McPherson - Model 225 - One-meter Normal Incidence (NIM) Vacuum Ultraviolet Monochromator - Datasheet

Normal incidence designs include the McPherson 15° (classical 1.0 meter focal length) and modern NIM units. The latter features smaller included angles, longer focal lengths (e.g. 3, 4 and 6.65 m) and independent focus and rotation drives.