Model 219 Vacuum Corrected Czerny Turner Monochromator / Spectrometer
- Large Focal Plane 100 x 35-mm
- Monochromator or Spectrograph Operation
- Patented Corrected Optical System
- SNAP IN gratings simplify exchange
- Internally welded vacuum housing, moving parts outside optics chamber
- Mutliple slit locations
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The Model 219 is a 500-mm focal length f/8.7 vacuum monochromator. It features the McPherson patented Corrected-Loci (US Pat. 3490848) optical design and uses SNAP IN Gratings (McPherson US Pat. 3433557.) The vacuum tight housing is internally welded. All the instruments moving parts are outside the chamber to insure clean, easy evacuation. A large 6-inch focusing mirror delivers a 100-mm wide focal plane at the exit port. The optics in this instrument are coated with Al+MgF2 enhancing the vacuum UV response. Many available accessories allow this instrument to be configured as a monochromator, spectrograph, or polychromator. It will accept CCD, microchannel plate, film and even multi-channel polychromator attachments with up to six (6) 1-inch side on PMTs. It comes standard with a manual drive and a wavelength counter accurate to 1-Angstrom. Grating rotation is controlled by our Model 789A-3 digital stepping drive.The grating holder accepts 50 x 50 mm plane SNAP-IN gratings and can alternately be used with 68 x 68-mm gratings.
Specifications
McPherson Model 219 500-mm focal length f/8.7 Monochromator
| Focal Length | 500-mm, corrected Czerny Turner design |
| Angle between Entrance and Exit Beams | 0, 90 or 180 degrees |
| f / No. | 4.5 |
| Grating Size | 50 x 50-mm |
| Wavelength Accuracy | +/-0.10 nm (with 1200 G/mm grating) |
| Wavelength Reproducibility | +/- 0.005 nm (with 1200 G/mm grating) |
| Focal Plane | 100 x 35-mm maximum |
| Wavelength Range | refer to grating of interest for range |
Performance of the Model 219 with various gratings:
| Grating (G/mm) (others available)
| 2400 | 1200
| 600 | 300
| 150 | 75
| 50 | 20
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| Wavelength Range from 105 nm to
| 600 nm | 1.2 um
| 2.4 um | 4.8 um
| 9.6 um | 19.2 um
| 28.8 um
| 72 um
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| First Order Littrow Blaze | 150 nm
| 150 nm | 150 nm
| 1.0 um | 2.0 um
| 8.0 um
| 18 um
| 45 um
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| 300 nm
| 200 nm | 300 nm
| 2.0 um | 6.0 um
| 12.0 um
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| 300 nm | 500 nm
| 3.0 um |
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| 500 nm | 1.0 um
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| 750 nm | 1.6 um
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| Resolution (nm) at 313.1 nm
| 0.02 | 0.04
| 0.08 | 0.16
| 0.32 | 0.64
| 0.96
| 2.4 |
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| Dispersion (nm/mm) | 0.83
| 1.66 | 3.33
| 6.66 | 13.3
| 26.6
| 40 | 100
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| Wavelength Range at Focal Plane nm | 84
| 168 | 336
| 672 | 1344
| 2688 | 4032
| 10080 |
