Patent ID: 10987701

Abstract:
A sorting or classifying apparatus comprising an illumination device for providing illumination or foreground illumination, the illumination device comprising a reflector (61) which has a reflecting surface (63) providing a reflection envelope, a first light source (70) which is disposed in spaced relation in front of the reflecting surface (63) and provides light of a first spectral output to the reflecting surface (63) for reflection thereby and which first light source (70) comprises a plurality of light elements or incandescent lamps (72), wherein the light elements or lamps (72) are disposed on or near a focal axis (X) of the reflector (61), and a second light source (71) which is disposed in spaced relation in front of the reflecting surface (63) and provides light of a second spectral output, different to the first spectral output to the reflecting surface (63) for reflection thereby and which second light source (71) comprises a plurality of light elements or light-emitting diodes (LEDs) (75) arranged along at least one row (77a, b) which extends along the length of the reflecting surface (63) and is arranged in a direction substantially parallel to the focal axis (X) of the reflector (61), optionally the first light source (70) is a source of near infra-red (NIR) light and the second light source (71) is a source of visible-spectrum light.