MSDD1000
Description
Specification
Configurations
Diffraction gratings

MSDD1000 series monochromator-spectrographs are double dispersion devices with a great variety of configurations for solving spectroscopy tasks, which require a high resolution, low stray light and high precision. We propose several configurations of the device, a wide choice of diffraction gratings, great number of accessories and two types of the control software.

Choice of configuration:

You can choose necessary configuration of the MSDD1000 series monochromator-spectrograph for your task to be solved from the given below list of options or you can consult our specialists on this issue.

Housing of MSDD1000 series monochromator-spectrographs

  • a housing with embedded controller
  • sine mechanism of grating turning
  • basic mirrors (output and collimator)
  • optical system consisting of two automated flip mirrors
  • two integrated shutters

Housing options:

  • with standard aluminium (Al+MgF2) coated optics
  • with standard gold coated optics
  • with imaging (astigmatism corrected device modifications) aluminium (Al+MgF2) coated optics
  • with imaging (astigmatism corrected device modifications) gold coated optics
  • with interference optics for all housing options, available on request
Housing of monochromator-spectrograph MSDD1000
Housing of monochromator-spectrograph MSDD1000

Diffraction gratings assembly

MSDD1000 series monochromator-spectrographs are available with two types of diffraction grating mounting:

Automated turret for two pairs of diffraction gratings:

Automated turret for two pairs of diffraction gratings in MSDD1000

The automated turret provides switching of gratings by pressing one button of the control PC software. Grating rotation axes in the turret are arranged perpendicular to the spectrum scanning axis allowing a high reproducibility of the set wavelength while the gratings are switched.

Holder for one pair of diffraction gratings:

Holder for one pair of diffraction gratings in MSDD1000

The holder for one pair of diffraction gratings provides easy manual switching of gratings. Gratings are positioned with high accuracy in the holder and no additional alignment of the device is needed while the diffraction gratings are switched.

Input ports and entrance slits of monochromator-spectrograph MSDD1000

MSDD1000 series monochromator-spectrographs of MSDD1002 and MSDD1004 models posses two input ports operating in turn – the axial and the lateral one. Astigmatism-compensated devices (MSDD1002i and MSDD1004i) posses only one lateral port. Selection of the input port is realized by means of the flip mirror.

The input port through which the radiation is delivered to the device is active. On each of the input ports of the monochromator-spectrograph an entrance spectral slit can be installed.

All spectral slits have standard flanges, due to which various accessories (of own production) can be mounted directly to the entrance slit:
  • optical fiber adapter
  • condenser F#-matcher
  • filter wheel
  • fast shutters, etc.

There are two types of slits:

  • Manually operated
  • Automated
Input ports and entrance slits of monochromator-spectrograph MSDD1000
Input ports and entrance slits of MSDD1000

There are three configurations of input ports:

  • One axial input port
  • One lateral input port
  • Two input ports
Input and output ports of monochromator-spectrograph MSDD1000
Input and output ports of MSDD1000

One axial input port:

One axial input port of monochromator-spectrograph MSDD1000

When only one input port is used it is preferably to choose a configuration with axial input port, as in this case no input flip mirror contributing slight losses due to the additional reflecting surface is required.

In the case of configuration with one axial port the lateral input port is covered with a cap.

One lateral input port:

One lateral input port of monochromator-spectrograph MSDD1000

For some applications the lateral input port is required, for example, for monochromators cascading. In configuration with one lateral input port, a fixed flip mirror is used, and the axial input port is covered with a cap.

One lateral input port is used also in the astigmatism-compensated modifications of MSDD1000 monochromator-spectrograph (models MSDD1002i and MSDD1004i).

Two input ports:

Two input ports of monochromator-spectrograph MSDD1000

When both output ports, axial and lateral, are used, the automated input flip mirror is installed in the device for fast and highly-precise switching of ports.

The input port through which the radiation is delivered to the MSDD1000 device is called active.

Integrated shutter of MSDD1000 device

In MSDD1000 series a separate independent light shutter is used for each input port. Inactive input port shutter is automatically blocked, when the active port is selected. Shutters are used for measuring of the background signal or dark signal of photodetectors as well as for protection of photodetectors from high-intensity radiation.

The shutter is automatically shut while zero-order wavelength is setting.

The integrated shutter of the monochromator-spectrograph MSDD1000 is controlled with the control PC software as well as with TTL-signals of the external device.

Output ports

MSDD1000 series monochromator-spectrographs have two output ports – axial and lateral. Selection of the output port is realized with a flip mirror. Either output spectral slits or adapters for multi-channel detectors can be installed on each of the output ports.

MSDD1000 devices can be supplied with the following configurations of output ports:
  • One axial output port
  • One lateral output port
  • Two output ports
Two output ports of monochromator-spectrograph MSDD1000
Two output ports of monochromator-spectrograph MSDD1000

One axial output port:

One axial output port of monochromator-spectrograph MSDD1000

The configuration with one axial output port is usually applicable in the case when only one detector is used.

When only one axial output port is used, the lateral output port is covered with a cap.

One lateral output port:

One lateral output port of monochromator-spectrograph MSDD1000

The lateral output port should be used for the detectors with no opportunity of being installed on the axial output port of the device due to their dimensions. In configuration with one lateral output port a fixed flip mirror is used and the axial output port is covered with a cap.

Two output ports with mirror:

Two output ports with automated flip mirror in monochromator-spectrograph MSDD1000

When both output ports are necessary, the automated flip mirror is installed in the device for fast switching of ports. High precision of the flip mirror positioning (better than 0.01 nm for 1200 l/mm grating) allows to obtain reproducible spectra while switching the output ports.

Spectral slits

Monochromator-spectrographs of MSDD1000 series have two types of input and output spectral slits:
  • manually operated
  • automated
Automated spectral slit of MSDD1000 with attached optical fiber adapter
Automated spectral slit of MSDD1000 with attached optical fiber adapter

Additional equipment:

All spectral slits have standard flanges which allow attachment of various accessories (of own production) directly to the entrance slit:
  • optical fiber adapter
  • condenser F#-matcher
  • filter wheel
  • fast shutter
  • detectors based on photodiodes and PMT
  • adapter for IR detector
  • other custom accessories

Manually operated spectral slits:

Ручная спектральная щель монохроматора-спектрографа MSDD1000
Widthsmoothly regulated
from 0 up to 2.0 mm
Parallelism± 1 µm
Accuracy
(at slit width of 1 mm)
± 10 µm
Repeatability± 1.5 µm
Reading accuracy (micrometer)2 µm
Height10 mm
  • Width: smoothly regulated from 0 up to 2.0 mm.
  • Parallelism: ± 1 µm.
  • Accuracy (at slit width of 1 mm): ± 10 µm.
  • Repeatability: ± 1.5 µm.
  • Reading accuracy (micrometer): 2 µm.
  • Height: 10 mm.

The slit width is operated manually with the micrometer screw. The slit height is regulated by a diaphragm in the range of 0 – 10 mm.

Automated spectral slits:

Автоматизированная спектральная щель монохроматора-спектрографа MSDD1000
Widthsmoothly regulated
from 0 up to 2.0 mm
Parallelism± 1 µm
Accuracy
(at slit width of 1 mm)
± 10 µm
Repeatability± 1 µm
Reading accuracy (micrometer)2 µm
Step size0.5 µm
Height10 mm
  • Width: smoothly regulated from 0 up to 2.0 mm.
  • Parallelism: ± 1 µm.
  • Accuracy (at slit width of 1 mm): ± 10 µm.
  • Repeatability: ± 1 µm.
  • Reading accuracy (micrometer): 2 µm.
  • Step size: 0.5 µm.
  • Height: 10 mm.

In the automated spectral slits a stepper motor is used for control over the width of blades opening either through PC or a hand controller. The slit width can also be controlled manually with a micrometer screw. The slit height is regulated by a diaphragm in the range of 0 – 10 mm.

Control of the MSDD1000 series monochromator-spectrograph

Monochromator-spectrographs of MSDD1000 series are completely automated spectral devices.

The basic control of the monochromator-spectrographs is executed through the embedded controller. It performs continuing control of commands execution received from the external control device.

Besides, the embedded controller takes control over the built-in ADC which processes signals from the integral photodetectors – PMT, photodiode and etc.

External control of the devices can is performed through PC.

DevCtrl software:

The control software DevCtrl is supplied with the monochromator-spectrograph.

DevCtrl controls over all drivers and units of the device and accessories. The software also gives an access to the system parameters and setup coefficients of the device.

DevCtrl - control software for MSDD1000 monochromator-spectrograph

Spectroscopy software SpectraSP:

Spectroscopy software SpectraSP is intended for joint control over monochromator-spectrographs and detection systems based on the integral or multi-element photodetectors. SpectraSP provides simultaneous control over the device and optical radiation detection process by means of various detectors with subsequent processing of acquired data and their graphical representation.

More about SpectraSP

Via SpectraSP is performed:

  • control of the device units and mechanisms
  • registration of optical radiation using various detectors
  • processing of spectral measurements results
  • visualization of the acquired results in the form of a graphical image of the spectra
Spectroscopy software SpectraSP

Diagrams of possible configurations of MSDD1000

Accessories connected to the input ports of MSDD1000 monochromator-spectrograph
Accessories connected to the input ports of MSDD1000
Accessories connected to the output ports of MSDD1000 monochromator-spectrograph
Accessories connected to the output ports of MSDD1000

Additional equipment: