The Board of Sigma Koki Co. Ltd. (Japan – Tokyo), the global manufacturer of optics and photonics products and instruments, has appointed Scott Rudder as President and CEO of its OptoSigma Corporation (USA – Santa Ana, California) affiliate. The former President & CEO, Guy Ear will assume the role of Chairman of the Board while continuing as President and CEO of OptoSigma Europe SAS (France – Les Ulis, Paris).