DM160 Monochromator

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Optical system:

Optical scheme: Original, with dispersion subtraction
F\number: 1/3.6
Focal length (output): 160 mm
Stray light (halogen lamp with 350 nm cut-off filter): < 0.01%
Stray light (20 nm from laser line): 10-7


Motor: micro stepper
Drive: warm
Step size: 3.375 arc seconds
Precision: ± 1 step
Max. speed: 10 000 steps/s


Type: Ruled, concave, with a variable line density
Line density: 1200 l/mm
Blaze wavelength: 280 nm
Size: 40 х 40 х 10 mm
Operating wavelengths range (efficiency of grating > 40%):

190 - 560 nm


Reciprocal linear dispersion for first monochromator
(wavelength 546 nm):
5.2 nm/mm
Reciprocal linear dispersion for double monochromator 0 nm/mm
Spectral resolution (width of entrance and intermediate slits 0.22 mm): 1.3 nm
Repeatability: ± 0.1 nm
Wavelength accuracy: ± 0.25 nm
Average scanning step: 0.025 nm

Spectral slits

Control: manually operated
Width: 4 fixed positions
Entrance and intermediate: 0.22; 0.54; 1.1; 1.6 mm
Output: 0.44; 1.08; 2.2; 3.2 mm
Height: 6 mm

Integrated shutter

Shut time: ~100 ms
Max. frequency: 1 Hz
Control: On-board CPU or TTL-signals from the external device

Dimensions, power requirements

Overall sizes (LхWхH): 419 х 140 х 175 mm


8 kg
Electric requirements: 100 - 230 V, 50/60 Hz
Power consumption: 20 W


Central: on-board CPU
External: PC
External interface: Ethernet


DM160 is a fully automated device. The embedded controller exercises a regular control of execution of the control commands of mechanisms of the device that enter from external control unit. Besides, the internal controller operates ADC board that can be used optionally.


Dimensional drawing:


DM160 overall sizes