Multi-Purpose Compact Monochromator-Spectrograph Model M150

  • Description
  • Specifications
  • Options
  • OPTICAL BENCH FEATURES

SOLAR LS presents a new model the multi-purpose compact monochromator-spectrograph M150, which will come into the market in January 2014.

The M150 is a low-cost short-focus instrument, flexible and multifunctional, featuring a unique combination of performance specifications and equipped with all the options essential for large-size spectrographs.

Upon your request the M150 may be supplied with accessories for collecting light from the sample into the optical fiber, for matching apertures of the fiber and monochromator, etc.

Features:

  • Extremely high aperture ratio (F=1:3.6) allows using the M150 for the widest range of routine purposes, including investigations of fluorescence, reflection and transmittance in the wide spectral range from UV to IR, analysis of light sources, multi-channel spectroscopy and other applications.
  • Low stray light, due to high quality of the optical bench and careful engineering of the instrument housing, provides optimum signal-to-noise ratio.
  • Three diffraction gratings mounted on the automated turret cover a wide spectral range with the use of just one compact device.
  • Both output ports of the M150 have fully functional 30õ10mm flat field and allow connecting either two exit slits or an exit slit and a multi-channel detector, or two detectors simultaneously, at your choice.
  • High degree of the M150 automation normally involves scanning and change of Diffraction Gratings, change of order-separating Filters, adjustment of Entrance slit width and control of the Shutter for automated background subtraction. Exit slits are micrometer-driven. Output port selection is made by the manual Port Switcher located at the upper cover of the instrument.
  • Both exit slits of the M150 are equipped with precision mechanisms for slit focusing.
  • Detector adapters provide possibility of convenient axial alignment (focusing) of the detector.
  • The IMAGING Version (Optional) features a cylindrical folding mirror ensuring astigmatism compensation for the both output ports.
  • The InstrumentManipulator software arranges automated control over the M150. The SSPLine software provides detector control and allows to sew spectra obtained by several diffraction grating scans in order to get a panoramic spectrum. A lot of possibilities of mathematical spectra processing and analysis (intensity calibration, automatic search and analysis of peaks, spectra calculator, axonometric spectrum, etc.) are also provided.
  • DLL program modules and\or LabVIEW drivers are supplied free-of-charge at your request in the M150 set of supply; they help to arrange the instrument control within the general control program of your instrumentation system.

Applications:

  • Fluorescence and Raman Spectroscopy
  • As a Spectral Selection Device for Use with a Streak-Camera
  • Multichannel Spectroscopy
  • Measurements of Absorption, Reflection and Transmittance from UV to IR Range

Configuration

The M150 comprises one input port and two output ports. The input port may hold either a standard entrance slit, or a crossed entrance slit (optionally). The entrance slit is automated; slit opening width is software-controlled.

The standard optics comprises spherical and flat mirrors with Al+MgF2 coating optimised for high UV efficiency. Optionally the device may contain optics with Al+SiO2 or gold coating for high efficiency in the infrared spectral range.

The M150 includes a turret of three diffraction gratings. At your choice, the number of gratings can be reduced to one or two.

Modification Components
M150-III The standard optics and the turret with 3 diffraction gratings
M150-II The standard optics and the turret with 2 diffraction gratings
M150-I The standard optics and one diffraction grating
M150i-III The Imaging optics (astigmatism compensator) and the turret with 3 diffraction gratings
M150i-II The Imaging optics (astigmatism compensator) and the turret with 2 diffraction gratings
M150i-I The Imaging optics (astigmatism compensator) and one diffraction grating

The M150 output ports may hold either two exit slits, or one exit slit and a detector, or two detectors simultaneously.

Direct (axial) and lateral (radial) output ports operate alternately. Switching between the output ports is effected manually with the Port Switcher located at the upper cover of the instrument. The switcher moves the folding mirror, which directs light to the lateral (radial) output port. If the switcher is off, light goes to the direct (axial) output port.

The instrument is also available with one axial output port. If the radial output port is not used, it is plugged.

The M150 exit slit has 4 mounting holes M2.5 that allow you fixing your own detector to the slit housing, if necessary. Location of the mounting holes is shown in the figure below.

Note: To avoid a breakdown of the slit mechanism it is prohibited to fix any units weighing more than 1kg to the slit housing!

OptionValue
Optical schemeOptimized Czerny-Turner with one optical input and two outputs
Spectral rangeTypical 190 – 3600nm (refer to the specification below)
extended up to 15µm (at your request)
F/Number1 : 3.6
Focal length, mm142
Flat field, mm30 x 10
ImagingOption. Available on both output ports
Diffraction gratings40x40x10mm, turret with 3 gratings from the list below1)
- lines/mm1)18001200900600600400300200100100
- blaze wavelength, nm2704006007501000800150015002000500
- reciprocal linear dispersion (average), nm/mm3.24.96.49.89.415.220.130.46368
- spectral range2), nm190-540265-800400-1200500-1500660-1800530-16001000-30001000-30001330-4000330-1000
- multichannel array bandpass (average), nm813)1263)1653)2503)1204)1944)2574)3884)8004)8704)
- resolution (average), nm 0.23) 0.135) 0.33) 0.25) 0.43) 0.275) 0.63)0.64)0.954)1.254)1.94)3.84)4.24)
Entrance slits Automatic and manual adjustment
Slit width, mm 0 - 3
Slit height, mm 10
Parallelism, m+/- 1
Micrometer reading accuracy, m+/- 1
Step size, m0.5
Precision, m+/- 10
Eexit slits Manual adjustment (micrometer driven)
Slit width, mm 0 - 3
Slit height, mm 10
Parallelism, m+/- 1
Micrometer reading accuracy, m+/- 1
Step size, m0.5
Precision, m+/- 10
Filter wheelAutomatic switching
Max number of filters8
Standard number of filters5
Filter size, mm20
Light aperture, mm18
Integrated shutterProgram-controlled, serves for measuring dark signal
Computer interfaceFull-Speed USB interface
Dimensions, mm308 * 226 * 188
Weight, kg12

1) Upon your request diffraction gratings with a different number of lines per mm and blaze angle can be used.

2) Wavelength range with diffraction efficiency higher than 40%.

3) For the detector with 25m pixel size and 25.6mm length of active area.

4) For the detector with 25m pixel size and 12.8mm length of active area.

5) For the detector with 8m pixel size and 29.1mm length of active area.

The M150 monochromator-spectrograph has a wide range of options and accessories ensuring efficient collection of light from the sample located at a finite distance and in infinity, delivering light to the monochromator with and without an optical fiber, performing effective aperture matching of the optical fiber and monochromator.

All the exit slits are equipped with precision focusing devices; and detector adapters allow easy detector focusing.

Cassegrain lenses allow collecting light from objects located at a distance of 3.5m to infinity.

Adapters PS-2 and PS-3 provide for the collection of light from a closely located sample and its effective input into an optical fiber. PS-2 features high transmittance in the UV range, while PS-3 has the possibility of installing an edge filter.

  • Order Separating Filters Wheels
  • Aperture Matching Adapters
  • Condensers for collecting light into the fiber
  • Condensers for collecting light into the monochromator
  • Crossed Entrance Slit (optionally installed instead of the Standard Entrance Slit)
  • Optical Fibers
  • Adapters for attaching CCD detectors
  • CCD detectors
  • Cassegrain lenses

Consult a SOLAR LS specialist to select the complete set of your monochromator-spectrograph that best meets the requirements of your instrument complex.

Multi-channel CCD detectors


The unique vacuum technology UltravacTM; deep thermoelectric cooling (down to -100C)
Multichannel CCD detectors by ANDOR Technology TM
iVac Series, Spectroscopic CCD DR 324B-FI model, front-illuminated CCD sensor, UltraVacTM thermo-electric cooling down to -60C, spectral range 400-1000nm, 1650*200pixels, pixel size 16*16m, image area 26.4mm * 3.2mm, 16 bits digitisation
iDus Series, Spectroscopic CCD DV 401A-BV model, back-illuminated CCD sensor, UltraVacTM thermo-electric cooling down to -70C, spectral range 200-1100nm, 1024*127pixels, pixel size 26*26m, image area 26.6mm * 3.6mm, 16 bits digitisation
DU 401A-BV model, back-illuminated CCD sensor, UltraVacTM thermo-electric cooling down to -100C, spectral range 200-1100nm, 1024*127pixels, pixel size 26*26m, image area 26.6mm * 3.6mm, 16 bits digitisation.
Newton Series, EMCCD DU970P-FI model (*), front-illuminated EMCCD sensor, UltraVacTM thermo-electric cooling down to -100C, spectral range 400-1000nm, 1600*200pixels, pixel size 16*16m, dual output amplifier, crop mode, Variable readout speed up to 3MHz, 16 bits digitisation.
DU970P-BV model (*), back-illuminated EMCCD sensor, UltraVacTM thermo-electric cooling down to -100C, spectral range 200-1000nm, 1600*200pixels, pixel size 16*16m, dual output amplifier, crop mode, Variable readout speed up to 3MHz, 16 bits digitisation
iStar Series, Gated iCCD DH320T-25U-03 model (*), Ultra Fast Gated Intensified CCD Camera, spectral range 200-900nm, 124*256 CCD 100% Fill Factor, 25mm tube, Gen2 Multialkali S20 Photocathode, P43 phosphor Multi-Mhz Readout Speeds, Integrated Digital Delay Generator, 3 ns Crop Mode sensor, Photocathode dry gas purge port, USB data interface.

(*) other models are supplied upon request

Two-dimensional HAMAMATSU arrays for the 200-1100nm range
UC-16H7306, Spectroscopic CCD S7030-1006 sensor, non-cooled, spectral range 200-1100nm, 1024x64 pixels, pixel size 24x24m, image area 24.6x1.4mm, 16 bit digitisation
UC-16H7307, Spectroscopic CCD S7030-1007 sensor, non-cooled, spectral range 200-1100nm, 1024x128 pixels, pixel size 24x24m, image area 24.6x2.9mm, 16 bit digitisation
UC-16H7316, Spectroscopic CCD S7031-1006 back-illuminated sensor, ÒÅ cooling 10C, spectral range 200-1100nm, 1024x64 pixels, pixel size 24x24m, image area 24.6x1.4mm, 16 bit digitisation
UC-16H7317, Spectroscopic CCD S7031-1007 back-illuminated sensor, ÒÅ cooling 10C, spectral range 200-1100nm, 1024x128 pixels, pixel size 24x24m, image area 24.6x2.9mm, 16 bit digitisation
UC-16H7318, Spectroscopic CCD S7031-1008 back-illuminated sensor, ÒÅ cooling 10C, spectral range 200-1100nm, 1024x256 pixels, pixel size 24x24m, image area 24.6 x 6.1mm, 16 bit digitisation
Linear InGaAs HAMAMATSU sensors for NIR-range 900-1700nm (up to 2600nm)
UC-16H904, InGaAs sensor G9204-512D image sensor, spectral range 0.9-1.7m, non-cooled, 512 pixels, pixel size 25x500m, image area 12.8x0.5mm, 16 bit digitisation
UC-16H912, InGaAs sensor G9212-512S image sensor, InGaAs, spectral range 0.9-1.7m, ÒÅ cooling 10C, 512 pixels, pixel size 25x250m, image area 12.8x0.25mm, 16 bit digitisation
UC-16H914, InGaAs sensor G9214-512S image sensor, InGaAs, spectral range 0.9-1.7m, ÒÅ cooling 10C, 512 pixels, pixel size 25x500m, image area 12.8x0.5mm, 16 bit digitisation
UC-16H908, InGaAs sensor G9208-256W image sensor, InGaAs, spectral range 0.9-2.6m, ÒÅ cooling 20C, 256 pixels, pixel size 50x250m, image area 12.8x0.25mm, 16 bit digitisation
Linear non-cooled sensors for the 200-1100nm range
UC-12T3 TCD1304 image sensor, spectral range 190-1100nm, non-cooled, 3648 pixels, pixel width 8m, image area 29.18x0.2mm, 14 bit digitisation
UC-12T2 TCD1205 image sensor, spectral range 200-1100nm, non-cooled, 2048 pixels, pixel width 14m, image area 28.672x0.2mm,14 bit digitisation
UC-14H83 S8378-1024Q image sensor, spectral range 200-1100nm, non-cooled, 1024 pixels, pixel width 25m, image area 25.6x0.2mm,14 bit digitisation
U2C-16H11156 S11156-2048-01 image sensor, spectral range 200-1100nm, non-cooled, 2048 pixels, pixel width 14m, element size 28.672x1.0mm, 16 bit digitisation, integrated electric shutter, reading rate 5MHz, min. storage time 31s

Optical Bench Features

The M150 is a short-focus monochromator combining compact size with extremely high aperture ratio (F=1:3.6).

The main difficulty encountered at the development of the M150 optical bench was a necessity to ensure high optical quality within a miniature short-focus device with large-size optical elements and large angles at mirrors and gratings. This task was solved on the basis of the modified Czerny-Turner optical bench, where the entrance slit and exit slit (the centre of spectrum) are arranged asymmetrically relative to the diffraction grating. The unique combination of high aperture ratio and outstanding line quality was implemented by careful optimisation of focal distances for collimator and camera mirrors, and of angular relationship at the optical elements. The M150i (Imaging) modification contains a specifically designed astigmatism compensator, which is installed into the M150 optical bench instead of the first folding mirror and ensures absence of astigmatism at both output ports of the instrument.

Another difficulty encountered at the stage of the M150 development and brilliantly solved by our designers, was a necessity to place maximum functionality and convenience of use in a miniature design.

The result is the M150 a multifunctional short-focus monochromator-spectrograph featuring the unique combination of performance specifications and equipped with all the options common for large-size monochromators and spectrographs. The M150 comprises two output ports and provides the possibility of full-featured operation with both of them. Either port may hold an entrance slit with a smooth-focusing mechanism or a CCD-detector with an adapter which provides its easy alignment by focus.

The large 30mmx10mm flat filed of the M150 spectrograph ensures a large multichannel array bandpass and a possibility of high-quality software sewing of spectra obtained in several scans.

The M150 is also compatible with all the accessories by SOLAR LS: a wheel of order-separating filters, adapters for matching apertures of the fiber and monochromator, adapters for collecting light into the optical fiber, etc.

Astigmatism compensation

Generally, astigmatism is common to all spectral instruments; this is a phenomenon when the point on the entrance slit is displayed in the image plane as a vertical segment. The M150 astigmatic segment is 8mm in the center of the flat field, and 6.5 mm and 10 mm at the edges of the field respectively. Astigmatism does not usually impair the instrument resolution, but, depending on the height of the detector used, can affect the overall sensitivity of the system.

Astigmatism correction is imperative in the multichannel spectroscopy, in case you need to adequately convey the light distribution along the slit, as well as for the use of the spectrograph with 2D detectors in the Imaging mode.

The M150i astigmatism compensator is a cylindrical mirror which is installed after the entrance slit instead of a flat folding mirror. Astigmatism is compensated at the both output ports. Introducing the astigmatism compensator in the optical scheme allows correcting astigmatism in the exit slit plane to the value of about 50m. This fact must be considered when calculating the expected optical resolution of the M150 with a specific grating. Astigmatism compensation also affects the M150 vertical magnification:

M150 magnification Horizontal magnification Vertical magnification
without astigmatism compensation 1.15 1.0
with astigmatism compensation 1.15 1.35