S202 Modular OEM-spectrograph 

The modular OEM-spectrograph S202 is an attractive alternative to a scanning monochromator for purposes of elemental analysis with spark, arc, laser and other excitation.

The patent double-dispersive optical scheme allows obtaining a compact design, high optical efficiency and low stray light.

Absence of any moving parts ensures high mechanical and thermal stability. The most popular diffraction grating 1200 gr/mm provides the multichannel array bandpass 40nm with dispersion 1,5 nm/mm and spectral resolution better than 50 pm.

Advantages:

  • rigidness and thermal stability

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  • no moving elements
     
  • modular design

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  • low scattered light

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  • uniform dispersion within the flat field

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  • choice of adapters for Customer's detectors

Specifications of the S202 spectrograph

Optical scheme double dispersive
Focal length 404mm
Aperture ratio  F# 1 : 5.9
Flat field 30 x 5 mm
Entrance slit fixed 20 mkm
Diffraction grating 50х50х10mm, one of the listed below

grooves per mm

reciprocal linear dispersion

multichannel array bandpass

2400 gr/mm

0.73 nm/mm

20 nm

1800 gr/mm

1.0 nm/mm

27 nm

1200 gr/mm,

1.5 nm/mm

40 nm

The layout of stacked S202 spectrometers. A version with horizontal arrangement is available.

 

The 304nm -332nm spectrum of low-alloy steel recorded with the S202 as a part of the optical emission system with a spark excitation source.
   
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