Goodrich Corporation

Robert Noll

Alexander J Majewski

Rene Abreu

Malcolm J MacFarlane

Aaron Turner

An apparatus is provided that includes a field reflector and a plurality of pairs of object reflectors. The apparatus also includes a plurality of source and detector port pairs, where each source port is configured to pass a beam of radiation, and each detector port is configured to receive a beam of radiation. The source and detector ports of each pair are positioned proximate an outer edge of the field reflector such that an optical axis of the field reflector lies between the respective source port and detector port. The object reflectors and source and detector port pairs are arranged such that each source and detector port pair is associated with a respective pair of object reflectors forming a distinct channel, where the source and detector port pair, and centers of the associated pair of object reflectors, of each channel lie in a distinct plane.

Multi-channel optical cell

A method is provided that includes receiving and processing a sample signal scan. Processing the sample signal scan includes applying an inner-product operation on the sample signal scan and each of a plurality of eigenvectors to generate a plurality of corresponding coefficients, and subtracting the sample signal scan from a linear combination of the eigenvectors and corresponding coefficients to thereby produce a corrected sample signal scan. In this regard, the eigenvectors have been generated by decomposing a plurality of background reference signal scans according to a singular value decomposition technique. The signal scans include a plurality of electromagnetic signal measurements at a discrete set of frequencies, where each measurement has been taken by a spectrometer system passing an electromagnetic signal through a sample cell including just a base medium (for the background reference signal scans), or both a base medium and a sample medium (for the sample signal scan).

Apparatus, method and computer-readable storage medium for processing a signal in a spectrometer system

A system is provided that includes a cavity ring-down spectrometer and a processor. The spectrometer is configured to pass, through a cavity resonator, a modulated, continuous-wave electromagnetic signal at each of one or more selectable, transmission frequencies in the Terahertz region of the electromagnetic spectrum. The spectrometer includes a transmitter that, with the cavity resonator, is configured so as to excite a single resonant mode of the cavity resonator. The processor is configured to receive a measurement of the passed portion of the modulated electromagnetic signal, and determine a phase shift of the modulated electromagnetic signal based upon the measurement. The processor is then configured to calculate a ring-down time of the cavity resonator as a function of the phase shift.

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Fairfield, CT, United States of America

Robert Noll