Patent ID: 9074756
Filing Date: 2015-07-07
Classification: F21V,G02B,G03B,G09F

Abstract:
1. A sorting machine illumination assembly for delivering an elongate illumination as a reference or background illumination for a field of view of an imaging camera or cameras, the illumination assembly comprising: a light guide comprising a mirror box which defines an elongate mirror cavity, which receives an elongate light source therein, and includes an elongate illumination aperture from which an elongate illumination is delivered, the mirror box comprising first and second main mirror sections, forward edges of which define the illumination aperture, and a transmissive diffuser which is located at the illumination aperture to render the illumination diffuse; and an elongate light source located within the cavity along a length of the cavity, wherein the light source has a greater length than the mirror box, whereby regions at the ends of the light source are located outside of the mirror box and not utilized in providing the illumination; wherein the mirror box provides for multiple reflections of light radiated from the light source upstream of the diffuser, thereby providing for homogenisation of the delivered illumination.