Model 209 Czerny-Turner Monochromator
for High Resolution Spectroscopy
- Exceptional Spectral Resolution
- Patented "Snap-In" gratings
- Imaging Optics & Large focal plane
- Rugged Construction with Multiple slit locations
- Extended wavelength range setting
- Optional equipment includes Model 608 prism predisperser, oversize Echelle gratings and Double Resolution / Double Pass optics
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McPherson, Inc. Research Grade Czerny-Turner Monochromators are available in many different focal lengths and with many different options. Chances are good that we have one just right for your application. Models ranging from 0.67-m to 2-meter focal lengths share a wealth of features.
Used in air the spectral range of these instruments extends from 185-nm to 78-µm, and with vacuum down to 105-nm (depends on the grating.) For intermediate ranges a purge gas can be used (Nitrogen, for example.) McPherson SNAP IN gratings allow the alignment-free use of many different gratings. Easily view a wider spectral range or obtain higher resolution! You can retrofit years later and not have to worry about alignment with the McPherson SNAP IN approach. Our dual grating turret also accepts these easy to exchange gratings.
McPherson optics are Aluminum coated with a top layer of Magnesium Fluoride. This coating provides extremely good response in a broad spectral range. If required by your application other coatings (Gold, Silver, Aluminum, etc.) can be provided.
Well equipped, these instruments feature: multiple entrance and exit ports, high precision wavelength drives, extended range operation, Echelle, and oversize grating mounting capabilities. Optional features include grating turrets, imaging optics, multi-source, and multi-detector turrets further increasing versatility. See the features sheet to learn more.
PDF format Data Sheet for the Model 209 available here
The Model 209 offers the user high spectral resolution. We also make the Model 209, and all the long focal length Czerny-Turner models, in vacuum compatible versions.
Specifications
McPherson Model 209 1.33-meter focal length f/9.4 Monochromator
| Focal Length | 1.33-meter, Czerny Turner design Spectrometer with Patented "Snap-In" gratings |
| Slit Locations | Axial and lateral with optional extra entrance and exit port selection mirrors |
| f / No. | 9.4 (11.6 with smaller grating) |
| Grating Size | 120 x 140-mm (or 110 x 110-mm) - Echelle gratings up to 220-mm wide |
| Wavelength Accuracy | +/-0.05 nm (with 1200 G/mm grating) |
| Wavelength Reproducibility | +/- 0.005 nm (with 1200 G/mm grating) |
| Focal Plane | 50-mm maximum width, multiply dispersion by the width of your detector for range |
| Wavelength Range | refer to grating of interest for range, in extended position increase top limit 20% |
Performance of the Model 209 with various gratings:
| Grating (G/mm) (others available)
| 2400 | 1800
| 1200 | 600
| 300 | 150
| 75 | 20
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| Wavelength Range from 185 nm to
| 650 nm | 860 nm
| 1.3 um | 2.6 um
| 5.2 um | 10.4 um
| 20.8 um
| 78 um
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| First Order Littrow Blaze | 240 nm
| holo | 250 nm
| 300 nm | 750 nm
| 1.25 um
| 2.0 um
| 45 um
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300 nm |
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300 nm
| 500 nm | 1.0 um
| 2.5 nm | 3.0 nm
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| holo
| | 500 nm
| 750 nm | 3.0 um
| 4.0 um | 8.0 um
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| | 750 nm
| 1.0 um | 4.0 um
| 6.0 um | 10.0 um
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| | 1.0 um
| 1.85 um
| | 8.0 um
| 12.0 um
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| Resolution (nm) at 313.1 nm
| 0.005 |
0.007 |
0.01 |
0.02 |
0.04 |
0.08 |
0.16 |
0.60 |
| Dispersion (nm/mm) | 0.31
| 0.41 | 0.62
| 1.24 | 2.48
| 4.96 | 9.92
| 37.2
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