Light measurement metrology equipment supplier !%opsira GmbH%! of Weingarten, Germany, has appointed !%7923%%Lambda Research Corp.%! of Littleton, Mass., as its exclusive distributor in the US. The arrangement will enable Lambda Research’s customers to benefit from opsira’s metrology equipment to import optical parameters directly into their TracePro simulations. The US company’s TracePro software is used for modeling and analyzing the propagation of light in imaging and nonimaging optomechanical systems.