Illumination system comprising a light guide having a diffuser element

An illumination system, comprising:

• at least one light source;
• a light guide having a light input face, at a proximal end, a distal end, and a longitudinal axis between the proximal and distal ends, the proximal end is connectable to the at least one light source;
• and
• a diffuser element having an active length,
• wherein the distal end of the light guide extends into the diffuser element perpendicularly with respect to the input face, wherein the diffuser element emits light laterally with respect to the longitudinal axis over the active length, wherein the diffuser element has at least one diffuser base body that comprises a matrix with at least one scattering element, wherein the diffuser element is enclosed at least in sections on a solid encapsulation, wherein the solid encapsulation is configured as a multipart or multilayer structure comprising at least a first and a second encapsulating tube and/or layer, wherein the second encapsulating tube and/or layer surrounds at least in part the first encapsulating tube and/or layer, wherein the first encapsulating tube and/or layer is transparent, wherein the second encapsulating tube and/or layer is translucent or scattering, and wherein the second encapsulating tube and/or layer surrounds the first encapsulating tube and/or layer and the refractive index of the second encapsulating tube and/or layer is higher than the refractive index of the first encapsulating tube and/or layer.