McPherson manufactures tools that measure the frequency and intensity of light wavelengths / rays with good spectral resolution over a wide free range, e.g. monochromators, spectrometers, and spectrographs. McPherson instruments are available for teaching, physics and astronomy applications through the soft X-ray, Extreme, Vacuum Ultraviolet, UV, Visible and Infrared (IR, including MWIR and LWIR) wavelengths.