AngstromSunTechnologiesInc.isaprivatelyheldcompany,headquarteredinBoston,USA.Thefocusofcompanyistoprovideaseriesofcost-effectiveopticalsolutionsforcharacterizingthinfilmthickness,thickcoatingthickness,theiropticalproperties(refractiveindexNandextinctioncoefficientK),surfaceandinterfacebehavior,alloyconcentrationsandtheiruniformitiesacrosssurface.