MS750 series monochromator-spectrographs are universal spectral devices with big focus length, which posses a wide range of different configurations for realization of spectral tasks requiring an extra-high spectral resolution, accuracy and precision.
We offer several configurations, a wide choice of diffraction gratings, a great number of accessories and two types of the control software.
Choice of configuration:
You can choose necessary device configuration for your task to be solved from the given below list of options or you can consult our specialists on this issue.
Housing of MS750 series monochromator-spectrographs
- a housing with embedded controller
- worm mechanism of grating rotation
- input mirror
- basic mirrors (focusing and collimator)
- integrated shutter
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 options of the housing, available on request
Housing of monochromator-spectrograph MS750
Diffraction grating assembly
MS750 series monochromator-spectrographs are available with two types of diffraction grating mounting:
Automated turret (models MS7504 and MS7504i):
Up to 4 gratings may be set in the turret. Use of the automated turret allows fast switch of gratings with the help of the control program. Turret axis is orthogonal to the grating rotation axis (wavelength scanning) and provides a high repeatability of the set wavelength while the gratings are switched.
Single grating holder (models MS7501 and MS7501i):
The single grating holder allows easy manual switching of gratings. A grating is positioned in a holder with high accuracy and no additional tuning of the device is needed while the grating is changed.
Input port and entrance slit
All monochromator-spectrographs of the MS750 series have one input port on which an entrance spectral slit is installed.
There are two types of slits:
- manually operated
- automated
All spectral slits, manual and automated, have standard coupling flanges providing direct attachment of various accessories produced by SOL instruments to the entrance slit:
- optical fiber adapter
- condenser F#-matcher
- filter wheel
- fast shutters, etc.
Input port and entrance slit of MS750
Integrated shutter
MS750 series devices have an integrated shutter. It is used for measuring of the background signal or dark signal of photodetector and also for protection of the detectors from high light intensities – the shutter is automatically shut while switching the gratings, filters, zero-order wavelength setting or change of the output port. The shutter can be controlled through software or via the external device TTL-signals.
Output ports
MS750 series devices have two output ports – axial and lateral. If you intend to select output port you should use an optional motorized flip output mirror.
Exit spectral slits can be installed on any output port. Output spectral slits or adapters for different detectors can be installed on any of output ports.
MS750 monochromator-spectrographs can be provided with the following output ports:
- one axial output port
- one lateral output port
- two output ports
Two output ports of monochromator-spectrograph MS750
One axial output port:
The configuration with one axial output port is usually applied if only one detector is used.
In this configuration a fixed output mirror is used to direct the output radiation.
In this case the lateral port is covered with a cap.
One lateral output port:
This configuration is usually employed when one multi-element detector is used, though an integral detector can also be installed on the upper output port. A fixed turning mirror which directs output radiation to the upper output port is used in this configuration.
In the device configuration with one output upper port the lateral output port is closed by a blank flange.
Two output ports with mirror:
When both output ports are used, the automated output port selection mirror is installed in the device for the fast switching between the ports. For one lateral output port a fixed flip mirror is used.
When choosing an upper output port a flip mirror is used which is being brought in the optical path and directs output radiation upwards. A flip mirror is taken away from the optical path and the output radiation is directed to the lateral port with the help of a fixed turning mirror while selecting a lateral output port. A high precision of the output mirror positioning (better than 0.03 nm for 1200 l/mm grating) allows obtaining of reproducible spectra at switching output ports while scanning.
Spectral slits
Monochromator-spectrographs of MS750 series have two types of input and output spectral slits:
- manually operated
- automated (combined)
Automated spectral slit of MS750 with attached optical fiber adapter
Additional equipment:
All spectral slits have standard flanges that make possible 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:
| Width | regulated from 0 up to 2.0 mm |
| Parallellism | ± 1 µm |
| Accuracy (slit width 1 mm) | ± 10 µm |
| Repeatability | ± 1.5 µm |
| Reading accuracy (micrometer) | 2 µm |
| Height | 10 mm |
- Width: regulated from 0 up to 2.0 mm.
- Parallellism: ± 1 µm.
- Accuracy (slit width 1 mm): ± 10 µm.
- Repeatability: ± 1.5 µm.
- Reading accuracy (micrometer): 2 µm.
- Height: 10 mm.
The slit width is operated manually by means of the micrometer. Slit height is regulated by a diaphragm in the range from 0 to 10 mm. Diaphragm division value 0,5 mm.
Automated spectral slits:
| Width | regulated from 0 up to 2.0 mm |
| Parallellism | ± 1 µm |
| Accuracy (slit width 1 mm) | ± 10 µm |
| Repeatability | ± 1 µm |
| Reading accuracy (micrometer) | 2 µm |
| Step size | 0.5 µm |
| Height | 10 mm |
- Width: regulated from 0 up to 2.0 mm.
- Parallellism: ± 1 µm.
- Accuracy (slit width 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 PC control over the blades opening width. The slit width also may be controlled manually by means of a micrometer screw. The slit height is regulated by a special diaphragm.
Control of the MS750 series monochromator-spectrograph
Monochromator-spectrographs of MS750 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.
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.
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
Diagrams of possible configurations of MS750
Accessories connected to the input port of MS750
Accessories connected to the output ports of MS750
Additional equipment:
Accessories