Model 225 Vacuum Monochromator

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Model 225 Vacuum Monochromator
Minimal Astigmatism and Polarization
Maximum Flux Density
Monochromator or Spectrograph Operation
Optional - Multiple Port Versions
Optional - Ultra High Vacuum Versions
Optional - Long 3, 4, 5, 6.6m Focal Length Versions

the McPherson 15° ... The 225 1m normal incidence monochromator (NIM) has 15° between entrance and exit slits. This design, also known as the McPherson 15°, uses a spherical grating to collect and focus energy. It provides maximum flux density with minimal astigmatism and polarization. This is an ideal imaging instrument for use with microchannel plate intensified or CCD array detectors. The 225 features a stainless steel vacuum chamber. This is an very clean design - the wavelength drive is outside the vacuum vessel. It works with single gratings as well as double and triple grating turrets. It can be used to vertically or horizontally disperse. The grating drive automatically focuses to maintain highest performance throughout the range of interest. The popular normal incidence design is built in focal lengths of 1m and longer. Resolving powers of 78,000 have been obtained at 46.4nm with the a 6.65m version. The grating rotation is controlled by our Model 789A-3 digital stepping drive.

Gratings are concave ruled replica or holographic. Single grating with kinematic mount standard and double or triple grating turrets are available options.

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