High-Speed Resonant FTIR Spectrometer for Surface Contaminant Measurements

OPTRA proposes a high-speed resonant Fourier transform infrared (HSR-FTIR) spectrometer incorporating a multiple pass, reciprocating configuration and a resonant mirror structure to accomplish the scanning. The intended application is time-resolved thermal luminescence (TL) measurements of surface contaminants. The multiple pass configuration of the FTIR effectively reduces the physical stroke length required of the interferometer mirror for a given spectral resolution thereby enabling use of high speed linear resonant actuators such as piezos. The projected spectral acquisition rate is 10 kHz at 8 cm-1 spectral resolution over the 7-14 m spectral range. The projected per-scan noise equivalent spectral radiance (NESR) is 4×10-9 W/(cm2•ster•cm-1). The Phase I work plan will produce a conceptual design of the HSR-FTIR to be detailed, built, and tested during the Phase II.