Refractive particle sorting device, especially for diamonds, has an optical sorting arrangement with light sources arranged so that only refracted light from examined particles is detected by an optical sensing means

摘要

Sorting device for sorting refracting particles, especially diamonds, has a conveyer device (2) for transporting particles (4a, 4b) to a separating arrangement (5) with optical sensing means (6). First and second light sources are positioned so that the light emitted from them is not directly detected by the sensing means. The light sensing means is assigned to a passive dark background (7), which is arranged in its the sensing area.