DMc150 Double Monochromator

Designed for use in applications in which scattered light must be kept to a minimum, the highly successful DMc150 double monochromator provides excellent optical performance in a small footprint.

Compatible with the full range of sources, detectors and accessories of the Bentham portfolio, the DMc150 monochromator is at the heart of many of our light measurement solutions particularly in the UV, visible and NIR, notably used in the measurement of UV sources, solar irradiance, solar simulators and in the verification of NVIS compatibility.

Key features include:


Configuration Pair symmetrical Czerny Turner monochromators arranged for additive dispersion
Focal length Total focal length: 300mm; Individual Units: 150mm
Grating mount Kinematic mount
Number of gratings 1 pair
See separate Gratings page for full range
Grating size 33 x 33mm
Aperture f/4 (at all grating angles)
Number of entrance/ exit ports 1/2 or 2/1
Mechanical resolution drive 0.000072°/ step
Slit type Fixed, micrometer or motorised variable
Slit Width & Height 10µm - 8mm (W) x 20mm (H)
Filter Size 25mm diameter
See separate Order Sorting Filters page for full range
OPTICAL PERFORMANCE (quoted for 1200g/mm gratings)
Spectral Range Within range 200nm-2500nm
Linear Dispersion 2.7nm/mm
Wavelength accuracy ± 0.3nm, ± 0.05nm with software correction
Wavelength reproducibility ± 0.05nm
Resolution full/reduced slit height 0.5/0.1nm
Stray light rejection at 2.5 FWHM 10^-8
Wavelength acquisition speed 30nm/s
Computer interface USB 2.0
Software Control BenWin+/ SDK
Overall dimensions 314w x 393d x 194h mm
Optical height 118 mm
Weight 12 kg
Power supply Mains input 110/220V 50/60Hz
Diffraction gratings See separate Gratings page
Order sorting filters See separate Order Sorting Filters page
Filter wheel 252-8 (8-position filter wheel, includes shutter)



ICzerny-Turner double monochromator CCzerny-Turner double monochromator

DCzerny-Turner double monochromator

Dimensions - side view


Dimensions - top view

Top view