Very High Resolution, 30 - 300 nm Range
Minimal Astigmatism and Polarization
Maximum Flux Density
Optional - Turret, Multiple Ports, UHV
· Very High Resolution, 30 - 300 nm Range
· Minimal Astigmatism and Polarization
· Maximum Flux Density
· Optional - Turret, Multiple Ports, UHV
The 225 1m normal incidence monochromator (NIM) has 15° between entrance and exit slits. This design is also known as the McPherson 15°. Our Normal Incidence Monochromators have been built in focal lengths from 1 to 10.6 meters. They set and transfer standards for national metrology labs around the world. NIST (USA) uses a 2 meter version and the Physikalische Technische Bundesanstalt (PTB, Germany) uses a 1 meter. The 1 m is most popular and is also in use at NASA, JPL, LLNL, Sandia and many other prestigious laboratories
The 2253 features a stainless steel vacuum chamber. This is a very clean design - the wavelength drive is outside the vacuum vessel. It works with single gratings as well as double and triple grating turrets. Use it to vertically or horizontally disperse light according to your space constrains. The grating drive automatically focuses to maintain highest performance throughout the range of interest.
Model 225 PDF Data Sheet
| Optical Design | Normal Incidence |
| Angle of Incidence | 3.25 degrees |
| Focal Length | 3 meter |
| f/no. | 36 |
| Wavelength Range | refer to grating of interest for range |
| Wavelength Accuracy | r+/-0.05 nm (with 1200 g/mm grating) |
| Wavelength Reproducibility | +/- 0.005 nm (with 1200 g/mm grating) |
| Grating Size | single kinematic grating holder, two- and three-grating turret optional |
| Slits | Continuously variable micrometer actuated width 0.01 to 2 mm. Settable height. |
| Vacuum | High vacuum 10E-6 torr standard, UHV optional |
| Focal Plane | 40 mm max. Multiply dispersion of the selected grating by width of your CCD or MCP to determine simultaneous range |
Performance with various diffraction gratings:
| Grating Groove Density (g/mm) | 2400 | 1200 | 600 |
| Spectral Resolution (nm,FWHM) | 0.003 | 0.005 | 0.01 |
| Dispersion (nm/mm) | 0.14 | 0.28 | 0.56 |
| Wavelength Range up to (nm) | 150 | 300 | 600 |
| Holographic or Blaze Optimization: (nm) | Holo | 45** | Holo |
| 80 | |||
| 120 | |||
| 150 | |||
| 250 |
* gratings work best from 2/3 to 3/2 the optimized wavelength
