Plane Grating Monochromator

Variable included angle monochromators, usualy refered to as plane grating monochromators (PGM), allow for a fixed focal length as a function of photon energy. PGMs combine ultra-high precision, repeatability and stability with a robust design for safe and reliable operation. Special attention is paid to the mirror and grating holders, which are designed to minimize deformations of the optical surfaces.