US 2019/0167348 A1 · LIGHT BASED SKIN TREATMENT DEVICE

Abstract

A light based skin treatment device comprises a laser light source for providing a pulsed incident light beam for treating skin by laser induced optical breakdown of hair or skin tissue. In one arrangement, a focusing system has a pre-focusing lens for increasing the convergence of the an incident light beam and a skin contact lens having convex light input and light exit surfaces. The focal spot position is controlled by adjusting a spacing between the pre-focusing lens and the skin contact lens. In another arrangement, there is an adjustable lens system before an adjustable focusing system for providing compensation for aberration in the focusing system.

Claims18

Dependent claims

A light based skin treatment device, comprising:

a light source for providing a pulsed light beam for generating a laser induced optical breakdown of hair or skin tissue;
a focusing system for focusing the pulsed light beam into a focal spot in the hair or skin tissue, wherein the focusing system comprises:
a pre-focusing lens for generating a convergent pulsed light beam from the pulsed light beam;
and
a focusing lens having:
a convex light input surface for receiving the convergent pulsed light beam;
a light exit surface for contacting the skin or hair;
a refractive index of 1.4 or higher;
and
a focus controller for controlling a distance of the focal spot to the light exit surface by adjusting a spacing between the pre-focusing lens and the focusing lens.

7 more elements

Dependencies are inferred from the claim text.

Light based skin treatment device

Life of this patent

Light based skin treatment device

Life of this patent

Abstract

Claims18