Patent ID: 8246209

Claim:
An illumination device, comprising: a light source configured for emitting light along a given light path; and a light-pervious light guiding barrel receiving the light source therein, the barrel comprising a plurality of light guiding regions with different light directing and reflecting capabilities, the barrel being rotatable relative to the light source such that each of the light guiding regions can be selectively placed on the light path to direct and reflect the light from the light source; wherein the barrel is substantially a cylinder having an accommodating space defined therein, and a boundary between every adjacent the light guiding regions is substantially parallel to a central axial of the cylinder; wherein the light source comprises a light emitting diode positioned at the central axis of the barrel, the light path being substantially perpendicular to the central axis; and wherein a cross section of each region is circular arc in shape with a subtended angle substantially equal to a light radiation angle of the light emitting diode.