to generate laser light having a wavelength selected to target a predetermined chromophore to effectively cut a hair shaft. The shaving portion includes a support and a single fiber optic supported by the support. The fiber optic has a proximal end, a distal end, an outer wall, and a cutting region positioned towards the distal end and extending along a portion of the side wall. The fiber optic is positioned to receive the laser light from the laser light source at the proximal end, conduct the laser light from the proximal end toward the distal end, and emit the light out of the cutting region and toward hair when the cutting region is brought in contact with the hair.

A hair cutting device of the present disclosure comprises an optical waveguide and a holding member that holds the optical waveguide. The optical waveguide comprises a light irradiator. The light irradiator irradiates hair protruding from skin with light to cut the hair. The holding member holds the optical waveguide in such a way that the light irradiator is exposed from at least one surface. As a result, even when the hair or the skin comes in contact with the light irradiator, misalignment or the like of the optical waveguide hardly occurs. This results in the improved hair cutting device being provided.

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 $\frac{1}{{\mathrm{NA}}^2}\sqrt{\frac{2E_p{\mathrm{NA}}^2}{F_{\mathrm{thresh}}}-M^2{}^2}$
wherein NA is a numerical aperture of the incident light beam leaving the device (10), E.sub.p is a pulse energy (J) of the incident light beam (21), F.sub.thresh is a fluence threshold (J/m.sup.2) of the exit surface, M.sup.2 is a beam quality of the incident light beam (21) and is a wavelength (m) of the incident light beam (21).

Embodiments of the present invention generally relate to methods, devices, and systems for reducing a pigmentation of a skin of a patient. In some embodiments, freezing of the skin may be desirable to effect the hypopigmentation of the skin of the patient. Generally, embodiments may limit supercooling (or promote freezing) of the skin of the patient during a cooling treatment. In some embodiments, coupling fluids are provided to reduce a thermal contact resistance between a cooling treatment probe and the skin of the patient to improve cooling treatment. Optionally, a fluid carrier may be provided to help retain the coupling fluid at the treatment site. In some embodiments, the coupling fluid may include ice nucleating agents to promote ice crystal formation in the coupling fluid during cooling treatment. The ice crystal formation in the coupling fluid may progress into the skin to limit supercooling of the skin during treatment.

A portable depilation instrument includes a shell, a cold compress portion, and an emitter. The shell defines an accommodating space. The cold compress portion is exposed from the shell and configured to contact skin of a user. The emitter is arranged in the accommodating space and located on a side of the cold compress portion facing away from the skin of the user, and the emitter is configured to emit light that irradiates the skin of the user. The portable depilation instrument defines a first channel and a second channel inside the shell, allowing external cooling medium entering the shell to separately flow through the first channel to cool the emitter and flow through the second channel to cool the cold compress portion.

A device configured to cut hair using laser light includes a handle portion and a shaving portion. The handle portion includes a battery and a laser light source. The laser light source is coupled to and configured to receive power from the battery. The laser light source is also configured to generate laser light having a wavelength selected to target a predetermined chromophore to effectively cut a hair shaft. The shaving portion includes a support and a single fiber optic supported by the support. The fiber optic has a proximal end, a distal end, an outer wall, and a cutting region positioned towards the distal end and extending along a portion of the side wall. The fiber optic is positioned to receive the laser light from the laser light source at the proximal end, conduct the laser light from the proximal end toward the distal end, and emit the light out of the cutting region and toward hair when the cutting region is brought in contact with the hair.

The invention is a handheld device that utilizes light for skin treatment. It consists of a handle with a power source, a user interface, and at least two capacitors. Connected to the top surface of the base unit is a head with at least two flash lamps and at least two reflectors. The device includes a control unit that regulates the voltage on the discharge capacitors to control the light energy from each flash lamp. Additionally, the device comes with an exchangeable cartridge, with each type of cartridge featuring a unique window layout and electronic chip containing information on lamp activation.

A hair cutting member includes a light emitting module and a connecting member. The light emitting module includes an optical waveguide including a core, and a retaining member retaining the optical waveguide with at least a portion of the core being exposed so as to apply light to hair growing on a skin. The connecting member is integrally joined to the light emitting module with the connecting member retaining an end of the optical waveguide, and positions the core with respect to light introduced into the optical waveguide. The connecting member is mechanically connectable to a connection target. The core is configured so that light is introduced from an end thereof that faces the connection target. The technology of the present disclosure improves ease of assembly of a hair cutting member, a device body of a hair cutting device, and a hair cutting device.

A portable depilation instrument includes a shell, and a depilation mechanism and a heat dissipation mechanism inside the shell. The shell is provided with at least two outlets and one inlet, the shell introduces an external cooling medium from the inlet, the heat dissipation mechanism includes a heat conductive component, the depilation mechanism includes a refrigeration element and an emitter, the heat conductive component isolates the refrigeration element from the emitter in two mutually sealed channels, namely, a first channel and a second channel, the first channel and the second channel are respectively in communication with two outlets, and one of the outlets allows the first channel or the second channel to pass through inside of the entire shell from one end to the other end. Due to complete isolation and a push force, air can be discharged only from a respective corresponding outlet after a heat exchange.

Proposed is a laser apparatus capable of replacing laser wavelengths, and more specifically, a laser apparatus capable of replacing laser wavelengths that includes a plurality of laser output modules which output laser beams having different wavelengths from each other and enables a wavelength of an output laser beam to be changed by switching between the plurality of laser output modules. The laser apparatus capable of replacing laser wavelengths includes: a portable main body having a battery; a laser output module that is detachably coupled to the main body and outputs a laser beam; and a head cover that is detachably coupled to a front side of the laser output module by a magnetic force. The main body has a plurality of ball plungers, and the laser output module has one coupling location adjusting groove into which all of the plurality of ball plungers are inserted.