MS520
Description
Specification
Configurations
Diffraction gratings
Dimensional drawing of MS520 series monochromator-spectrograph
Dimensional drawing of MS520 series monochromator-spectrograph

Optical system

Optical scheme:Cherny-Turner
(astigmatism-compensated in models MS5201i and MS5204i)
Ports:1 input, 2 output
Wavelength range:185 nm – 60 µm (depends on the type of grating)
F/number (entrance):1/5.4
Focal length (output):520 mm
Scanning range limited by the grating rotation angle*:0 – 1580 nm
Main mirrors:spherical
Stray light:1 х 10-6 (20 nm from laser line 632.8 nm)
Focal plane:28 х 10 mm
  • Optical scheme: Cherny-Turner (astigmatism-compensated in models MS5201i and MS5204i).
  • Ports: 1 input, 2 output.
  • Wavelength range: 185 nm — 60 µm (depends on the type of grating).

  • F/number (entrance): 1/5.4.
  • Focal length (output): 520 mm.

  • Scanning range limited by the grating rotation angle*: 0 – 1580 nm.
  • Main mirrors: spherical.
  • Stray light: 1 х 10-6 (20 nm from laser line 632.8 nm).
  • Focal plane: 28 х 10 mm.

Optical scheme is optimized for:

  • minimization of coma aberration over the whole operating spectral range of the device;
  • elimination of the light re-entrance from two basic mirrors;
  • elimination of the light re-entrance between mirrors of the instrument and input windows of the detectors in the focal plane;
  • a large plane focal field for the whole operating spectral range;
  • astigmatism compensation for the whole operating spectral range by means of special correcting optics (for imaging modifications MS5204i and MS5201i).

Imaging

Model:MS5201MS5204MS5201iMS5204i
Horizontal magnification:1.071.071.071.07
Vertical magnification:1.291.29
Vertical spatial resolution (minimal distance between the edges of the two nearby tracks (in multichannel spectroscopy)):< 20 µm< 20 µm
  • Model MS5201: horizontal magnification = 1.07.
  • Model MS5204: horizontal magnification = 1.07.
  • Model MS5201i: horizontal magnification = 1.07; vertical magnification = 1.29; vertical spatial resolution (minimal distance between the edges of the two nearby tracks (in multichannel spectroscopy)) < 20 µm.

  • Model MS5204i: horizontal magnification = 1.07; vertical magnification = 1.29; vertical spatial resolution (minimal distance between the edges of the two nearby tracks (in multichannel spectroscopy)) < 20 µm.

Spectral image obtained with monochromator-spectrograph MS5204i
Enlarged part of the spectral image
Spectral image obtained with imaging monochromator-spectrograph MS5204i (grating 1800 l/mm, light source – mercury-neon lamp, multi-channel fiber bundle, fiber core diameter 200 µm, CCD pixel size 24×24 µm). 1 – obtained spectral image in full; 2 – enlarged part of the image.
More information about image quality

Optics characteristics

Type of grating:1200 l/mm, λ = 546 nmEchelle, 75 l/mm,
λ = 200 nm, 120 order
Reciprocal linear dispersion:1.55 nm/mm0.11 nm/mm
Spectral resolution:
PMT (slit width 10 µm):0.028 nm0.0020 nm
Digital camera (12 µm pixel):0.034 nm0.0024 nm
Repeatability:± 0.007 nm± 0.0009 nm
Wavelength accuracy:± 0.034 nm± 0.0045 nm
Average scanning step:0.0017 nm
Scanning step at 200 nm:2.25 х 10-4 nm
  • Grating 1200 l/mm, λ = 546 nm: reciprocal linear dispersion = 1.55 nm/mm, spectral resolution of PMT (slit width 10 µm) = 0.028 nm, spectral resolution of digital camera (12 µm pixel) = 0.034 nm, repeatability = ±0.007 nm, wavelength accuracy = ±0.034 nm, average scanning step = 0.0017 nm.
  • Grating Echelle, 75 l/mm, λ = 200 nm, 120 order: reciprocal linear dispersion = 0.11 nm/mm, spectral resolution of PMT (slit width 10 µm) = 0.0020 nm, spectral resolution of digital camera (12 µm pixel) = 0.0024 nm, repeatability = ±0.0009 nm, wavelength accuracy = ±0.0045 nm, scanning step at 200 nm = 2.25 х 10-4 nm.

Drive

Motor:stepper, with fractional steps
Drive:sine
Step size:0.22 arc seconds
Precision:± 1 step
Maximal speed:10000 steps/s
  • Motor: stepper, with fractional steps.
  • Drive: sine.
  • Step size: 0.22 arc seconds.
  • Precision: ± 1 step.
  • Maximal speed: 10000 steps/s.

Diffraction gratings

Size of grating:80 x 70 x 10 mm
Rotation method:about the center of grating working surface
Mounting of gratings in models MS5204 and MS5204iautomated 4-grating turret
Mounting of gratings in models MS5201 and MS5201ipositioner for 1 manually changeable grating
Grating repeatability for automated 4-grating turret (models MS5204 and MS5204i):
wavelength*:± 0.02 nm
vertical image:
typical± 25 µm
maximal± 35 µm
Grating repeatability for positioner for 1 manually changeable grating
(models MS5201 and MS5201i):
wavelength*:± 0.05 nm
vertical image:± 35 µm
  • Size of grating: 80 x 70 x 10 mm.
  • Rotation method: about the center of grating working surface.

  • Mounting of gratings in models MS5204 and MS5204i: automated 4-grating turret.
  • Mounting of gratings in models MS5201 and MS5201i: positioner for 1 manually changeable grating.
  • Grating repeatability for automated 4-grating turret (models MS5204 and MS5204i): wavelength* = ±0.02 nm; vertical image: typical = ±25 µm; maximal = ±35 µm.
  • Grating repeatability for positioner for 1 manually changeable grating (models MS5201 and MS5201i): wavelength* = ±0.05 nm; vertical image = ±35 µm.

Spectral slits

Type of spectral slit:Automated (combined)Manual
Control:automated (drive) or
manually (micrometer)
manually (micrometer)
Width:regulated from 0 up to 2.0 mmregulated from 0 up to 2.0 mm
Parallelism:± 1 µm± 1 µm
Accuracy (slit 1 mm):± 10 µm± 10 µm
Repeatability:± 1 µm± 1.5 µm
Reading accuracy (micrometer):2 µm2 µm
Step size (automated slit):0.5 µm
Height:from 0 to 10 mm – regulated by a diaphragm with division of 0.5 mmfrom 0 to 10 mm – regulated by a diaphragm with division of 0.5 mm
  • Automated (combined) spectral slits: control = automated (drive) or manually (micrometer); width = regulated from 0 up to 2.0 mm; parallelism = ±1 µm; accuracy (slit 1 mm) = ±10 µm; repeatability = ±1 µm; reading accuracy (micrometer) = 2 µm; step size (automated slit) = 0.5 µm; height = from 0 to 10 mm – regulated by a diaphragm with division of 0.5 mm.
  • Manual spectral slits: control = manually (micrometer); width = regulated from 0 up to 2.0 mm; parallelism = ±1 µm; accuracy (slit 1 mm) = ±10 µm; repeatability = ±1.5 µm; reading accuracy (micrometer) = 2 µm; height = from 0 to 10 mm – regulated by a diaphragm with division of 0.5 mm.

Ports

Number of ports:1 input, 2 output
Output port repeatability (automated mirror)*:± 0.03 nm
Switching time (output port):4 s
  • Number of ports: 1 input, 2 output.
  • Output port repeatability (automated mirror)*: ±0.03 nm.
  • Switching time (output port): 4 s.

Integrated shutter

Shut time:~100 ms
Maximal frequency:1 Hz
Control:on-board CPU or TTL-signals from the external device
  • Shut time: ~100 ms.
  • Maximal frequency: 1 Hz.
  • Control: on-board CPU or TTL-signals from the external device.

Control

Central control:on-board CPU
External control:PC
External interface:Ethernet
  • Central control: on-board CPU.
  • External control: PC.
  • External interface: Ethernet.

Dimensions

Overall sizes (L х W х H):635 х 339 х 270 mm
Weight:25 kg (may vary, depends on the configuration)
  • Overall sizes (L х W х H): 635 х 339 х 270 mm.
  • Weight: 25 kg (may vary, depends on the configuration).

* The characteristics are given for grating 1200 lines/mm, wavelength 546 nm.