Double Dispersive Automated
Monochromator/Spectrograph M833

 

 

  • Standard & crossed spectral slits

  • Filter wheel

  • Optical fibers

  • Aperture matching adapter

  • Light collecting adapters

  • Array detectors & adapters

  • Cassegrain objective

 

M833 Standard version is a unique high-aperture double dispersive monochromator/spectrograph whose compact design combines high spectral resolution intrinsic for long-focus devices and extremely low stray light peculiar to
double schemes.

The Ì833i version (Imaging) ensures absolute astigmatism compensation and extraordinary resolution along the exit slit while maintaining ideal line quality. IMAGING version is arranged by an automated folding mirror switching radiation between two output ports. This allows obtaining Imaging effect at the lateral output port, keeping the standard configuration of the axial output port.

APPLICATIONS

• Raman spectroscopy

• Emission and fluorescent spectroscopy

• Analytical tasks in the range from UV to IR

• Multi-channel & imaging spectroscopy

The unique combination of custom settings obtained in one compact and reliable unit will provide you with new experimental opportunities and let you use the potential of the system you already have to much fuller extent.

The compact high-aperture (F# 1:5.5) long-focus instrument allows you solving tasks demanding high spectral resolution, yet occupies little space in your laboratory and, besides, is mobile.

Extremely low stray light due to the unique double-dispersion scheme and absence of re-reflections greatly extends your opportunities in working with low signals.

Three pairs of gratings (grating type and blaze are at Customer’s choice) are supplied in a standard set and ensure the widest range of applications.

Two input and two output ports (option) can be completed with the full set of accessories manufactured by SOLAR LS: standard and crossed entrance slits, filter wheels, aperture matching units and optical fibers, detector adapters and detectors.

Full computer control: slits, grating turrets and filter wheels, input/output port switching is controlled via Full-Speed USB interface.

The InstrumentManipulator software arranges automated operation of the system, scanning and change of gratings, change of order separating filters, obtaining a panoramic spectrum, mathematical processing, printing and saving for further analysis. Also, it provides wide possibilities for processing and analysis of the spectrum: intensity calibration, automatic search and analysis of peaks, spectra calculator, axonometric spectrum, etc.

At your request, DLL and\or VI program modules are supplied for controlling the instrument via the individually designed software or LabVIEW.

 
Specifications of the Automated monochromator/spectrograph M833
Optical scheme
Spectral range
 
F/Number
Effective focal length
Ports
Flat field
Imaging		 optimized Czerny-Turner with double dispersion
typical 180 – 4800 nm (refer to the specifications below),
up to 40 mkm when the appropriate gratings are used
1 : 5.5
833 mm
two inputs and two outputs
30 x 10 mm
Option. Available for the lateral output port
Diffraction gratings 70 x 70 x 10 mm, automated turret with three pairs of gratings from the list below 1)
    lines/mm 1) 2400 1800 1200 900 600 300
    blaze wavelength, nm 225 400 600 600 1000 2000
   spectral range, nm 190 - 600 253 - 800 380 -1200 506 - 1600 760 - 2400 1500 - 4800
    scanning range, nm 0 - 640 180 - 850 0 - 1280 0 - 1710 0 - 2560 0 - 5120
    reciprocal linear dispersion, average, nm/mm 0,39 0,52 0,78 1,04 1,56 3,12
    multichannel array bandpass, average, nm

11,28 2)

 16.922)
 22.57 2) 33.84 2)
 20 4)
 40 4)
    spectral resolution, average, nm

0,012 2)
0,024 3)

 0,0162)
0,033 3)		 0,024 2)
0,048 3)		 0,032 2)
0,066 3)		 0,1 4)
 0,2 4)
    spectral resolution, average, cì-1

0,8 2)
1,563)

 0,57 2)
1,173)		 0,4 2)
0,783)		 0,3 2)
0,63)		 0,43 4)
 0,2 4)
Integrated shutter Automatically controlled, serves for measuring dark signal
Computer interface Full-Speed USB
Dimensions, mm 500 õ 700 õ 350
                  1) upon your request diffraction gratings differing from the above can be used.
                  2) for detector with 8 um pixel size and 29.1 mm length of active area (resolution is 4 pixels)
                  3) for detector with 25 um pixel size and 25.6 mm length of active area (resolution is 2.5 pixels)
                  4) for detector with 25 um pixel size and 12.8 mm length of active area (resolution is 2.5 pixels)

                  

                   Dispersion depending on Wavelength, nm/mm (cm-1/ mm)

Grating

at 300nm

at 500nm

at 800nm

at 1100nm

2400

0.42 nm/mm
47.4 cm-1/mm

0.34 nm/mm
13.5 cm-1/mm

-

-

1800

0.6 nm/mm
66.6 cm-1/mm

0.53 nm/mm
21.25 cm-1/mm

0.36nm/mm
5.7cm-1/mm

-

1200

-

0.88nm/mm
35.4cm-1/mm

0.77nm/mm
12.1cm-1/mm

0.616nm/mm
5.1cm-1/mm

900

-

-

1.14nm/mm
17.8cm-1/mm

1.0nm/mm
8.4cm-1/mm

600

-

-

1.83nm/mm
28.5cm-1/mm

1.74nm/mm
14.4cm-1/mm


 

 

Below are Raman spectra acquired with the M833i.  532nm laser (TEM00, 10mW) was used as an excitation source. Registration was performed by S7031-1006 Hamamatsu sensor (24uì õ24uì pixel size, 24,6 mm õ1,4mm, ACD 16bit, one-stage Peltier cooling –10 Ñ, binning mode)

Breadboarding block-scheme is shown in Fig.3.




Fig. 1a, b. TeO2 Raman spectra depending on crystal orientation.  Ì833 is the unique instrument allowing to simultaneously observe both Stokes and Anti-Stokes components on the distance of 20 cm-1 from the exitation line.




Fig. 2. Raman spectrum of a single nitron fiber demonstrates characteristic peaks in the range of 300...480 cm-1 with maximum at  405 cm-1.




Fig.3. Breadboarding block-scheme of Raman spectra acquiring. > Raman spectra were collected at 90 deg to the exitation beam using a wide-aperture achromatic condenser PS-3, 600 um dia. optical fiber and the M833i spectrometer (1200 l\mm gratings and S7031-1006 Hamamatsu sensor). Aperture matching system AFA consisting of two objectives-achromats was used to match the optical fiber output (NA=0.2) and the M833i input (F# 5.5). The wide-aperture condenser PS-3 consists of a meniscus and two objectives-achromats and provides wide light collecting angle of 37 deg.


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