McPherson designs and manufactures scanning monochromators, flat field imaging spectrographs, vacuum monochromators, and measurement systems for reflectance, transmittance, and absorbance testing. It provides accessories, including light sources, detectors, readout systems, data acquisition software, fiber optics, sample chambers, and light collection assemblies (telescopes and collimators). Its monochromators, spectrographs, and spectroscopy systems used for industrial OEM and research applications. The company’s unique components and systems are used in research applications ranging from lasers and lithography, solar, and energy to analytical and biomedical instrumentation. McPherson is a privately held corporation, founded in 1953 and based in Chelmsford, Massachusetts