DEVICE FOR SKIN LIGHT-BASED CARE THAT PREVENTS LIOB IN AIR Russian patent published in 2017 - IPC A61B18/20 

FIELD: physics.

SUBSTANCE: device of skin light-based care comprises a light source for providing the pulse incident beam for skincare by the laser induced optical breakdown (LIOB) of hair or skin tissue, a transparent exit window for allowing the incident beam out of the device, and an optical system for focusing the incident beam in the focal spot in hair or skin tissue outside the skincare device. The exit window comprises an outer surface having such optical dispersion properties that for the predetermined power and pulse duration of the incident light beam, when the outer surface is in contact with the medium one having a refractive index equal to the refractive index (n1) of the exit window, the focal spot size is sufficiently small that the power density of the incident light beam in the focal spot exceeds the threshold value for inducing the LIOB in the focal spot, and when the outer surface is in contact with the medium one having a refractive index equal to the refractive index (n2) of air, the focal spot size is sufficiently large that the power density of the incident light beam in the focal spot does not exceed the threshold value for inducing the LIOB in the focal spot.

EFFECT: increasing the efficiency of the device.

11 cl, 6 dwg