Patent ID: 7423749

Claim:
An encoded photometric infrared spectroscopy analyzer employing orthogonal encoded components having substantially identical modulation frequencies, the analyzer comprising: first optics adapted to collect and focus radiation from a source to form a dispersed image along an encoding axis, the dispersed image characteristic of the spatial components of the source; a spatial radiation modulator having at least two radiation filters located at different positions along the encoding axis, the radiation filters configured to modulate the spatial components with different modulation functions to provide an encoded beam comprising at least two encoded spatial components, wherein a pair of the radiation filters have the same modulation frequency and are substantially orthogonal to one another; a detector; second optics adapted to collect and direct the encoded beam onto the detector, causing the detector to provide an output corresponding to the encoded beam; and a processor for analyzing the output from the detector to determine the spatial components modulated in the encoded beam.