Most of the current NIR testing equipment is based on moving diffraction gratings. To obtain the spectral pattern of the material, each wavelength is measured one at a time and then directed to an exit slit.
The Tango, based on FT-NIR optics, measures all wavelengths simultaneously, so spectra can easily be co-added to increase signal to noise. The Tango eliminates the need for exit slits so there is far greater energy throughput, and more detailed sample information can be measured.
Most importantly, diffraction grating-based systems require an external standard to calibrate the wavelength, resulting in time-consuming and costly standardization procedures. The Tango FT-NIR has an internal laser that controls the wavelength with ultrahigh precision, resulting in greater accuracy over the life of one system and allowing easy exchange of data between different systems in a network.
The difference between a diffraction grating type system and an FT-NIR system is like tuning in a radio station with a knob versus hitting a button.
Tango’s RockSolidTM Interferometer at the heart of the Bruker FT-NIR portfolio is based on cube corner mirrors that have a similar effect to shock absorbers in a car. Regardless of the external vibration, the corner cube mirrors are always able to return a parallel beam, resulting in an extremely rugged analyzer.