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Optical Sensor Prototypes: Spectral Image Sensors - FASPEC

The Fast Adaptive Spectrometer Programmable for the Evaluation of Combustion (FASPEC) sensor addresses the need for high-speed, multi-wavelength, multi-line-of-sight optical monitoring in dynamic environments such as flames. FASPEC’s unique spectrometer combines up to 16 fiber-optic light inputs, programmable wavelength tuning with a Digital Micro-mirror Device (DMD), and detection with a linear sensor array to monitor multiple views simultaneously while switching rapidly between wavelengths at a sub-millisecond rate. Spectral measurements can be acquired in a variety of ways, including a single band or several, a chemically selective matched filter response function, or an entire spectrum using Dispersive Transform Spectroscopy (DTS).

The simultaneous measurements over multiple lines-of-sight can enable tomographic reconstruction of the instantaneous shape of the flame or flow field. Applications include:

  • combustion and boiler monitoring to determine temperature, combustion efficiency, and flame location
  • measurement of the dynamics and spatial characteristics of high-temperature effluents and other gas streams

For more information about FASPEC, contact


FASPEC prototype.

Near-IR FASPEC prototype (left) and UV demonstrator (right).


Spectral Sciences, Inc. • 4 Fourth Ave • Burlington, MA 01803-3304 • (781) 273-4770