Halazonetis, Thanos DLiani, AndreJenkins, NathanBrugger, JuergenPataky, Kristopher2017-06-132017-06-132017-06-132010https://infoscience.epfl.ch/handle/20.500.14299/138310The present invention is directed to a collimator that comprises grooves or channels in the submicrometer to micrometer range. The present invention is also related to uses of a collimator and collimator holder as described herein as well as apparatuses comprising the same.patentUS7916839US201001464241530292