Patent ID: 7419098

Claim:
A graphical code reading apparatus for reading a graphical code on a reflective surface, comprising: a graphical code reader having an illumination source and a detector; and a light scattering chamber disposed between the graphical code reader and the graphical code, the light scattering chamber comprising: an interior portion that receives electromagnetic radiation from the illumination source; a light scattering surface on the interior portion that scatters the electromagnetic radiation emitted from the illumination source; and a transmissive diffuser insert that includes a window, wherein the detector receives a reflected image of the graphical code without the reflected image being impeded by the transmissive diffuser insert, and wherein the transmissive diffuser insert is located within the interior portion of the light scattering chamber, wherein the transmissive diffuser insert is located in an area of the interior portion of the light scattering chamber that is not tapered.