FTIR engine


Compact FT-NIR spectroscopic module that can be incorporated into portable analytical instruments


The C15511-01 Fourier transform infrared spectrometer (FTIR) engine is compact enough to carry in just one hand. A Michelson optical interferometer and control circuit are built into a palm-sized enclosure. Spectrum and absorbance can be measured by connecting a PC via USB. It can be applied to real-time measurement performed on site without bringing the measurement sample into the analysis room as well as continuous monitoring.
The optical interferometer has a built-in light input section, beam splitter, fixed mirror, movable mirror (ϕ3 mm), and photodetector. The photodetector acquires light intensity signals that vary depending on the position of the movable mirror. The optical spectrum is obtained by processing (Fourier transform) these light intensity signals.
The FTIR engine has a built-in semiconductor laser (VCSEL: vertical cavity surface emitting laser) for monitoring the movable mirror position, which allows spectrum measurement with high wavelength accuracy.
The product includes evaluation software with functions for setting measurement conditions, acquiring and saving data, drawing graphs, and so on. Furthermore, the dynamic link library (DLL) function specifications are disclosed, so users can create their original measurement software programs.

- Compact: palm size
- Optical fiber input type
- High S/N: Suitable for diffuse reflection measurements and absorbance measurements
- Spectral response range: 1100 to 2500 nm

Various measurement examples by FTIR engine

Various data measured by HAMAMATSU and external experts are available.


Optical interferometer Michelson interferometer (with a built-in ϕ3 mm movable mirror)
Photodetector InGaAs PIN photodiode
Light input method Optical fiber input type (with SMA connector)
Interface USB 2.0
Spectral response range 1100 to 2500 nm
Spectral resolution (FWHM) (typ.) 5.7 nm
Wavelength reproducibility (max.) 0.5 nm
Wavelength temperature dependence ±0.06 nm/℃
Signal-to-noise ratio 10000
Measurement condition Spectral resolution (FWHM): Wavenumber resolution (FWHM) equivalent to 25 cm-1
Signal‐to‐noise ratio: Ratio of the peak value of the spectrum data when light is incident to the root mean square (rms) of noise in the dark state

Dimensional outline (unit: mm)

Related videos

Fourier Transform Infrared Spectrometer FTIR engine

Features, configuration, and operating principles of the FTIR engine are introduced.

Diffuse reflection measurement of powder samples

Diffuse reflection measurements of sucrose and fructose samples by the FTIR engine are demonstrated.

Diffuse reflection measurement of cloth sample

Diffuse reflection measurements of cloth with and without moisture by the FTIR engine are demonstrated.

Stability under vibration

High stability of the FTIR engine under vibration is demonstrated.

Related documents

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