Optical assembly for use in a skin treatment device

Abstract

Provided is an optical assembly (1) for use in a skin treatment device (2), and the use thereof in a treatment method. The optical assembly (1) comprises a light source (10), a first prism (11) and first and second guiding elements (12) and (13) with enclosed reflective faces disposed facing each other. The first prism (11) includes a first surface (111), a second surface (112) inclined with the first surface (111) and a third surface (113) adjoining the first (111) and the second (112) surfaces. The first guiding element (12) is arranged to guide the light transmitted from the light source (10) through the first surface (111) of the first prism. The second guiding element is further arranged to receive through the second surface (112) of the first prism (11), the light reflected from the third surface (113) of the first prism and output the received light for illuminating the skin. The first surface (111) and the second surface (112) of the first prism (11) are separated from the first guiding element (12) and the second guiding element (13), respectively, by a refractive index interface and act as total internal reflection surfaces.

Dependencies are inferred from the claim text.