High-aperture compact spectrometers of the SDH-series are available in two versions: SDH-I model containing one fixed diffraction grating and SDH-IV model with a 4-position manually switchable diffraction gratings turret.
All the spectrometers are equipped with an eight-position filter turret for cutting higher spectrum orders (manual switching), a quartz two-lens condenser f=16mm and optical fiber with the SMA-905 adapter, thus providing users with a possibility of selecting the most convenient method of delivering analyzed radiation to the spectrometer.
The below specifications of the SDH-IV spectrometer contain recommended variants of diffraction gratings/multi-channel detectors combination for the most popular spectral ranges.
| Focal length, mm |
150 |
| F/Number |
1: 4.4 |
| Entrance slit, mm |
0.016 x 3 1) or 0.04 x 3 2) 3) or 0.08 x 3 4) |
| Computer interface |
Full-Speed or High-Speed USB 4) |
| Overal size, weight |
(242 x 280 x 113) mm; 4.85 kg |
| SDH-I Spectrometer |
| Diffraction grating, lines/mm |
300 |
400 |
600 |
1200 |
1800 |
100 |
| Spectral range, nm |
200-1100 |
200-1100 |
200-1100 |
200-1000 |
200-650 |
800-1700 3) |
| Width of the concurrently measured spectral range (average), nm |
620 1)
540 2) |
460 1)
400 2) |
300 1)
260 2) |
130 1)
110 2) |
80 1)
75 2)830 3) |
| Reciprocal linear dispersion (average), nm/mm |
21.3 |
15.8 |
10.2 |
4.0 |
3.0 |
65 |
| Spectral resolution (FWHM, average), nm |
0.42 1)
1.3 2) |
0.32 1)
1.0 2) |
0.22 1)
0.65 2) |
0.09 1)
0.3 2) |
0.06 1)
0.2 2) |
4.0 3) |
| SDH-IV Spectrometer |
| Spectral range 5), nm |
200-1100 |
200-1100 |
800-1700 |
| Linear image sensor |
TCD1304 |
S8378-1024 |
G9212-512S - G9214-512S |
| Active area |
29.1mm, 3648 pixels 8mkm x 0.2mm |
25.6mm, 1024 pixels 25mkm x 0.5mm |
12.8mm, 512 pixels 25mkm x 0.5mm (0.25mm) |
| Diffraction gratings, lines/mm |
900 |
600 |
400 |
300 |
900 |
600 |
400 |
300 |
100 |
400 |
300 |
200 |
| Detectable spectral range, nm |
190-390 |
300-600 |
450-905 |
600-1140 |
200-380 |
300-570 |
450-855 |
600-1140 |
870-1700 |
900-1100 |
1065-1330 |
1295-1700 |
Reciprocal linear dispersion (average),
nm/mm
nm/pixel |
7.0
0.056 |
10.5
0.084 |
15.8
0.126 |
21.1
0.17 |
7.0
0.175 |
10.5
0.26 |
15.8
0.4 |
21.1
0.53 |
65
1.62 |
15.5
0.39 |
20.9
0.52 |
31.7
0.79 |
| Spectral resolution (FWHM, average), nm |
0.18 |
0.28 |
0.42 |
0.54 |
0.44 |
0.65 |
1.0 |
1.3 |
4.5 |
0.95 |
1.3 |
2.0 |
Specifications are subject to change without notice
1) for 29.1mm long linear image sensor with pixel size of 8 μm
2) for 25.6mm long linear image sensor with pixel size of 25 μm
3) for 12.8mm long linear image sensor with pixel size of 25 μm
4) for 12.8mm long linear image sensor with pixel size of 50 μm
5) for obtaining spectral parameters differing from the above, diffraction gratings with a different quantity of lines per mm can be used.
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