The Wisconsin Alumni Research Foundation of Madison has received US Patent No. 7,722,824, "Synthesis of arrays of oligonucleotides and other chain molecules." The patent claims a method of synthesizing arrays of chain molecules, such as oligonucleotides, in large quantities. The method can be carried out by projecting the molecules onto an active surface using a light-emitting object. Specifically, projection optics mirrors receive the light emitted from the object and image the pattern of the array onto the active surface of the substrate.