Singapore Synchrotron Light Source

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ISMI: Infrared Spectro/Microscopy

Contact: Dr. Agnieszka Banas (
Contact: Dr. Krzysztof Banas (
Contact: Dr. Sascha Pierre Heussler( resolution FTIR spectrometer)
Contact: Userdesk (

 IFS 66v/S is a high performance research grade FTIR spectrometer, through the use of interchangeable optical components, this spectrometer is capable of acquiring data over the near-IR (10000-4000 cm-1), mid-IR (4000-400 cm-1), and far-IR (680-10 cm-1) regions.

♦ High throughput Michelson interferometer with automatic alignment
♦ Spectral range: 10 cm-1 to >10000 cm-1
♦ Spectral resolution: 0.1 cm-1
♦ Evacuable optical bench: 3 mbar
♦ Spot size 1.2x the current aperture diameter
♦ Apertures: 16 total (0.25 mm the smallest, 12.0mm-the biggest)

Measurement types
♦ Transmission
♦ Grazing incidence reflection


Infrared (IR) Micro-Spectroscopy is a quantitative analytical and non-destructive technique which has undergone a new beginning since synchrotrons have been used as a highly brilliant source . This microscope is working over the mid-IR region (4000-400 cm-1).


IR microscope - HYPERION 2000
♦ 15x infrared Schwarzschild objective for reflection and transmission measurements (also for viewing mode)
♦ 4x viewing objective to observe the sample using visible light only
Computer controlled X-Y stage
♦ 5” color LCD monitor that allows easy and real time control of the inspected sample area
♦ Color video camera enables to take picture of analyzed sample
♦ 2D imaging
♦ 20x ATR objective with Ge crystal
♦ 15x GIR objective

High resolution FTIR spectrometer - IFS 125HR
♦ Corner cube Michelson interferometer
♦ Broad spectral range: 5 cm-1 to >10000 cm-1
♦ Spectral resolution: 0.0063 cm-1
♦ Evacuable optical bench: 0.05 mbar
♦ Variable path length gas cell: 0.8 to 8 m







The spectrometers and microscope are completely controlled by the user-friendly OPUS software running on a Windows PC.

OPUS offers an extensive set of spectral processing routines such as the spectrum calculator, absorbance-to-transmission conversion, automatic baseline correction, peak picking and many more.




Beamsplitters available at ISMI beamline

Range [cm-1] Region
Si on CaF2
15000 – 1200 Near-Infrared
Ge on KBr
10000 – 400 Mid-Infrared
680 – 30 Far-Infrared
Mylar 25 µm
120 – 20 Far-Infrared
Mylar 50 µm
60 – 10 Far-Infrared
Mylar 100 µm 25 – 8 Far-Infrared

Detectors available at ISMI beamline

For spectrometer:

Detector Range [cm-1] Region Operating Temperature
Ge D425 germanium diode
15000 – 5300 NIR Room Temperature
MCT D315
10000 – 420 MIR Liquid N2
KBr/DLaTGS D301 10000 – 370 MIR Room Temperature
PE/DLaTGS D201 700 – 10 FIR Room Temperature
Si Bolometer D211 370 – 10 FIR Liquid He

For microscope:

Detector Range [cm-1] Region Operating Temperature
MCT D315
10000 – 420 MIR Liquid N2

Synchrotron radiation versus Globar source

A high photon flux and brilliance of synchrotron radiation enable IR experiments with high resolution and studies of extremely small samples difficult to reach with conventional black body (BB) radiation (Globar source). The advantage of infrared synchrotron edge radiation as compared to BB radiation comes from the phase space distribution of the infrared light emitted from a storage ring rather than from the total power delivered. As the edge radiation is emitted from a small source size into a narrow solid angle, it is much brighter than the isotropic emission of BB radiation collected under similar conditions.

To prove mentioned earlier statement very diluted sample of RDX was analyzed in transmission mode, using microscope, both synchrotron radiation and Globar were used as a source of infrared radiation, different size of slits were set in order to demonstrate differences in qualities of collected spectra.

Usage of SR in case of work with very small slits and extremely diluted samples, guarantees collection of FTIR spectra with well resolved peaks, spectra collected with use of Globar source have very low S/N ratio, all information about peaks belonging to analyzed substance seems to be rather lost.