Diffraction gratings

Universal IMAGING monochromator-spectrographs of MS520 series

Monochromator-spectrograph MS520 series have a unique combination of high-intensity, accuracy and spectral resolution. Large angle of rotation of the grating allows to use Echelle grating, providing extremely high spectral resolution (up to 0.002 nm), as well as extended operating wavelength range for the other gratings.

MS520 are completely automated spectral devices with focal length of 520 mm and F-number of 1/5.4.

High-quality optics and wide choice of diffraction gratings provide devices operation in a wide range from 185 nm up to 60 µm (depending on the selected grating).

M520 series monochromator-spectrographs are based on Cherny-Turner asymmetric scheme, aberrations are minimized and re-reflections from diffraction gratings and mirrors are excluded.

Model MS5201i and model MS5204i have the astigmatism-corrected optics what makes these devices applicable in multi-channel spectroscopy.

Monochromator-spectrographs of MS520 series have one input port and two output ports. Installation of an output port is realized with an automated mirror. Either output spectral slits or multi-channel detectors can be installed on each of the output ports.

We offer monochromator-spectrographs of MS520 Series with two types of input and output spectral slits: manual, operated with a micrometer screw and automated (combined), when the slit width is operated automatically or manually (with micrometer).

A wide choice of changeable gratings gives the best combination of high energetic efficiency and maximal spectral resolution for different spectrum areas.

We also offer a wide range of additional accessories for monochromator-spectrographs of MS350 series: filter Wheel FWS-8A, -6A, fast shutters, fiber optics with adapters, input and output condensers, detectors and etc.

Extremely high spectral resolution – 0,002 nm for Echelle grating – in combination with a variety of configurations and accessories make monochromator-spectrographs of MS520 series the ideal devices for high resolution spectroscopy and Raman spectroscopy.

Benefits of MS series monochromator-spectrographs
Автоматизированный IMAGING монохроматор-спектрограф MS520
Оптическая схема MS5201 и MS5201i с одной дифракционной решеткойОптическая схема MS5204 и MS5204i с четырьмя дифракционными решетками

Models of monochromator-spectrographs of MS520 series

Diffraction unitSingle-position holder for manually changeable gratingsSingle-position holder for manually changeable gratingsFour-grating turretFour-grating turret
OpticsStandardAstigmatism-compensated (Imaging)StandardAstigmatism-compensated (Imaging)
  • Model MS5201:
    diffraction unit = single-position holder for manually changeable gratings; optics = standard.
  • Model MS5201i:
    diffraction unit = single-position holder for manually changeable gratings; optics = astigmatism-compensated (Imaging).
  • Model MS5204:
    diffraction unit = four-grating turret ; optics = standard.
  • Model MS5204i:
    diffraction unit = four-grating turret ; optics = astigmatism-compensated (Imaging).

In MS520 monochromator-spectrograph models with the standard optics (modifications MS5201 and MS5204) a flat entrance deflecting mirror is used, and in the astigmatism-compensated devices (modifications MS5201i and MS5204i) a cylindrical mirror is used as an entrance deflecting.

As well as in all Czerny-Turner design spectral devices, in monochromator-spectrographs of MS520 series an axis of the diffraction gratings rotation goes through the center of grating operating surface and coincides with the direction of grooves. This fact provides the stability of the geometry of the beams for formation of a flat and fixed focal field. The image quality in the whole flat focal field is optimized due to the use of an asymmetric scheme and use of a focusing large-size mirror allows one to use the whole focal field width without vignetting.

In MS5204 and MS5204i models the gratings rotation axes are arranged perpendicular to the spectrum scanning axis, providing a high repeatability of wavelength setting at replacing of gratings.

SOL instruments methodical materials: