Complex sentence: It was sold by a small company in Czechoslovakia and in the United States by Tracor-Northern (later Noran) and used a rotating Nipkow disk to generate multiple excitation and emission pinholes.
Split into simpler sentences: It was sold by a small company in Czechoslovakia and in the United States by Tracor-Northern (later Noran). It uses a rotating Nipkow disk to generate multiple excitation and emission pinholes.