• DMc150 compact double monochromator

Comprising twin 150mm focal length Czerny Turner single monochromators operating in tandem with additive dispersion, the DMc150 offers exceptional optical performance within a small footprint.

Compatible with the full range of sources, detectors and entrance optics of the Bentham portfolio, the DMc150 is at the heart of many of our light measurement solutions including those for:-

  • Type-testing of tanning appliances
  • Accurate dosimetry of sources used in phototherapy (including PDT and PUVA)
  • Monitoring of solar UV irradiance
  • NVIS compatibility testing

Benefits

Features

  • Comprises twin 150mm focal length monochromators
  • Built in a single casting, for optimised rigidity and robustness
  • Stepping motor and sine bar driven diffraction gratings
  • Predictable sinusoidal wavelength accuracy
  • One entrance and up to two exit ports with automated mirror-based port selection for use of multiple input/ output configurations
  • Control electronics integrated and fully automated via USB 2.0 interface

Optical Layout

Configuration Pair symmetrical Czerny Turner monochromators, additive dispersion
Focal length Total focal length: 300mm
Individual Units: 150mm
Grating mount Kinematic
Number of gratings 1 pair
Grating size 33x33mm
Aperture ratio f/4
Number of entrance/exit ports 1 entrance, 1-2 exits
Spectral range Within range 200nm-2400nm

Opto-Mechanical

Wavelength scanning By integrated stepping motor and micro-stepping drive electronics
Slit type Fixed, micrometer or motorised variable
Slit width & height 10µm-10mm (W) x 20mm (H)
Filter size - 6 position filter wheel : 25mm diameter
- 8 position filter wheel : 22mm diameter

Optical Performance (quoted for typical 2400 g/mm gratings)

Spectral range 200-600nm
Linear dispersion 1.35nm/mm
Wavelength accuracy ± 0.15nm, ± 0.05nm with software correction
Wavelength reproducibility ± 0.05nm
Resolution full/reduced slit height 0.25/0.1nm
Stray light rejection at 2.5 FWHM 10-8
Wavelength acquisition speed 30nm/s

Automation

Computer interface USB 2.0
Software control BenWin+/SDK

Neutral density filters A range of metallic neutral density filters, for installation in the IDR150 filter wheel, are available for the purposes of signal attenuation.
Purge port Installation of purge ports on IDR150 to enable purging of the space within the monochromator for VUV work.
TMs300 single monochromator top dimensions
TMs300 monochromator profile - Top profile
DTMs300 double monochromator top dimensions
DTMs300 monochromator profile - Top profile

Filters

Diffraction Graings

Filters

Diffraction Gratings

Filters

Filters

Slit Type

Order Sorting

Order Sorting

Diffraction Gratings

Filters

Diffraction Gratings

Filters

Monochromator Dimensions

DTMs300 double monochromator side dimensions
DTMs300 monochromator profile - Side profile

Monochromator Dimensions

TMs300 single monochromator side dimensions
TMs300 monochromator profile - Side profile

Monochromator Dimensions

Monochromator Dimensions

DTMc300 double monochromator front dimensions
DTMc300 monochromator profile - Front profile
DTMc300 double monochromator side dimensions
DTMc300 monochromator profile - Side profile
DTMc300 double monochromator top dimensions
DTMc300 monochromator profile - Top profile

Monochromator Dimensions

Monochromator Dimensions

TMc300 single monochromator front dimensions
TMc300 monochromator profile - Front profile
TMc300 single monochromator side dimensions
TMc300 monochromator profile - Side profile
TMc300 single monochromator top dimensions
TMc300 monochromator profile - Top profile

Monochromator Dimensions

Monochromator Dimensions

DMc150 double monochromator front dimensions
DMc150 monochromator profile - Front profile
DMc150 double monochromator side dimensions
DMc150 monochromator profile - Side profile
DMc150 double monochromator top dimensions
DMc150 monochromator profile - Top profile

Monochromator Dimensiona

Monochromator Dimensions

TMc150 single monochromator front dimensions
TMc150 monochromator profile - Front profile
TMc150 single monochromator side dimensions
TMc150 monochromator profile - Side profile
TMc150 single monochromator top dimensions
TMc150 monochromator profile - Top profile

Monochromator Configuration

Monochromator Configurations

Monochromator Configurations

Monochromator Configurations

Software Control

The DTMs300 may be controlled by PC, facilitated via a USB 2.0 interface by Bentham’s Benwin+ spectroradiometer software, responsible for:

  • Accessing grating filter wheel and slit properties
  • Identifying grating type and position
  • Wavelength selection and calibration
  • Spectral measurements
  • System calibration
  • Configuration files syntax

Alternatively, Bentham offers a comprehensive SDK for user-written programs, available across a wide range of platforms (LabVIEW, Matlab, C++, SPCI protocol, etc.).

Further Options

ND/ BP filters Neutral density filters, used to attenuate optical signal level or band pass filters, to improve monochromator stray light performance, may be mounted in the filter wheel.
Purge ports Purge ports fitted to monochromator to allow purging with nitrogen to remove atmospheric absorbants which absorb in the UV (<200nm) and IR (Various absorption bands).
Toroidal mirrors Toroidal mirrors spherical mirrors replaced with toroidal mirrors for imaging applications.
Turret-mirror A mirror may be fitted on a free location on the turret for the purposes of relating un-diffracted light to the exit port.
418-INT 418 optical chopper mounted behind the entrance slit.
Interchangeable turrets For applications where very wide spectral range or regional optimisation is required, an interchangeable turret is available allowing the exchange of groups of three diffraction gratings to cover different spectral regions. In this case, the stepping motor in this case drives a platform to which is attached the grating assembly.
Shutter Solenoid-based shutter for timed exposure applications.
Spectral range Required OS filter
<400 m None
400-700nm OS400
700-1250nm OS700
1250-2000nm OS1250
2000-3600nm OS2000
3.6-6 µm OS3600
6-10.5 µm OS6000
10.5-21 µm OS10500
> 21µm Please consult.

Filters

An order sorting filter wheel is located inside the entrance port of the DTMs300 monochromator, fitted with 8 filters selected for the spectral range of use.

When measuring below 400nm, no filters are required as the corresponding wavelength of the subsequent diffraction order is less than 200nm, which is naturally blocked by the atmosphere.

Slits

Slit type Features
Fixed slits (FSS) - Manually controlled
- Spring leaf to ensure the correct placement of the slit
Micrometer variable slits (VSS) - Manually controlled
- Bi-lateral slits
- Variable from 10µm to 10mm
Motorised variable slits (MVSS) - PC control via USB
- Driven via internal monochromator electronics or external MAC electronics bin
- Comprising stepping motor driven bi-lateral slits
- Variable from 10µm to 10mm
Grating Line density (g/mm) Grating type & Blaze wavelength Maximum wavelength range (nm)
GA-T324R0U25 2400 Plane ruled, 250nm blaze 200-600
GA-T324H0U25 2400 Plane holographic, 250nm blaze 200-600
GA-T324H0U3 2400 Plane ruled, 300nm blaze 200-600
GA-T318H0U25 1800 Plane holographic, 250nm blaze 250-900
GA-T318R0U4 1800 Plane ruled, 400nm blaze 250-900
GA-T318R0U5 1800 Plane ruled, 500nm blaze 250-900
GA-T312H0U25 1200 Plane holographic, 250nm blaze 300-1,200
GA-T312R0U4 1200 Plane ruled, 400nm blaze 300-1,200
GA-T312R0U5 1200 Plane ruled, 500nm blaze 300-1,200
GA-T312R0U75 1200 Plane ruled, 750nm blaze 300-1,200
GA-T312R0U9 1200 Plane ruled, 900nm blaze 300-1,200
GA-T312R1U0 1200 Plane ruled, 1µm blaze 300-1,200
GA-T3083R1U2 830 Plane ruled, 1.2µm blaze 600-1,800
GA-T306R1U0 600 Plane ruled, 1µm blaze 800-2,500
GA-T306R1U25 600 Plane ruled, 1.25µm blaze 800-2,500
GA-T306R1U6 600 Plane ruled, 1.6µm blaze 800-2,500
GA-T306R1U9 600 Plane ruled, 1.9µm blaze 800-2,500
GA-T306R2U16 600 Plane ruled, 2.16µm blaze 800-2,500
GA-T304R1U6 400 Plane ruled, 1.6µm blaze 1,000-3,000
GA-T303R3U0 300 Plane ruled, 3µm blaze 1,500-5,500
GA-T303R4U0 300 Plane ruled, 4µm blaze 1,500-5,500
GA-T3015R4U0-AU 150 Plane ruled, 4µm blaze. Gold coated. 3,000-10,000
GA-T3015R6U0-AU 150 Plane ruled, 6µm blaze. Gold coated. 3,000-10,000
GA-T301R9U0-AU 100 Plane ruled, 9µm blaze. Gold coated. 4,500-16,000
GA-T30075R10U0-AU 75 Plane ruled, 10µm blaze. Gold coated. 6,000-20,000
GA-T30075R12U0-AU 75 Plane ruled, 12µm blaze. Gold coated. 6,000-20,000
GA-T3005R18U0-AU 50 Plane ruled, 18µm blaze. Gold coated. 9,000-30,000
GA-T3005R19U5-AU 50 Plane ruled, 19.5µm blaze. Gold coated. 9,000-30,000

Diffraction Gratings

A range of gratings are available depending on the spectral range of consideration, with up to three diffraction gratings mounted to each turret of the DTMS300.

Options

Diffraction gratings See Configurations Tab
Order sorting filters See Configurations Tab
Filter wheel 252-8 (8-position filter wheel, includes shutter)

Electrical/ Mechanical

Overall dimensions 624L x 375W x 255H mm
Optical height 168mm
Weight Approx. 30 kg
Power supply Mains input 110/220V 50/60Hz

Automation

Computer interface USB 2.0
Software control BenWin+/ SDK

Optical Performance (quoted for 1200 g/mm gratings)

Spectral range Within range 200nm-50µm
Linear dispersion 1.35nm/mm
Wavelength accuracy ± 0.1nm
Wavelength reproducibility ± 0.025nm
Resolution full/reduced slit height 0.15/ 0.05nm
Stray light rejection at 2.5 FWHM 10-8
Wavelength acquisition speed 2000nm/s

Opto-Mechanical

Mechanical resolution drive 0.000072°/ step
Slit type Fixed, micrometer or motorised variable
Slit width & height 10µm-10mm (W) x 20mm (H)
Filter size 23mm diameter

Optical Layout

Configuration Pair symmetrical Czerny Turner monochromators arranged for additive dispersion
Focal length Total focal length: 600mm
Individual units: 300mm
Grating mount Triple grating turret
Number of gratings 1-3
Grating size 68 x 84mm
Aperture ratio f/4.1 (at all grating angles)
Number of entrance/ exit ports 1/2 or 2/1 on both monochromators

Software Control

The TMS300 may be controlled by PC, facilitated via a USB 2.0 interface by Bentham’s Benwin+ spectroradiometer software, responsible for:

  • Accessing grating filter wheel and slit properties
  • Identifying grating type and position
  • Wavelength selection and calibration
  • Spectral measurements
  • System calibration
  • Configuration files syntax

Alternatively, Bentham offers a comprehensive SDK for user-written programs, available across a wide range of platforms (LabVIEW, Matlab, C++, SPCI protocol, etc.).

Further Options

ND/ BP filters Neutral density filters, used to attenuate optical signal level or band pass filters, to improve monochromator stray light performance, may be mounted in the filter wheel.
Purge ports Purge ports fitted to monochromator to allow purging with nitrogen to remove atmospheric absorbants which absorb in the UV (<200nm) and IR (Various absorption bands).
Toroidal mirrors Toroidal mirrors spherical mirrors replaced with toroidal mirrors for imaging applications.
Turret-mirror A mirror may be fitted on a free location on the turret for the purposes of relating un-diffracted light to the exit port.
418-INT 418 optical chopper mounted behind the entrance slit.
Interchangeable turrets For applications where very wide spectral range or regional optimisation is required, an interchangeable turret is available allowing the exchange of groups of three diffraction gratings to cover different spectral regions. In this case, the stepping motor in this case drives a platform to which is attached the grating assembly.
Shutter Solenoid-based shutter for timed exposure applications.
Spectral range Required OS filter
<400 m None
400-700nm OS400
700-1250nm OS700
1250-2000nm OS1250
2000-3600nm OS2000
3.6-6 µm OS3600
6-10.5 µm OS6000
10.5-21 µm OS10500
> 21µm Please consult.

Filters

An order sorting filter wheel is located inside the entrance port of the monochromator, fitted with 6 filters selected for the spectral range of use.

When measuring below 400nm, no filters are required as the corresponding wavelength of the subsequent diffraction order is less than 200nm, which is naturally blocked by the atmosphere.

Slits

Slit type Features
Fixed slits (FSS) - Manually controlled
- Spring leaf to ensure the correct placement of the slit
Micrometer variable slits (VSS) - Manually controlled
- Bi-lateral slits
- Variable from 10µm to 10mm
Motorised variable slits (MVSS) - PC control via USB
- Driven via internal monochromator electronics or external MAC electronics bin
- Comprising stepping motor driven bi-lateral slits
- Variable from 10µm to 10mm
Grating Line density (g/mm) Grating type & Blaze wavelength Maximum wavelength range (nm)
GA-T324R0U25 2400 Plane ruled, 250nm blaze 200-600
GA-T324H0U25 2400 Plane holographic, 250nm blaze 200-600
GA-T324H0U3 2400 Plane ruled, 300nm blaze 200-600
GA-T318H0U25 1800 Plane holographic, 250nm blaze 250-900
GA-T318R0U4 1800 Plane ruled, 400nm blaze 250-900
GA-T318R0U5 1800 Plane ruled, 500nm blaze 250-900
GA-T312H0U25 1200 Plane holographic, 250nm blaze 300-1,200
GA-T312R0U4 1200 Plane ruled, 400nm blaze 300-1,200
GA-T312R0U5 1200 Plane ruled, 500nm blaze 300-1,200
GA-T312R0U75 1200 Plane ruled, 750nm blaze 300-1,200
GA-T312R0U9 1200 Plane ruled, 900nm blaze 300-1,200
GA-T312R1U0 1200 Plane ruled, 1µm blaze 300-1,200
GA-T3083R1U2 830 Plane ruled, 1.2µm blaze 600-1,800
GA-T306R1U0 600 Plane ruled, 1µm blaze 800-2,500
GA-T306R1U25 600 Plane ruled, 1.25µm blaze 800-2,500
GA-T306R1U6 600 Plane ruled, 1.6µm blaze 800-2,500
GA-T306R1U9 600 Plane ruled, 1.9µm blaze 800-2,500
GA-T306R2U16 600 Plane ruled, 2.16µm blaze 800-2,500
GA-T304R1U6 400 Plane ruled, 1.6µm blaze 1,000-3,000
GA-T303R3U0 300 Plane ruled, 3µm blaze 1,500-5,500
GA-T303R4U0 300 Plane ruled, 4µm blaze 1,500-5,500
GA-T3015R4U0-AU 150 Plane ruled, 4µm blaze. Gold coated. 3,000-10,000
GA-T3015R6U0-AU 150 Plane ruled, 6µm blaze. Gold coated. 3,000-10,000
GA-T301R9U0-AU 100 Plane ruled, 9µm blaze. Gold coated. 4,500-16,000
GA-T30075R10U0-AU 75 Plane ruled, 10µm blaze. Gold coated. 6,000-20,000
GA-T30075R12U0-AU 75 Plane ruled, 12µm blaze. Gold coated. 6,000-20,000
GA-T3005R18U0-AU 50 Plane ruled, 18µm blaze. Gold coated. 9,000-30,000
GA-T3005R19U5-AU 50 Plane ruled, 19.5µm blaze. Gold coated. 9,000-30,000

Diffraction Gratings

A range of gratings are available depending on the spectral range of consideration, with up to three diffraction gratings mounted to the turret of the TMS300.

Options

Diffraction gratings See Configurations Tab
Order sorting filters See Configurations Tab
Filter wheel 252-6 (6-position filter wheel, includes shutter)

Electrical/ Mechanical

Overall dimensions 328L x 375W x 263H mm
Optical height 178mm
Weight Approx. 15kg
Power supply Mains input 110/220V 50/60Hz

Automation

Computer interface USB 2.0
Software control BenWin+/SDK

Optical Performance (quoted for 1200 g/mm gratings)

Spectral range Within range 200nm-50µm
Linear dispersion 2.7nm/mm
Wavelength accuracy ± 0.2nm
Wavelength reproducibility ± 0.05nm
Resolution full/reduced slit height 0.3/0.1nm
Stray light rejection at 2.5 FWHM 10-5
Wavelength acquisition speed 1000nm/s

Opto-Mechanical

Mechanical resolution drive 0.00072°/ step
Slit type Internal motorised variable
Slit width & height 10µm-10mm (W) x 20 (H)
Filter size 6-position filter wheel
Filter diameter 25mm (see separate Order Sorting Filter datasheet for full range)

Optical Layout

Configuration Symmetrical Czerny Turner
Focal length 300mm
Grating mount Triple grating turret
Number of gratings 1-3
Grating size 68 x 84mm
Aperture ratio f/4.1 (at all grating angles)
Number of entrance/ exit ports 1/2 or 2/1

Software Control

The DTMc300 may be controlled by PC, facilitated via a USB 2.0 interface by Bentham’s Benwin+ spectroradiometer software, responsible for:

  • Accessing grating filter wheel and slit properties
  • Identifying grating type and position
  • Wavelength selection and calibration
  • Spectral measurements
  • System calibration
  • Configuration files syntax

Alternatively, Bentham offers a comprehensive SDK for user-written programs, available across a wide range of platforms (LabVIEW, Matlab, C++, SCPI protocol, etc.).

Further Options

ND/ BP filters Neutral density filters, used to attenuate optical signal level or band pass filters, to improve monochromator stray light performance, may be mounted in the filter wheel.
Purge ports Purge ports fitted to monochromator to allow purging with nitrogen to remove atmospheric absorbants which absorb in the UV (<200nm) and IR (Various absorption bands).
Toroidal mirrors Toroidal mirrors spherical mirrors replaced with toroidal mirrors for imaging applications.
Turret-mirror A mirror may be fitted on a free location on the turret for the purposes of relating un-diffracted light to the exit port.
418-INT 418 optical chopper mounted behind the entrance slit.
Interchangeable turrets For applications where very wide spectral range or regional optimisation is required, an interchangeable turret is available allowing the exchange of groups of three diffraction gratings to cover different spectral regions. In this case, the stepping motor in this case drives a platform to which is attached the grating assembly.
Shutter Solenoid-based shutter for timed exposure applications.
Spectral range Required OS filter
<400 nm None
400-700 nm OS400
700-1250 nm OS700
1250-2000 nm OS1250
2000-3600 nm OS2000
3.6-6 µm OS3600
6-10.5 µm OS6000
10.5-21 µm OS10500
> 21 µm Please consult.

Filters

An order sorting filter wheel is located inside the entrance port of the monochromator, fitted with 6 or 8 filters selected for the spectral range of use.

When measuring below 400nm, no filters are required as the corresponding wavelength of the subsequent diffraction order is less than 200nm, which is naturally blocked by the atmosphere.

Slits

Slit type Features
Fixed slits (FSS) - Manually controlled
- Spring leaf to ensure the correct placement of the slit
Micrometer variable slits (VSS) - Manually controlled
- Bi-lateral slits
- Variable from 10µm to 10mm
Motorised variable slits (MVSS) - PC control via USB
- Driven via internal monochromator electronics or external MAC electronics bin
- Comprising stepping motor driven bi-lateral slits
- Variable from 10µm to 10mm
Grating Line density (g/mm) Grating type & Blaze wavelength Maximum wavelength range (nm)
GA-T324R0U25 2400 Plane ruled, 250nm blaze 200-600
GA-T324H0U25 2400 Plane holographic, 250nm blaze 200-600
GA-T324H0U3 2400 Plane ruled, 300nm blaze 200-600
GA-T318H0U25 1800 Plane holographic, 250nm blaze 250-900
GA-T318R0U4 1800 Plane ruled, 400nm blaze 250-900
GA-T318R0U5 1800 Plane ruled, 500nm blaze 250-900
GA-T312H0U25 1200 Plane holographic, 250nm blaze 300-1,200
GA-T312R0U4 1200 Plane ruled, 400nm blaze 300-1,200
GA-T312R0U5 1200 Plane ruled, 500nm blaze 300-1,200
GA-T312R0U75 1200 Plane ruled, 750nm blaze 300-1,200
GA-T312R0U9 1200 Plane ruled, 900nm blaze 300-1,200
GA-T312R1U0 1200 Plane ruled, 1µm blaze 300-1,200
GA-T3083R1U2 830 Plane ruled, 1.2µm blaze 600-1,800
GA-T306R1U0 600 Plane ruled, 1µm blaze 800-2,500
GA-T306R1U25 600 Plane ruled, 1.25µm blaze 800-2,500
GA-T306R1U6 600 Plane ruled, 1.6µm blaze 800-2,500
GA-T306R1U9 600 Plane ruled, 1.9µm blaze 800-2,500
GA-T306R2U16 600 Plane ruled, 2.16µm blaze 800-2,500
GA-T304R1U6 400 Plane ruled, 1.6µm blaze 1,000-3,000
GA-T303R3U0 300 Plane ruled, 3µm blaze 1,500-5,500
GA-T303R4U0 300 Plane ruled, 4µm blaze 1,500-5,500
GA-T3015R4U0-AU 150 Plane ruled, 4µm blaze. Gold coated. 3,000-10,000
GA-T3015R6U0-AU 150 Plane ruled, 6µm blaze. Gold coated. 3,000-10,000
GA-T301R9U0-AU 100 Plane ruled, 9µm blaze. Gold coated. 4,500-16,000
GA-T30075R10U0-AU 75 Plane ruled, 10µm blaze. Gold coated. 6,000-20,000
GA-T30075R12U0-AU 75 Plane ruled, 12µm blaze. Gold coated. 6,000-20,000
GA-T3005R18U0-AU 50 Plane ruled, 18µm blaze. Gold coated. 9,000-30,000
GA-T3005R19U5-AU 50 Plane ruled, 19.5µm blaze. Gold coated. 9,000-30,000

Diffraction Gratings

A range of gratings are available depending on the spectral range of consideration, with up to three diffraction gratings mounted to each turret of the DTMc300.

Options

Diffraction gratings See Configurations Tab
Order sorting filters See Configurations Tab
Filter wheel 252-6 or 252-8 (6/8-position filter wheel, includes shutter)

Electrical/ Mechanical

Overall dimensions 634L x 360W x 211H
Optical height 115mm
Weight 28 kg
Power supply Mains input 110/220V 50/60Hz

Automation

Computer interface USB 2.0
Software control BenWin+/SDK

Optical Performance (quoted for 1200 g/mm gratings)

Spectral range Within range 200nm-50µm
Linear dispersion 1.35nm/mm (additive)
Wavelength accuracy ± 0.1nm
Wavelength reproducibility ± 0.025nm
Resolution full/reduced slit height 0.15/0.05nm
Stray light rejection at 2.5 FWHM 10-8
Wavelength acquisition speed 2000nm/s

Opto-Mechanical

Mechanical resolution drive 0.000072°/ step
Slit type Fixed, micrometer or motorised variable
Slit width & height 10µm-10mm (W) x 20mm (H)
Filter size 23/25mm diameter

Optical Layout

Configuration Pair symmetrical Czerny Turner monochromators arranged for either additive or subtractive dispersion
Focal length Total focal length: 600mm (additive)
Individual Units: 300mm
Grating mount Triple grating turret
Number of gratings 1-3
Grating size 68 x 84mm
Aperture ratio f/4.1 (at all grating angles)
Number of entrance/ exit ports 1 or 2 in both monochromators

Software Control

The TMC300 may be controlled by PC, facilitated via a USB 2.0 interface by Bentham’s Benwin+ spectroradiometer software, responsible for:

  • Accessing grating filter wheel and slit properties
  • Identifying grating type and position
  • Wavelength selection and calibration
  • Spectral measurements
  • System calibration
  • Configuration files syntax

Alternatively, Bentham offers a comprehensive SDK for user-written programs, available across a wide range of platforms (LabVIEW, Matlab, C++, SPCI protocol, etc.).

Further Options

ND/ BP filters Neutral density filters, used to attenuate optical signal level or band pass filters, to improve monochromator stray light performance, may be mounted in the filter wheel.
Purge ports Purge ports fitted to monochromator to allow purging with nitrogen to remove atmospheric absorbants which absorb in the UV (<200nm) and IR (Various absorption bands).
Toroidal mirrors Toroidal mirrors spherical mirrors replaced with toroidal mirrors for imaging applications.
Turret-mirror A mirror may be fitted on a free location on the turret for the purposes of relating un-diffracted light to the exit port.
418-INT 418 optical chopper mounted behind the entrance slit.
Interchangeable turrets For applications where very wide spectral range or regional optimisation is required, an interchangeable turret is available allowing the exchange of groups of three diffraction gratings to cover different spectral regions. In this case, the stepping motor in this case drives a platform to which is attached the grating assembly.
Shutter Solenoid-based shutter for timed exposure applications.
Spectral range Required OS filter
<400 m None
400-700nm OS400
700-1250nm OS700
1250-2000nm OS1250
2000-3600nm OS2000
3.6-6 µm OS3600
6-10.5 µm OS6000
10.5-21 µm OS10500
> 21µm Please consult.

An order sorting filter wheel is located inside the entrance port of the monochromator, fitted with 6 filters selected for the spectral range of use.

When measuring below 400nm, no filters are required as the corresponding wavelength of the subsequent diffraction order is less than 200nm, which is naturally blocked by the atmosphere.

Slits

Slit type Features
Fixed slits (FSS) - Manually controlled
- Spring leaf to ensure the correct placement of the slit
Micrometer variable slits (VSS) - Manually controlled
- Bi-lateral slits
- Variable from 10µm to 10mm
Motorised variable slits (MVSS) - PC control via USB
- Driven via internal monochromator electronics or external MAC electronics bin
- Comprising stepping motor driven bi-lateral slits
- Variable from 10µm to 10mm
Grating Line density (g/mm) Grating type & Blaze wavelength Maximum wavelength range (nm)
GA-T324R0U25 2400 Plane ruled, 250nm blaze 200-600
GA-T324H0U25 2400 Plane holographic, 250nm blaze 200-600
GA-T324H0U3 2400 Plane ruled, 300nm blaze 200-600
GA-T318H0U25 1800 Plane holographic, 250nm blaze 250-900
GA-T318R0U4 1800 Plane ruled, 400nm blaze 250-900
GA-T318R0U5 1800 Plane ruled, 500nm blaze 250-900
GA-T312H0U25 1200 Plane holographic, 250nm blaze 300-1,200
GA-T312R0U4 1200 Plane ruled, 400nm blaze 300-1,200
GA-T312R0U5 1200 Plane ruled, 500nm blaze 300-1,200
GA-T312R0U75 1200 Plane ruled, 750nm blaze 300-1,200
GA-T312R0U9 1200 Plane ruled, 900nm blaze 300-1,200
GA-T312R1U0 1200 Plane ruled, 1µm blaze 300-1,200
GA-T3083R1U2 830 Plane ruled, 1.2µm blaze 600-1,800
GA-T306R1U0 600 Plane ruled, 1µm blaze 800-2,500
GA-T306R1U25 600 Plane ruled, 1.25µm blaze 800-2,500
GA-T306R1U6 600 Plane ruled, 1.6µm blaze 800-2,500
GA-T306R1U9 600 Plane ruled, 1.9µm blaze 800-2,500
GA-T306R2U16 600 Plane ruled, 2.16µm blaze 800-2,500
GA-T304R1U6 400 Plane ruled, 1.6µm blaze 1,000-3,000
GA-T303R3U0 300 Plane ruled, 3µm blaze 1,500-5,500
GA-T303R4U0 300 Plane ruled, 4µm blaze 1,500-5,500
GA-T3015R4U0-AU 150 Plane ruled, 4µm blaze. Gold coated. 3,000-10,000
GA-T3015R6U0-AU 150 Plane ruled, 6µm blaze. Gold coated. 3,000-10,000
GA-T301R9U0-AU 100 Plane ruled, 9µm blaze. Gold coated. 4,500-16,000
GA-T30075R10U0-AU 75 Plane ruled, 10µm blaze. Gold coated. 6,000-20,000
GA-T30075R12U0-AU 75 Plane ruled, 12µm blaze. Gold coated. 6,000-22,000
GA-T3005R18U0-AU 50 Plane ruled, 18µm blaze. Gold coated. 9,000-30,000
GA-T3005R19U5-AU 50 Plane ruled, 19.5µm blaze. Gold coated. 9,000-30,000

Diffraction Gratings

A range of gratings are available depending on the spectral range of consideration. A range of gratings are available depending on the spectral range of consideration, with up to three diffraction gratings mounted to the turret of the TMc300.

Electrical/ Mechanical

Overall dimensions 316L x 354W x 209H mm
Optical height 115mm
Weight 14 kg
Power supply Mains input 110/220V 50/60Hz

Automation

Computer interface USB 2.0
Software control BenWin+/SDK

Optical Performance (quoted for 1200 g/mm gratings)

Spectral range Within range 200nm-50µm
Linear dispersion 2.7nm/mm
Wavelength accuracy ± 0.2nm
Wavelength reproducibility ± 0.05nm
Resolution full/reduced slit height 0.3/0.1nm
Stray light rejection at 10x FWHM 5·10-5
Wavelength acquisition speed 1000nm/s

Opto-Mechanical

Mechanical resolution drive 0.000072°/ step
Slit type Fixed, micrometer or motorised variable
Slit width & height 10µm-8mm (W) x 20mm (H)
Filter size 25/ 22mm diameter

Optical Layout

Configuration Symmetrical Czerny Turner
Focal length 300mm
Grating mount Triple grating turret
Number of gratings 1-3
Grating size 68 x 84mm
Aperture ratio f/4.1 (at all grating angles)
Number of entrance/ exit ports 1/2 or 2/1

Software Control

The DMc150 may be controlled over the USB 2.0 interface using our Windows application Benwin+ or by user written code based on our SDK on a wide range of platforms (Labview, Matlab, C++ etc. Using configuration files, both applications allow:

  • Accessing grating, filter wheel and slit properties
  • Wavelength selection
  • Spectral measurements

Benwin+ includes higher functionality including:-

  • Easy system calibration
  • Obtain spectrally integrated (and weighted) quantities
  • Instantly obtain colorimetric data
  • Perform transmission, absorption and reflection measurements
  • Perform simple arithmetic functions
  • Utilities for control of translation stages, goniometers, RSB, data acquisition from other instruments etc.

Further Options

Slit type Features
Fixed slits (FSS) - Manually controlled
- Spring leaf to ensure the correct placement of the slit
Micrometer variable slits (VSS) - Manually controlled
- Bi-lateral slits
- Variable from 10µm to 10mm
Motorised variable slits (MVSS) - PC control via USB
- Driven via internal monochromator electronics or external MAC electronics bin
- Comprising stepping motor driven bi-lateral slits
- Variable from 10µm to 10mm

Slit Type

The dimension of the largest of the entrance/ exit slits defines the bandwidth of the monochromator. Fixed, micrometer variable and motorised variable slits are offered, with a slit height of 20mm. For tuneable light source applications a range of exit slit apertures are available. Please enquire for further information.

Slit Configuration

The DMc150 can be configured in the compact, in-line or dual layouts. In the latter case a solenoid-driven programmable swing away mirrors (SAM), controlled by the internal drive electronics, is fitted for port selection.

Spectral range Required OS filter
<400 nm Under standard conditions- none required
Under purged operation OS310
400-700nm OS400
700-1250nm OS700
1250-2000nm OS1250
2000-3600nm OS2000

A filter wheel is located behind the entrance slit of the DMc150 to accommodate a shutter and long pass filters as required for the spectral range of operation. A six position filter wheel, for 25mm diameter filters is fitted as standard. An eight position filter wheel, for 22mm diameter filters is required where more positions are required.

Grating Line density (g/mm) Grating type & Blaze wavelength Maximum wavelength range (nm)
GA-G1524H0U25 2400 Plane holographic, 250nm blaze 200-600
GA-G1518H0U25 1800 Plane holographic, 250nm blaze 200-800
GA-G1518R0U5 1800 Plane ruled, 500nm blaze 200-800
GA-G1512R0U4 1200 Plane ruled, 400nm blaze 300-1,100
GA-G1512R0U5 1200 Plane ruled, 500nm blaze 300-1,100
GA-G1512R0U75 1200 Plane ruled, 750nm blaze 450-1,100
GA-G15083R1U2 830 Plane ruled, 1.2µm blaze 650-1,700
GA-G1506R1U25 600 Plane ruled, 1.25µm blaze 800-2,400
GA-G1506R1U6 600 Plane ruled, 1.6µm blaze 800-2,400

Diffraction Gratings

A range of gratings are available depending on the spectral range of consideration. Diffraction gratings are supplied in pairs, on kinematic mounts to permit easy installation in the DMc150 without compromising the wavelength calibration.

Automation

Computer interface USB 2.0
Software control BenWin+/SDK

Optical Performance (quoted for typical 2400 g/mm gratings)

Spectral range 200-600nm
Linear dispersion 1.35nm/mm
Wavelength accuracy ± 0.15nm, ± 0.05nm with software correction
Wavelength reproducibility ± 0.05nm
Resolution full/reduced slit height 0.25/0.1nm
Stray light rejection at 2.5 FWHM 10-8
Wavelength acquisition speed 30nm/s

Opto-Mechanical

Wavelength scanning By integrated stepping motor and micro-stepping drive electronics
Slit type Fixed, micrometer or motorised variable
Slit width & height 10µm-10mm (W) x 20mm (H)
Filter size - 6 position filter wheel : 25mm diameter
- 8 position filter wheel : 22mm diameter

Optical Layout

Configuration Pair symmetrical Czerny Turner monochromators, additive dispersion
Focal length Total focal length: 300mm
Individual Units: 150mm
Grating mount Kinematic
Number of gratings 1 pair
Grating size 33x33mm
Aperture ratio f/4
Number of entrance/exit ports 1 entrance, 1-2 exits
Spectral range Within range 200nm-2400nm

Software Control

The TMC150 may be controlled by PC, facilitated via a USB 2.0 interface by Bentham’s Benwin+ spectroradiometer software, responsible for:

  • Accessing grating filter wheel and slit properties
  • Identifying grating type and position
  • Wavelength selection and calibration
  • Spectral measurements
  • System calibration
  • Configuration files syntax

Alternatively, Bentham offers a comprehensive SDK for user-written programs, available across a wide range of platforms (LabVIEW, Matlab, C++, SPCI protocol, etc.).

Further Options

ND/ BP filters Neutral density filters, used to attenuate optical signal level or band pass filters, to improve monochromator stray light performance, may be mounted in the filter wheel.
Purge ports Purge ports fitted to monochromator to allow purging with nitrogen to remove atmospheric absorbants which absorb in the UV (<200nm) and IR (Various absorption bands).
Toroidal mirrors Toroidal mirrors spherical mirrors replaced with toroidal mirrors for imaging applications.
Turret-mirror A mirror may be fitted on a free location on the turret for the purposes of relating un-diffracted light to the exit port.
418-INT 418 optical chopper mounted behind the entrance slit.
Interchangeable turrets For applications where very wide spectral range or regional optimisation is required, an interchangeable turret is available allowing the exchange of groups of three diffraction gratings to cover different spectral regions. In this case, the stepping motor in this case drives a platform to which is attached the grating assembly.
Shutter Solenoid-based shutter for timed exposure applications.
Spectral range Required OS filter
<400 m None
400-700nm OS400
700-1250nm OS700
1250-2000nm OS1250
2000-3600nm OS2000
3.6-6 µm OS3600
6-10.5 µm OS6000
10.5-21 µm OS10500
> 21µm Please consult.

An order sorting filter wheel is located inside the entrance port of the monochromator, fitted with 6 filters selected for the spectral range of use.

When measuring below 400nm, no filters are required as the corresponding wavelength of the subsequent diffraction order is less than 200nm, which is naturally blocked by the atmosphere.

Slits

Slit type Features
Fixed slits (FSS) - Manually controlled
- Spring leaf to ensure the correct placement of the slit
Micrometer variable slits (VSS) - Manually controlled
- Bi-lateral slits
- Variable from 10µm to 10mm
Motorised variable slits (MVSS) - PC control via USB
- Driven via internal monochromator electronics or external MAC electronics bin
- Comprising stepping motor driven bi-lateral slits
- Variable from 10µm to 10mm

Diffraction Gratings

A range of gratings are available depending on the spectral range of consideration, with up to three diffraction gratings mounted to the turret of the TMc150.

Grating Line density (g/mm) Grating type & Blaze wavelength Maximum wavelength range (nm)
GA-G1524R0U25 2400 Plane ruled, 250nm blaze 200-600
GA-G1524H0U25 2400 Plane holographic, 250nm blaze 200-600
GA-G1524H0U3 2400 Plane ruled, 300nm blaze 200-600
GA-G1518H0U25 1800 Plane holographic, 250nm blaze 250-900
GA-G1518R0U4 1800 Plane ruled, 400nm blaze 250-900
GA-G1518R0U5 1800 Plane ruled, 500nm blaze 250-900
GA-G1512H0U25 1200 Plane holographic, 250nm blaze 300-1,200
GA-G1512R0U4 1200 Plane ruled, 400nm blaze 300-1,200
GA-G1512R0U5 1200 Plane ruled, 500nm blaze 300-1,200
GA-G1512R0U75 1200 Plane ruled, 750nm blaze 300-1,200
GA-G1512R0U9 1200 Plane ruled, 900nm blaze 300-1,200
GA-G1512R1U0 1200 Plane ruled, 1µm blaze 300-1,200
GA-G15083R1U2 830 Plane ruled, 1µm blaze 600-1,800
GA-G1506R1U0 600 Plane ruled, 1µm blaze 800-2,500
GA-G1506R1U25 600 Plane ruled, 1.25µm blaze 800-2,500
GA-G1506R1U6 600 Plane ruled, 1.6µm blaze 800-2,500
GA-G1506R1U9 600 Plane ruled, 1.9µm blaze 800-2,500
GA-G1506R2U16 600 Plane ruled, 2.16µm blaze 800-2,500
GA-G1504R1U6 400 Plane ruled, 1.6µm blaze 1,000-3,000
GA-G1503R3U0 300 Plane ruled, 3µm blaze 1,500-5,500
GA-G1503R4U0 300 Plane ruled, 4µm blaze 1,500-5,500
GA-G15015R4U0-AU 150 Plane ruled, 4µm blaze. Gold coated. 3,000-10,000
GA-G15015R6U0-AU 150 Plane ruled, 6µm blaze. Gold coated. 3,000-10,000
GA-G1501R9U0-AU 100 Plane ruled, 9µm blaze. Gold coated. 4,500-16,000
GA-G150075R10U0-AU 75 Plane ruled, 10µm blaze. Gold coated. 6,000-22,000
GA-G150075R12U0-AU 75 Plane ruled, 12µm blaze. Gold coated. 6,000-22,000
GA-G15005R18U0-AU 50 Plane ruled, 18µm blaze. Gold coated. 9,000-30,000
GA-G15005R19U5-AU 50 Plane ruled, 19.5µm blaze. Gold coated. 9,000-30,000

Options

Diffraction gratings See Configurations Tab
Order sorting filters See Configurations Tab
Filter wheel 6-position order-sorting filter wheel (filter diameter 23mm)

Electrical/ Mechanical

Overall dimensions 137L x 232W x 168H mm
Optical height 110mm
Power supply External DC PSU

Automation

Computer interface USB 2.0
Software control BenWin+/SDK

Optical Performance (quoted for 1200 g/mm gratings)

Spectral range Within range 200nm-50µm
Linear dispersion 5.4 nm/mm
Wavelength accuracy ± 0.3nm
Wavelength reproducibility ± 0.01nm
Resolution full/reduced slit height 0.3/ 0.2nm
Stray light rejection at 2.5 FWHM 10-5

Opto-Mechanical

Mechanical resolution drive 0.000072°/ step
Slit type Fixed, micrometer or motorised variable
Slit width & height 10µm-10mm (W) x 20mm (H)
Filter size 25mm diameter

Optical Layout

Configuration Symmetrical Czerny Turner
Focal length 150mm
Grating mount Dual grating turret
Number of gratings 1-2
Grating size 30 x 30mm
Aperture ratio f/4.2
Number of entrance/ exit ports 1 entrance, 1 exit

Diffraction Gratings

A range of gratings are available depending on the spectral range of consideration. Diffraction gratings are supplied in pairs, on kinematic mounts to permit easy installation in the DMc150 without compromising the wavelength calibration.

Grating Line density (g/mm) Grating type & Blaze wavelength Maximum wavelength range (nm)
GA-G1524H0U25 2400 Plane holographic, 250nm blaze 200-600
GA-G1518H0U25 1800 Plane holographic, 250nm blaze 200-800
GA-G1518R0U5 1800 Plane ruled, 500nm blaze 200-800
GA-G1512R0U4 1200 Plane ruled, 400nm blaze 300-1,100
GA-G1512R0U5 1200 Plane ruled, 500nm blaze 300-1,100
GA-G1512R0U75 1200 Plane ruled, 750nm blaze 450-1,100
GA-G15083R1U2 830 Plane ruled, 1.2µm blaze 650-1,700
GA-G1506R1U25 600 Plane ruled, 1.25µm blaze 800-2,400
GA-G1506R1U6 600 Plane ruled, 1.6µm blaze 800-2,400

Order Sorting

A filter wheel is located behind the entrance slit of the DMc150 to accommodate a shutter and long pass filters as required for the spectral range of operation. A six position filter wheel, for 25mm diameter filters is fitted as standard. An eight position filter wheel, for 22mm diameter filters is required where more positions are required.

Spectral range Required OS filter
<400 nm Under standard conditions- none required
Under purged operation OS310
400-700nm OS400
700-1250nm OS700
1250-2000nm OS1250
2000-3600nm OS2000

Slit Configuration

The DMc150 can be configured in the compact, in-line or dual layouts. In the latter case a solenoid-driven programmable swing away mirrors (SAM), controlled by the internal drive electronics, is fitted for port selection.

Slit Type

The dimension of the largest of the entrance/ exit slits defines the bandwidth of the monochromator. Fixed, micrometer variable and motorised variable slits are offered, with a slit height of 20mm. For tuneable light source applications a range of exit slit apertures are available. Please enquire for further information.

Slit type Features
Fixed slits (FSS) - Manually controlled
- Spring leaf to ensure the correct placement of the slit
Micrometer variable slits (VSS) - Manually controlled
- Bi-lateral slits
- Variable from 10µm to 10mm
Motorised variable slits (MVSS) - PC control via USB
- Driven via internal monochromator electronics or external MAC electronics bin
- Comprising stepping motor driven bi-lateral slits
- Variable from 10µm to 10mm

Further Options

Neutral density filters A range of metallic neutral density filters, for installation in the IDR150 filter wheel, are available for the purposes of signal attenuation.
Purge port Installation of purge ports on IDR150 to enable purging of the space within the monochromator for VUV work.

Monochromator Dimensions

DMc150 double monochromator front dimensions
DMc150 monochromator profile - Front profile
DMc150 double monochromator side dimensions
DMc150 monochromator profile - Side profile
DMc150 double monochromator top dimensions
DMc150 monochromator profile - Top profile

Software Control

The DMc150 may be controlled over the USB 2.0 interface using our Windows application Benwin+ or by user written code based on our SDK on a wide range of platforms (Labview, Matlab, C++ etc. Using configuration files, both applications allow:

  • Accessing grating, filter wheel and slit properties
  • Wavelength selection
  • Spectral measurements

Benwin+ includes higher functionality including:-

  • Easy system calibration
  • Obtain spectrally integrated (and weighted) quantities
  • Instantly obtain colorimetric data
  • Perform transmission, absorption and reflection measurements
  • Perform simple arithmetic functions
  • Utilities for control of translation stages, goniometers, RSB, data acquisition from other instruments etc.

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