To bolster its European presence, !%Radiant Zemax LLC%! of Redmond, Wash., has acquired its longtime UK-based distributor, !%11013%%Optima Research Ltd.%! Financial terms of the agreement were not disclosed. Optima Research will continue to operate as Europe’s local office for sales and support of Zemax 12 optical and illumination design software for flat panel display and LED manufacturers. “Our acquisition formalizes and strengthens the long-standing business relationship between Optima Research and Radiant Zemax,” said Neil Barrett, managing director of Optima Research.