An apparatus (300') and method capable of providing spatially multiplexed IR spectral information simultaneously in real-time for multiple samples or multiple spatial areas of one sample using IR absorption phenomena requires no moving parts or Fourier Transform during operation, and self-compensates for background spectra and degradation of component performance over time. IR spectral information and chemical analysis of the samples is determined by using one or more IR sources (310, 311), one or more sampling accessories (330, 331) for positioning the sample volumes, one or more optically dispersive elements (350), a focal plane array (FPA) (370) arranged to detec t the dispersed light beams, and a processor (380) and display (390) to contro l the FPA (370), and display(390) to control the FPA (370) and display IR spectrograph.
SIMULTANEOUS MULTI-BEAM PLANAR ARRAY IR (PAIR) SPECTROSCOPY