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Model 205 Czerny Turner Monochromator / Spectrometer in three versions to suit your experimental requirements
- f/3.2 with selected large gratings for maximum throughput, Model 205f
- f/4.3 with 4-grating turret for wide wavelength ranges, Model 205wr
- f/6.9 with 2-grating turret or single f/4.3 SNAP IN gratings, Model 205
- High Efficiency Broadband Al+MgF2 Coatings
- Precision Micrometer Adjustable Slits
- Dual Turret with "Snap-In" gratings
- Gratings rotate about their apex
- Imaging Optics & Large focal plane
- Rugged Construction with Multiple slit locations
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The three versions of the Model 205 have been developed with researchers to meet the diverse needs of spectral analysis. The half meter focal length is popular. It provides reasonable spectral resolution, throughput and package size. Every lab has room for a half meter monochromator! Each application is unique and the versions of the McPherson Model 205 will allow you to tailor the instrument to produce better data from a given experiment. Wavelengths from 200-nm to 78-um can be covered within the scanning range and with appropriate gratings. All versions can be provided with the 789A-3 digital scan control for scanning or with corrected optics for imaging applications, all but the 205wr can be configured for both.
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The Model 205wr quad, 4-grating turret accepts 110x110mm SNAP IN gratings. This unit is most often integrated into scanning spectral calibration or very wide wavelength range Spectrophotometry applications. For example, with 4 gratings installed, work from the UV to the far or long wave infrared (LWIR) is simplified and throughput is maintained.
The Model 205f uses large 120 x 150-mm gratings to achieve phenomenal light gathering and throughput. The fast aperture ratio is excellent for low light applications, like Raman and photoluminescence. Any time photons are at a premium the Model 205f can help. It can be equipped with the 789A-3 digital scan control for scanning or with corrected optics for imaging applications. |
Specifications
McPherson Model 205 500-mm focal length Monochromator / Spectrometer
| Focal Length | 500-mm, Czerny Turner design Monochromator / Spectrometer |
| Slit Locations | Axial and lateral with optional extra entrance and exit port selection mirrors depending on version |
| f / No. | f/6.9, f/4.3, f/3.2 with turret or single grating holder depending on version |
| Wavelength Accuracy | +/-0.1nm (on counter, with 1200 G/mm grating) |
| Wavelength Reproducibility | +/- 0.005 nm (with 1200 G/mm grating) |
| Focal Plane | 25-mm, multiply dispersion by the width of your detector for range |
| Wavelength Range | refer to grating of interest for range |
Performance of the Model 205 with various gratings:
| Grating (G/mm) (others available) |
3600 |
2400 |
1800 |
1200 |
600 |
300 |
150 |
75 |
50 |
| Wavelength Range from 185-nm to |
430-nm |
650-nm |
860-nm |
1.3-um |
2.6-um |
5.2-um |
10.4-um |
20.8-um |
78-um |
| First Order Littrow Blaze |
holo |
holo |
holo |
holo |
300 nm |
750 nm |
1.25 um |
2.0 um |
45 um |
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240 nm |
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250 nm |
500 nm |
1.0 um |
2.5 nm |
3.0 nm |
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300 nm |
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300 nm |
750 nm |
3.0 um |
4.0 um |
8.0 um |
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500 nm |
1.0 um |
4.0 um |
6.0 um |
10.0 um |
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750 nm |
1.85 um |
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8.0 um |
12.0 um |
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1.0 um |
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| Resolution (nm) at 313.1-nm |
0.016 |
0.02 |
0.03 |
0.04 |
0.08 |
0.16 |
0.32 |
0.64 |
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| Dispersion (nm/mm) |
0.5 |
0.83 |
1.1 |
1.66 |
3.33 |
6.7 |
13.3 |
26.6 |
40 |
Resolution specification set with Model 205, single pass. Performance with 'wr' and 'f' models may vary. Please inquire.
Salient Features
- Outperforms and exceeds specifications of comparable monochromators in throughput, resolution, dispersion, wavelength accuracy, and wavelength reproducibility.
- Exit ports may be equipped with bilaterally adjustable slits, as used in scanning applications, or with adapters for selected CCD or PDA array detectors.
- Holds chosen ruled or holographic gratings. Grating selection for the fast aperture f/3.2 is limited.
- Available with a dual (2) or quad (4) grating turret. Single gratings feature kinematic mounts for ease of installation and exchange. Both types of grating holders permit simple and precise positioning. Additional gratings can easily be installed.
- Robust, high accuracy wavelength drive and mechanical wavelength readout insure easy use. The sine drive delivers a linear relationship between motor motion and wavelength of interest.
- The high precision drive may be actuated manually, via stepper motor controller or from the PC.
- The Models 205 and 205f may be supplied with side and/or front mounted slit assemblies. Side ports are accessed by 90-degree mirror assemblies which are optionally motor driven. The Model 205wr only offers side ports.
- Imaging optical system easily adapts to commercial PDA and CCD type detectors. The mechanical interface for uncommon detectors will be manufactured to order.
- Precision bilaterally adjustable slit assemblies. Width is variable by micrometer from 10-um to 4-mm. The micrometer is directly readable to 10-um. Slit height is adjusted by occulter from 2-mm to 20-mm. The slits may be optionally motor driven.
- The wide range of available accessories allows configuration of optimized systems and facilitates changing experimental needs.
- Heavy duty construction for high stability with respect to vibration and thermal effects.
The McPherson 500-mm f/3.2 Model 205f is available for imaging!
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