Monochromator-spectrograph M266 is available for order in the double-dispersive scheme modification – Double M266: in that case, the output slit of the first M266 becomes the input slit of the second M266. Due to larger focal length and dispersion addition, the twice-better spectral resolution and lower stray light are achieved. Effective transmission of radiation from a source into monochromators can be realized with variety of options, such as spherical and toroidal optics, optical fibers. Upon your request, spectral slit with blackened blades can be supplied.
| Optical scheme | Optimized Czerny-Turner with one input and two outputs | ||||||||
| Spectral range | Typical 190 – 3600 nm, Extended up to 40 µm (upon request) |
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| F/Number | 1 : 3.8 | ||||||||
| Total focal length, mm | 568 | ||||||||
| Flat field on the lateral port of the first M266, mm | 30 x 10 | ||||||||
| Flat field on the lateral port of the second M266, mm | 6 x 10 | ||||||||
| Imaging | Option. Available for the both output ports simultaneously. | ||||||||
| Diffraction gratings | 50x50x10 mm, one grating or a turret with 4 gratings from the list below 1) | ||||||||
| — Grooves/mm | 2400 | 1800 | 1200 | 600 | 400 | 300 | |||
| — Reciprocal linear dispersion (average) nm/mm2) | 0.79 | 1.06 | 1.59 | 3.19 | 3.16 | 4.8 | 4.7 | 6.37 | 6.32 |
| — Blaze wavelength, nm | 225 | 270 | 400 | 750 | 1000 | 800 | 1700 | 1500 | 2000 |
| — Spectral range, nm3) | 190-450 | 190-540 | 265-800 | 500-1500 | 660-1800 | 530-1600 | 1130-2600 | 1000-3000 | 1330-3600 |
| — Multichannel array bandpass on the output of the second M266 (average), nm |
3.8 4) | 5.2 4) | 7.6 4) | 15 4) | 8 4) | 23 4) | 12 5) | 16 5) | 16 5) |
| — Spectral resolution on the output of the second M266, nm |
<0.05 4) | <0.08 4) | <0.11 4) | <0.22 4) | <0.22 4) | <0.35 4) | <0.35 5) | <0.47 5) | <0.47 5) |
| Entrance/exit slits | Refer to М266 specifications | ||||||||
| Intermediate slit width, mm | 5 | ||||||||
| Filter wheel | Refer to М266 specifications | ||||||||
| Integrated shutter | Computer controlled, serves for dark signal measuring | ||||||||
| Computer interface | High-Speed USB интерфейс | ||||||||
1) Upon your request diffraction gratings differing from the above can be used
2) Reciprocal linear dispersion is indicated for blazing wavelength
3) Wavelength range for which diffraction efficiency exceeds 40%
4) For detector with 24 µm pixel size and 24.5 mm length of active area
5) For detector with 25 µm pixel size and 12.8 mm length of active area
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