DMc150 Double Monodchromator

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The compact double DMc150 monochromator has become an industry standard for applications in which excellent stray light performance in a physically compact monochromator is an important factor.

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

Have confidence in your measurements, correction factors not required
Benefit from superlative stray light performance
Compact and portable monochromator adapts to your requirements
Available with integrated detection electronics for a portable spectroradiometer solution

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

Monochromator Configurations

Monochromator Configurations

Filters

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.

Diffraction Gratings

TMs300 single monochromator top dimensions — TMs300 monochromator profile - Top profile

Filters

Slit Type

DTMs300 double monochromator top dimensions — DTMs300 monochromator profile - Top profile

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

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

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

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 Configurations

TMS300 Configuration A
TMS300 Configuration B
TMS300 Configuration C

Monochromator Configuration

Monochromator Configurations

DTMS300 Single Configuration
DTMS300 Double Configuration A
DTMS300 Double Configuration B

Monochromator Configurations

Standard Configurations
DTMc300 Single Configuration
DTMc300 Double Configuration A
DTMc300 Double Configuration B

Monochromator Configurations

Standard Configurations
TMc300 Configuration A
TMc300 Configuration B
TMc300 Configuration C

Monochromator Configurations

DMc150 Inline Configuration
DMc150 Compact Configuration
DMc150 Dual Configuration

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

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

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	External PSU supplied (DC 24V 5A)

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

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

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

Monochromator Configurations

DMc150 Inline Configuration
DMc150 Compact Configuration
DMc150 Dual Configuration

Diffraction Gratings

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

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

Slit Type

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

Software Control

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.

DMc150 data sheet (529 kB)

The Bentham Standard

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DMc150 Double Monodchromator

Benefits

Features

Filters

Diffraction Gratings

Filters

Diffraction Gratings

Filters

Diffraction Gratings

Diffraction Gratings

Further Options

Slit Type

Slit Configuration

Diffraction Gratings

Diffraction Gratings

Diffraction Gratings

Slit Configuration

Slit Type

Further Options

Related Components

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