ILLUMINATION SYSTEM FOR USE IN A STEREOLITHOGRAPHY APPARATUS

摘要

An illumination system (30), comprising: a plurality of light-emitting diodes (LEDs) (34), each LED having at least a first, light-emitting surface (36) and a second surface (37), at least one of the first and the second surface being substantially flat; a plurality of electrical pathways (56), selectively connected to the respective LEDs, such that each LED can be individually controlled; and a levelling surface (46, 52), wherein the levelling surface is substantially flat and in levelling contact with the at least one substantially flat surface (37, 36) of each LED, such that a two-dimensional array of LEDs extends in a plane parallel to the levelling surface.